a594760181
This is just a testcase addition that I am proposing for upstream GDB.
We have this in our internal tree, and the related RH bug is:
<https://bugzilla.redhat.com/show_bug.cgi?id=809179>
(You might not be able to see all the comments without privileges.)
This bug is about a global variable that got incorrectly displayed by
GDB. This bug has already been fixed a long time ago by Joel's
commit:
commit 19630284f5
Author: Joel Brobecker <brobecker@gnat.com>
Date: Tue Jun 5 13:50:50 2012 +0000
But I think a testcase for it wouldn't hurt.
So, consider the following scenario:
$ cat solib1.c
int test;
void c_main (void)
{
test = 42;
}
$ cat solib2.c
int test;
void b_main (void)
{
test = 42;
}
$ cat main.c
int main (int argc, char *argv[])
{
c_main ();
b_main ();
return 0;
}
$ gcc -g -fPIC -shared -o libSO1.so -c solib1.c
$ gcc -g -fPIC -shared -o libSO2.so -c solib2.c
$ gcc -g -o main -L$PWD -lSO1 -lSO2 main.c
$ LD_LIBRARY_PATH=. gdb -q -batch -ex 'b c_main' -ex r -ex n -ex 'p test' ./main
...
$1 = 0
This happened with GDB before Joel's commit above. Now, things work
and GDB is able to correctly display the nested global variable:
$ LD_LIBRARY_PATH=. gdb -q -batch -ex 'b c_main' -ex r -ex n -ex 'p test' ./main
...
$1 = 42
The testcase attached tests this behavior.
gdb/testsuite/ChangeLog:
2014-09-16 Sergio Durigan Junior <sergiodj@redhat.com>
* gdb.base/global-var-nested-by-dso-solib1.c: New file.
* gdb.base/global-var-nested-by-dso-solib2.c: Likewise.
* gdb.base/global-var-nested-by-dso.c: Likewise.
* gdb.base/global-var-nested-by-dso.exp: Likewise.
55 lines
1.6 KiB
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55 lines
1.6 KiB
Text
# Copyright 2014 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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if { [skip_shlib_tests] } {
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return 0
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}
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standard_testfile
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set lib1name $testfile-solib1
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set srcfile_lib1 $srcdir/$subdir/$lib1name.c
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set binfile_lib1 [standard_output_file $lib1name.so]
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set lib2name $testfile-solib2
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set srcfile_lib2 $srcdir/$subdir/$lib2name.c
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set binfile_lib2 [standard_output_file $lib2name.so]
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if { [gdb_compile_shlib $srcfile_lib1 $binfile_lib1 \
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[list debug additional_flags=-fPIC]] != "" } {
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untested "Could not compile $binfile_lib1."
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return -1
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}
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if { [gdb_compile_shlib $srcfile_lib2 $binfile_lib2 \
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[list debug additional_flags=-fPIC]] != "" } {
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untested "Could not compile $binfile_lib2."
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return -1
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}
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if { [gdb_compile $srcdir/$subdir/$srcfile $binfile executable \
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[list debug shlib=$binfile_lib1 shlib=$binfile_lib2]] != "" } {
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return -1
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}
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clean_restart $binfile
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if { ![runto_main] } {
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return -1
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}
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gdb_test "next" "$decimal.*b_main \\(\\);"
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gdb_test "next" "$decimal.*return 0;"
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gdb_test "print test" " = 42"
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