* [PATCHv6 00/10] thread-specific breakpoints in just some inferiors
[not found] <id:cover.1696368409.git.aburgess@redhat.com>
@ 2023-10-30 16:11 ` Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 01/10] gdb: create_breakpoint: add asserts and additional comments Andrew Burgess
` (9 more replies)
0 siblings, 10 replies; 12+ messages in thread
From: Andrew Burgess @ 2023-10-30 16:11 UTC (permalink / raw)
To: gdb-patches; +Cc: Andrew Burgess
In v6:
- Rebased to something closer to current HEAD, one minor issue that
needed resolving after the rebase.
- Hopefully patch #10 will be sent correctly this time. I managed
to not send patch 10/10 with the v5 series.
In v5:
- Updates after Lancelot's feedback, including, -force-condition can
no longer be abbreviated to '-', and can't be used immediately
after the breakpoint condition.
- More tests to check some of the edge cases.
In v4:
- Big update, this series now handles thread-specific and
inferior-specific breakpoints.
In v3:
- Rebased on to current upstream/master, this includes all Simon's
recent breakpoint changes. Retested with no regressions seen.
In v2:
- Rebased on current upstream/master and retested,
- No changes to code or docs.
---
Andrew Burgess (10):
gdb: create_breakpoint: add asserts and additional comments
gdb: create_breakpoint: asserts relating to extra_string/parse_extra
gdb: change 'if' to gdb_assert in update_dprintf_command_list
gdb: build dprintf commands just once in code_breakpoint constructor
gdb: don't display inferior list for pending breakpoints
gdb: parse pending breakpoint thread/task immediately
gdb: don't set breakpoint::pspace for in create_breakpoint
gdb: remove breakpoint_re_set_one
gdb: remove tracepoint_probe_create_sals_from_location_spec
gdb: only insert thread-specific breakpoints in the relevant inferior
gdb/Makefile.in | 2 +
gdb/NEWS | 11 +
gdb/ada-lang.c | 6 +-
gdb/break-catch-throw.c | 6 +-
gdb/break-cond-parse.c | 463 +++++++++++
gdb/break-cond-parse.h | 49 ++
gdb/breakpoint.c | 757 +++++++++---------
gdb/breakpoint.h | 101 ++-
gdb/testsuite/gdb.ada/tasks.exp | 6 +-
gdb/testsuite/gdb.base/condbreak.exp | 57 +-
gdb/testsuite/gdb.base/pending.exp | 23 +-
gdb/testsuite/gdb.linespec/explicit.exp | 4 +-
gdb/testsuite/gdb.mi/mi-dprintf-pending.exp | 3 +-
gdb/testsuite/gdb.mi/new-ui-bp-deleted.exp | 8 +-
.../gdb.mi/user-selected-context-sync.exp | 4 +-
.../gdb.multi/bp-thread-specific.exp | 7 +-
.../gdb.multi/inferior-specific-bp.exp | 16 +-
.../gdb.multi/multi-target-continue.exp | 2 +-
.../gdb.multi/multi-target-ping-pong-next.exp | 4 +-
.../gdb.multi/pending-bp-del-inferior.c | 28 +
.../gdb.multi/pending-bp-del-inferior.exp | 214 +++++
gdb/testsuite/gdb.multi/pending-bp-lib.c | 22 +
gdb/testsuite/gdb.multi/pending-bp.c | 66 ++
gdb/testsuite/gdb.multi/pending-bp.exp | 336 ++++++++
gdb/testsuite/gdb.multi/tids.exp | 6 +-
.../gdb.threads/del-pending-thread-bp-lib.c | 22 +
.../gdb.threads/del-pending-thread-bp.c | 85 ++
.../gdb.threads/del-pending-thread-bp.exp | 108 +++
28 files changed, 1947 insertions(+), 469 deletions(-)
create mode 100644 gdb/break-cond-parse.c
create mode 100644 gdb/break-cond-parse.h
create mode 100644 gdb/testsuite/gdb.multi/pending-bp-del-inferior.c
create mode 100644 gdb/testsuite/gdb.multi/pending-bp-del-inferior.exp
create mode 100644 gdb/testsuite/gdb.multi/pending-bp-lib.c
create mode 100644 gdb/testsuite/gdb.multi/pending-bp.c
create mode 100644 gdb/testsuite/gdb.multi/pending-bp.exp
create mode 100644 gdb/testsuite/gdb.threads/del-pending-thread-bp-lib.c
create mode 100644 gdb/testsuite/gdb.threads/del-pending-thread-bp.c
create mode 100644 gdb/testsuite/gdb.threads/del-pending-thread-bp.exp
base-commit: 2029e13917d53d2289d3ebb390c4f40bd2112d21
--
2.25.4
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCHv6 01/10] gdb: create_breakpoint: add asserts and additional comments
2023-10-30 16:11 ` [PATCHv6 00/10] thread-specific breakpoints in just some inferiors Andrew Burgess
@ 2023-10-30 16:11 ` Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 02/10] gdb: create_breakpoint: asserts relating to extra_string/parse_extra Andrew Burgess
` (8 subsequent siblings)
9 siblings, 0 replies; 12+ messages in thread
From: Andrew Burgess @ 2023-10-30 16:11 UTC (permalink / raw)
To: gdb-patches; +Cc: Andrew Burgess
This commit extends the asserts on create_breakpoint (in the header
file), and adds some additional assertions into the definition.
The new assert confirms that when the thread and inferior information
is going to be parsed from the extra_string, then the thread and
inferior arguments should be -1. That is, the caller of
create_breakpoint should not try to create a thread/inferior specific
breakpoint by *both* specifying thread/inferior *and* asking to parse
the extra_string, it's one or the other.
There should be no user visible changes after this commit.
---
gdb/breakpoint.c | 6 ++++++
gdb/breakpoint.h | 16 ++++++++++++++++
2 files changed, 22 insertions(+)
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 828c99cabc0..bf496f5e222 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -9229,6 +9229,12 @@ create_breakpoint (struct gdbarch *gdbarch,
gdb_assert (inferior == -1 || inferior > 0);
gdb_assert (thread == -1 || inferior == -1);
+ /* If PARSE_EXTRA is true then the thread and inferior details will be
+ parsed from the EXTRA_STRING, the THREAD and INFERIOR arguments
+ should be -1. */
+ gdb_assert (!parse_extra || thread == -1);
+ gdb_assert (!parse_extra || inferior == -1);
+
gdb_assert (ops != NULL);
/* If extra_string isn't useful, set it to NULL. */
diff --git a/gdb/breakpoint.h b/gdb/breakpoint.h
index e75efc90495..07370b83a24 100644
--- a/gdb/breakpoint.h
+++ b/gdb/breakpoint.h
@@ -1600,6 +1600,22 @@ enum breakpoint_create_flags
the FORCE_CONDITION parameter is ignored and the corresponding argument
is parsed from EXTRA_STRING.
+ The THREAD should be a global thread number, the created breakpoint will
+ only apply for that thread. If the breakpoint should apply for all
+ threads then pass -1. However, if PARSE_EXTRA is non-zero then the
+ THREAD parameter is ignored and an optional thread number will be parsed
+ from EXTRA_STRING.
+
+ The INFERIOR should be a global inferior number, the created breakpoint
+ will only apply for that inferior. If the breakpoint should apply for
+ all inferiors then pass -1. However, if PARSE_EXTRA is non-zero then
+ the INFERIOR parameter is ignored and an optional inferior number will
+ be parsed from EXTRA_STRING.
+
+ At most one of THREAD and INFERIOR should be set to a value other than
+ -1; breakpoints can be thread specific, or inferior specific, but not
+ both.
+
If INTERNAL is non-zero, the breakpoint number will be allocated
from the internal breakpoint count.
--
2.25.4
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCHv6 02/10] gdb: create_breakpoint: asserts relating to extra_string/parse_extra
2023-10-30 16:11 ` [PATCHv6 00/10] thread-specific breakpoints in just some inferiors Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 01/10] gdb: create_breakpoint: add asserts and additional comments Andrew Burgess
@ 2023-10-30 16:11 ` Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 03/10] gdb: change 'if' to gdb_assert in update_dprintf_command_list Andrew Burgess
` (7 subsequent siblings)
9 siblings, 0 replies; 12+ messages in thread
From: Andrew Burgess @ 2023-10-30 16:11 UTC (permalink / raw)
To: gdb-patches; +Cc: Andrew Burgess
The goal of this commit is to better define the API for
create_breakpoint especially around the use of extra_string and
parse_extra. This will be useful in the next commit when I plan to
make some changes to create_breakpoint.
This commit makes one possibly breaking change: until this commit it
was possible to create thread-specific dprintf breakpoint like this:
(gdb) dprintf call_me, thread 1 "%s", "hello"
Dprintf 2 at 0x401152: file /tmp/hello.c, line 8.
(gdb) info breakpoints
Num Type Disp Enb Address What
2 dprintf keep y 0x0000000000401152 in call_me at /tmp/hello.c:8 thread 1
stop only in thread 1
printf "%s", "hello"
(gdb)
this feature of dprintf was not documented, was not tested, and is
slightly different in syntax to how we create thread specific
breakpoints and/or watchpoints -- the thread condition appears after
the first ','.
I believe that this worked at all was simply by luck. We happen to
pass the parse_extra flag as true from dprintf_command to
create_breakpoint.
So in this commit I made the choice change this. We now pass
parse_extra as false from dprintf_command to create_breakpoint. With
this done it is assumed that the only thing in the extra_string is the
dprintf format and arguments.
Beyond this change I've updated the comment on create_breakpoint in
breakpoint.h, and I've then added some asserts into
create_breakpoint as well as moving around some of the error
handling.
- We now assert on the incoming argument values,
- I've moved an error check to sit after the call to
find_condition_and_thread_for_sals, this ensures the extra_string
was parsed correctly,
In dprintf_command:
- We now throw an error if there is no format string after the
dprintf location. This error was already being thrown, but was
being caught later in the process. With this change we catch the
missing string earlier,
- And, as mentioned earlier, we pass parse_extra as false when
calling create_breakpoint,
In create_tracepoint_from_upload:
- We now throw an error if the parsed location doesn't completely
consume the addr_str variable. This error has now effectively
moved out of create_breakpoint.
---
gdb/breakpoint.c | 42 +++++++++++++++++++++++++++++-------------
gdb/breakpoint.h | 44 +++++++++++++++++++++++++++-----------------
2 files changed, 56 insertions(+), 30 deletions(-)
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index bf496f5e222..d87123cb2f1 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -9241,6 +9241,17 @@ create_breakpoint (struct gdbarch *gdbarch,
if (extra_string != NULL && *extra_string == '\0')
extra_string = NULL;
+ /* A bp_dprintf must always have an accompanying EXTRA_STRING containing
+ the dprintf format and arguments -- PARSE_EXTRA should always be false
+ in this case.
+
+ For all other breakpoint types, EXTRA_STRING should be nullptr unless
+ PARSE_EXTRA is true. */
+ gdb_assert ((type_wanted == bp_dprintf
+ && extra_string != nullptr && !parse_extra)
+ || (type_wanted != bp_dprintf
+ && (extra_string == nullptr || parse_extra)));
+
try
{
ops->create_sals_from_location_spec (locspec, &canonical);
@@ -9304,6 +9315,8 @@ create_breakpoint (struct gdbarch *gdbarch,
if (parse_extra)
{
+ gdb_assert (type_wanted != bp_dprintf);
+
gdb::unique_xmalloc_ptr<char> rest;
gdb::unique_xmalloc_ptr<char> cond;
@@ -9312,15 +9325,15 @@ create_breakpoint (struct gdbarch *gdbarch,
find_condition_and_thread_for_sals (lsal.sals, extra_string,
&cond, &thread, &inferior,
&task, &rest);
+
+ if (rest.get () != nullptr && *(rest.get ()) != '\0')
+ error (_("Garbage '%s' at end of command"), rest.get ());
+
cond_string_copy = std::move (cond);
extra_string_copy = std::move (rest);
}
else
{
- if (type_wanted != bp_dprintf
- && extra_string != NULL && *extra_string != '\0')
- error (_("Garbage '%s' at end of location"), extra_string);
-
/* Check the validity of the condition. We should error out
if the condition is invalid at all of the locations and
if it is not forced. In the PARSE_EXTRA case above, this
@@ -9531,21 +9544,18 @@ dprintf_command (const char *arg, int from_tty)
/* If non-NULL, ARG should have been advanced past the location;
the next character must be ','. */
- if (arg != NULL)
+ if (arg == nullptr || arg[0] != ',' || arg[1] == '\0')
+ error (_("Format string required"));
+ else
{
- if (arg[0] != ',' || arg[1] == '\0')
- error (_("Format string required"));
- else
- {
- /* Skip the comma. */
- ++arg;
- }
+ /* Skip the comma. */
+ ++arg;
}
create_breakpoint (get_current_arch (),
locspec.get (),
NULL, -1, -1,
- arg, false, 1 /* parse arg */,
+ arg, false, 0 /* parse arg */,
0, bp_dprintf,
0 /* Ignore count */,
pending_break_support,
@@ -14152,6 +14162,12 @@ create_tracepoint_from_upload (struct uploaded_tp *utp)
location_spec_up locspec = string_to_location_spec (&addr_str,
current_language);
+
+
+ gdb_assert (addr_str != nullptr);
+ if (*addr_str != '\0')
+ error (_("Garbage '%s' at end of location"), addr_str);
+
if (!create_breakpoint (get_current_arch (),
locspec.get (),
utp->cond_string.get (), -1, -1, addr_str,
diff --git a/gdb/breakpoint.h b/gdb/breakpoint.h
index 07370b83a24..baa54573e1a 100644
--- a/gdb/breakpoint.h
+++ b/gdb/breakpoint.h
@@ -1585,32 +1585,42 @@ enum breakpoint_create_flags
functions for setting a breakpoint at LOCSPEC.
This function has two major modes of operations, selected by the
- PARSE_EXTRA parameter.
+ PARSE_EXTRA and WANTED_TYPE parameters.
- If PARSE_EXTRA is zero, LOCSPEC is just the breakpoint's location
- spec, with condition, thread, and extra string specified by the
- COND_STRING, THREAD, and EXTRA_STRING parameters.
+ When WANTED_TYPE is not bp_dprintf the following rules apply:
- If PARSE_EXTRA is non-zero, this function will attempt to extract
- the condition, thread, and extra string from EXTRA_STRING, ignoring
- the similarly named parameters.
+ If PARSE_EXTRA is zero, LOCSPEC is just the breakpoint's location
+ spec, with condition, thread, and extra string specified by the
+ COND_STRING, THREAD, and EXTRA_STRING parameters.
- If FORCE_CONDITION is true, the condition is accepted even when it is
- invalid at all of the locations. However, if PARSE_EXTRA is non-zero,
- the FORCE_CONDITION parameter is ignored and the corresponding argument
- is parsed from EXTRA_STRING.
+ If PARSE_EXTRA is non-zero, this function will attempt to extract the
+ condition, thread, and extra string from EXTRA_STRING, ignoring the
+ similarly named parameters.
+
+ When WANTED_TYPE is bp_dprintf the following rules apply:
+
+ PARSE_EXTRA must always be zero, LOCSPEC is just the breakpoint's
+ location spec, with condition, thread, and extra string (which
+ contains the dprintf format and arguments) specified by the
+ COND_STRING, THREAD, and EXTRA_STRING parameters.
+
+ If FORCE_CONDITION is true, the condition (in COND_STRING) is accepted
+ even when it is invalid at all of the locations. However, if
+ PARSE_EXTRA is non-zero and WANTED_TYPE is not bp_dprintf, the
+ FORCE_CONDITION parameter is ignored and the corresponding argument is
+ parsed from EXTRA_STRING.
The THREAD should be a global thread number, the created breakpoint will
only apply for that thread. If the breakpoint should apply for all
- threads then pass -1. However, if PARSE_EXTRA is non-zero then the
- THREAD parameter is ignored and an optional thread number will be parsed
- from EXTRA_STRING.
+ threads then pass -1. However, if PARSE_EXTRA is non-zero and
+ WANTED_TYPE is not bp_dprintf, then the THREAD parameter is ignored and
+ an optional thread number will be parsed from EXTRA_STRING.
The INFERIOR should be a global inferior number, the created breakpoint
will only apply for that inferior. If the breakpoint should apply for
- all inferiors then pass -1. However, if PARSE_EXTRA is non-zero then
- the INFERIOR parameter is ignored and an optional inferior number will
- be parsed from EXTRA_STRING.
+ all inferiors then pass -1. However, if PARSE_EXTRA is non-zero and
+ WANTED_TYPE is not bp_dprintf, then the INFERIOR parameter is ignored
+ and an optional inferior number will be parsed from EXTRA_STRING.
At most one of THREAD and INFERIOR should be set to a value other than
-1; breakpoints can be thread specific, or inferior specific, but not
--
2.25.4
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCHv6 03/10] gdb: change 'if' to gdb_assert in update_dprintf_command_list
2023-10-30 16:11 ` [PATCHv6 00/10] thread-specific breakpoints in just some inferiors Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 01/10] gdb: create_breakpoint: add asserts and additional comments Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 02/10] gdb: create_breakpoint: asserts relating to extra_string/parse_extra Andrew Burgess
@ 2023-10-30 16:11 ` Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 04/10] gdb: build dprintf commands just once in code_breakpoint constructor Andrew Burgess
` (6 subsequent siblings)
9 siblings, 0 replies; 12+ messages in thread
From: Andrew Burgess @ 2023-10-30 16:11 UTC (permalink / raw)
To: gdb-patches; +Cc: Andrew Burgess
I noticed in update_dprintf_command_list that we handle the case where
the bp_dprintf style breakpoint doesn't have a format and args string.
However, I don't believe such a situation is possible. The obvious
approach certainly already catches this case:
(gdb) dprintf main
Format string required
If it is possible to create a dprintf breakpoint without a format and
args string then I think we should be catching this case and handling
it at creation time, rather than having GDB just ignore the situation
later on.
And so, I propose that we change the 'if' that ignores the case where
the format/args string is empty, and instead assert that we do always
have a format/args string. The original code, that handled an empty
format/args string has existed since commit e7e0cddfb0d4, which is
when dprintf support was added to GDB.
If I'm correct and this situation can't ever happen then there should
be no user visible changes after this commit.
---
gdb/breakpoint.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index d87123cb2f1..f7279811e99 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -8539,8 +8539,9 @@ update_dprintf_command_list (struct breakpoint *b)
const char *dprintf_args = b->extra_string.get ();
gdb::unique_xmalloc_ptr<char> printf_line = nullptr;
- if (!dprintf_args)
- return;
+ /* Trying to create a dprintf breakpoint without a format and args
+ string should be detected at creation time. */
+ gdb_assert (dprintf_args != nullptr);
dprintf_args = skip_spaces (dprintf_args);
--
2.25.4
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCHv6 04/10] gdb: build dprintf commands just once in code_breakpoint constructor
2023-10-30 16:11 ` [PATCHv6 00/10] thread-specific breakpoints in just some inferiors Andrew Burgess
` (2 preceding siblings ...)
2023-10-30 16:11 ` [PATCHv6 03/10] gdb: change 'if' to gdb_assert in update_dprintf_command_list Andrew Burgess
@ 2023-10-30 16:11 ` Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 05/10] gdb: don't display inferior list for pending breakpoints Andrew Burgess
` (5 subsequent siblings)
9 siblings, 0 replies; 12+ messages in thread
From: Andrew Burgess @ 2023-10-30 16:11 UTC (permalink / raw)
To: gdb-patches; +Cc: Andrew Burgess
I noticed in code_breakpoint::code_breakpoint that we are calling
update_dprintf_command_list once for each breakpoint location, when we
really only need to call this once per breakpoint -- the data updated
by this function, the breakpoint command list -- is per breakpoint,
not per breakpoint location. Calling update_dprintf_command_list
multiple times is just wasted effort, there's no per location error
checking, we don't even pass the current location to the function.
This commit moves the update_dprintf_command_list call outside of the
per-location loop. I have also changes the 'if' that handles the case
where the extra_string (which holds the format/args) is empty. I
don't believe that this situation can ever arise -- and if it does we
should be catching it earlier and throwing an error at that point.
There should be no user visible changes after this commit.
---
gdb/breakpoint.c | 20 +++++++++-----------
1 file changed, 9 insertions(+), 11 deletions(-)
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index f7279811e99..0c2f77244f2 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -8705,19 +8705,17 @@ code_breakpoint::code_breakpoint (struct gdbarch *gdbarch_,
/* Do not set breakpoint locations conditions yet. As locations
are inserted, they get sorted based on their addresses. Let
the list stabilize to have reliable location numbers. */
+ }
- /* Dynamic printf requires and uses additional arguments on the
- command line, otherwise it's an error. */
- if (type == bp_dprintf)
- {
- if (extra_string != nullptr)
- update_dprintf_command_list (this);
- else
- error (_("Format string required"));
- }
- else if (extra_string != nullptr)
- error (_("Garbage '%s' at end of command"), extra_string.get ());
+ /* Dynamic printf requires and uses additional arguments on the
+ command line, otherwise it's an error. */
+ if (type == bp_dprintf)
+ {
+ gdb_assert (extra_string != nullptr);
+ update_dprintf_command_list (this);
}
+ else if (extra_string != nullptr)
+ error (_("Garbage '%s' at end of command"), extra_string.get ());
/* The order of the locations is now stable. Set the location
condition using the location's number. */
--
2.25.4
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCHv6 05/10] gdb: don't display inferior list for pending breakpoints
2023-10-30 16:11 ` [PATCHv6 00/10] thread-specific breakpoints in just some inferiors Andrew Burgess
` (3 preceding siblings ...)
2023-10-30 16:11 ` [PATCHv6 04/10] gdb: build dprintf commands just once in code_breakpoint constructor Andrew Burgess
@ 2023-10-30 16:11 ` Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 06/10] gdb: parse pending breakpoint thread/task immediately Andrew Burgess
` (4 subsequent siblings)
9 siblings, 0 replies; 12+ messages in thread
From: Andrew Burgess @ 2023-10-30 16:11 UTC (permalink / raw)
To: gdb-patches; +Cc: Andrew Burgess
I noticed that in the 'info breakpoints' output, GDB sometimes prints
the inferior list for pending breakpoints, this doesn't seem right to
me. A pending breakpoint has no locations (at least, as far as we
display things in the 'info breakpoints' output), so including an
inferior list seems odd.
Here's what I see right now:
(gdb) info breakpoint 5
Num Type Disp Enb Address What
5 breakpoint keep y <PENDING> foo inf 1
(gdb)
It's the 'inf 1' at the end of the line that I'm objecting too.
To trigger this behaviour we need to be in a multi-inferior debug
session. The breakpoint must have been non-pending at some point in
the past, and so have a location assigned to it.
The breakpoint becomes pending again as a result of a shared library
being unloaded. When this happens the location itself is marked
pending (via bp_location::shlib_disabled).
In print_one_breakpoint_location, in order to print the inferior list
we check that the breakpoint has a location, and that we have multiple
inferiors, but we don't check if the location itself is pending.
This commit adds that check, which means the output is now:
(gdb) info breakpoint 5
Num Type Disp Enb Address What
5 breakpoint keep y <PENDING> foo
(gdb)
Which I think makes more sense -- indeed, the format without the
inferior list is what we display for a pending breakpoint that has
never had any locations assigned, so I think this change in behaviour
makes GDB more consistent.
---
gdb/breakpoint.c | 2 +-
gdb/testsuite/gdb.multi/pending-bp-lib.c | 22 ++++
gdb/testsuite/gdb.multi/pending-bp.c | 66 ++++++++++++
gdb/testsuite/gdb.multi/pending-bp.exp | 130 +++++++++++++++++++++++
4 files changed, 219 insertions(+), 1 deletion(-)
create mode 100644 gdb/testsuite/gdb.multi/pending-bp-lib.c
create mode 100644 gdb/testsuite/gdb.multi/pending-bp.c
create mode 100644 gdb/testsuite/gdb.multi/pending-bp.exp
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 0c2f77244f2..34519b4e72a 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -6601,7 +6601,7 @@ print_one_breakpoint_location (struct breakpoint *b,
}
}
- if (loc != NULL && !header_of_multiple)
+ if (loc != NULL && !header_of_multiple && !loc->shlib_disabled)
{
std::vector<int> inf_nums;
int mi_only = 1;
diff --git a/gdb/testsuite/gdb.multi/pending-bp-lib.c b/gdb/testsuite/gdb.multi/pending-bp-lib.c
new file mode 100644
index 00000000000..15d1b9833dd
--- /dev/null
+++ b/gdb/testsuite/gdb.multi/pending-bp-lib.c
@@ -0,0 +1,22 @@
+/* Copyright 2023 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+int global_var = 0;
+
+void
+foo (int arg)
+{
+ global_var = arg;
+}
diff --git a/gdb/testsuite/gdb.multi/pending-bp.c b/gdb/testsuite/gdb.multi/pending-bp.c
new file mode 100644
index 00000000000..ca8a3c20b72
--- /dev/null
+++ b/gdb/testsuite/gdb.multi/pending-bp.c
@@ -0,0 +1,66 @@
+/* Copyright 2023 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include <dlfcn.h>
+#include <stdlib.h>
+
+void
+breakpt ()
+{
+ /* Nothing. */
+}
+
+volatile int global_counter = 0;
+
+volatile int call_count = 1;
+
+int
+main (void)
+{
+ void *handle;
+ void (*func)(int);
+
+ /* Some filler work so that we don't initially stop on the breakpt call
+ below. */
+ ++global_counter;
+
+ breakpt (); /* Break before open. */
+
+ /* Now load the shared library. */
+ handle = dlopen (SHLIB_NAME, RTLD_LAZY);
+ if (handle == NULL)
+ abort ();
+
+ breakpt (); /* Break after open. */
+
+ /* Find the function symbol. */
+ func = (void (*)(int)) dlsym (handle, "foo");
+
+ for (; call_count > 0; --call_count)
+ {
+ /* Call the library function. */
+ func (1);
+ }
+
+ breakpt (); /* Break before close. */
+
+ /* Unload the shared library. */
+ if (dlclose (handle) != 0)
+ abort ();
+
+ breakpt (); /* Break after close. */
+
+ return 0;
+}
diff --git a/gdb/testsuite/gdb.multi/pending-bp.exp b/gdb/testsuite/gdb.multi/pending-bp.exp
new file mode 100644
index 00000000000..e4f0aa2e38a
--- /dev/null
+++ b/gdb/testsuite/gdb.multi/pending-bp.exp
@@ -0,0 +1,130 @@
+# Copyright 2023 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+# Tests related to pending breakpoints in a multi-inferior environment.
+
+require allow_shlib_tests !use_gdb_stub
+
+standard_testfile
+
+set libname $testfile-lib
+set srcfile_lib $srcdir/$subdir/$libname.c
+set binfile_lib [standard_output_file $libname.so]
+
+if { [gdb_compile_shlib $srcfile_lib $binfile_lib {}] != "" } {
+ untested "failed to compile shared library 1"
+ return -1
+}
+
+set binfile_lib_target [gdb_download_shlib $binfile_lib]
+
+if { [build_executable "failed to prepare" $testfile $srcfile \
+ [list debug \
+ additional_flags=-DSHLIB_NAME=\"$binfile_lib_target\" \
+ shlib_load pthreads]] } {
+ return -1
+}
+
+# Used to override delete_breakpoints when we don't want breakpoints
+# deleted.
+proc do_nothing {} {}
+
+# Start two inferiors, both running the same test binary. The arguments
+# INF_1_STOP and INF_2_STOP are source code patterns that are passed to
+# gdb_get_line_number to figure out where each inferior should be stopped.
+#
+# This proc does a clean_restart and leaves inferior 2 selected. Also the
+# 'breakpoint pending' flag is enabled, so pending breakpoints can be created
+# without GDB prompting the user.
+proc do_test_setup { inf_1_stop inf_2_stop } {
+ clean_restart ${::binfile}
+
+ gdb_locate_shlib $::binfile_lib
+
+ if ![runto_main] {
+ return false
+ }
+
+ gdb_breakpoint [gdb_get_line_number ${inf_1_stop}] temporary
+ gdb_continue_to_breakpoint "move inferior 1 into position"
+
+ gdb_test "add-inferior -exec ${::binfile}" \
+ "Added inferior 2.*" "add inferior 2"
+ gdb_test "inferior 2" "Switching to inferior 2 .*" "switch to inferior 2"
+
+ with_override delete_breakpoints do_nothing {
+ if {![runto_main]} {
+ return false
+ }
+ }
+
+ gdb_breakpoint [gdb_get_line_number ${inf_2_stop}] temporary
+ gdb_continue_to_breakpoint "move inferior 2 into position"
+
+ gdb_test_no_output "set breakpoint pending on"
+
+ return true
+}
+
+# Check that when a breakpoint is in the pending state, but that breakpoint
+# does have some locations (those locations themselves are pending), GDB
+# doesn't display the inferior list in the 'info breakpoints' output.
+proc_with_prefix test_no_inf_display {} {
+ do_test_setup "Break before open" "Break before open"
+
+ # Create a breakpoint on 'foo'. As the shared library (that contains
+ # foo) has not been loaded into any inferior yet, then there will be no
+ # locations and the breakpoint will be created pending.
+ gdb_breakpoint "foo" allow-pending
+ set bpnum [get_integer_valueof "\$bpnum" "*INVALID*" \
+ "get foo breakpoint number"]
+
+ # Check the 'info breakpoints' output; the breakpoint is pending with
+ # not 'inf X' appearing at the end of the line.
+ gdb_test "info breakpoint $bpnum" \
+ "$bpnum\\s+breakpoint\\s+keep\\s+y\\s+<PENDING>\\s+foo" \
+ "check info bp before locations have been created"
+
+ # Now select inferior 1 and allow the inferior to run forward to the
+ # point where a breakpoint location for foo will have been created.
+ gdb_test "inferior 1" "Switching to inferior 1 .*"
+ gdb_breakpoint [gdb_get_line_number "Break after open"] temporary
+ gdb_continue_to_breakpoint \
+ "move inferior 1 until a location has been added"
+
+ # Check the 'info breakpoints' output. Notice we display the inferior
+ # list at the end of the breakpoint line.
+ gdb_test "info breakpoint $bpnum" \
+ "$bpnum\\s+breakpoint\\s+keep\\s+y\\s+$::hex\\s+<foo\[^>\]*>\\s+inf 1" \
+ "check info breakpoints while breakpoint is inserted"
+
+ # Continue inferior 1 until the shared library has been unloaded. The
+ # breakpoint on 'foo' will return to the pending state. We will need to
+ # 'continue' twice as the first time will hit the 'foo' breakpoint.
+ gdb_breakpoint [gdb_get_line_number "Break after close"] temporary
+ gdb_continue_to_breakpoint "hit the breakpoint in foo"
+ gdb_continue_to_breakpoint "after close library"
+
+ # Check the 'info breakpoints' output, check there is no 'inf 1' at the
+ # end of the breakpoint line.
+ gdb_test "info breakpoint $bpnum" \
+ [multi_line \
+ "$bpnum\\s+breakpoint\\s+keep\\s+y\\s+<PENDING>\\s+foo" \
+ "\\s+breakpoint already hit 1 time"] \
+ "check info breakpoints while breakpoint is pending"
+}
+
+# Run all the tests.
+test_no_inf_display
--
2.25.4
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCHv6 06/10] gdb: parse pending breakpoint thread/task immediately
2023-10-30 16:11 ` [PATCHv6 00/10] thread-specific breakpoints in just some inferiors Andrew Burgess
` (4 preceding siblings ...)
2023-10-30 16:11 ` [PATCHv6 05/10] gdb: don't display inferior list for pending breakpoints Andrew Burgess
@ 2023-10-30 16:11 ` Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 07/10] gdb: don't set breakpoint::pspace for in create_breakpoint Andrew Burgess
` (3 subsequent siblings)
9 siblings, 0 replies; 12+ messages in thread
From: Andrew Burgess @ 2023-10-30 16:11 UTC (permalink / raw)
To: gdb-patches; +Cc: Andrew Burgess, Eli Zaretskii
The initial motivation for this commit was to allow thread or inferior
specific breakpoints to only be inserted within the appropriate
inferior's program-space. The benefit of this is that inferiors for
which the breakpoint does not apply will no longer need to stop, and
then resume, for such breakpoints. This commit does not make this
change, but is a refactor to allow this to happen in a later commit.
The problem we currently have is that when a thread-specific (or
inferior-specific) breakpoint is created, the thread (or inferior)
number is only parsed by calling find_condition_and_thread_for_sals.
This function is only called for non-pending breakpoints, and requires
that we know the locations at which the breakpoint will be placed (for
expression checking in case the breakpoint is also conditional).
A consequence of this is that by the time we figure out the breakpoint
is thread-specific we have already looked up locations in all program
spaces. This feels wasteful -- if we knew the thread-id earlier then
we could reduce the work GDB does by only looking up locations within
the program space for which the breakpoint applies.
Another consequence of how find_condition_and_thread_for_sals is
called is that pending breakpoints don't currently know they are
thread-specific, nor even that they are conditional! Additionally, by
delaying parsing the thread-id, pending breakpoints can be created for
non-existent threads, this is different to how non-pending
breakpoints are handled, so I can do this:
$ gdb -q ./gdb/testsuite/outputs/gdb.multi/pending-bp/pending-bp
Reading symbols from ./gdb/testsuite/outputs/gdb.multi/pending-bp/pending-bp...
(gdb) break foo thread 99
Function "foo" not defined.
Make breakpoint pending on future shared library load? (y or [n]) y
Breakpoint 1 (foo thread 99) pending.
(gdb) r
Starting program: /tmp/gdb/testsuite/outputs/gdb.multi/pending-bp/pending-bp
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Error in re-setting breakpoint 1: Unknown thread 99.
[Inferior 1 (process 3329749) exited normally]
(gdb)
GDB only checked the validity of 'thread 99' at the point the 'foo'
location became non-pending. In contrast, if I try this:
$ gdb -q ./gdb/testsuite/outputs/gdb.multi/pending-bp/pending-bp
Reading symbols from ./gdb/testsuite/outputs/gdb.multi/pending-bp/pending-bp...
(gdb) break main thread 99
Unknown thread 99.
(gdb)
GDB immediately checks if 'thread 99' exists. I think inconsistencies
like this are confusing, and should be fixed if possible.
In this commit the create_breakpoint function is updated so that the
extra_string, which contains the thread, inferior, task, and/or
condition information, is parsed immediately, even for pending
breakpoints.
Obviously, the condition still can't be validated until the breakpoint
becomes non-pending, but the thread, inferior, and task information
can be pulled from the extra-string, and can be validated early on,
even for pending breakpoints. The -force-condition flag is also
parsed as part of this early parsing change.
There are a couple of benefits to doing this:
1. Printing of breakpoints is more consistent now. Consider creating
a conditional breakpoint before this commit:
(gdb) set breakpoint pending on
(gdb) break pendingfunc if (0)
Function "pendingfunc" not defined.
Breakpoint 1 (pendingfunc if (0)) pending.
(gdb) break main if (0)
Breakpoint 2 at 0x401198: file /tmp/hello.c, line 18.
(gdb) info breakpoints
Num Type Disp Enb Address What
1 breakpoint keep y <PENDING> pendingfunc if (0)
2 breakpoint keep y 0x0000000000401198 in main at /tmp/hello.c:18
stop only if (0)
(gdb)
And after this commit:
(gdb) set breakpoint pending on
(gdb) break pendingfunc if (0)
Function "pendingfunc" not defined.
Breakpoint 1 (pendingfunc) pending.
(gdb) break main if (0)
Breakpoint 2 at 0x401198: file /home/andrew/tmp/hello.c, line 18.
(gdb) info breakpoints
Num Type Disp Enb Address What
1 breakpoint keep y <PENDING> pendingfunc
stop only if (0)
2 breakpoint keep y 0x0000000000401198 in main at /home/andrew/tmp/hello.c:18
stop only if (0)
(gdb)
Notice that the display of the condition is now the same for the
pending and non-pending breakpoints.
The same is true for the thread, inferior, or task information in
thread, inferior, or task specific breakpoints; this information is
displayed on its own line rather than being part of the 'What'
field.
2. We can check that the thread exists as soon as the pending
breakpoint is created. Currently there is a weird difference
between pending and non-pending breakpoints when creating a
thread-specific breakpoint.
A pending thread-specific breakpoint only checks its thread when it
becomes non-pending, at which point the thread the breakpoint was
intended for might have exited. Here's the behaviour before this
commit:
(gdb) set breakpoint pending on
(gdb) break foo thread 2
Function "foo" not defined.
Breakpoint 2 (foo thread 2) pending.
(gdb) c
Continuing.
[Thread 0x7ffff7c56700 (LWP 2948835) exited]
Error in re-setting breakpoint 2: Unknown thread 2.
[Inferior 1 (process 2948832) exited normally]
(gdb)
Notice the 'Error in re-setting breakpoint 2: Unknown thread 2.'
line, this was triggered when GDB tried to make the breakpoint
non-pending, and GDB discovers that the thread no longer exists.
Compare that to the behaviour after this commit:
(gdb) set breakpoint pending on
(gdb) break foo thread 2
Function "foo" not defined.
Breakpoint 2 (foo) pending.
(gdb) c
Continuing.
[Thread 0x7ffff7c56700 (LWP 2949243) exited]
Thread-specific breakpoint 2 deleted - thread 2 no longer in the thread list.
[Inferior 1 (process 2949240) exited normally]
(gdb)
Now the behaviour for pending breakpoints is identical to
non-pending breakpoints, the thread specific breakpoint is removed
as soon as the thread the breakpoint is associated with exits.
There is an additional change; when the pending breakpoint is
created prior to this patch we see this line:
Breakpoint 2 (foo thread 2) pending.
While after this patch we get this line:
Breakpoint 2 (foo) pending.
Notice that 'thread 2' has disappeared. This might look like a
regression, but I don't think it is. That we said 'thread 2'
before was just a consequence of the lazy parsing of the breakpoint
specification, while with this patch GDB understands, and has
parsed away the 'thread 2' bit of the spec. If folk think the old
information was useful then this would be trivial to add back in
code_breakpoint::say_where.
As a result of this commit the breakpoints 'extra_string' field is now
only used by bp_dprintf type breakpoints to hold the printf format and
arguments. This string should always be empty for other breakpoint
types. This allows me to clean up some code in
print_breakpoint_location.
In code_breakpoint::code_breakpoint I'm able to change an error case
into an assert. This is because this error is now handled earlier in
create_breakpoint. As a result we know that by this point, the
extra_string will always be nullptr for anything other than a
bp_dprintf style breakpoint.
The find_condition_and_thread_for_sals function is now no longer
needed, this was previously doing the delayed splitting of the extra
string into thread, task, and condition, but this is now all done in
create_breakpoint, so find_condition_and_thread_for_sals can be
deleted, and the code that calls this in
code_breakpoint::location_spec_to_sals can be removed. With this
update this code would only ever be reached for bp_dprintf style
breakpoints, and in these cases the extra_string should not contain
anything other than format and args.
The most interesting changes are all in create_breakpoint and in the
new file break-cond-parse.c. We have a new block of code early on in
create_breakpoint that is responsible for splitting the extra_string
into its component parts by calling create_breakpoint_parse_arg_string
a function in the new break-cond-parse.c file. This means that some
of the later code can be simplified a little.
The new break-cond-parse.c file implements the splitting up the
extra_string and finding all the parts, as well as some self-tests for
the new function.
Finally, now we know all the details, these can be stored within the
breakpoint object if we end up creating a deferred breakpoint.
Additionally, if we are creating a deferred bp_dprintf we can parse
the extra_string to build the printf command.
The implementation here aims to maintain backwards compatibility as
much as possible, this means that:
1. We support abbreviations of 'thread', 'task', and 'inferior' in
some places on the breakpoint line. The handling of abbreviations
has (before this patch) been a little weird, so this works:
(gdb) break *main th 1
And creates a breakpoint at '*main' for thread 1 only, while this
does not work:
(gdb) break main th 1
In this case GDB will try to find the symbol 'main th 1'. This
weirdness exists before and after this patch.
2. The handling of '-force-condition' is odd, if this flag appears
immediately after a condition then it will be treated as part of the
condition, e.g.:
(gdb) break main if 0 -force-condition
No symbol "force" in current context.
But we are fine with these alternatives:
(gdb) break main if 0 thread 1 -force-condition
(gdb) break main -force-condition if 0
Again, this is just a quirk of how the breakpoint line used to be
parsed, but I've chosen to maintain this for backward
compatibility. Maybe in the future we might wish to consider
changing this behaviour, but I'd rather do that as a separate commit
later on, if that was of interest to people.
Reviewed-By: Eli Zaretskii <eliz@gnu.org>
---
gdb/Makefile.in | 2 +
gdb/NEWS | 4 +
gdb/break-cond-parse.c | 463 ++++++++++++++++++
gdb/break-cond-parse.h | 49 ++
gdb/breakpoint.c | 372 ++++----------
gdb/testsuite/gdb.ada/tasks.exp | 6 +-
gdb/testsuite/gdb.base/condbreak.exp | 57 ++-
gdb/testsuite/gdb.base/pending.exp | 23 +-
gdb/testsuite/gdb.linespec/explicit.exp | 4 +-
gdb/testsuite/gdb.mi/mi-dprintf-pending.exp | 3 +-
.../gdb.multi/inferior-specific-bp.exp | 4 +-
.../gdb.threads/del-pending-thread-bp-lib.c | 22 +
.../gdb.threads/del-pending-thread-bp.c | 85 ++++
.../gdb.threads/del-pending-thread-bp.exp | 108 ++++
14 files changed, 900 insertions(+), 302 deletions(-)
create mode 100644 gdb/break-cond-parse.c
create mode 100644 gdb/break-cond-parse.h
create mode 100644 gdb/testsuite/gdb.threads/del-pending-thread-bp-lib.c
create mode 100644 gdb/testsuite/gdb.threads/del-pending-thread-bp.c
create mode 100644 gdb/testsuite/gdb.threads/del-pending-thread-bp.exp
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 9c0a0bff2cd..3b78d4cbe9c 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -1027,6 +1027,7 @@ COMMON_SFILES = \
break-catch-sig.c \
break-catch-syscall.c \
break-catch-throw.c \
+ break-cond-parse.c \
breakpoint.c \
bt-utils.c \
btrace.c \
@@ -1294,6 +1295,7 @@ HFILES_NO_SRCDIR = \
bfd-target.h \
bfin-tdep.h \
block.h \
+ break-cond-parse.h \
breakpoint.h \
bsd-kvm.h \
bsd-uthread.h \
diff --git a/gdb/NEWS b/gdb/NEWS
index 6022def1037..22230d70d08 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -6,6 +6,10 @@
* GDB index now contains information about the main function. This speeds up
startup when it is being used for some large binaries.
+* For breakpoints that are created in the 'pending' state, any
+ 'thread' or 'task' keywords are parsed at the time the breakpoint is
+ created, rather than at the time the breakpoint becomes non-pending.
+
* Python API
** New function gdb.notify_mi(NAME, DATA), that emits custom
diff --git a/gdb/break-cond-parse.c b/gdb/break-cond-parse.c
new file mode 100644
index 00000000000..865e1ad0d61
--- /dev/null
+++ b/gdb/break-cond-parse.c
@@ -0,0 +1,463 @@
+/* Copyright (C) 2023 Free Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include "defs.h"
+#include "gdbsupport/gdb_assert.h"
+#include "gdbsupport/selftest.h"
+#include "test-target.h"
+#include "scoped-mock-context.h"
+#include "break-cond-parse.h"
+#include "tid-parse.h"
+#include "ada-lang.h"
+
+/* When parsing tokens from a string, which direction are we parsing?
+
+ Given the following string and pointer 'ptr':
+
+ ABC DEF GHI JKL
+ ^
+ ptr
+
+ Parsing 'forward' will return the token 'GHI' and update 'ptr' to point
+ between GHI and JKL. Parsing 'backward' will return the token 'DEF' and
+ update 'ptr' to point between ABC and DEF.
+*/
+
+enum class parse_direction
+{
+ /* Parse the next token forwards. */
+ forward,
+
+ /* Parse the previous token backwards. */
+ backward
+};
+
+struct token
+{
+ /* Create a new token. START points to the first character of the new
+ token, while END points at the last character of the new token.
+
+ Neither START or END can be nullptr, and both START and END must point
+ into the same C style string (i.e. there should be no null character
+ between START and END). END must be equal to, or greater than START,
+ that is, it is not possible to create a zero length token. */
+
+ token (const char *start, const char *end)
+ : m_start (start),
+ m_end (end)
+ {
+ gdb_assert (m_end >= m_start);
+ gdb_assert (m_start + strlen (m_start) > m_end);
+ }
+
+ /* Return a pointer to the first character of this token. */
+ const char *start () const
+ {
+ return m_start;
+ }
+
+ /* Return a pointer to the last character of this token. */
+ const char *end () const
+ {
+ return m_end;
+ }
+
+ /* Return the length of the token. */
+ size_t length () const
+ {
+ /* The + 1 is because the character at m_end is part of the token. */
+ return m_end - m_start + 1;
+ }
+
+ /* Return true if this token matches STR. */
+ bool matches (const char *str) const
+ {
+ return strncmp (m_start, str, length ()) == 0;
+ }
+
+private:
+ /* The first character of this token. */
+ const char *m_start;
+
+ /* The last character of this token. */
+ const char *m_end;
+};
+
+/* Find the next token in DIRECTION from *CURR. */
+
+static token
+find_next_token (const char **curr, parse_direction direction)
+{
+ const char *tok_start, *tok_end;
+
+ gdb_assert (**curr != '\0');
+
+ if (direction == parse_direction::forward)
+ {
+ *curr = skip_spaces (*curr);
+ tok_start = *curr;
+ *curr = skip_to_space (*curr);
+ tok_end = *curr - 1;
+ }
+ else
+ {
+ gdb_assert (direction == parse_direction::backward);
+
+ while (isspace (**curr))
+ --(*curr);
+
+ tok_end = *curr;
+
+ while (!isspace (**curr))
+ --(*curr);
+
+ tok_start = (*curr) + 1;
+ }
+
+ return token (tok_start, tok_end);
+}
+
+/* See break-cond-parse.h. */
+
+void
+create_breakpoint_parse_arg_string
+ (const char *tok, gdb::unique_xmalloc_ptr<char> *cond_string,
+ int *thread, int *inferior, int *task,
+ gdb::unique_xmalloc_ptr<char> *rest, bool *force)
+{
+ /* Set up the defaults. */
+ cond_string->reset ();
+ rest->reset ();
+ *thread = -1;
+ *inferior = -1;
+ *task = -1;
+ *force = false;
+
+ if (tok == nullptr)
+ return;
+
+ /* The "-force-condition" flag gets some special treatment. If this
+ token is immediately after the condition string then we treat this as
+ part of the condition string rather than a separate token. This is
+ just a quirk of how this token used to be parsed, and has been
+ retained for backwards compatibility. Maybe this should be updated
+ in the future. */
+ gdb::optional<token> force_condition_token;
+
+ const char *cond_start = nullptr;
+ const char *cond_end = nullptr;
+ parse_direction direction = parse_direction::forward;
+ while (*tok != '\0')
+ {
+ /* Find the next token. If moving backward and this token starts at
+ the same location as the condition then we must have found the
+ other end of the condition string -- we're done. */
+ token t = find_next_token (&tok, direction);
+ if (direction == parse_direction::backward && t.start () <= cond_start)
+ {
+ cond_end = t.end ();
+ break;
+ }
+
+ /* We only have a single flag option to check for. All the other
+ options take a value so require an additional token to be found.
+ Additionally, we require that this flag be at least '-f', we
+ don't allow it to be abbreviated to '-'. */
+ if (t.length () > 1 && t.matches ("-force-condition"))
+ {
+ force_condition_token.emplace (t);
+ continue;
+ }
+
+ /* Maybe the first token was the last token in the string. If this
+ is the case then we definitely can't try to extract a value
+ token. This also means that the token T is meaningless. Reset
+ TOK to point at the start of the unknown content and break out of
+ the loop. We'll record the unknown part of the string outside of
+ the scanning loop (below). */
+ if (direction == parse_direction::forward && *tok == '\0')
+ {
+ tok = t.start ();
+ break;
+ }
+
+ /* As before, find the next token and, if we are scanning backwards,
+ check that we have not reached the start of the condition string. */
+ token v = find_next_token (&tok, direction);
+ if (direction == parse_direction::backward && v.start () <= cond_start)
+ {
+ /* Use token T here as that must also be part of the condition
+ string. */
+ cond_end = t.end ();
+ break;
+ }
+
+ /* When moving backward we will first parse the value token then the
+ keyword token, so swap them now. */
+ if (direction == parse_direction::backward)
+ std::swap (t, v);
+
+ /* Check for valid option in token T. If we find a valid option then
+ parse the value from the token V. Except for 'if', that's handled
+ differently.
+
+ For the 'if' token we need to capture the entire condition
+ string, so record the start of the condition string and then
+ start scanning backwards looking for the end of the condition
+ string.
+
+ The order of these checks is important, at least the check for
+ 'thread' must occur before the check for 'task'. We accept
+ abbreviations of these token names, and 't' should resolve to
+ 'thread', which will only happen if we check 'thread' first. */
+ if (direction == parse_direction::forward && t.matches ("if"))
+ {
+ cond_start = v.start ();
+ tok = tok + strlen (tok);
+ gdb_assert (*tok == '\0');
+ --tok;
+ direction = parse_direction::backward;
+ continue;
+ }
+ else if (t.matches ("thread"))
+ {
+ if (*thread != -1)
+ error(_("You can specify only one thread."));
+
+ if (*task != -1 || *inferior != -1)
+ error (_("You can specify only one of thread, inferior, or task."));
+
+ const char *tmptok;
+ thread_info *thr = parse_thread_id (v.start (), &tmptok);
+ const char *expected_end = skip_spaces (v.end () + 1);
+ if (tmptok != expected_end)
+ error (_("Junk after thread keyword."));
+ *thread = thr->global_num;
+ }
+ else if (t.matches ("inferior"))
+ {
+ if (*inferior != -1)
+ error(_("You can specify only one inferior."));
+
+ if (*task != -1 || *thread != -1)
+ error (_("You can specify only one of thread, inferior, or task."));
+
+ char *tmptok;
+ *inferior = strtol (v.start (), &tmptok, 0);
+ const char *expected_end = v.end () + 1;
+ if (tmptok != expected_end)
+ error (_("Junk after inferior keyword."));
+ }
+ else if (t.matches ("task"))
+ {
+ if (*task != -1)
+ error(_("You can specify only one task."));
+
+ if (*thread != -1 || *inferior != -1)
+ error (_("You can specify only one of thread, inferior, or task."));
+
+ char *tmptok;
+ *task = strtol (v.start (), &tmptok, 0);
+ const char *expected_end = v.end () + 1;
+ if (tmptok != expected_end)
+ error (_("Junk after task keyword."));
+ if (!valid_task_id (*task))
+ error (_("Unknown task %d."), *task);
+ }
+ else
+ {
+ /* An unknown token. If we are scanning forward then reset TOK
+ to point at the start of the unknown content, we record this
+ outside of the scanning loop (below).
+
+ If we are scanning backward then unknown content is assumed to
+ be the other end of the condition string, obviously, this is
+ just a heuristic, we could be looking at a mistyped command
+ line, but this will be spotted when the condition is
+ eventually evaluated.
+
+ Either way, no more scanning is required after this. */
+ if (direction == parse_direction::forward)
+ tok = t.start ();
+ else
+ {
+ gdb_assert (direction == parse_direction::backward);
+ cond_end = v.end ();
+ }
+ break;
+ }
+ }
+
+ if (cond_start != nullptr)
+ {
+ /* If we found the start of a condition string then we should have
+ switched to backward scan mode, and found the end of the condition
+ string. Capture the whole condition string into COND_STRING
+ now. */
+ gdb_assert (direction == parse_direction::backward);
+ gdb_assert (cond_end != nullptr);
+
+ /* If the first token after the condition string is the
+ "-force-condition" token, then we merge the "-force-condition"
+ token with the condition string and forget ever seeing the
+ "-force-condition". */
+ if (force_condition_token.has_value ())
+ {
+ const char *next_token_start = skip_spaces (cond_end + 1);
+
+ if (next_token_start == force_condition_token->start ())
+ {
+ cond_end = force_condition_token->end ();
+ force_condition_token.reset ();
+ }
+ }
+
+ /* The '+ 1' here is because COND_END points to the last character of
+ the condition string rather than the null-character at the end of
+ the condition string, and we need the string length here. */
+ cond_string->reset (savestring (cond_start, cond_end - cond_start + 1));
+ }
+ else if (*tok != '\0')
+ {
+ /* If we didn't have a condition start pointer then we should still
+ be in forward scanning mode. If we didn't reach the end of the
+ input string (TOK is not at the null character) then the rest of
+ the input string is garbage that we didn't understand.
+
+ Record the unknown content into REST. The caller of this function
+ will report this as an error later on. We could report the error
+ here, but we prefer to allow the caller to run other checks, and
+ prioritise other errors before reporting this problem. */
+ gdb_assert (direction == parse_direction::forward);
+ gdb_assert (cond_end == nullptr);
+ rest->reset (savestring (tok, strlen (tok)));
+ }
+
+ /* If we saw "-force-condition" then set the *FORCE flag. Depending on
+ which path we took above we might have chosen to forget having seen
+ the "-force-condition" token. */
+ if (force_condition_token.has_value ())
+ *force = true;
+}
+
+#if GDB_SELF_TEST
+
+namespace selftests {
+
+/* Run a single test of the create_breakpoint_parse_arg_string function.
+ INPUT is passed to create_breakpoint_parse_arg_string while all other
+ arguments are the expected output from
+ create_breakpoint_parse_arg_string. */
+
+static void
+test (const char *input, const char *condition, int thread = -1,
+ int inferior = -1, int task = -1, bool force = false,
+ const char *rest = nullptr)
+{
+ gdb::unique_xmalloc_ptr<char> extracted_condition;
+ gdb::unique_xmalloc_ptr<char> extracted_rest;
+ int extracted_thread, extracted_inferior, extracted_task;
+ bool extracted_force_condition;
+ std::string exception_msg;
+
+ try
+ {
+ create_breakpoint_parse_arg_string (input, &extracted_condition,
+ &extracted_thread,
+ &extracted_inferior,
+ &extracted_task, &extracted_rest,
+ &extracted_force_condition);
+ }
+ catch (const gdb_exception_error &ex)
+ {
+ string_file buf;
+
+ exception_print (&buf, ex);
+ exception_msg = buf.release ();
+ }
+
+ if ((condition == nullptr) != (extracted_condition.get () == nullptr)
+ || (condition != nullptr
+ && strcmp (condition, extracted_condition.get ()) != 0)
+ || (rest == nullptr) != (extracted_rest.get () == nullptr)
+ || (rest != nullptr && strcmp (rest, extracted_rest.get ()) != 0)
+ || thread != extracted_thread
+ || inferior != extracted_inferior
+ || task != extracted_task
+ || force != extracted_force_condition
+ || !exception_msg.empty ())
+ {
+ if (run_verbose ())
+ {
+ debug_printf ("input: '%s'\n", input);
+ debug_printf ("condition: '%s'\n", extracted_condition.get ());
+ debug_printf ("rest: '%s'\n", extracted_rest.get ());
+ debug_printf ("thread: %d\n", extracted_thread);
+ debug_printf ("inferior: %d\n", extracted_inferior);
+ debug_printf ("task: %d\n", extracted_task);
+ debug_printf ("forced: %s\n",
+ extracted_force_condition ? "true" : "false");
+ debug_printf ("exception: '%s'\n", exception_msg.c_str ());
+ }
+
+ /* Report the failure. */
+ SELF_CHECK (false);
+ }
+}
+
+/* Test the create_breakpoint_parse_arg_string function. Just wraps
+ multiple calls to the test function above. */
+
+static void
+create_breakpoint_parse_arg_string_tests (void)
+{
+ gdbarch *arch = current_inferior ()->arch ();
+ scoped_restore_current_pspace_and_thread restore;
+ scoped_mock_context<test_target_ops> mock_target (arch);
+
+ int global_thread_num = mock_target.mock_thread.global_num;
+
+ test (" if blah ", "blah");
+ test (" if blah thread 1", "blah", global_thread_num);
+ test (" if blah inferior 1", "blah", -1, 1);
+ test (" if blah thread 1 ", "blah", global_thread_num);
+ test ("thread 1 woof", nullptr, global_thread_num, -1, -1, false, "woof");
+ test ("thread 1 X", nullptr, global_thread_num, -1, -1, false, "X");
+ test (" if blah thread 1 -force-condition", "blah", global_thread_num,
+ -1, -1, true);
+ test (" -force-condition if blah thread 1", "blah", global_thread_num,
+ -1, -1, true);
+ test (" -force-condition if blah thread 1 ", "blah", global_thread_num,
+ -1, -1, true);
+ test ("thread 1 -force-condition if blah", "blah", global_thread_num,
+ -1, -1, true);
+ test ("if (A::outer::func ())", "(A::outer::func ())");
+}
+
+} // namespace selftests
+#endif /* GDB_SELF_TEST */
+
+void _initialize_break_cond_parse ();
+void
+_initialize_break_cond_parse ()
+{
+#if GDB_SELF_TEST
+ selftests::register_test
+ ("create_breakpoint_parse_arg_string",
+ selftests::create_breakpoint_parse_arg_string_tests);
+#endif
+}
diff --git a/gdb/break-cond-parse.h b/gdb/break-cond-parse.h
new file mode 100644
index 00000000000..b08b6fc6cc9
--- /dev/null
+++ b/gdb/break-cond-parse.h
@@ -0,0 +1,49 @@
+/* Copyright (C) 2023 Free Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#if !defined (BREAK_COND_PARSE_H)
+#define BREAK_COND_PARSE_H 1
+
+/* Given TOK, a string possibly containing a condition, thread, inferior,
+ task and force-condition flag, as accepted by the 'break' command,
+ extract the condition string, thread, inferior, task number, and the
+ force_condition flag, then set *COND_STRING, *THREAD, *INFERIOR, *TASK,
+ and *FORCE.
+
+ As TOK is parsed, if an unknown keyword is encountered before the 'if'
+ keyword then everything starting from the unknown keyword is placed into
+ *REST.
+
+ Both *COND and *REST are initialized to nullptr. If no 'if' keyword is
+ found then *COND will be returned as nullptr. If no unknown content is
+ found then *REST is returned as nullptr.
+
+ If no thread is found, *THREAD is set to -1. If no inferior is found,
+ *INFERIOR is set to -1. If no task is found, *TASK is set to -1. If
+ the -force-condition flag is not found then *FORCE is set to false.
+
+ Due to the free-form nature that the string TOK might take (a 'thread'
+ keyword can appear before or after an 'if' condition) then we end up
+ having to check for keywords from both the start of TOK and the end of
+ TOK. */
+
+extern void create_breakpoint_parse_arg_string
+ (const char *tok, gdb::unique_xmalloc_ptr<char> *cond_string,
+ int *thread, int *inferior, int *task,
+ gdb::unique_xmalloc_ptr<char> *rest, bool *force);
+
+#endif
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 34519b4e72a..3d8eab826bd 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -70,6 +70,7 @@
#include "cli/cli-style.h"
#include "cli/cli-decode.h"
#include <unordered_set>
+#include "break-cond-parse.h"
/* readline include files */
#include "readline/tilde.h"
@@ -6339,20 +6340,7 @@ print_breakpoint_location (const breakpoint *b, const bp_location *loc)
uiout->field_stream ("at", stb);
}
else
- {
- uiout->field_string ("pending", b->locspec->to_string ());
- /* If extra_string is available, it could be holding a condition
- or dprintf arguments. In either case, make sure it is printed,
- too, but only for non-MI streams. */
- if (!uiout->is_mi_like_p () && b->extra_string != NULL)
- {
- if (b->type == bp_dprintf)
- uiout->text (",");
- else
- uiout->text (" ");
- uiout->text (b->extra_string.get ());
- }
- }
+ uiout->field_string ("pending", b->locspec->to_string ());
if (loc && is_breakpoint (b)
&& breakpoint_condition_evaluation_mode () == condition_evaluation_target
@@ -8714,8 +8702,8 @@ code_breakpoint::code_breakpoint (struct gdbarch *gdbarch_,
gdb_assert (extra_string != nullptr);
update_dprintf_command_list (this);
}
- else if (extra_string != nullptr)
- error (_("Garbage '%s' at end of command"), extra_string.get ());
+ else
+ gdb_assert (extra_string == nullptr);
/* The order of the locations is now stable. Set the location
condition using the location's number. */
@@ -8943,197 +8931,6 @@ check_fast_tracepoint_sals (struct gdbarch *gdbarch,
}
}
-/* Given TOK, a string specification of condition and thread, as accepted
- by the 'break' command, extract the condition string into *COND_STRING.
- If no condition string is found then *COND_STRING is set to nullptr.
-
- If the breakpoint specification has an associated thread, task, or
- inferior, these are extracted into *THREAD, *TASK, and *INFERIOR
- respectively, otherwise these arguments are set to -1 (for THREAD and
- INFERIOR) or 0 (for TASK).
-
- PC identifies the context at which the condition should be parsed. */
-
-static void
-find_condition_and_thread (const char *tok, CORE_ADDR pc,
- gdb::unique_xmalloc_ptr<char> *cond_string,
- int *thread, int *inferior, int *task,
- gdb::unique_xmalloc_ptr<char> *rest)
-{
- cond_string->reset ();
- *thread = -1;
- *inferior = -1;
- *task = -1;
- rest->reset ();
- bool force = false;
-
- while (tok && *tok)
- {
- const char *end_tok;
- int toklen;
- const char *cond_start = NULL;
- const char *cond_end = NULL;
-
- tok = skip_spaces (tok);
-
- if ((*tok == '"' || *tok == ',') && rest)
- {
- rest->reset (savestring (tok, strlen (tok)));
- break;
- }
-
- end_tok = skip_to_space (tok);
-
- toklen = end_tok - tok;
-
- if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
- {
- tok = cond_start = end_tok + 1;
- try
- {
- parse_exp_1 (&tok, pc, block_for_pc (pc), 0);
- }
- catch (const gdb_exception_error &)
- {
- if (!force)
- throw;
- else
- tok = tok + strlen (tok);
- }
- cond_end = tok;
- cond_string->reset (savestring (cond_start, cond_end - cond_start));
- }
- else if (toklen >= 1 && strncmp (tok, "-force-condition", toklen) == 0)
- {
- tok = tok + toklen;
- force = true;
- }
- else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0)
- {
- const char *tmptok;
- struct thread_info *thr;
-
- if (*thread != -1)
- error(_("You can specify only one thread."));
-
- if (*task != -1)
- error (_("You can specify only one of thread or task."));
-
- if (*inferior != -1)
- error (_("You can specify only one of inferior or thread."));
-
- tok = end_tok + 1;
- thr = parse_thread_id (tok, &tmptok);
- if (tok == tmptok)
- error (_("Junk after thread keyword."));
- *thread = thr->global_num;
- tok = tmptok;
- }
- else if (toklen >= 1 && strncmp (tok, "inferior", toklen) == 0)
- {
- if (*inferior != -1)
- error(_("You can specify only one inferior."));
-
- if (*task != -1)
- error (_("You can specify only one of inferior or task."));
-
- if (*thread != -1)
- error (_("You can specify only one of inferior or thread."));
-
- char *tmptok;
- tok = end_tok + 1;
- *inferior = strtol (tok, &tmptok, 0);
- if (tok == tmptok)
- error (_("Junk after inferior keyword."));
- if (!valid_global_inferior_id (*inferior))
- error (_("Unknown inferior number %d."), *inferior);
- tok = tmptok;
- }
- else if (toklen >= 1 && strncmp (tok, "task", toklen) == 0)
- {
- char *tmptok;
-
- if (*task != -1)
- error(_("You can specify only one task."));
-
- if (*thread != -1)
- error (_("You can specify only one of thread or task."));
-
- if (*inferior != -1)
- error (_("You can specify only one of inferior or task."));
-
- tok = end_tok + 1;
- *task = strtol (tok, &tmptok, 0);
- if (tok == tmptok)
- error (_("Junk after task keyword."));
- if (!valid_task_id (*task))
- error (_("Unknown task %d."), *task);
- tok = tmptok;
- }
- else if (rest)
- {
- rest->reset (savestring (tok, strlen (tok)));
- break;
- }
- else
- error (_("Junk at end of arguments."));
- }
-}
-
-/* Call 'find_condition_and_thread' for each sal in SALS until a parse
- succeeds. The parsed values are written to COND_STRING, THREAD,
- TASK, and REST. See the comment of 'find_condition_and_thread'
- for the description of these parameters and INPUT. */
-
-static void
-find_condition_and_thread_for_sals (const std::vector<symtab_and_line> &sals,
- const char *input,
- gdb::unique_xmalloc_ptr<char> *cond_string,
- int *thread, int *inferior, int *task,
- gdb::unique_xmalloc_ptr<char> *rest)
-{
- int num_failures = 0;
- for (auto &sal : sals)
- {
- gdb::unique_xmalloc_ptr<char> cond;
- int thread_id = -1;
- int inferior_id = -1;
- int task_id = -1;
- gdb::unique_xmalloc_ptr<char> remaining;
-
- /* Here we want to parse 'arg' to separate condition from thread
- number. But because parsing happens in a context and the
- contexts of sals might be different, try each until there is
- success. Finding one successful parse is sufficient for our
- goal. When setting the breakpoint we'll re-parse the
- condition in the context of each sal. */
- try
- {
- find_condition_and_thread (input, sal.pc, &cond, &thread_id,
- &inferior_id, &task_id, &remaining);
- *cond_string = std::move (cond);
- /* A value of -1 indicates that these fields are unset. At most
- one of these fields should be set (to a value other than -1)
- at this point. */
- gdb_assert (((thread_id == -1 ? 1 : 0)
- + (task_id == -1 ? 1 : 0)
- + (inferior_id == -1 ? 1 : 0)) >= 2);
- *thread = thread_id;
- *inferior = inferior_id;
- *task = task_id;
- *rest = std::move (remaining);
- break;
- }
- catch (const gdb_exception_error &e)
- {
- num_failures++;
- /* If no sal remains, do not continue. */
- if (num_failures == sals.size ())
- throw;
- }
- }
-}
-
/* Decode a static tracepoint marker spec. */
static std::vector<symtab_and_line>
@@ -9251,6 +9048,46 @@ create_breakpoint (struct gdbarch *gdbarch,
|| (type_wanted != bp_dprintf
&& (extra_string == nullptr || parse_extra)));
+ /* Will hold either copies of the similarly named function argument, or
+ will hold a modified version of the function argument, depending on
+ the value of PARSE_EXTRA. */
+ gdb::unique_xmalloc_ptr<char> cond_string_copy;
+ gdb::unique_xmalloc_ptr<char> extra_string_copy;
+
+ if (parse_extra)
+ {
+ /* Parse EXTRA_STRING splitting the parts out. */
+ create_breakpoint_parse_arg_string (extra_string, &cond_string_copy,
+ &thread, &inferior, &task,
+ &extra_string_copy,
+ &force_condition);
+
+ /* We could check that EXTRA_STRING_COPY is empty at this point -- it
+ should be, as we only get here for things that are not bp_dprintf,
+ however, we prefer to give the location spec parser a chance to
+ run first, this means the user will get errors about invalid
+ location spec instead of an error about garbage at the end of the
+ command line.
+
+ We still do the EXTRA_STRING_COPY is empty check, just later in
+ this function. */
+
+ gdb_assert (thread == -1 || thread > 0);
+ gdb_assert (task == -1 || task > 0);
+ gdb_assert (inferior == -1 || inferior > 0);
+ }
+ else
+ {
+ if (cond_string != nullptr)
+ cond_string_copy.reset (xstrdup (cond_string));
+ if (extra_string != nullptr)
+ extra_string_copy.reset (xstrdup (extra_string));
+ }
+
+ /* Clear these. Updated values are now held in the *_copy locals. */
+ cond_string = nullptr;
+ extra_string = nullptr;
+
try
{
ops->create_sals_from_location_spec (locspec, &canonical);
@@ -9286,6 +9123,13 @@ create_breakpoint (struct gdbarch *gdbarch,
throw;
}
+ /* The only bp_dprintf should have anything in EXTRA_STRING_COPY by this
+ point. For all other breakpoints this indicates an error. We could
+ place this check earlier in the function, but we prefer to see errors
+ from the location spec parser before we see this error message. */
+ if (type_wanted != bp_dprintf && extra_string_copy.get () != nullptr)
+ error (_("Garbage '%s' at end of command"), extra_string_copy.get ());
+
if (!pending && canonical.lsals.empty ())
return 0;
@@ -9309,63 +9153,31 @@ create_breakpoint (struct gdbarch *gdbarch,
breakpoint. */
if (!pending)
{
- gdb::unique_xmalloc_ptr<char> cond_string_copy;
- gdb::unique_xmalloc_ptr<char> extra_string_copy;
-
- if (parse_extra)
+ /* Check the validity of the condition. We should error out if the
+ condition is invalid at all of the locations and if it is not
+ forced. In the PARSE_EXTRA case above, this check is done when
+ parsing the EXTRA_STRING. */
+ if (cond_string_copy.get () != nullptr && !force_condition)
{
- gdb_assert (type_wanted != bp_dprintf);
-
- gdb::unique_xmalloc_ptr<char> rest;
- gdb::unique_xmalloc_ptr<char> cond;
-
+ int num_failures = 0;
const linespec_sals &lsal = canonical.lsals[0];
-
- find_condition_and_thread_for_sals (lsal.sals, extra_string,
- &cond, &thread, &inferior,
- &task, &rest);
-
- if (rest.get () != nullptr && *(rest.get ()) != '\0')
- error (_("Garbage '%s' at end of command"), rest.get ());
-
- cond_string_copy = std::move (cond);
- extra_string_copy = std::move (rest);
- }
- else
- {
- /* Check the validity of the condition. We should error out
- if the condition is invalid at all of the locations and
- if it is not forced. In the PARSE_EXTRA case above, this
- check is done when parsing the EXTRA_STRING. */
- if (cond_string != nullptr && !force_condition)
+ for (const auto &sal : lsal.sals)
{
- int num_failures = 0;
- const linespec_sals &lsal = canonical.lsals[0];
- for (const auto &sal : lsal.sals)
+ const char *cond = cond_string_copy.get ();
+ try
{
- const char *cond = cond_string;
- try
- {
- parse_exp_1 (&cond, sal.pc, block_for_pc (sal.pc), 0);
- /* One success is sufficient to keep going. */
- break;
- }
- catch (const gdb_exception_error &)
- {
- num_failures++;
- /* If this is the last sal, error out. */
- if (num_failures == lsal.sals.size ())
- throw;
- }
+ parse_exp_1 (&cond, sal.pc, block_for_pc (sal.pc), 0);
+ /* One success is sufficient to keep going. */
+ break;
+ }
+ catch (const gdb_exception_error &)
+ {
+ num_failures++;
+ /* If this is the last sal, error out. */
+ if (num_failures == lsal.sals.size ())
+ throw;
}
}
-
- /* Create a private copy of condition string. */
- if (cond_string)
- cond_string_copy.reset (xstrdup (cond_string));
- /* Create a private copy of any extra string. */
- if (extra_string)
- extra_string_copy.reset (xstrdup (extra_string));
}
ops->create_breakpoints_sal (gdbarch, &canonical,
@@ -9382,21 +9194,16 @@ create_breakpoint (struct gdbarch *gdbarch,
type_wanted);
b->locspec = locspec->clone ();
- if (parse_extra)
- b->cond_string = NULL;
- else
- {
- /* Create a private copy of condition string. */
- b->cond_string.reset (cond_string != NULL
- ? xstrdup (cond_string)
- : NULL);
- b->thread = thread;
- }
+ /* Create a private copy of the condition string. */
+ b->cond_string = std::move (cond_string_copy);
+
+ b->thread = thread;
+ b->task = task;
+ b->inferior = inferior;
/* Create a private copy of any extra string. */
- b->extra_string.reset (extra_string != NULL
- ? xstrdup (extra_string)
- : NULL);
+ b->extra_string = std::move (extra_string_copy);
+
b->ignore_count = ignore_count;
b->disposition = tempflag ? disp_del : disp_donttouch;
b->condition_not_parsed = 1;
@@ -9405,9 +9212,12 @@ create_breakpoint (struct gdbarch *gdbarch,
&& type_wanted != bp_hardware_breakpoint) || thread != -1)
b->pspace = current_program_space;
+ if (b->type == bp_dprintf)
+ update_dprintf_command_list (b.get ());
+
install_breakpoint (internal, std::move (b), 0);
}
-
+
if (canonical.lsals.size () > 1)
{
warning (_("Multiple breakpoints were set.\nUse the "
@@ -13154,24 +12964,6 @@ code_breakpoint::location_spec_to_sals (location_spec *locspec,
{
for (auto &sal : sals)
resolve_sal_pc (&sal);
- if (condition_not_parsed && extra_string != NULL)
- {
- gdb::unique_xmalloc_ptr<char> local_cond, local_extra;
- int local_thread, local_task, local_inferior;
-
- find_condition_and_thread_for_sals (sals, extra_string.get (),
- &local_cond, &local_thread,
- &local_inferior,
- &local_task, &local_extra);
- gdb_assert (cond_string == nullptr);
- if (local_cond != nullptr)
- cond_string = std::move (local_cond);
- thread = local_thread;
- task = local_task;
- if (local_extra != nullptr)
- extra_string = std::move (local_extra);
- condition_not_parsed = 0;
- }
if (type == bp_static_tracepoint)
{
diff --git a/gdb/testsuite/gdb.ada/tasks.exp b/gdb/testsuite/gdb.ada/tasks.exp
index 603d43f7c36..337ee1b6f07 100644
--- a/gdb/testsuite/gdb.ada/tasks.exp
+++ b/gdb/testsuite/gdb.ada/tasks.exp
@@ -55,11 +55,11 @@ gdb_test "watch j task 1 task 3" "You can specify only one task\\."
# Check that attempting to combine 'task' and 'thread' gives an error.
gdb_test "break break_me task 1 thread 1" \
- "You can specify only one of thread or task\\."
+ "You can specify only one of thread, inferior, or task\\."
gdb_test "break break_me thread 1 task 1" \
- "You can specify only one of thread or task\\."
+ "You can specify only one of thread, inferior, or task\\."
gdb_test "break break_me inferior 1 task 1" \
- "You can specify only one of inferior or task\\."
+ "You can specify only one of thread, inferior, or task\\."
gdb_test "watch j task 1 thread 1" \
"You can specify only one of thread or task\\."
gdb_test "watch j thread 1 task 1" \
diff --git a/gdb/testsuite/gdb.base/condbreak.exp b/gdb/testsuite/gdb.base/condbreak.exp
index a5b2a28701b..5a6a42e073b 100644
--- a/gdb/testsuite/gdb.base/condbreak.exp
+++ b/gdb/testsuite/gdb.base/condbreak.exp
@@ -179,6 +179,10 @@ gdb_test "break -q main if (1==1) thread 999" \
"Unknown thread 999\\."
gdb_test "break -q main thread 999 if (1==1)" \
"Unknown thread 999\\."
+gdb_test "break -q main if (1==1) thread 999 -force-condition" \
+ "Unknown thread 999\\."
+gdb_test "break -q main thread 999 if (1==1) -force-condition" \
+ "Unknown thread 999\\."
# Verify that both if and thread can be distinguished from a breakpoint
# address expression.
@@ -186,20 +190,71 @@ gdb_test "break *main if (1==1) thread 999" \
"Unknown thread 999\\."
gdb_test "break *main thread 999 if (1==1)" \
"Unknown thread 999\\."
+gdb_test "break *main if (1==1) thread 999 -force-condition" \
+ "Unknown thread 999\\."
+gdb_test "break *main thread 999 if (1==1) -force-condition" \
+ "Unknown thread 999\\."
# Similarly for task.
gdb_test "break *main if (1==1) task 999" \
"Unknown task 999\\."
gdb_test "break *main task 999 if (1==1)" \
"Unknown task 999\\."
+gdb_test "break *main if (1==1) task 999 -force-condition" \
+ "Unknown task 999\\."
+gdb_test "break *main task 999 if (1==1) -force-condition" \
+ "Unknown task 999\\."
-# GDB accepts abbreviations for "thread" and "task".
+# GDB accepts abbreviations for "thread", "task" and
+# "-force-condition", when these keywords appear after
+# the breakpoint condition.
gdb_test "break *main if (1==1) t 999" \
"Unknown thread 999\\."
gdb_test "break *main if (1==1) th 999" \
"Unknown thread 999\\."
gdb_test "break *main if (1==1) ta 999" \
"Unknown task 999\\."
+gdb_test "break *main if (1==1) t 999 -force" \
+ "Unknown thread 999\\."
+gdb_test "break *main if (1==1) th 999 -force" \
+ "Unknown thread 999\\."
+gdb_test "break *main if (1==1) ta 999 -force" \
+ "Unknown task 999\\."
+
+# Check the use of abbreviations before the condition. This works
+# because, when the location spec starts with '*' GDB is able to
+# figure out that the complete location is '*main'.
+gdb_test "break *main t 999 if (1==1)" \
+ "Unknown thread 999\\."
+gdb_test "break *main th 999 if (1==1)" \
+ "Unknown thread 999\\."
+gdb_test "break *main ta 999 if (1==1)" \
+ "Unknown task 999\\."
+gdb_test "break *main t 999 -force if (1==1)" \
+ "Unknown thread 999\\."
+gdb_test "break *main th 999 -force if (1==1)" \
+ "Unknown thread 999\\."
+gdb_test "break *main ta 999 -force if (1==1)" \
+ "Unknown task 999\\."
+
+# However, when the location spec doesn't start with '*' GDB relies on
+# the linespec parser to spot the keyword which marks the end of the
+# linespec, and this parser doesn't check for abbreviations.
+gdb_test "with breakpoint pending off -- break main t 999 if (1==1)" \
+ "Function \"main t 999\" not defined\\."
+gdb_test "with breakpoint pending off -- break main th 999 if (1==1)" \
+ "Function \"main th 999\" not defined\\."
+gdb_test "with breakpoint pending off -- break main ta 999 if (1==1)" \
+ "Function \"main ta 999\" not defined\\."
+
+# GDB does not treat a "-force-condition" flag that appears
+# immediately after the condition as the flag, but instead treats it
+# as " - force - condition", that is, subtraction of the symbol
+# "force" followed by subtraction of symbol "context". This is really
+# just a quirk of how this used to be implemented, and should maybe be
+# changed in the future. However, for now GDB retains this behaviour.
+gdb_test "break *main if (1==1) -force-condition" \
+ "No symbol \"force\" in current context\\."
set test "run until breakpoint at marker3"
gdb_test_multiple "continue" $test {
diff --git a/gdb/testsuite/gdb.base/pending.exp b/gdb/testsuite/gdb.base/pending.exp
index d7d3735000a..645f63bdb16 100644
--- a/gdb/testsuite/gdb.base/pending.exp
+++ b/gdb/testsuite/gdb.base/pending.exp
@@ -170,7 +170,8 @@ gdb_test "info break" \
\[\t \]+stop only if k == 1.*
\[\t \]+print k.*
\[0-9\]+\[\t \]+breakpoint keep y.* in main at .*$srcfile:$mainline.*
-\[0-9\]+\[\t \]+breakpoint keep y.*PENDING.*pendshr.c:$bp2_loc if x > 3.*" \
+\[0-9\]+\[\t \]+breakpoint keep y.*PENDING.*pendshr.c:$bp2_loc.*
+\\s+stop only if x > 3.*" \
"multiple pending breakpoints"
@@ -195,8 +196,10 @@ gdb_test "info break" \
\[\t \]+stop only if k == 1.*
\[\t \]+print k.*
\[0-9\]+\[\t \]+breakpoint keep y.* in main at .*$srcfile:$mainline.*
-\[0-9\]+\[\t \]+breakpoint keep y.*PENDING.*pendshr.c:$bp2_loc if x > 3.*
-\[0-9\]+\[\t \]+breakpoint keep y.*PENDING.*pendshr.c:$bp3_loc.*ignore next 2 hits.*" \
+\[0-9\]+\[\t \]+breakpoint keep y.*PENDING.*pendshr.c:$bp2_loc.*
+\\s+stop only if x > 3.*
+\[0-9\]+\[\t \]+breakpoint keep y.*PENDING.*pendshr.c:$bp3_loc.*
+\\s+ignore next 2 hits.*" \
"multiple pending breakpoints 2"
#
@@ -267,3 +270,17 @@ gdb_test "info break" \
\[0-9\]+\[\t \]+breakpoint keep y.* in main at .*$srcfile:$mainline.*
\[0-9\]+\[\t \]+breakpoint keep y.*PENDING.*imaginary.*" \
"verify pending breakpoint after restart"
+
+# Test GDB's parsing of pending breakpoint thread and condition.
+
+gdb_test_no_output "set breakpoint pending on"
+gdb_test "break foo if (unknown_var && another_unknown_var) thread 1" \
+ "Breakpoint $decimal \\(foo\\) pending\\."
+set bpnum [get_integer_valueof "\$bpnum" "*INVALID" \
+ "get number for foo breakpoint"]
+gdb_test "info breakpoints $bpnum" \
+ [multi_line \
+ "$bpnum\\s+breakpoint\\s+keep\\s+y\\s+<PENDING>\\s+foo" \
+ "\\s+stop only if \\(unknown_var && another_unknown_var\\)" \
+ "\\s+stop only in thread 1"] \
+ "check pending breakpoint on foo"
diff --git a/gdb/testsuite/gdb.linespec/explicit.exp b/gdb/testsuite/gdb.linespec/explicit.exp
index 668002d9038..8cbefe204ec 100644
--- a/gdb/testsuite/gdb.linespec/explicit.exp
+++ b/gdb/testsuite/gdb.linespec/explicit.exp
@@ -575,7 +575,7 @@ namespace eval $testfile {
allow-pending]} {
fail "set $tst"
} else {
- gdb_test "info break" ".*PENDING.*myfunction if foofoofoo == 1.*" $tst
+ gdb_test "info break" ".*PENDING.*myfunction\r\n\\s+stop only if foofoofoo == 1.*" $tst
}
gdb_exit
@@ -586,7 +586,7 @@ namespace eval $testfile {
allow-pending]} {
fail "set $tst"
} else {
- gdb_test "info break" ".*PENDING.*myfunction if arg == 0" $tst
+ gdb_test "info break" ".*PENDING.*myfunction\r\n\\s+stop only if arg == 0" $tst
gdb_load [standard_output_file $exefile]
gdb_test "info break" \
diff --git a/gdb/testsuite/gdb.mi/mi-dprintf-pending.exp b/gdb/testsuite/gdb.mi/mi-dprintf-pending.exp
index 28f52938aeb..bb9987a5572 100644
--- a/gdb/testsuite/gdb.mi/mi-dprintf-pending.exp
+++ b/gdb/testsuite/gdb.mi/mi-dprintf-pending.exp
@@ -50,7 +50,8 @@ set bp_location1 [gdb_get_line_number "set breakpoint 1 here"]
# Set pending dprintf via MI.
set bp [mi_make_breakpoint_pending -number "1" -type "dprintf" \
-disp "keep" -enabled "y" -pending "pendfunc1" \
- -original-location "pendfunc1"]
+ -original-location "pendfunc1" \
+ -script {\["printf \\\"hello\\\""\]}]
mi_gdb_test "-dprintf-insert -f pendfunc1 \"hello\"" \
".*\\^done,$bp" "mi set dprintf"
diff --git a/gdb/testsuite/gdb.multi/inferior-specific-bp.exp b/gdb/testsuite/gdb.multi/inferior-specific-bp.exp
index 1f6573268da..b8aceabcad6 100644
--- a/gdb/testsuite/gdb.multi/inferior-specific-bp.exp
+++ b/gdb/testsuite/gdb.multi/inferior-specific-bp.exp
@@ -51,9 +51,9 @@ if {![runto_main]} {
# this should fail. Try with the keywords in both orders just in case the
# parser has a bug.
gdb_test "break foo thread 1.1 inferior 1" \
- "You can specify only one of inferior or thread\\."
+ "You can specify only one of thread, inferior, or task\\."
gdb_test "break foo inferior 1 thread 1.1" \
- "You can specify only one of inferior or thread\\."
+ "You can specify only one of thread, inferior, or task\\."
# Try to create a breakpoint using the 'inferior' keyword multiple times.
gdb_test "break foo inferior 1 inferior 2" \
diff --git a/gdb/testsuite/gdb.threads/del-pending-thread-bp-lib.c b/gdb/testsuite/gdb.threads/del-pending-thread-bp-lib.c
new file mode 100644
index 00000000000..15d1b9833dd
--- /dev/null
+++ b/gdb/testsuite/gdb.threads/del-pending-thread-bp-lib.c
@@ -0,0 +1,22 @@
+/* Copyright 2023 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+int global_var = 0;
+
+void
+foo (int arg)
+{
+ global_var = arg;
+}
diff --git a/gdb/testsuite/gdb.threads/del-pending-thread-bp.c b/gdb/testsuite/gdb.threads/del-pending-thread-bp.c
new file mode 100644
index 00000000000..938e05bc4d7
--- /dev/null
+++ b/gdb/testsuite/gdb.threads/del-pending-thread-bp.c
@@ -0,0 +1,85 @@
+/* Copyright 2023 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include <dlfcn.h>
+#include <pthread.h>
+#include <stdlib.h>
+
+pthread_barrier_t barrier;
+
+static void
+barrier_wait (pthread_barrier_t *b)
+{
+ int res = pthread_barrier_wait (b);
+ if (res != 0 && res != PTHREAD_BARRIER_SERIAL_THREAD)
+ abort ();
+}
+
+static void *
+thread_worker (void *arg)
+{
+ barrier_wait (&barrier);
+ return NULL;
+}
+
+void
+breakpt ()
+{
+ /* Nothing. */
+}
+
+int
+main (void)
+{
+ void *handle;
+ void (*func)(int);
+ pthread_t thread;
+
+ if (pthread_barrier_init (&barrier, NULL, 2) != 0)
+ abort ();
+
+ if (pthread_create (&thread, NULL, thread_worker, NULL) != 0)
+ abort ();
+
+ breakpt ();
+
+ /* Allow the worker thread to complete. */
+ barrier_wait (&barrier);
+
+ if (pthread_join (thread, NULL) != 0)
+ abort ();
+
+ breakpt ();
+
+ /* Now load the shared library. */
+ handle = dlopen (SHLIB_NAME, RTLD_LAZY);
+ if (handle == NULL)
+ abort ();
+
+ /* Find the function symbol. */
+ func = (void (*)(int)) dlsym (handle, "foo");
+
+ /* Call the library function. */
+ func (1);
+
+ /* Unload the shared library. */
+ if (dlclose (handle) != 0)
+ abort ();
+
+ breakpt ();
+
+ return 0;
+}
+
diff --git a/gdb/testsuite/gdb.threads/del-pending-thread-bp.exp b/gdb/testsuite/gdb.threads/del-pending-thread-bp.exp
new file mode 100644
index 00000000000..4ed05eaa42d
--- /dev/null
+++ b/gdb/testsuite/gdb.threads/del-pending-thread-bp.exp
@@ -0,0 +1,108 @@
+# Copyright 2023 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+# This test checks that pending thread-specific breakpoints are
+# correctly deleted when the thread the breakpoint is for goes out of
+# scope.
+#
+# We also check that we can't create a pending thread-specific
+# breakpoint for a non-existent thread.
+
+require allow_shlib_tests
+
+standard_testfile
+
+set libname $testfile-lib
+set srcfile_lib $srcdir/$subdir/$libname.c
+set binfile_lib [standard_output_file $libname.so]
+
+if { [gdb_compile_shlib $srcfile_lib $binfile_lib {}] != "" } {
+ untested "failed to compile shared library 1"
+ return -1
+}
+
+set binfile_lib_target [gdb_download_shlib $binfile_lib]
+
+if { [prepare_for_testing "failed to prepare" $testfile $srcfile \
+ [list debug \
+ additional_flags=-DSHLIB_NAME=\"$binfile_lib_target\" \
+ shlib_load pthreads]] } {
+ return -1
+}
+
+gdb_locate_shlib $binfile_lib
+
+if ![runto_main] {
+ return 0
+}
+
+# Run until we have two threads.
+gdb_breakpoint "breakpt"
+gdb_continue_to_breakpoint "first breakpt call"
+
+# Confirm that we have a thread '2'.
+gdb_test "info threads" "\r\n\\s+2\\s+\[^\r\n\]+"
+
+# Create a pending, thread-specific, breakpoint on 'foo'.
+gdb_breakpoint "foo thread 2" allow-pending
+set bpnum [get_integer_valueof "\$bpnum" "*INVALID*" \
+ "get breakpoint number"]
+
+# Check we can't create a pending thread-specific breakpoint for a
+# non-existent thread.
+gdb_test "with breakpoint pending on -- break foo thread 99" \
+ "Unknown thread 99\\."
+
+# Continue to 'breakpt' again. Don't use gdb_continue_to_breakpoint
+# as we are looking for the thread exited and breakpoint deleted
+# messages.
+set output [list "Continuing\\."]
+
+if {!([target_info exists gdb_protocol]
+ && ([target_info gdb_protocol] == "remote"
+ || [target_info gdb_protocol] == "extended-remote"))} {
+ # Due to bug PR gdb/30129 we don't see the thread exited messages
+ # for remote targets. When this bit of this test can be cleaned
+ # up.
+ lappend output "\\\[Thread \[^\r\n\]+ exited\\\]"
+}
+
+lappend output "Thread-specific breakpoint $bpnum deleted - thread 2 no longer in the thread list\\." \
+ "" \
+ "Thread 1 \[^\r\n\]+, breakpt \\(\\) at \[^\r\n\]+" \
+ "$decimal\\s+\[^\r\n\]+"
+
+gdb_test "continue" \
+ [multi_line {*}$output] \
+ "second breakpt call"
+
+# Confirm breakpoint has been deleted.
+gdb_test "info breakpoints $bpnum" \
+ "No breakpoint or watchpoint matching '$bpnum'\\."
+
+# Continue again. This will pass through 'foo'. We should not stop
+# in 'foo', the breakpoint has been deleted. We should next stop in
+# breakpt again.
+gdb_test "continue" \
+ [multi_line \
+ "Continuing\\." \
+ "" \
+ "Thread 1 \[^\r\n\]+ hit Breakpoint $decimal, breakpt \\(\\) at \[^\r\n\]+" \
+ "$decimal\\s+\[^\r\n\]+"] \
+ "third breakpt call"
+gdb_test "bt 1" \
+ [multi_line \
+ "#0\\s+breakpt \\(\\) at \[^\r\n\]+" \
+ "\\(More stack frames follow\\.\\.\\.\\)"]
--
2.25.4
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCHv6 07/10] gdb: don't set breakpoint::pspace for in create_breakpoint
2023-10-30 16:11 ` [PATCHv6 00/10] thread-specific breakpoints in just some inferiors Andrew Burgess
` (5 preceding siblings ...)
2023-10-30 16:11 ` [PATCHv6 06/10] gdb: parse pending breakpoint thread/task immediately Andrew Burgess
@ 2023-10-30 16:11 ` Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 08/10] gdb: remove breakpoint_re_set_one Andrew Burgess
` (2 subsequent siblings)
9 siblings, 0 replies; 12+ messages in thread
From: Andrew Burgess @ 2023-10-30 16:11 UTC (permalink / raw)
To: gdb-patches; +Cc: Andrew Burgess
While working on the previous commit, I ran into this code within
create_breakpoint:
if ((type_wanted != bp_breakpoint
&& type_wanted != bp_hardware_breakpoint) || thread != -1)
b->pspace = current_program_space;
this code is only executed when creating a pending breakpoint, and
sets the breakpoint::pspace member variable.
The above code gained the 'thread != -1' clause with this commit:
commit cc72b2a2da6d6372cbdb1d14639a5fce84e1a325
Date: Fri Dec 23 17:06:16 2011 +0000
Introduce gdb.FinishBreakpoint in Python
While the type_wanted checks were added with this commit:
commit f8eba3c61629b3c03ac1f33853eab4d8507adb9c
Date: Tue Dec 6 18:54:43 2011 +0000
the "ambiguous linespec" series
Before this breakpoint::pspace was set unconditionally.
If we look at how breakpoint::pspace is used today, some breakpoint
types specifically set this field, either in their constructors, or in
a wrapper function that calls the constructor. So, the watchpoint
type and its sub-class set this variable, as does the catchpoint type,
and all it's sub-classes.
However, code_breakpoint doesn't specifically set this field within
its constructor, though some sub-classes of
code_breakpoint (ada_catchpoint, exception_catchpoint,
internal_breakpoint, and momentary_breakpoint) do set this field.
When I examine all the places that breakpoint::pspace is used, I
believe that in every place where it is expected that this field is
set, the breakpoint type will be one that specifically sets this
field.
Next, I observe two problems with the existing code.
First, the above code is only hit for pending breakpoints, there's no
equivalent code for non-pending breakpoints. This opens up the
possibility of GDB entering non-consistent states; if a breakpoint is
first created pending and then later gets a location, the pspace field
will be set, while if the breakpoint is immediately non-pending, then
the pspace field will never be set.
Second, if we look at how breakpoint::pspace is used in the function
breakpoint_program_space_exit, we see that when a program space is
removed, any breakpoint with breakpoint::pspace set to the removed
program space, will be deleted. This makes sense, but does mean we
need to ensure breakpoint::pspace is only set for breakpoints that
apply to a single program space.
So, if I create pending dprintf breakpoint (type bp_dprintf) then the
breakpoint::pspace variable will be set even though the dprintf is not
really tied to that one program space. As a result, when the matching
program space is removed the dprintf is incorrectly removed.
Also, if I create a thread specific breakpoint, then, thanks to the
'thread != -1' clause the wrong program space will be stored in
breakpoint::pspace (the current program space is always used, which
might not be the program space that corresponds to the selected
thread), as a result, the thread specific breakpoint will be deleted
when the matching program space is removed.
If we look at commit cc72b2a2da6d which added the 'thread != -1'
clause, we can see this change was entirely redundant, the
breakpoint::pspace is also set in bpfinishpy_init after
create_breakpoint has been called. As such, I think we can safely
drop the 'thread != -1' clause.
For the other problems, I'm proposing to be pretty aggressive - I'd
like to drop the breakpoint::pspace assignment completely from
create_breakpoint. Having looked at how this variable is used, I
believe that it is already set elsewhere in all the cases that it is
needed. Maybe this code was needed at one time, but I can't see how
it's needed any more.
There's tests to expose the issues I've spotted with this code, and
there's no regressions in testing.
---
gdb/breakpoint.c | 3 -
gdb/breakpoint.h | 18 +-
.../gdb.multi/pending-bp-del-inferior.c | 28 +++
.../gdb.multi/pending-bp-del-inferior.exp | 216 ++++++++++++++++++
4 files changed, 259 insertions(+), 6 deletions(-)
create mode 100644 gdb/testsuite/gdb.multi/pending-bp-del-inferior.c
create mode 100644 gdb/testsuite/gdb.multi/pending-bp-del-inferior.exp
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 3d8eab826bd..6370c17c4e0 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -9208,9 +9208,6 @@ create_breakpoint (struct gdbarch *gdbarch,
b->disposition = tempflag ? disp_del : disp_donttouch;
b->condition_not_parsed = 1;
b->enable_state = enabled ? bp_enabled : bp_disabled;
- if ((type_wanted != bp_breakpoint
- && type_wanted != bp_hardware_breakpoint) || thread != -1)
- b->pspace = current_program_space;
if (b->type == bp_dprintf)
update_dprintf_command_list (b.get ());
diff --git a/gdb/breakpoint.h b/gdb/breakpoint.h
index baa54573e1a..b37208271e4 100644
--- a/gdb/breakpoint.h
+++ b/gdb/breakpoint.h
@@ -823,9 +823,21 @@ struct breakpoint : public intrusive_list_node<breakpoint>
equals this. */
struct frame_id frame_id = null_frame_id;
- /* The program space used to set the breakpoint. This is only set
- for breakpoints which are specific to a program space; for
- non-thread-specific ordinary breakpoints this is NULL. */
+ /* The program space used to set the breakpoint. This is only set for
+ breakpoints that are not type bp_breakpoint or bp_hardware_breakpoint.
+ For thread or inferior specific breakpoints, the breakpoints are
+ managed via the thread and inferior member variables. */
+
+ /* If not nullptr then this is the program space for which this
+ breakpoint was created. All watchpoint and catchpoint sub-types set
+ this field, but not all of the code_breakpoint sub-types do;
+ generally, user created breakpoint types don't set this field, though
+ things might be more consistent if they did.
+
+ When this variable is nullptr then a breakpoint might be associated
+ with multiple program spaces, though you need to check the thread,
+ inferior and task variables to see if a breakpoint was created for a
+ specific thread, inferior, or Ada task respectively. */
program_space *pspace = NULL;
/* The location specification we used to set the breakpoint. */
diff --git a/gdb/testsuite/gdb.multi/pending-bp-del-inferior.c b/gdb/testsuite/gdb.multi/pending-bp-del-inferior.c
new file mode 100644
index 00000000000..51b6492085f
--- /dev/null
+++ b/gdb/testsuite/gdb.multi/pending-bp-del-inferior.c
@@ -0,0 +1,28 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2023 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+int
+foo ()
+{
+ return 0;
+}
+
+int
+main ()
+{
+ return foo ();
+}
diff --git a/gdb/testsuite/gdb.multi/pending-bp-del-inferior.exp b/gdb/testsuite/gdb.multi/pending-bp-del-inferior.exp
new file mode 100644
index 00000000000..cb1f119ff94
--- /dev/null
+++ b/gdb/testsuite/gdb.multi/pending-bp-del-inferior.exp
@@ -0,0 +1,216 @@
+# Copyright 2023 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+# Setup two inferiors. Select one inferior and create a pending
+# thread specific breakpoint in the other inferior.
+#
+# Delete the selected inferior (the one for which the thread specific
+# breakpoint doesn't apply), and check that the breakpoint still exists.
+#
+# Repeat this process, but this time, create an inferior specific
+# breakpoint.
+
+# The plain remote target can't do multiple inferiors.
+require !use_gdb_stub
+
+standard_testfile
+
+if {[prepare_for_testing "failed to prepare" $testfile $srcfile]} {
+ return -1
+}
+
+# Setup for the tests. Create two inferiors, both running the global
+# BINFILE, and proceed to main in both inferiors. Delete all
+# breakpoints, and check that we do have two threads.
+#
+# Return true after a successful setup, otherwise, return false.
+proc test_setup {} {
+ clean_restart $::binfile
+
+ if {![runto_main]} {
+ return 0
+ }
+
+ gdb_test "add-inferior -exec ${::binfile}" "Added inferior 2.*" \
+ "add inferior 2"
+ gdb_test "inferior 2" "Switching to inferior 2 .*" \
+ "select inferior 2"
+
+ if {![runto_main]} {
+ return 0
+ }
+
+ delete_breakpoints
+
+ gdb_test "info threads" \
+ [multi_line \
+ " Id\\s+Target Id\\s+Frame\\s*" \
+ " 1\\.1\\s+\[^\r\n\]+" \
+ "\\* 2\\.1\\s+\[^\r\n\]+"] \
+ "check we have the expected threads"
+
+ return 1
+}
+
+# Assuming inferior 2 is already selected, kill the current inferior
+# (inferior 2), selected inferior 1, and then remove inferior 2.
+proc kill_and_remove_inferior_2 {} {
+ gdb_test "kill" "" "kill inferior 2" \
+ "Kill the program being debugged.*y or n. $" "y"
+
+ gdb_test "inferior 1" "Switching to inferior 1 .*" \
+ "select inferior 1"
+
+ gdb_test_no_output "remove-inferiors 2"
+}
+
+# Setup two inferiors, then created a breakpoint. If BP_PENDING is
+# true then the breakpoint will be pending, otherwise, the breakpoint
+# will be non-pending.
+#
+# BP_TYPE is either 'thread' or 'inferior', and indicates if the
+# created breakpoint should be thread or inferior specific.
+#
+# The breakpoint is created while inferior 2 is selected, and the
+# thread/inferior restriction always identifies inferior 1.
+#
+# Then inferior 2 is killed and removed.
+#
+# Finally, check that the breakpoint still exists and correctly refers
+# to inferior 1.
+proc do_bp_test { bp_type bp_pending } {
+ if {![test_setup]} {
+ return
+ }
+
+ if { $bp_pending } {
+ set bp_func "bar"
+ } else {
+ set bp_func "foo"
+ }
+
+ if { $bp_type eq "thread" } {
+ set bp_restriction "thread 1.1"
+ } else {
+ set bp_restriction "inferior 1"
+ }
+
+ gdb_breakpoint "$bp_func $bp_restriction" allow-pending
+ set bp_number [get_integer_valueof "\$bpnum" "INVALID" \
+ "get b/p number for previous breakpoint"]
+
+ if { $bp_restriction eq "thread 1.1" } {
+ set bp_after_restriction "thread 1"
+ } else {
+ set bp_after_restriction $bp_restriction
+ }
+
+ if { $bp_pending } {
+ set bp_pattern_before \
+ [multi_line \
+ "$bp_number\\s+breakpoint\\s+keep\\s+y\\s+<PENDING>\\s+${bp_func}" \
+ "\\s+stop only in [string_to_regexp $bp_restriction]"]
+ set bp_pattern_after \
+ [multi_line \
+ "$bp_number\\s+breakpoint\\s+keep\\s+y\\s+<PENDING>\\s+${bp_func}" \
+ "\\s+stop only in [string_to_regexp $bp_after_restriction]"]
+ } else {
+ set bp_pattern_before \
+ [multi_line \
+ "$bp_number\\s+breakpoint\\s+keep\\s+y\\s+<MULTIPLE>\\s*" \
+ "\\s+stop only in [string_to_regexp $bp_restriction]" \
+ "$bp_number\\.1\\s+y\\s+$::hex in $bp_func at \[^\r\n\]+ inf 1" \
+ "$bp_number\\.2\\s+y\\s+$::hex in $bp_func at \[^\r\n\]+ inf 2"]
+
+ set bp_pattern_after \
+ [multi_line \
+ "$bp_number\\s+breakpoint\\s+keep\\s+y\\s+$::hex in $bp_func at \[^\r\n\]+" \
+ "\\s+stop only in [string_to_regexp $bp_after_restriction]"]
+ }
+
+ gdb_test "info breakpoints" $bp_pattern_before \
+ "info breakpoints before inferior removal"
+
+ kill_and_remove_inferior_2
+
+ gdb_test "info breakpoints" $bp_pattern_after \
+ "info breakpoints after inferior removal"
+}
+
+# Setup two inferiors, then created a dprintf. If BP_PENDING is
+# true then the dprintf will be pending, otherwise, the dprintf
+# will be non-pending.
+#
+# The dprintf is created while inferior 2. Then inferior 2 is killed
+# and removed.
+#
+# Finally, check that the dprintf still exists.
+proc do_dprintf_test { bp_pending } {
+ if {![test_setup]} {
+ return
+ }
+
+ if { $bp_pending } {
+ set bp_func "bar"
+
+ gdb_test "dprintf $bp_func,\"in $bp_func\"" ".*" \
+ "create dprintf breakpoint" \
+ "Make dprintf pending on future shared library load\\? \\(y or .n.\\) $" "y"
+ } else {
+ set bp_func "foo"
+
+ gdb_test "dprintf $bp_func,\"in $bp_func\"" ".*" \
+ "create dprintf breakpoint"
+ }
+
+ set bp_number [get_integer_valueof "\$bpnum" "INVALID" \
+ "get b/p number for previous breakpoint"]
+
+ if { $bp_pending } {
+ set bp_pattern_before \
+ [multi_line \
+ "$bp_number\\s+dprintf\\s+keep\\s+y\\s+<PENDING>\\s+${bp_func}" \
+ "\\s+printf \"in $bp_func\""]
+ set bp_pattern_after $bp_pattern_before
+ } else {
+ set bp_pattern_before \
+ [multi_line \
+ "$bp_number\\s+dprintf\\s+keep\\s+y\\s+<MULTIPLE>\\s*" \
+ "\\s+printf \"in $bp_func\"" \
+ "$bp_number\\.1\\s+y\\s+$::hex in $bp_func at \[^\r\n\]+ inf 1" \
+ "$bp_number\\.2\\s+y\\s+$::hex in $bp_func at \[^\r\n\]+ inf 2"]
+
+ set bp_pattern_after \
+ [multi_line \
+ "$bp_number\\s+dprintf\\s+keep\\s+y\\s+$::hex in $bp_func at \[^\r\n\]+" \
+ "\\s+printf \"in $bp_func\""]
+ }
+
+ gdb_test "info breakpoints" $bp_pattern_before \
+ "info breakpoints before inferior removal"
+
+ kill_and_remove_inferior_2
+
+ gdb_test "info breakpoints" $bp_pattern_after \
+ "info breakpoints after inferior removal"
+}
+
+foreach_with_prefix bp_pending { true false } {
+ foreach_with_prefix bp_type { thread inferior } {
+ do_bp_test $bp_type $bp_pending
+ }
+
+ do_dprintf_test $bp_pending
+}
--
2.25.4
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCHv6 08/10] gdb: remove breakpoint_re_set_one
2023-10-30 16:11 ` [PATCHv6 00/10] thread-specific breakpoints in just some inferiors Andrew Burgess
` (6 preceding siblings ...)
2023-10-30 16:11 ` [PATCHv6 07/10] gdb: don't set breakpoint::pspace for in create_breakpoint Andrew Burgess
@ 2023-10-30 16:11 ` Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 09/10] gdb: remove tracepoint_probe_create_sals_from_location_spec Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 10/10] gdb: only insert thread-specific breakpoints in the relevant inferior Andrew Burgess
9 siblings, 0 replies; 12+ messages in thread
From: Andrew Burgess @ 2023-10-30 16:11 UTC (permalink / raw)
To: gdb-patches; +Cc: Andrew Burgess
During a later patch I wanted to reset a single breakpoint, so I
called breakpoint_re_set_one. However, this is not the right thing to
do. If we look at breakpoint_re_set then we see that there's a whole
bunch of state that needs to be preserved prior to calling
breakpoint_re_set_one, and after calling breakpoint_re_set_one we
still need to call update_global_location_list.
I could just update the comment on breakpoint_re_set_one to make it
clearer how the function should be used -- or more likely to warn that
the function should only be used as a helper from breakpoint_re_set.
However, breakpoint_re_set_one is only 3 lines long. So I figure it
might actually be easier to just fold breakpoint_re_set_one into
breakpoint_re_set, then there's no risk of accidentally calling
breakpoint_re_set_one when we shouldn't.
There should be no user visible changes after this commit.
---
gdb/breakpoint.c | 26 ++++++++------------------
1 file changed, 8 insertions(+), 18 deletions(-)
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 6370c17c4e0..34dd7c320b1 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -13015,17 +13015,6 @@ create_sals_from_location_spec_default (location_spec *locspec,
parse_breakpoint_sals (locspec, canonical);
}
-/* Reset a breakpoint. */
-
-static void
-breakpoint_re_set_one (breakpoint *b)
-{
- input_radix = b->input_radix;
- set_language (b->language);
-
- b->re_set ();
-}
-
/* Re-set breakpoint locations for the current program space.
Locations bound to other program spaces are left untouched. */
@@ -13037,12 +13026,11 @@ breakpoint_re_set (void)
scoped_restore save_input_radix = make_scoped_restore (&input_radix);
scoped_restore_current_pspace_and_thread restore_pspace_thread;
- /* breakpoint_re_set_one sets the current_language to the language
- of the breakpoint it is resetting (see prepare_re_set_context)
- before re-evaluating the breakpoint's location. This change can
- unfortunately get undone by accident if the language_mode is set
- to auto, and we either switch frames, or more likely in this context,
- we select the current frame.
+ /* To ::re_set each breakpoint we set the current_language to the
+ language of the breakpoint before re-evaluating the breakpoint's
+ location. This change can unfortunately get undone by accident if
+ the language_mode is set to auto, and we either switch frames, or
+ more likely in this context, we select the current frame.
We prevent this by temporarily turning the language_mode to
language_mode_manual. We restore it once all breakpoints
@@ -13059,7 +13047,9 @@ breakpoint_re_set (void)
{
try
{
- breakpoint_re_set_one (&b);
+ input_radix = b.input_radix;
+ set_language (b.language);
+ b.re_set ();
}
catch (const gdb_exception &ex)
{
--
2.25.4
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCHv6 09/10] gdb: remove tracepoint_probe_create_sals_from_location_spec
2023-10-30 16:11 ` [PATCHv6 00/10] thread-specific breakpoints in just some inferiors Andrew Burgess
` (7 preceding siblings ...)
2023-10-30 16:11 ` [PATCHv6 08/10] gdb: remove breakpoint_re_set_one Andrew Burgess
@ 2023-10-30 16:11 ` Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 10/10] gdb: only insert thread-specific breakpoints in the relevant inferior Andrew Burgess
9 siblings, 0 replies; 12+ messages in thread
From: Andrew Burgess @ 2023-10-30 16:11 UTC (permalink / raw)
To: gdb-patches; +Cc: Andrew Burgess
The tracepoint_probe_create_sals_from_location_spec function just
forwards all its arguments to
bkpt_probe_create_sals_from_location_spec, and is only used in one
place.
Lets delete tracepoint_probe_create_sals_from_location_spec and
replace it with bkpt_probe_create_sals_from_location_spec.
There should be no user visible changes after this commit.
---
gdb/breakpoint.c | 19 +++----------------
1 file changed, 3 insertions(+), 16 deletions(-)
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 34dd7c320b1..e4be2ac027b 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -284,9 +284,6 @@ static bool strace_marker_p (struct breakpoint *b);
static void bkpt_probe_create_sals_from_location_spec
(location_spec *locspec,
struct linespec_result *canonical);
-static void tracepoint_probe_create_sals_from_location_spec
- (location_spec *locspec,
- struct linespec_result *canonical);
const struct breakpoint_ops code_breakpoint_ops =
{
@@ -301,10 +298,11 @@ static const struct breakpoint_ops bkpt_probe_breakpoint_ops =
create_breakpoints_sal,
};
-/* Tracepoints set on probes. */
+/* Tracepoints set on probes. We use the same methods as for breakpoints
+ on probes. */
static const struct breakpoint_ops tracepoint_probe_breakpoint_ops =
{
- tracepoint_probe_create_sals_from_location_spec,
+ bkpt_probe_create_sals_from_location_spec,
create_breakpoints_sal,
};
@@ -12221,17 +12219,6 @@ tracepoint::print_recreate (struct ui_file *fp) const
gdb_printf (fp, " passcount %d\n", pass_count);
}
-/* Virtual table for tracepoints on static probes. */
-
-static void
-tracepoint_probe_create_sals_from_location_spec
- (location_spec *locspec,
- struct linespec_result *canonical)
-{
- /* We use the same method for breakpoint on probes. */
- bkpt_probe_create_sals_from_location_spec (locspec, canonical);
-}
-
void
dprintf_breakpoint::re_set ()
{
--
2.25.4
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCHv6 10/10] gdb: only insert thread-specific breakpoints in the relevant inferior
2023-10-30 16:11 ` [PATCHv6 00/10] thread-specific breakpoints in just some inferiors Andrew Burgess
` (8 preceding siblings ...)
2023-10-30 16:11 ` [PATCHv6 09/10] gdb: remove tracepoint_probe_create_sals_from_location_spec Andrew Burgess
@ 2023-10-30 16:11 ` Andrew Burgess
9 siblings, 0 replies; 12+ messages in thread
From: Andrew Burgess @ 2023-10-30 16:11 UTC (permalink / raw)
To: gdb-patches; +Cc: Andrew Burgess, Eli Zaretskii
This commit updates GDB so that thread or inferior specific
breakpoints are only inserted into the program space in which the
specific thread or inferior is running.
In terms of implementation, getting this basically working is easy
enough, now that a breakpoint's thread or inferior field is setup
prior to GDB looking for locations, we can easily use this information
to find a suitable program_space and pass this to as a filter when
creating the sals.
Or we could if breakpoint_ops::create_sals_from_location_spec allowed
us to pass in a filter program_space.
So, this commit extends breakpoint_ops::create_sals_from_location_spec
to take a program_space argument, and uses this to filter the set of
returned sals. This accounts for about half the change in this patch.
The second set of changes starts from breakpoint_set_thread and
breakpoint_set_inferior, this is called when the thread or inferior
for a breakpoint changes, e.g. from the Python API.
Previously this call would never result in the locations of a
breakpoint changing, after all, locations were inserted in every
program space, and we just use the thread or inferior variable to
decide when we should stop. Now though, changing a breakpoint's
thread or inferior can mean we need to figure out a new set of
breakpoint locations.
To support this I've added a new breakpoint_re_set_one function, which
is like breakpoint_re_set, but takes a single breakpoint, and just
updates the locations for that one breakpoint. We only need to call
this function if the program_space in which a breakpoint's thread (or
inferior) is running actually changes. If the program_space does
change then we call the new breakpoint_re_set_one function passing in
the program_space which should be used to filter the new locations (or
nullptr to indicate we should set locations in all program spaces).
This filter program_space needs to propagate down to all the re_set
methods, this accounts for the remaining half of the changes in this
patch.
There were a couple of existing tests that created thread or inferior
specific breakpoints and then checked the 'info breakpoints' output,
these needed updating. These were:
gdb.mi/user-selected-context-sync.exp
gdb.multi/bp-thread-specific.exp
gdb.multi/multi-target-continue.exp
gdb.multi/multi-target-ping-pong-next.exp
gdb.multi/tids.exp
gdb.mi/new-ui-bp-deleted.exp
gdb.multi/inferior-specific-bp.exp
gdb.multi/pending-bp-del-inferior.exp
I've also added some additional tests to:
gdb.multi/pending-bp.exp
I've updated the documentation and added a NEWS entry.
Reviewed-By: Eli Zaretskii <eliz@gnu.org>
---
gdb/NEWS | 7 +
gdb/ada-lang.c | 6 +-
gdb/break-catch-throw.c | 6 +-
gdb/breakpoint.c | 280 ++++++++++++++----
gdb/breakpoint.h | 29 +-
gdb/testsuite/gdb.mi/new-ui-bp-deleted.exp | 8 +-
.../gdb.mi/user-selected-context-sync.exp | 4 +-
.../gdb.multi/bp-thread-specific.exp | 7 +-
.../gdb.multi/inferior-specific-bp.exp | 12 +-
.../gdb.multi/multi-target-continue.exp | 2 +-
.../gdb.multi/multi-target-ping-pong-next.exp | 4 +-
.../gdb.multi/pending-bp-del-inferior.exp | 6 +-
gdb/testsuite/gdb.multi/pending-bp.exp | 206 +++++++++++++
gdb/testsuite/gdb.multi/tids.exp | 6 +-
14 files changed, 484 insertions(+), 99 deletions(-)
diff --git a/gdb/NEWS b/gdb/NEWS
index 22230d70d08..0334a0b5111 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -10,6 +10,13 @@
'thread' or 'task' keywords are parsed at the time the breakpoint is
created, rather than at the time the breakpoint becomes non-pending.
+* Thread-specific breakpoints are only inserted into the program space
+ in which the thread of interest is running. In most cases program
+ spaces are unique for each inferior, so this means that
+ thread-specific breakpoints will usually only be inserted for the
+ inferior containing the thread of interest. The breakpoint will
+ be hit no less than before.
+
* Python API
** New function gdb.notify_mi(NAME, DATA), that emits custom
diff --git a/gdb/ada-lang.c b/gdb/ada-lang.c
index 9bb649e901d..9122850047e 100644
--- a/gdb/ada-lang.c
+++ b/gdb/ada-lang.c
@@ -12079,11 +12079,11 @@ struct ada_catchpoint : public code_breakpoint
enable_state = enabled ? bp_enabled : bp_disabled;
language = language_ada;
- re_set ();
+ re_set (pspace);
}
struct bp_location *allocate_location () override;
- void re_set () override;
+ void re_set (program_space *pspace) override;
void check_status (struct bpstat *bs) override;
enum print_stop_action print_it (const bpstat *bs) const override;
bool print_one (const bp_location **) const override;
@@ -12128,7 +12128,7 @@ static struct symtab_and_line ada_exception_sal
catchpoint kinds. */
void
-ada_catchpoint::re_set ()
+ada_catchpoint::re_set (program_space *pspace)
{
std::vector<symtab_and_line> sals;
try
diff --git a/gdb/break-catch-throw.c b/gdb/break-catch-throw.c
index 47d534c5ee8..e661d1624e8 100644
--- a/gdb/break-catch-throw.c
+++ b/gdb/break-catch-throw.c
@@ -82,10 +82,10 @@ struct exception_catchpoint : public code_breakpoint
_("invalid type-matching regexp")))
{
pspace = current_program_space;
- re_set ();
+ re_set (pspace);
}
- void re_set () override;
+ void re_set (program_space *pspace) override;
enum print_stop_action print_it (const bpstat *bs) const override;
bool print_one (const bp_location **) const override;
void print_mention () const override;
@@ -198,7 +198,7 @@ exception_catchpoint::check_status (struct bpstat *bs)
/* Implement the 're_set' method. */
void
-exception_catchpoint::re_set ()
+exception_catchpoint::re_set (program_space *pspace)
{
std::vector<symtab_and_line> sals;
struct program_space *filter_pspace = current_program_space;
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index e4be2ac027b..3f5f2ac6101 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -91,9 +91,12 @@
static void map_breakpoint_numbers (const char *,
gdb::function_view<void (breakpoint *)>);
-static void
- create_sals_from_location_spec_default (location_spec *locspec,
- linespec_result *canonical);
+static void parse_breakpoint_sals (location_spec *locspec,
+ linespec_result *canonical,
+ program_space *search_pspace);
+
+static void breakpoint_re_set_one (breakpoint *b,
+ program_space *filter_pspace);
static void create_breakpoints_sal (struct gdbarch *,
struct linespec_result *,
@@ -283,11 +286,12 @@ static bool strace_marker_p (struct breakpoint *b);
static void bkpt_probe_create_sals_from_location_spec
(location_spec *locspec,
- struct linespec_result *canonical);
+ struct linespec_result *canonical,
+ struct program_space *search_pspace);
const struct breakpoint_ops code_breakpoint_ops =
{
- create_sals_from_location_spec_default,
+ parse_breakpoint_sals,
create_breakpoints_sal,
};
@@ -352,7 +356,7 @@ struct internal_breakpoint : public code_breakpoint
disposition = disp_donttouch;
}
- void re_set () override;
+ void re_set (program_space *pspace) override;
void check_status (struct bpstat *bs) override;
enum print_stop_action print_it (const bpstat *bs) const override;
void print_mention () const override;
@@ -389,7 +393,7 @@ struct momentary_breakpoint : public code_breakpoint
gdb_assert (inferior == -1);
}
- void re_set () override;
+ void re_set (program_space *pspace) override;
void check_status (struct bpstat *bs) override;
enum print_stop_action print_it (const bpstat *bs) const override;
void print_mention () const override;
@@ -400,7 +404,7 @@ struct dprintf_breakpoint : public ordinary_breakpoint
{
using ordinary_breakpoint::ordinary_breakpoint;
- void re_set () override;
+ void re_set (program_space *pspace) override;
int breakpoint_hit (const struct bp_location *bl,
const address_space *aspace,
CORE_ADDR bp_addr,
@@ -1554,7 +1558,36 @@ breakpoint_set_thread (struct breakpoint *b, int thread)
int old_thread = b->thread;
b->thread = thread;
if (old_thread != thread)
- notify_breakpoint_modified (b);
+ {
+ /* If THREAD is in a different program_space than OLD_THREAD, or the
+ breakpoint has switched to or from being thread-specific, then we
+ need to re-set the locations of this breakpoint. First, figure
+ out the program_space for the old and new threads, use a value of
+ nullptr to indicate the breakpoint is in all program spaces. */
+ program_space *old_pspace = nullptr;
+ if (old_thread != -1)
+ {
+ struct thread_info *thr = find_thread_global_id (old_thread);
+ gdb_assert (thr != nullptr);
+ old_pspace = thr->inf->pspace;
+ }
+
+ program_space *new_pspace = nullptr;
+ if (thread != -1)
+ {
+ struct thread_info *thr = find_thread_global_id (thread);
+ gdb_assert (thr != nullptr);
+ new_pspace = thr->inf->pspace;
+ }
+
+ /* If the program space has changed for this breakpoint, then
+ re-evaluate it's locations. */
+ if (old_pspace != new_pspace)
+ breakpoint_re_set_one (b, new_pspace);
+
+ /* Let others know the breakpoint has changed. */
+ notify_breakpoint_modified (b);
+ }
}
/* See breakpoint.h. */
@@ -1573,7 +1606,34 @@ breakpoint_set_inferior (struct breakpoint *b, int inferior)
int old_inferior = b->inferior;
b->inferior = inferior;
if (old_inferior != inferior)
- notify_breakpoint_modified (b);
+ {
+ /* If INFERIOR is in a different program_space than OLD_INFERIOR, or
+ the breakpoint has switch to or from inferior-specific, then we
+ need to re-set the locations of this breakpoint. First, figure
+ out the program_space for the old and new inferiors, use a value
+ of nullptr to indicate the breakpoint is in all program
+ spaces. */
+ program_space *old_pspace = nullptr;
+ if (old_inferior != -1)
+ {
+ struct inferior *inf = find_inferior_id (old_inferior);
+ gdb_assert (inf != nullptr);
+ old_pspace = inf->pspace;
+ }
+
+ program_space *new_pspace = nullptr;
+ if (inferior != -1)
+ {
+ struct inferior *inf = find_inferior_id (inferior);
+ gdb_assert (inf != nullptr);
+ new_pspace = inf->pspace;
+ }
+
+ if (old_pspace != new_pspace)
+ breakpoint_re_set_one (b, new_pspace);
+
+ notify_breakpoint_modified (b);
+ }
}
/* See breakpoint.h. */
@@ -8815,7 +8875,8 @@ create_breakpoints_sal (struct gdbarch *gdbarch,
static void
parse_breakpoint_sals (location_spec *locspec,
- struct linespec_result *canonical)
+ struct linespec_result *canonical,
+ struct program_space *search_pspace)
{
struct symtab_and_line cursal;
@@ -8879,7 +8940,7 @@ parse_breakpoint_sals (location_spec *locspec,
&& strchr ("+-", spec[0]) != NULL
&& spec[1] != '['))
{
- decode_line_full (locspec, DECODE_LINE_FUNFIRSTLINE, NULL,
+ decode_line_full (locspec, DECODE_LINE_FUNFIRSTLINE, search_pspace,
get_last_displayed_symtab (),
get_last_displayed_line (),
canonical, NULL, NULL);
@@ -8887,7 +8948,7 @@ parse_breakpoint_sals (location_spec *locspec,
}
}
- decode_line_full (locspec, DECODE_LINE_FUNFIRSTLINE, NULL,
+ decode_line_full (locspec, DECODE_LINE_FUNFIRSTLINE, search_pspace,
cursal.symtab, cursal.line, canonical, NULL, NULL);
}
@@ -8986,6 +9047,39 @@ breakpoint_ops_for_location_spec_type (enum location_spec_type locspec_type,
}
}
+/* Return the program space to use as a filter when searching for locations
+ of a breakpoint specific to THREAD or INFERIOR. If THREAD and INFERIOR
+ are both -1, meaning all threads/inferiors, then this function returns
+ nullptr, indicating no program space filtering should be performed.
+ Otherwise, this function returns the program space for the inferior that
+ contains THREAD (when THREAD is not -1), or the program space for
+ INFERIOR (when INFERIOR is not -1). */
+
+static struct program_space *
+find_program_space_for_breakpoint (int thread, int inferior)
+{
+ if (thread != -1)
+ {
+ gdb_assert (inferior == -1);
+
+ struct thread_info *thr = find_thread_global_id (thread);
+ gdb_assert (thr != nullptr);
+ gdb_assert (thr->inf != nullptr);
+ return thr->inf->pspace;
+ }
+ else if (inferior != -1)
+ {
+ gdb_assert (thread == -1);
+
+ struct inferior *inf = find_inferior_id (inferior);
+ gdb_assert (inf != nullptr);
+
+ return inf->pspace;
+ }
+
+ return nullptr;
+}
+
/* See breakpoint.h. */
const struct breakpoint_ops *
@@ -9088,7 +9182,10 @@ create_breakpoint (struct gdbarch *gdbarch,
try
{
- ops->create_sals_from_location_spec (locspec, &canonical);
+ struct program_space *search_pspace
+ = find_program_space_for_breakpoint (thread, inferior);
+ ops->create_sals_from_location_spec (locspec, &canonical,
+ search_pspace);
}
catch (const gdb_exception_error &e)
{
@@ -9560,7 +9657,7 @@ break_range_command (const char *arg, int from_tty)
arg_start = arg;
location_spec_up start_locspec
= string_to_location_spec (&arg, current_language);
- parse_breakpoint_sals (start_locspec.get (), &canonical_start);
+ parse_breakpoint_sals (start_locspec.get (), &canonical_start, nullptr);
if (arg[0] != ',')
error (_("Too few arguments."));
@@ -9661,7 +9758,7 @@ watchpoint_exp_is_const (const struct expression *exp)
/* Implement the "re_set" method for watchpoints. */
void
-watchpoint::re_set ()
+watchpoint::re_set (struct program_space *pspace)
{
/* Watchpoint can be either on expression using entirely global
variables, or it can be on local variables.
@@ -11775,7 +11872,7 @@ breakpoint::print_recreate (struct ui_file *fp) const
/* Default breakpoint_ops methods. */
void
-code_breakpoint::re_set ()
+code_breakpoint::re_set (struct program_space *pspace)
{
/* FIXME: is this still reachable? */
if (breakpoint_location_spec_empty_p (this))
@@ -11785,7 +11882,7 @@ code_breakpoint::re_set ()
return;
}
- re_set_default ();
+ re_set_default (pspace);
}
int
@@ -11991,7 +12088,7 @@ code_breakpoint::decode_location_spec (location_spec *locspec,
/* Virtual table for internal breakpoints. */
void
-internal_breakpoint::re_set ()
+internal_breakpoint::re_set (struct program_space *pspace)
{
switch (type)
{
@@ -12084,7 +12181,7 @@ internal_breakpoint::print_mention () const
/* Virtual table for momentary breakpoints */
void
-momentary_breakpoint::re_set ()
+momentary_breakpoint::re_set (struct program_space *pspace)
{
/* Keep temporary breakpoints, which can be encountered when we step
over a dlopen call and solib_add is resetting the breakpoints.
@@ -12125,12 +12222,13 @@ longjmp_breakpoint::~longjmp_breakpoint ()
static void
bkpt_probe_create_sals_from_location_spec (location_spec *locspec,
- struct linespec_result *canonical)
+ struct linespec_result *canonical,
+ struct program_space *search_pspace)
{
struct linespec_sals lsal;
- lsal.sals = parse_probes (locspec, NULL, canonical);
+ lsal.sals = parse_probes (locspec, search_pspace, canonical);
lsal.canonical = xstrdup (canonical->locspec->to_string ());
canonical->lsals.push_back (std::move (lsal));
}
@@ -12220,9 +12318,9 @@ tracepoint::print_recreate (struct ui_file *fp) const
}
void
-dprintf_breakpoint::re_set ()
+dprintf_breakpoint::re_set (struct program_space *pspace)
{
- re_set_default ();
+ re_set_default (pspace);
/* extra_string should never be non-NULL for dprintf. */
gdb_assert (extra_string != NULL);
@@ -12280,8 +12378,10 @@ dprintf_breakpoint::after_condition_true (struct bpstat *bs)
markers (`-m'). */
static void
-strace_marker_create_sals_from_location_spec (location_spec *locspec,
- struct linespec_result *canonical)
+strace_marker_create_sals_from_location_spec
+ (location_spec *locspec,
+ struct linespec_result *canonical,
+ struct program_space *search_pspace)
{
struct linespec_sals lsal;
const char *arg_start, *arg;
@@ -12797,12 +12897,32 @@ update_breakpoint_locations (code_breakpoint *b,
all locations are in the same shared library, that was unloaded.
We'd like to retain the location, so that when the library is
loaded again, we don't loose the enabled/disabled status of the
- individual locations. */
+ individual locations.
+
+ Thread specific breakpoints will also trigger this case if the thread
+ is changed to a different program space, and all of the old locations
+ go out of scope. In this case we do (currently) discard the old
+ locations -- we assume the change in thread is permanent and the old
+ locations will never come back into scope. */
if (all_locations_are_pending (b, filter_pspace) && sals.empty ())
- return;
+ {
+ if (b->thread != -1)
+ b->clear_locations ();
+ return;
+ }
bp_location_list existing_locations = b->steal_locations (filter_pspace);
+ /* If this is a thread-specific breakpoint then any locations left on the
+ breakpoint are for a program space in which the thread of interest
+ does not operate. This can happen when the user changes the thread of
+ a thread-specific breakpoint.
+
+ We assume that the change in thread is permanent, and that the old
+ locations will never be used again, so discard them now. */
+ if (b->thread != -1)
+ b->clear_locations ();
+
for (const auto &sal : sals)
{
struct bp_location *new_loc;
@@ -12968,40 +13088,45 @@ code_breakpoint::location_spec_to_sals (location_spec *locspec,
locations. */
void
-code_breakpoint::re_set_default ()
+code_breakpoint::re_set_default (struct program_space *filter_pspace)
{
- struct program_space *filter_pspace = current_program_space;
std::vector<symtab_and_line> expanded, expanded_end;
- int found;
- std::vector<symtab_and_line> sals = location_spec_to_sals (locspec.get (),
- filter_pspace,
- &found);
- if (found)
- expanded = std::move (sals);
-
- if (locspec_range_end != nullptr)
- {
- std::vector<symtab_and_line> sals_end
- = location_spec_to_sals (locspec_range_end.get (),
- filter_pspace, &found);
+ /* If this breakpoint is thread-specific then find the program space in
+ which the specific thread exists. Otherwise, for breakpoints that are
+ not thread-specific THREAD_PSPACE will be nullptr. */
+ program_space *bp_pspace
+ = find_program_space_for_breakpoint (this->thread, this->inferior);
+
+ /* If this is not a thread or inferior specific breakpoint, or it is a
+ thread or inferior specific breakpoint but we are looking for new
+ locations in the program space that the specific thread or inferior is
+ running, then look for new locations for this breakpoint. */
+ if (bp_pspace == nullptr || filter_pspace == bp_pspace)
+ {
+ int found;
+ std::vector<symtab_and_line> sals
+ = location_spec_to_sals (locspec.get (), filter_pspace, &found);
if (found)
- expanded_end = std::move (sals_end);
+ expanded = std::move (sals);
+
+ if (locspec_range_end != nullptr)
+ {
+ std::vector<symtab_and_line> sals_end
+ = location_spec_to_sals (locspec_range_end.get (),
+ filter_pspace, &found);
+ if (found)
+ expanded_end = std::move (sals_end);
+ }
}
+ /* Update the locations for this breakpoint. For thread-specific
+ breakpoints this will remove any old locations that are for the wrong
+ program space -- this can happen if the user changes the thread of a
+ thread-specific breakpoint. */
update_breakpoint_locations (this, filter_pspace, expanded, expanded_end);
}
-/* Default method for creating SALs from an address string. It basically
- calls parse_breakpoint_sals. Return 1 for success, zero for failure. */
-
-static void
-create_sals_from_location_spec_default (location_spec *locspec,
- struct linespec_result *canonical)
-{
- parse_breakpoint_sals (locspec, canonical);
-}
-
/* Re-set breakpoint locations for the current program space.
Locations bound to other program spaces are left untouched. */
@@ -13036,7 +13161,7 @@ breakpoint_re_set (void)
{
input_radix = b.input_radix;
set_language (b.language);
- b.re_set ();
+ b.re_set (current_program_space);
}
catch (const gdb_exception &ex)
{
@@ -13057,6 +13182,53 @@ breakpoint_re_set (void)
/* Now we can insert. */
update_global_location_list (UGLL_MAY_INSERT);
}
+
+/* Re-set locations for breakpoint B in FILTER_PSPACE. If FILTER_PSPACE is
+ nullptr then re-set locations for B in all program spaces. Locations
+ bound to program spaces other than FILTER_PSPACE are left untouched. */
+
+static void
+breakpoint_re_set_one (breakpoint *b, program_space *filter_pspace)
+{
+ {
+ scoped_restore_current_language save_language;
+ scoped_restore save_input_radix = make_scoped_restore (&input_radix);
+ scoped_restore_current_pspace_and_thread restore_pspace_thread;
+
+ /* To ::re_set each breakpoint we set the current_language to the
+ language of the breakpoint before re-evaluating the breakpoint's
+ location. This change can unfortunately get undone by accident if
+ the language_mode is set to auto, and we either switch frames, or
+ more likely in this context, we select the current frame.
+
+ We prevent this by temporarily turning the language_mode to
+ language_mode_manual. We restore it once all breakpoints
+ have been reset. */
+ scoped_restore save_language_mode = make_scoped_restore (&language_mode);
+ language_mode = language_mode_manual;
+
+ /* Note: we must not try to insert locations until after all
+ breakpoints have been re-set. Otherwise, e.g., when re-setting
+ breakpoint 1, we'd insert the locations of breakpoint 2, which
+ hadn't been re-set yet, and thus may have stale locations. */
+
+ try
+ {
+ input_radix = b->input_radix;
+ set_language (b->language);
+ b->re_set (filter_pspace);
+ }
+ catch (const gdb_exception &ex)
+ {
+ exception_fprintf (gdb_stderr, ex,
+ "Error in re-setting breakpoint %d: ",
+ b->number);
+ }
+ }
+
+ /* Now we can insert. */
+ update_global_location_list (UGLL_MAY_INSERT);
+}
\f
/* Reset the thread number of this breakpoint:
diff --git a/gdb/breakpoint.h b/gdb/breakpoint.h
index b37208271e4..df25cd026ff 100644
--- a/gdb/breakpoint.h
+++ b/gdb/breakpoint.h
@@ -562,15 +562,15 @@ enum print_stop_action
struct breakpoint_ops
{
- /* Create SALs from location spec, storing the result in
- linespec_result.
-
- For an explanation about the arguments, see the function
- `create_sals_from_location_spec_default'.
+ /* Create SALs from LOCSPEC, storing the result in linespec_result
+ CANONICAL. If SEARCH_PSPACE is not nullptr then only results in the
+ corresponding program space are returned. If SEARCH_PSPACE is nullptr
+ then results for all program spaces are returned.
This function is called inside `create_breakpoint'. */
void (*create_sals_from_location_spec) (location_spec *locspec,
- struct linespec_result *canonical);
+ linespec_result *canonical,
+ program_space *search_pspace);
/* This method will be responsible for creating a breakpoint given its SALs.
Usually, it just calls `create_breakpoints_sal' (for ordinary
@@ -702,8 +702,15 @@ struct breakpoint : public intrusive_list_node<breakpoint>
/* Reevaluate a breakpoint. This is necessary after symbols change
(e.g., an executable or DSO was loaded, or the inferior just
- started). */
- virtual void re_set ()
+ started).
+
+ If not nullptr, then FILTER_PSPACE is the program space in which
+ symbols may have changed, we only need to add new locations in
+ FILTER_PSPACE.
+
+ If FILTER_PSPACE is nullptr then all program spaces may have changed,
+ new locations need to be searched for in every program space. */
+ virtual void re_set (program_space *filter_pspace)
{
/* Nothing to re-set. */
}
@@ -947,7 +954,7 @@ struct code_breakpoint : public breakpoint
/* Add a location for SAL to this breakpoint. */
bp_location *add_location (const symtab_and_line &sal);
- void re_set () override;
+ void re_set (program_space *pspace) override;
int insert_location (struct bp_location *) override;
int remove_location (struct bp_location *,
enum remove_bp_reason reason) override;
@@ -969,7 +976,7 @@ struct code_breakpoint : public breakpoint
struct program_space *search_pspace);
/* Helper method that does the basic work of re_set. */
- void re_set_default ();
+ void re_set_default (program_space *pspace);
/* Find the SaL locations corresponding to the given LOCATION.
On return, FOUND will be 1 if any SaL was found, zero otherwise. */
@@ -991,7 +998,7 @@ struct watchpoint : public breakpoint
{
using breakpoint::breakpoint;
- void re_set () override;
+ void re_set (program_space *pspace) override;
int insert_location (struct bp_location *) override;
int remove_location (struct bp_location *,
enum remove_bp_reason reason) override;
diff --git a/gdb/testsuite/gdb.mi/new-ui-bp-deleted.exp b/gdb/testsuite/gdb.mi/new-ui-bp-deleted.exp
index 57e69ef6240..3afc1787026 100644
--- a/gdb/testsuite/gdb.mi/new-ui-bp-deleted.exp
+++ b/gdb/testsuite/gdb.mi/new-ui-bp-deleted.exp
@@ -76,8 +76,12 @@ foreach_mi_ui_mode mode {
set loc2 [make_bp_loc "$::decimal\\.2"]
# Create the inferior-specific breakpoint.
- mi_create_breakpoint_multi "-g i2 foo" "create breakpoint in inferior 2" \
- -inferior "2" -locations "\\\[$loc1,$loc2\\\]"
+ mi_create_breakpoint "-g i2 foo" "create breakpoint in inferior 2" \
+ -number "$decimal" \
+ -type "breakpoint" \
+ -enabled "y" \
+ -func "foo" \
+ -inferior "2"
set bpnum [mi_get_valueof "/d" "\$bpnum" "INVALID"]
if {$mode eq "separate"} {
diff --git a/gdb/testsuite/gdb.mi/user-selected-context-sync.exp b/gdb/testsuite/gdb.mi/user-selected-context-sync.exp
index 4889c31aff3..b39745bdf17 100644
--- a/gdb/testsuite/gdb.mi/user-selected-context-sync.exp
+++ b/gdb/testsuite/gdb.mi/user-selected-context-sync.exp
@@ -370,7 +370,7 @@ proc test_continue_to_start { mode inf } {
"thread $inf.2 stops MI"
} else {
mi_expect_stop "breakpoint-hit" "child_sub_function" \
- "" "$srcfile" "$decimal" {"" "disp=\"del\"" "locno=\"[0-9]+\""} \
+ "" "$srcfile" "$decimal" {"" "disp=\"del\""} \
"thread $inf.2 stops MI"
}
}
@@ -439,7 +439,7 @@ proc_with_prefix test_setup { mode } {
with_spawn_id $mi_spawn_id {
mi_expect_stop "breakpoint-hit" "main" "" "$srcfile" "$decimal" \
- {"" "disp=\"del\"" "locno=\"[0-9]+\""} "main stop"
+ {"" "disp=\"del\""} "main stop"
}
# Consume CLI output.
diff --git a/gdb/testsuite/gdb.multi/bp-thread-specific.exp b/gdb/testsuite/gdb.multi/bp-thread-specific.exp
index 85c08f44a2c..68001e92044 100644
--- a/gdb/testsuite/gdb.multi/bp-thread-specific.exp
+++ b/gdb/testsuite/gdb.multi/bp-thread-specific.exp
@@ -50,7 +50,7 @@ gdb_test "info threads" \
# locations ('foo' in both inferiors) even though only one of those
# locations will ever trigger ('foo' in inferior 2).
gdb_test "break foo thread 2.1" \
- "Breakpoint $decimal at $hex: foo\\. \\(2 locations\\)"
+ "Breakpoint $decimal at $hex: file \[^\r\n\]+$srcfile, line $decimal\\."
set bpnum [get_integer_valueof "\$bpnum" "INVALID"]
@@ -58,10 +58,7 @@ set bpnum [get_integer_valueof "\$bpnum" "INVALID"]
# earlier breakpoint. Check that the thread-id used when describing
# the earlier breakpoints is correct.
gdb_test "break foo thread 1.1" \
- [multi_line \
- "Note: breakpoint $bpnum \\(thread 2.1\\) also set at pc $hex\\." \
- "Note: breakpoint $bpnum \\(thread 2.1\\) also set at pc $hex\\." \
- "Breakpoint $decimal at $hex: foo\\. \\(2 locations\\)"]
+ "Breakpoint $decimal at $hex: file \[^\r\n\]+$srcfile, line $decimal\\."
# Save the breakpoints into a file.
if {[is_remote host]} {
diff --git a/gdb/testsuite/gdb.multi/inferior-specific-bp.exp b/gdb/testsuite/gdb.multi/inferior-specific-bp.exp
index b8aceabcad6..dda167dd39f 100644
--- a/gdb/testsuite/gdb.multi/inferior-specific-bp.exp
+++ b/gdb/testsuite/gdb.multi/inferior-specific-bp.exp
@@ -105,16 +105,8 @@ proc check_info_breakpoints { testname bp_number expected_loc_count } {
# Create an inferior-specific breakpoint. Use gdb_test instead of
# gdb_breakpoint here as we want to check the breakpoint was placed in
# multiple locations.
-#
-# Currently GDB still places inferior specific breakpoints into every
-# inferior, just like it does with thread specific breakpoints.
-# Hopefully this will change in the future, at which point, this test
-# will need updating.
-#
-# Two of these locations are in inferior 1, while the third is in
-# inferior 2.
gdb_test "break foo inferior 1" \
- "Breakpoint $decimal at $hex: foo\\. \\(3 locations\\)"
+ "Breakpoint $decimal at $hex: foo\\. \\(2 locations\\)"
set bp_number [get_integer_valueof "\$bpnum" "INVALID" \
"get b/p number for inferior specific breakpoint"]
@@ -123,7 +115,7 @@ set location_count 0
set saw_inf_cond false
check_info_breakpoints "first check for inferior specific breakpoint" \
- $bp_number 3
+ $bp_number 2
# Create a multi-inferior breakpoint to stop at.
gdb_breakpoint "stop_breakpt" message
diff --git a/gdb/testsuite/gdb.multi/multi-target-continue.exp b/gdb/testsuite/gdb.multi/multi-target-continue.exp
index bf19cc00968..a1bffb7b613 100644
--- a/gdb/testsuite/gdb.multi/multi-target-continue.exp
+++ b/gdb/testsuite/gdb.multi/multi-target-continue.exp
@@ -30,7 +30,7 @@ proc test_continue {non-stop} {
proc set_break {inf} {
gdb_test "break function${inf} thread ${inf}.1" \
- "Breakpoint .* function${inf}\\..*"
+ "Breakpoint ${::decimal} at ${::hex}: file .*, line ${::decimal}\\."
}
# Select inferior INF, and then run to a breakpoint on inferior
diff --git a/gdb/testsuite/gdb.multi/multi-target-ping-pong-next.exp b/gdb/testsuite/gdb.multi/multi-target-ping-pong-next.exp
index 64645b8ec8a..51fd70b018a 100644
--- a/gdb/testsuite/gdb.multi/multi-target-ping-pong-next.exp
+++ b/gdb/testsuite/gdb.multi/multi-target-ping-pong-next.exp
@@ -52,12 +52,12 @@ proc test_ping_pong_next {} {
gdb_test "thread 1.1" "Switching to thread 1.1 .*"
gdb_test "break $srcfile:$line1 thread 1.1" \
- "Breakpoint .*$srcfile:$line1\\..*"
+ "Breakpoint .*$srcfile, line $line1\\."
gdb_test "continue" "hit Breakpoint .*"
gdb_test "break $srcfile:$line2 thread 2.1" \
- "Breakpoint .*$srcfile:$line2\\..*"
+ "Breakpoint .*$srcfile, line $line2\\."
# Now block inferior 1 and issue "next". We should stop at the
# breakpoint for inferior 2, given schedlock off.
diff --git a/gdb/testsuite/gdb.multi/pending-bp-del-inferior.exp b/gdb/testsuite/gdb.multi/pending-bp-del-inferior.exp
index cb1f119ff94..897d4a1cf52 100644
--- a/gdb/testsuite/gdb.multi/pending-bp-del-inferior.exp
+++ b/gdb/testsuite/gdb.multi/pending-bp-del-inferior.exp
@@ -129,10 +129,8 @@ proc do_bp_test { bp_type bp_pending } {
} else {
set bp_pattern_before \
[multi_line \
- "$bp_number\\s+breakpoint\\s+keep\\s+y\\s+<MULTIPLE>\\s*" \
- "\\s+stop only in [string_to_regexp $bp_restriction]" \
- "$bp_number\\.1\\s+y\\s+$::hex in $bp_func at \[^\r\n\]+ inf 1" \
- "$bp_number\\.2\\s+y\\s+$::hex in $bp_func at \[^\r\n\]+ inf 2"]
+ "$bp_number\\s+breakpoint\\s+keep\\s+y\\s+$::hex in $bp_func at \[^\r\n\]+ inf 1" \
+ "\\s+stop only in [string_to_regexp $bp_restriction]"]
set bp_pattern_after \
[multi_line \
diff --git a/gdb/testsuite/gdb.multi/pending-bp.exp b/gdb/testsuite/gdb.multi/pending-bp.exp
index e4f0aa2e38a..16803488a7f 100644
--- a/gdb/testsuite/gdb.multi/pending-bp.exp
+++ b/gdb/testsuite/gdb.multi/pending-bp.exp
@@ -78,6 +78,48 @@ proc do_test_setup { inf_1_stop inf_2_stop } {
return true
}
+# Create a breakpoint on the function 'foo' in THREAD. It is expected
+# that the breakpoint created will be pending, this is checked by
+# running the 'info breakpoints' command.
+#
+# Returns the number for the newly created breakpoint.
+proc do_create_pending_foo_breakpoint { {thread "1.1"} } {
+ gdb_test "break foo thread $thread" \
+ [multi_line \
+ "Function \"foo\" not defined\\." \
+ "Breakpoint $::decimal \\(foo\\) pending\."] \
+ "set pending thread-specific breakpoint"
+ set bpnum [get_integer_valueof "\$bpnum" "*INVALID*" \
+ "get number for thread-specific breakpoint on foo"]
+ gdb_test "info breakpoints $bpnum" \
+ [multi_line \
+ "$bpnum\\s+breakpoint\\s+keep\\s+y\\s+<PENDING>\\s+foo" \
+ "\\s+stop only in thread [string_to_regexp $thread]"] \
+ "check thread-specific breakpoint is initially pending"
+
+ return $bpnum
+}
+
+# Create a breakpoint on the function 'foo' in THREAD. It is expected
+# that the breakpoint created will not be pending, this is checked by
+# running the 'info breakpoints' command.
+#
+# Returns the number for the newly created breakpoint.
+proc do_create_foo_breakpoint { {thread "1.1"} } {
+ gdb_test "break foo thread $thread" \
+ "Breakpoint $::decimal at $::hex" \
+ "set thread-specific breakpoint"
+ set bpnum [get_integer_valueof "\$bpnum" "*INVALID*" \
+ "get number for thread-specific breakpoint on foo"]
+ gdb_test "info breakpoints $bpnum" \
+ [multi_line \
+ "$bpnum\\s+breakpoint\\s+keep\\s+y\\s+$::hex\\s+<foo\[^>\]*> inf $::decimal" \
+ "\\s+stop only in thread [string_to_regexp $thread]"] \
+ "check thread-specific breakpoint is initially pending"
+
+ return $bpnum
+}
+
# Check that when a breakpoint is in the pending state, but that breakpoint
# does have some locations (those locations themselves are pending), GDB
# doesn't display the inferior list in the 'info breakpoints' output.
@@ -126,5 +168,169 @@ proc_with_prefix test_no_inf_display {} {
"check info breakpoints while breakpoint is pending"
}
+# Setup two inferiors. In #1 the symbol 'foo' has not yet been
+# loaded, while in #2 the symbol 'foo' has been loaded.
+#
+# Create a thread-specific breakpoint on 'foo' tied to a thread in
+# inferior #1, the breakpoint should be pending -- 'foo' is not yet
+# loaded in #1.
+#
+# Now move inferior #1 forward until 'foo' is loaded, check the
+# breakpoint is no longer pending.
+#
+# Move inferior #1 forward more until 'foo' is unloaded, check that
+# the breakpoint returns to the pending state.
+proc_with_prefix test_pending_toggle { } {
+
+ do_test_setup "Break before open" "Break before close"
+
+ set bpnum [do_create_pending_foo_breakpoint]
+
+ # Now return to inferior 1 and continue until the shared library is
+ # loaded, the breakpoint should become non-pending.
+ gdb_test "inferior 1" "Switching to inferior 1 .*" \
+ "switch back to inferior 1"
+ gdb_continue_to_breakpoint "stop in foo in inferior 1" "foo \\(\\) .*"
+
+ gdb_test "info breakpoint $bpnum" \
+ [multi_line \
+ "$bpnum\\s+breakpoint\\s+keep\\s+y\\s+$::hex <foo\[^>\]*> inf 1" \
+ "\\s+stop only in thread 1\\.1" \
+ "\\s+breakpoint already hit 1 time"] \
+ "check thread-specific breakpoint is no longer pending"
+
+ gdb_breakpoint [gdb_get_line_number "Break after close"] temporary
+ gdb_continue_to_breakpoint "close library"
+ gdb_test "info breakpoints $bpnum" \
+ [multi_line \
+ "$bpnum\\s+breakpoint\\s+keep\\s+y\\s+<PENDING>\\s+foo" \
+ "\\s+stop only in thread 1\\.1" \
+ "\\s+breakpoint already hit 1 time"] \
+ "check thread-specific breakpoint is pending again"
+}
+
+# Create a Python variable VAR and set it to the gdb.Breakpoint object
+# corresponding to the breakpoint numbered BPNUM. If THREAD is not
+# the empty string then THREAD should be an integer, check that
+# gdb.Breakpoint.thread is set to the value of THREAD. Otherwise, if
+# THREAD is the empty string, check that gdb.Breakpoint.thread is set
+# to None.
+proc py_find_breakpoint { var bpnum {thread ""} } {
+ gdb_test_no_output \
+ "python ${var}=\[b for b in gdb.breakpoints() if b.number == $bpnum\]\[0\]" \
+ "find Python gdb.Breakpoint object"
+ if { $thread ne "" } {
+ gdb_test_no_output "python assert(${var}.thread == ${thread})" \
+ "check thread attribute is currently correct"
+ } else {
+ gdb_test_no_output "python assert(${var}.thread is None)" \
+ "check thread attribute is currently correct"
+ }
+}
+
+# Setup two inferiors. In #1 the symbol 'foo' has not yet been
+# loaded, while in #2 the symbol 'foo' has been loaded.
+#
+# Create a thread-specific breakpoint on 'foo' tied to a thread in
+# inferior #1, the breakpoint should be pending -- 'foo' is not yet
+# loaded in #1.
+#
+# Use Python to change the thread of the thread-specific breakpoint to
+# a thread in inferior #2, at this point the thread should gain a
+# location and become non-pending.
+#
+# Set the thread back to a thread in inferior #1, the breakpoint
+# should return to the pending state.
+proc_with_prefix py_test_toggle_thread {} {
+ do_test_setup "Break before open" "Break after open"
+
+ set bpnum [do_create_pending_foo_breakpoint]
+
+ py_find_breakpoint "bp" $bpnum 1
+
+ gdb_test_no_output "python bp.thread = 2" \
+ "change thread on thread-specific breakpoint"
+ gdb_test "info breakpoint $bpnum" \
+ [multi_line \
+ "$bpnum\\s+breakpoint\\s+keep\\s+y\\s+$::hex <foo\[^>\]*> inf 2" \
+ "\\s+stop only in thread 2\\.1"] \
+ "check thread-specific breakpoint now has a location"
+
+ gdb_test_no_output "set call_count = 2" "set call_count in inferior 2"
+ gdb_continue_to_breakpoint "stop at foo in inferior 2" "foo \\(\\) .*"
+
+ gdb_test_no_output "python bp.thread = 1" \
+ "restore thread on thread-specific breakpoint"
+ gdb_test "info breakpoints $bpnum" \
+ [multi_line \
+ "$bpnum\\s+breakpoint\\s+keep\\s+y\\s+<PENDING>\\s+foo" \
+ "\\s+stop only in thread 1\\.1" \
+ "\\s+breakpoint already hit 1 time"] \
+ "check thread-specific breakpoint has returned to pending"
+
+ gdb_breakpoint [gdb_get_line_number "Break after close"] temporary
+ gdb_continue_to_breakpoint "stop after close in inferior 2" \
+ ".* Break after close\\. .*"
+
+ gdb_test "inferior 1" "Switching to inferior 1 .*" \
+ "switch to inferior 1"
+ gdb_continue_to_breakpoint "stop at foo in inferior 1" "foo \\(\\) .*"
+}
+
+# Setup two inferiors. Both inferiors have the symbol 'foo'
+# available.
+#
+# Create a thread-specific breakpoint on 'foo' tied to a thread in
+# inferior #1, the breakpoint should not be pending, but will only
+# have a single location, the location in inferior #1.
+#
+# Use Python to change the thread of the thread-specific breakpoint to
+# None. At this point the breakpoint should gain a second location, a
+# location in inferior #2.
+proc_with_prefix py_test_clear_thread {} {
+ do_test_setup "Break after open" "Break after open"
+
+ set bpnum [do_create_foo_breakpoint]
+
+ py_find_breakpoint "bp" $bpnum 1
+
+ gdb_test_no_output "python bp.thread = None" \
+ "clear thread on thread-specific breakpoint"
+ gdb_test "info breakpoints $bpnum" \
+ [multi_line \
+ "${bpnum}\\s+breakpoint\\s+keep y\\s+<MULTIPLE>\\s*" \
+ "${bpnum}\\.1\\s+y\\s+${::hex}\\s+<foo\[^>\]*> inf $::decimal" \
+ "${bpnum}\\.2\\s+y\\s+${::hex}\\s+<foo\[^>\]*> inf $::decimal"] \
+ "check for a location in both inferiors"
+
+ gdb_continue_to_breakpoint "stop at foo in inferior 2" "foo \\(\\) .*"
+ gdb_test_no_output "set call_count = 2" "set call_count in inferior 2"
+
+ gdb_test "inferior 1" "Switching to inferior 1 .*" \
+ "switch to inferior 1"
+ gdb_continue_to_breakpoint "stop at foo in inferior 1" "foo \\(\\) .*"
+ gdb_test_no_output "set call_count = 2" "set call_count in inferior 1"
+
+ gdb_test_no_output "python bp.thread = 2"
+ gdb_test "info breakpoints $bpnum" \
+ [multi_line \
+ "${bpnum}\\s+breakpoint\\s+keep y\\s+${::hex}\\s+<foo\[^>\]*> inf 2" \
+ "\\s+stop only in thread 2\\.1" \
+ "\\s+breakpoint already hit 2 times"] \
+ "check for a location only in inferior 2"
+
+ gdb_breakpoint [gdb_get_line_number "Break after close"] temporary
+ gdb_continue_to_breakpoint "stop after close in inferior 1" \
+ ".* Break after close\\. .*"
+
+ gdb_test "inferior 2" "Switching to inferior 2 .*" \
+ "switch back to inferior 2"
+ gdb_continue_to_breakpoint "stop at foo again in inferior 2" \
+ "foo \\(\\) .*"
+}
+
# Run all the tests.
test_no_inf_display
+test_pending_toggle
+py_test_toggle_thread
+py_test_clear_thread
diff --git a/gdb/testsuite/gdb.multi/tids.exp b/gdb/testsuite/gdb.multi/tids.exp
index 18fc4970fe7..34c270309de 100644
--- a/gdb/testsuite/gdb.multi/tids.exp
+++ b/gdb/testsuite/gdb.multi/tids.exp
@@ -433,11 +433,13 @@ if { [allow_python_tests] } {
gdb_py_test_silent_cmd "python bp = gdb.breakpoints()\[0\]" \
"get python breakpoint" 0
- gdb_test "python bp.thread = 6" "thread = 6" \
+ gdb_test_no_output "python bp.thread = 6" \
"make breakpoint thread-specific with python"
# Check that the inferior-qualified ID is correct.
gdb_test "info breakpoint" \
- "stop only in thread 1.3\r\n.*" \
+ [multi_line \
+ "$decimal\\s+\[^\r\n\]+ in thread_function1 at \[^\r\n\]+" \
+ "\\s+stop only in thread 1\\.3"] \
"thread specific breakpoint right thread"
}
}
--
2.25.4
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCHv6 09/10] gdb: remove tracepoint_probe_create_sals_from_location_spec
2023-12-02 10:42 ` [PATCHv6 " Andrew Burgess
@ 2023-12-02 10:42 ` Andrew Burgess
0 siblings, 0 replies; 12+ messages in thread
From: Andrew Burgess @ 2023-12-02 10:42 UTC (permalink / raw)
To: gdb-patches; +Cc: Andrew Burgess
The tracepoint_probe_create_sals_from_location_spec function just
forwards all its arguments to
bkpt_probe_create_sals_from_location_spec, and is only used in one
place.
Lets delete tracepoint_probe_create_sals_from_location_spec and
replace it with bkpt_probe_create_sals_from_location_spec.
There should be no user visible changes after this commit.
---
gdb/breakpoint.c | 19 +++----------------
1 file changed, 3 insertions(+), 16 deletions(-)
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 7ca3377150d..7590cd7248c 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -284,9 +284,6 @@ static bool strace_marker_p (struct breakpoint *b);
static void bkpt_probe_create_sals_from_location_spec
(location_spec *locspec,
struct linespec_result *canonical);
-static void tracepoint_probe_create_sals_from_location_spec
- (location_spec *locspec,
- struct linespec_result *canonical);
const struct breakpoint_ops code_breakpoint_ops =
{
@@ -301,10 +298,11 @@ static const struct breakpoint_ops bkpt_probe_breakpoint_ops =
create_breakpoints_sal,
};
-/* Tracepoints set on probes. */
+/* Tracepoints set on probes. We use the same methods as for breakpoints
+ on probes. */
static const struct breakpoint_ops tracepoint_probe_breakpoint_ops =
{
- tracepoint_probe_create_sals_from_location_spec,
+ bkpt_probe_create_sals_from_location_spec,
create_breakpoints_sal,
};
@@ -12218,17 +12216,6 @@ tracepoint::print_recreate (struct ui_file *fp) const
gdb_printf (fp, " passcount %d\n", pass_count);
}
-/* Virtual table for tracepoints on static probes. */
-
-static void
-tracepoint_probe_create_sals_from_location_spec
- (location_spec *locspec,
- struct linespec_result *canonical)
-{
- /* We use the same method for breakpoint on probes. */
- bkpt_probe_create_sals_from_location_spec (locspec, canonical);
-}
-
void
dprintf_breakpoint::re_set ()
{
--
2.25.4
^ permalink raw reply [flat|nested] 12+ messages in thread
end of thread, other threads:[~2023-12-02 10:42 UTC | newest]
Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <id:cover.1696368409.git.aburgess@redhat.com>
2023-10-30 16:11 ` [PATCHv6 00/10] thread-specific breakpoints in just some inferiors Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 01/10] gdb: create_breakpoint: add asserts and additional comments Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 02/10] gdb: create_breakpoint: asserts relating to extra_string/parse_extra Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 03/10] gdb: change 'if' to gdb_assert in update_dprintf_command_list Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 04/10] gdb: build dprintf commands just once in code_breakpoint constructor Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 05/10] gdb: don't display inferior list for pending breakpoints Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 06/10] gdb: parse pending breakpoint thread/task immediately Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 07/10] gdb: don't set breakpoint::pspace for in create_breakpoint Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 08/10] gdb: remove breakpoint_re_set_one Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 09/10] gdb: remove tracepoint_probe_create_sals_from_location_spec Andrew Burgess
2023-10-30 16:11 ` [PATCHv6 10/10] gdb: only insert thread-specific breakpoints in the relevant inferior Andrew Burgess
2023-10-03 21:29 [PATCHv5 00/10] thread-specific breakpoints in just some inferiors Andrew Burgess
2023-12-02 10:42 ` [PATCHv6 " Andrew Burgess
2023-12-02 10:42 ` [PATCHv6 09/10] gdb: remove tracepoint_probe_create_sals_from_location_spec Andrew Burgess
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