From: Tom de Vries <tdevries@suse.de>
To: gdb-patches@sourceware.org
Cc: Ulrich Weigand <Ulrich.Weigand@de.ibm.com>,
Carl Love <cel@linux.ibm.com>
Subject: [PATCH] [gdb/testsuite] Fix gdb.dwarf2/dw2-entry-points.exp on ppc64le
Date: Thu, 11 Jan 2024 13:42:11 +0100 [thread overview]
Message-ID: <20240111124211.19244-1-tdevries@suse.de> (raw)
On ppc64le-linux, I run into:
...
(gdb) bt^M
#0 0x00000000100006dc in foobar (J=2)^M
#1 0x000000001000070c in prog ()^M
(gdb) FAIL: gdb.dwarf2/dw2-entry-points.exp: bt foo
...
The test-case attemps to emulate additional entry points of a function, with
function bar having entry points foo and foobar:
...
(gdb) p bar
$1 = {void (int, int)} 0x1000064c <bar>
(gdb) p foo
$2 = {void (int, int)} 0x10000698 <foo>
(gdb) p foobar
$3 = {void (int)} 0x100006d0 <foobar>
...
However, when setting a breakpoint on the entry point foo:
...
(gdb) b foo
Breakpoint 1 at 0x100006dc
...
it ends up in foobar instead of in foo, due to prologue skipping, and
consequently the backtrace show foobar instead foo.
The problem is that the test-case does not emulate an actual prologue at each
entry point.
Fix this by disabling the prologue skipping when setting a breakpoint, using
"break *foo".
Tested on ppc64le-linux and x86_64-linux.
PR testsuite/31232
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31232
---
gdb/testsuite/gdb.dwarf2/dw2-entry-points.exp | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-entry-points.exp b/gdb/testsuite/gdb.dwarf2/dw2-entry-points.exp
index f361820f72f..035b15ee087 100644
--- a/gdb/testsuite/gdb.dwarf2/dw2-entry-points.exp
+++ b/gdb/testsuite/gdb.dwarf2/dw2-entry-points.exp
@@ -180,8 +180,8 @@ if ![runto_main] {
}
# Try whether we can set and hit breakpoints at the entry_points.
-gdb_breakpoint "foo"
-gdb_breakpoint "foobar"
+gdb_breakpoint "*foo"
+gdb_breakpoint "*foobar"
# Now hit the entry_point break point and check their call-stack.
gdb_continue_to_breakpoint "foo"
@@ -204,7 +204,7 @@ if ![runto_main] {
return -1
}
-gdb_breakpoint "fooso"
+gdb_breakpoint "*fooso"
gdb_continue_to_breakpoint "foo_so"
gdb_test "bt" [multi_line \
base-commit: 4ece39c56cfdd5647d4061f3c084b9de6f9e443c
--
2.35.3
next reply other threads:[~2024-01-11 12:41 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-11 12:42 Tom de Vries [this message]
2024-01-11 12:55 ` Guinevere Larsen
2024-01-11 13:08 ` Tom de Vries
2024-01-11 13:33 ` Guinevere Larsen
2024-01-11 15:01 ` Ulrich Weigand
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