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* [binutils-gdb] Fix debugging of WOW64 processes
@ 2020-04-10 11:02 Hannes Domani
0 siblings, 0 replies; only message in thread
From: Hannes Domani @ 2020-04-10 11:02 UTC (permalink / raw)
To: gdb-cvs
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=13302e956fb7a0c700f53f16d985c9e6207e331c
commit 13302e956fb7a0c700f53f16d985c9e6207e331c
Author: Hannes Domani <ssbssa@yahoo.de>
Date: Thu Apr 9 16:33:20 2020 +0200
Fix debugging of WOW64 processes
The new code regarding pending stops only checks for EXCEPTION_BREAKPOINT,
but for WOW64 processes STATUS_WX86_BREAKPOINT is necessary as well.
Also, ignore_first_breakpoint is used now in nat/windows-nat.c as well,
but was not available there.
gdb/ChangeLog:
2020-04-10 Hannes Domani <ssbssa@yahoo.de>
* nat/windows-nat.c (STATUS_WX86_BREAKPOINT, STATUS_WX86_SINGLE_STEP):
Move to...
* nat/windows-nat.h (STATUS_WX86_BREAKPOINT, STATUS_WX86_SINGLE_STEP):
... here.
* windows-nat.c (windows_nat_target::get_windows_debug_event):
Check for STATUS_WX86_BREAKPOINT.
(windows_nat_target::wait): Same.
Diff:
---
gdb/ChangeLog | 10 ++++++++++
gdb/nat/windows-nat.c | 7 ++++---
gdb/nat/windows-nat.h | 8 ++++++++
gdb/windows-nat.c | 13 ++++++++-----
4 files changed, 30 insertions(+), 8 deletions(-)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 2c347fc473d..a961511b46c 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,13 @@
+2020-04-10 Hannes Domani <ssbssa@yahoo.de>
+
+ * nat/windows-nat.c (STATUS_WX86_BREAKPOINT, STATUS_WX86_SINGLE_STEP):
+ Move to...
+ * nat/windows-nat.h (STATUS_WX86_BREAKPOINT, STATUS_WX86_SINGLE_STEP):
+ ... here.
+ * windows-nat.c (windows_nat_target::get_windows_debug_event):
+ Check for STATUS_WX86_BREAKPOINT.
+ (windows_nat_target::wait): Same.
+
2020-04-10 Tom de Vries <tdevries@suse.de>
PR cli/25808
diff --git a/gdb/nat/windows-nat.c b/gdb/nat/windows-nat.c
index 94e7f572c0a..cd7c1d177c6 100644
--- a/gdb/nat/windows-nat.c
+++ b/gdb/nat/windows-nat.c
@@ -20,9 +20,6 @@
#include "nat/windows-nat.h"
#include "gdbsupport/common-debug.h"
-#define STATUS_WX86_BREAKPOINT 0x4000001F
-#define STATUS_WX86_SINGLE_STEP 0x4000001E
-
namespace windows_nat
{
@@ -44,6 +41,10 @@ DWORD desired_stop_thread_id = -1;
std::vector<pending_stop> pending_stops;
EXCEPTION_RECORD siginfo_er;
+#ifdef __x86_64__
+bool ignore_first_breakpoint = false;
+#endif
+
/* Note that 'debug_events' must be locally defined in the relevant
functions. */
#define DEBUG_EVENTS(x) if (debug_events) debug_printf x
diff --git a/gdb/nat/windows-nat.h b/gdb/nat/windows-nat.h
index 0597120c218..aea1519672d 100644
--- a/gdb/nat/windows-nat.h
+++ b/gdb/nat/windows-nat.h
@@ -25,6 +25,9 @@
#include "gdbsupport/gdb_optional.h"
#include "target/waitstatus.h"
+#define STATUS_WX86_BREAKPOINT 0x4000001F
+#define STATUS_WX86_SINGLE_STEP 0x4000001E
+
namespace windows_nat
{
@@ -202,6 +205,11 @@ extern std::vector<pending_stop> pending_stops;
/* Contents of $_siginfo */
extern EXCEPTION_RECORD siginfo_er;
+#ifdef __x86_64__
+/* Ignore first breakpoint exception of WOW64 process */
+extern bool ignore_first_breakpoint;
+#endif
+
/* Return the name of the DLL referenced by H at ADDRESS. UNICODE
determines what sort of string is read from the inferior. Returns
the name of the DLL, or NULL on error. If a name is returned, it
diff --git a/gdb/windows-nat.c b/gdb/windows-nat.c
index cdaca8d0cbf..881240c6934 100644
--- a/gdb/windows-nat.c
+++ b/gdb/windows-nat.c
@@ -235,7 +235,6 @@ static int saw_create;
static int open_process_used = 0;
#ifdef __x86_64__
static bool wow64_process = false;
-static bool ignore_first_breakpoint = false;
#endif
/* User options. */
@@ -1721,8 +1720,10 @@ windows_nat_target::get_windows_debug_event (int pid,
thread_id, desired_stop_thread_id));
if (current_event.dwDebugEventCode == EXCEPTION_DEBUG_EVENT
- && (current_event.u.Exception.ExceptionRecord.ExceptionCode
- == EXCEPTION_BREAKPOINT)
+ && ((current_event.u.Exception.ExceptionRecord.ExceptionCode
+ == EXCEPTION_BREAKPOINT)
+ || (current_event.u.Exception.ExceptionRecord.ExceptionCode
+ == STATUS_WX86_BREAKPOINT))
&& windows_initialization_done)
{
ptid_t ptid = ptid_t (current_event.dwProcessId, thread_id, 0);
@@ -1801,8 +1802,10 @@ windows_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus,
{
current_windows_thread->stopped_at_software_breakpoint = false;
if (current_event.dwDebugEventCode == EXCEPTION_DEBUG_EVENT
- && (current_event.u.Exception.ExceptionRecord.ExceptionCode
- == EXCEPTION_BREAKPOINT)
+ && ((current_event.u.Exception.ExceptionRecord.ExceptionCode
+ == EXCEPTION_BREAKPOINT)
+ || (current_event.u.Exception.ExceptionRecord.ExceptionCode
+ == STATUS_WX86_BREAKPOINT))
&& windows_initialization_done)
current_windows_thread->stopped_at_software_breakpoint = true;
}
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