Fix regression accessing errno from a core file (RH BZ 1166549).
This commit is contained in:
Jan Kratochvil
parent
4fb72aaac3
commit
a79edc166a
@ -22,6 +22,8 @@ for the most common under-ggdb3 compiled programs.
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Original patch hooked into target_translate_tls_address. But its inferior
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call invalidates `struct frame *' in the callers - RH BZ 690908.
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https://bugzilla.redhat.com/show_bug.cgi?id=1166549
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2007-11-03 Jan Kratochvil <jan.kratochvil@redhat.com>
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@ -32,23 +34,23 @@ glibc-debuginfo-2.7-2.x86_64: /usr/lib/debug/lib64/libc.so.6.debug:
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<81a2> DW_AT_name : (indirect string, offset: 0x280e): __errno_location
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<81a8> DW_AT_MIPS_linkage_name: (indirect string, offset: 0x2808): *__GI___errno_location
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Index: gdb-7.6.50.20130731-cvs/gdb/printcmd.c
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Index: gdb-7.8.1/gdb/printcmd.c
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===================================================================
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--- gdb-7.6.50.20130731-cvs.orig/gdb/printcmd.c 2013-08-02 16:21:13.665758324 +0200
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+++ gdb-7.6.50.20130731-cvs/gdb/printcmd.c 2013-08-02 16:22:24.367853322 +0200
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@@ -982,6 +982,8 @@ print_command_1 (const char *exp, int vo
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--- gdb-7.8.1.orig/gdb/printcmd.c 2014-11-21 19:05:44.699959209 +0100
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+++ gdb-7.8.1/gdb/printcmd.c 2014-11-21 19:05:44.868959291 +0100
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@@ -980,6 +980,8 @@ print_command_1 (const char *exp, int vo
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if (exp && *exp)
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{
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+ if (strcmp (exp, "errno") == 0)
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+ if (target_has_execution && strcmp (exp, "errno") == 0)
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+ exp = "*((int *(*) (void)) __errno_location) ()";
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expr = parse_expression (exp);
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make_cleanup (free_current_contents, &expr);
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val = evaluate_expression (expr);
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Index: gdb-7.6.50.20130731-cvs/gdb/testsuite/gdb.dwarf2/dw2-errno.c
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Index: gdb-7.8.1/gdb/testsuite/gdb.dwarf2/dw2-errno.c
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===================================================================
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--- /dev/null 1970-01-01 00:00:00.000000000 +0000
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+++ gdb-7.6.50.20130731-cvs/gdb/testsuite/gdb.dwarf2/dw2-errno.c 2013-08-02 16:21:13.665758324 +0200
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+++ gdb-7.8.1/gdb/testsuite/gdb.dwarf2/dw2-errno.c 2014-11-21 19:05:44.869959291 +0100
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@@ -0,0 +1,28 @@
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+/* This testcase is part of GDB, the GNU debugger.
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+
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@ -78,10 +80,10 @@ Index: gdb-7.6.50.20130731-cvs/gdb/testsuite/gdb.dwarf2/dw2-errno.c
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+
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+ return 0; /* breakpoint */
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+}
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Index: gdb-7.6.50.20130731-cvs/gdb/testsuite/gdb.dwarf2/dw2-errno.exp
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Index: gdb-7.8.1/gdb/testsuite/gdb.dwarf2/dw2-errno.exp
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===================================================================
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--- /dev/null 1970-01-01 00:00:00.000000000 +0000
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+++ gdb-7.6.50.20130731-cvs/gdb/testsuite/gdb.dwarf2/dw2-errno.exp 2013-08-02 16:21:13.665758324 +0200
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+++ gdb-7.8.1/gdb/testsuite/gdb.dwarf2/dw2-errno.exp 2014-11-21 19:05:44.869959291 +0100
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@@ -0,0 +1,60 @@
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+# Copyright 2007 Free Software Foundation, Inc.
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+
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@ -143,3 +145,117 @@ Index: gdb-7.6.50.20130731-cvs/gdb/testsuite/gdb.dwarf2/dw2-errno.exp
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+
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+# TODO: Test the error on resolving ERRNO with only libc loaded.
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+# Just how to find the current libc filename?
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Index: gdb-7.8.1/gdb/testsuite/gdb.dwarf2/dw2-errno2.c
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===================================================================
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--- /dev/null 1970-01-01 00:00:00.000000000 +0000
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+++ gdb-7.8.1/gdb/testsuite/gdb.dwarf2/dw2-errno2.c 2014-11-21 19:05:44.869959291 +0100
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@@ -0,0 +1,28 @@
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+/* This testcase is part of GDB, the GNU debugger.
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+
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+ Copyright 2005, 2007 Free Software Foundation, Inc.
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+
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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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+
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+ Please email any bugs, comments, and/or additions to this file to:
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+ bug-gdb@prep.ai.mit.edu */
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+
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+#include <errno.h>
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+
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+int main()
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+{
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+ errno = 42;
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+
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+ return 0; /* breakpoint */
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+}
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Index: gdb-7.8.1/gdb/testsuite/gdb.dwarf2/dw2-errno2.exp
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===================================================================
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--- /dev/null 1970-01-01 00:00:00.000000000 +0000
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+++ gdb-7.8.1/gdb/testsuite/gdb.dwarf2/dw2-errno2.exp 2014-11-21 19:13:01.553171326 +0100
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@@ -0,0 +1,76 @@
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+# Copyright 2007 Free Software Foundation, Inc.
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+
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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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+
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+set testfile dw2-errno2
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+set srcfile ${testfile}.c
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+set binfile ${objdir}/${subdir}/${testfile}
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+
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+proc prep { message {do_xfail 0} } { with_test_prefix $message {
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+ global srcdir subdir binfile variant
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+ gdb_exit
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+ gdb_start
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+ gdb_reinitialize_dir $srcdir/$subdir
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+ gdb_load ${binfile}${variant}
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+
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+ runto_main
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+
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+ gdb_breakpoint [gdb_get_line_number "breakpoint"]
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+ gdb_continue_to_breakpoint "breakpoint"
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+
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+ gdb_test "gcore ${binfile}${variant}.core" "\r\nSaved corefile .*" "gcore $variant"
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+
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+ gdb_test "print errno" ".* = 42"
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+
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+ gdb_test "kill" ".*" "kill" {Kill the program being debugged\? \(y or n\) } "y"
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+ gdb_test "core-file ${binfile}${variant}.core" "\r\nCore was generated by .*" "core-file"
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+ if $do_xfail {
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+ setup_xfail "*-*-*"
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+ }
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+ gdb_test "print errno" ".* = 42" "print errno for core"
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+}}
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+
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+set variant g2thrN
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+if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}${variant}" executable "additional_flags=-g2"] != "" } {
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+ untested "Couldn't compile test program"
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+ return -1
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+}
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+prep "macros=N threads=N" 1
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+
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+set variant g3thrN
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+if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}${variant}" executable "additional_flags=-g3"] != "" } {
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+ untested "Couldn't compile test program"
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+ return -1
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+}
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+prep "macros=Y threads=N" 1
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+
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+set variant g2thrY
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+if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}${variant}" executable "additional_flags=-g2"] != "" } {
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+ return -1
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+}
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+# FIXME: Why?
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+set do_xfail 0
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+if { [istarget x86_64-*-* ] && ![is_lp64_target] } {
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+ set do_xfail 1
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+}
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+prep "macros=N threads=Y" $do_xfail
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+
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+set variant g3thrY
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+if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}${variant}" executable "additional_flags=-g3"] != "" } {
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+ return -1
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+}
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+prep "macros=Y threads=Y" 1
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+
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+# TODO: Test the error on resolving ERRNO with only libc loaded.
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+# Just how to find the current libc filename?
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5
gdb.spec
5
gdb.spec
@ -26,7 +26,7 @@ Version: 7.8.1
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# The release always contains a leading reserved number, start it at 1.
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# `upstream' is not a part of `name' to stay fully rpm dependencies compatible for the testing.
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Release: 32%{?dist}
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Release: 33%{?dist}
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License: GPLv3+ and GPLv3+ with exceptions and GPLv2+ and GPLv2+ with exceptions and GPL+ and LGPLv2+ and BSD and Public Domain and GFDL
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Group: Development/Debuggers
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@ -1334,6 +1334,9 @@ then
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fi
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%changelog
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* Fri Nov 21 2014 Jan Kratochvil <jan.kratochvil@redhat.com> - 7.8.1-33.fc21
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- Fix regression accessing errno from a core file (RH BZ 1166549).
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* Thu Nov 20 2014 Sergio Durigan Junior <sergiodj@redhat.com> - 7.8.1-32.fc21
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- Fix 'Unowned dir /usr/include/gdb/' (RH BZ 1164991).
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