Fix a crash in jit.c
A user at Mozilla pointed out a crash in jit.c. In his situation, an inferior using the JIT API exec'd an executable that did not use it. This caused an assertion failure when jit.c:free_objfile_data called delete_breakpoint with NULL. This patch fixes the problem in the obvious way. New test case included. gdb/ChangeLog 2018-12-28 Tom Tromey <tom@tromey.com> * jit.c (free_objfile_data): Only delete breakpoint if non-null. gdb/testsuite/ChangeLog 2018-12-28 Tom Tromey <tom@tromey.com> Simon Marchi <simark@simark.ca> * gdb.base/jit-exec.exp: New file. * gdb.base/jit-exec.c: New file. * gdb.base/jit-execd.c: New file.
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@ -1,3 +1,7 @@
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2018-12-28 Tom Tromey <tom@tromey.com>
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* jit.c (free_objfile_data): Only delete breakpoint if non-null.
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2018-12-28 Tom Tromey <tom@tromey.com>
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* NEWS: Mention terminal styling.
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@ -1464,7 +1464,8 @@ free_objfile_data (struct objfile *objfile, void *data)
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if (ps_data != NULL && ps_data->objfile == objfile)
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{
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ps_data->objfile = NULL;
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delete_breakpoint (ps_data->jit_breakpoint);
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if (ps_data->jit_breakpoint != NULL)
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delete_breakpoint (ps_data->jit_breakpoint);
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ps_data->cached_code_address = 0;
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}
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}
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@ -1,3 +1,10 @@
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2018-12-28 Tom Tromey <tom@tromey.com>
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Simon Marchi <simark@simark.ca>
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* gdb.base/jit-exec.exp: New file.
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* gdb.base/jit-exec.c: New file.
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* gdb.base/jit-execd.c: New file.
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2018-12-28 Tom Tromey <tom@tromey.com>
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* gdb.base/style.exp: Update test to check for address styling.
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28
gdb/testsuite/gdb.base/jit-exec.c
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28
gdb/testsuite/gdb.base/jit-exec.c
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/* This testcase is part of GDB, the GNU debugger.
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Copyright 2018 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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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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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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/* Simple standalone program using the JIT API. */
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#include "jit-simple-jit.c"
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#include <unistd.h>
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int
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main (int argc, char **argv)
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{
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execl (PROGRAM, PROGRAM, (char *) 0);
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return 99;
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}
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52
gdb/testsuite/gdb.base/jit-exec.exp
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52
gdb/testsuite/gdb.base/jit-exec.exp
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# Copyright 2018 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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# Regression test for a jit.c bug. Previously it would crash if an
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# inferior that used the JIT API then exec'd a program that did not
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# use it.
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if { ![istarget "*-linux*"] } then {
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return
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}
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standard_testfile jit-exec.c
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set testfile2 "jit-execd"
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set srcfile2 ${testfile2}.c
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set binfile2 [standard_output_file ${testfile2}]
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set compile_options [list debug additional_flags=-DPROGRAM=\"$binfile2\"]
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if {[gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" \
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executable $compile_options] != ""} {
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untested "failed to compile"
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return -1
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}
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if {[gdb_compile "${srcdir}/${subdir}/${srcfile2}" "${binfile2}" \
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executable $compile_options] != ""} {
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untested "failed to compile"
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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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fail "can't run to main"
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return
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}
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delete_breakpoints
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gdb_test "continue" "Inferior .* exited normally.*"
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22
gdb/testsuite/gdb.base/jit-execd.c
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22
gdb/testsuite/gdb.base/jit-execd.c
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/* This testcase is part of GDB, the GNU debugger.
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Copyright 2018 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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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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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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int
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main (int argc, char **argv)
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{
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return 0;
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}
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