diff options
Diffstat (limited to 'gdb-6.5-bz185337-resolve-tls-without-debuginfo-v2.patch')
| -rw-r--r-- | gdb-6.5-bz185337-resolve-tls-without-debuginfo-v2.patch | 265 |
1 files changed, 265 insertions, 0 deletions
diff --git a/gdb-6.5-bz185337-resolve-tls-without-debuginfo-v2.patch b/gdb-6.5-bz185337-resolve-tls-without-debuginfo-v2.patch new file mode 100644 index 0000000..ab64f7f --- /dev/null +++ b/gdb-6.5-bz185337-resolve-tls-without-debuginfo-v2.patch @@ -0,0 +1,265 @@ +From FEDORA_PATCHES Mon Sep 17 00:00:00 2001 +From: Jan Kratochvil <jan.kratochvil@redhat.com> +Date: Fri, 27 Oct 2017 21:07:50 +0200 +Subject: gdb-6.5-bz185337-resolve-tls-without-debuginfo-v2.patch + +;; Support TLS symbols (+`errno' suggestion if no pthread is found) (BZ 185337). +;;=push+jan: It should be replaced by Infinity project. + +https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=185337 + +2008-02-24 Jan Kratochvil <jan.kratochvil@redhat.com> + + Port to GDB-6.8pre. + +currently for trivial nonthreaded helloworld with no debug info up to -ggdb2 you +will get: + (gdb) p errno + [some error] + +* with -ggdb2 and less "errno" in fact does not exist anywhere as it was + compiled to "(*__errno_location ())" and the macro definition is not present. + Unfortunately gdb will find the TLS symbol and it will try to access it but + as the program has been compiled without -lpthread the TLS base register + (%gs on i386) is not setup and it will result in: + Cannot access memory at address 0x8 + +Attached suggestion patch how to deal with the most common "errno" symbol +for the most common under-ggdb3 compiled programs. + +Original patch hooked into target_translate_tls_address. But its inferior +call invalidates `struct frame *' in the callers - RH BZ 690908. + +https://bugzilla.redhat.com/show_bug.cgi?id=1166549 + +2007-11-03 Jan Kratochvil <jan.kratochvil@redhat.com> + + * ./gdb/dwarf2read.c (read_partial_die, dwarf2_linkage_name): Prefer + DW_AT_MIPS_linkage_name over DW_AT_name now only for non-C. + +glibc-debuginfo-2.7-2.x86_64: /usr/lib/debug/lib64/libc.so.6.debug: + <81a2> DW_AT_name : (indirect string, offset: 0x280e): __errno_location + <81a8> DW_AT_MIPS_linkage_name: (indirect string, offset: 0x2808): *__GI___errno_location + +diff --git a/gdb/printcmd.c b/gdb/printcmd.c +--- a/gdb/printcmd.c ++++ b/gdb/printcmd.c +@@ -1308,6 +1308,11 @@ process_print_command_args (const char *args, value_print_options *print_opts, + + if (exp != nullptr && *exp) + { ++ /* '*((int *(*) (void)) __errno_location) ()' is incompatible with ++ function descriptors. */ ++ if (target_has_execution () && strcmp (exp, "errno") == 0) ++ exp = "*(*(int *(*)(void)) __errno_location) ()"; ++ + /* This setting allows large arrays to be printed by limiting the + number of elements that are loaded into GDB's memory; we only + need to load as many array elements as we plan to print. */ +diff --git a/gdb/testsuite/gdb.dwarf2/dw2-errno.c b/gdb/testsuite/gdb.dwarf2/dw2-errno.c +new file mode 100644 +--- /dev/null ++++ b/gdb/testsuite/gdb.dwarf2/dw2-errno.c +@@ -0,0 +1,28 @@ ++/* This testcase is part of GDB, the GNU debugger. ++ ++ Copyright 2005, 2007 Free Software Foundation, Inc. ++ ++ This program is free software; you can redistribute it and/or modify ++ it under the terms of the GNU General Public License as published by ++ the Free Software Foundation; either version 3 of the License, or ++ (at your option) any later version. ++ ++ This program is distributed in the hope that it will be useful, ++ but WITHOUT ANY WARRANTY; without even the implied warranty of ++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ GNU General Public License for more details. ++ ++ You should have received a copy of the GNU General Public License ++ along with this program. If not, see <http://www.gnu.org/licenses/>. ++ ++ Please email any bugs, comments, and/or additions to this file to: ++ bug-gdb@prep.ai.mit.edu */ ++ ++#include <errno.h> ++ ++int main() ++{ ++ errno = 42; ++ ++ return 0; /* breakpoint */ ++} +diff --git a/gdb/testsuite/gdb.dwarf2/dw2-errno.exp b/gdb/testsuite/gdb.dwarf2/dw2-errno.exp +new file mode 100644 +--- /dev/null ++++ b/gdb/testsuite/gdb.dwarf2/dw2-errno.exp +@@ -0,0 +1,60 @@ ++# Copyright 2007 Free Software Foundation, Inc. ++ ++# This program is free software; you can redistribute it and/or modify ++# it under the terms of the GNU General Public License as published by ++# the Free Software Foundation; either version 3 of the License, or ++# (at your option) any later version. ++# ++# This program is distributed in the hope that it will be useful, ++# but WITHOUT ANY WARRANTY; without even the implied warranty of ++# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++# GNU General Public License for more details. ++# ++# You should have received a copy of the GNU General Public License ++# along with this program. If not, see <http://www.gnu.org/licenses/>. ++ ++set testfile dw2-errno ++set srcfile ${testfile}.c ++set binfile [standard_output_file ${testfile}] ++ ++proc prep {} { ++ global srcdir subdir binfile ++ gdb_exit ++ gdb_start ++ gdb_reinitialize_dir $srcdir/$subdir ++ gdb_load ${binfile} ++ ++ runto_main ++ ++ gdb_breakpoint [gdb_get_line_number "breakpoint"] ++ gdb_continue_to_breakpoint "breakpoint" ++} ++ ++if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable "additional_flags=-g2"] != "" } { ++ untested "Couldn't compile test program" ++ return -1 ++} ++prep ++gdb_test "print errno" ".* = 42" "errno with macros=N threads=N" ++ ++if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable "additional_flags=-g3"] != "" } { ++ untested "Couldn't compile test program" ++ return -1 ++} ++prep ++gdb_test "print errno" ".* = 42" "errno with macros=Y threads=N" ++ ++if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable "additional_flags=-g2"] != "" } { ++ return -1 ++} ++prep ++gdb_test "print errno" ".* = 42" "errno with macros=N threads=Y" ++ ++if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable "additional_flags=-g3"] != "" } { ++ return -1 ++} ++prep ++gdb_test "print errno" ".* = 42" "errno with macros=Y threads=Y" ++ ++# TODO: Test the error on resolving ERRNO with only libc loaded. ++# Just how to find the current libc filename? +diff --git a/gdb/testsuite/gdb.dwarf2/dw2-errno2.c b/gdb/testsuite/gdb.dwarf2/dw2-errno2.c +new file mode 100644 +--- /dev/null ++++ b/gdb/testsuite/gdb.dwarf2/dw2-errno2.c +@@ -0,0 +1,28 @@ ++/* This testcase is part of GDB, the GNU debugger. ++ ++ Copyright 2005, 2007 Free Software Foundation, Inc. ++ ++ This program is free software; you can redistribute it and/or modify ++ it under the terms of the GNU General Public License as published by ++ the Free Software Foundation; either version 3 of the License, or ++ (at your option) any later version. ++ ++ This program is distributed in the hope that it will be useful, ++ but WITHOUT ANY WARRANTY; without even the implied warranty of ++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ GNU General Public License for more details. ++ ++ You should have received a copy of the GNU General Public License ++ along with this program. If not, see <http://www.gnu.org/licenses/>. ++ ++ Please email any bugs, comments, and/or additions to this file to: ++ bug-gdb@prep.ai.mit.edu */ ++ ++#include <errno.h> ++ ++int main() ++{ ++ errno = 42; ++ ++ return 0; /* breakpoint */ ++} +diff --git a/gdb/testsuite/gdb.dwarf2/dw2-errno2.exp b/gdb/testsuite/gdb.dwarf2/dw2-errno2.exp +new file mode 100644 +--- /dev/null ++++ b/gdb/testsuite/gdb.dwarf2/dw2-errno2.exp +@@ -0,0 +1,71 @@ ++# Copyright 2007 Free Software Foundation, Inc. ++ ++# This program is free software; you can redistribute it and/or modify ++# it under the terms of the GNU General Public License as published by ++# the Free Software Foundation; either version 3 of the License, or ++# (at your option) any later version. ++# ++# This program is distributed in the hope that it will be useful, ++# but WITHOUT ANY WARRANTY; without even the implied warranty of ++# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++# GNU General Public License for more details. ++# ++# You should have received a copy of the GNU General Public License ++# along with this program. If not, see <http://www.gnu.org/licenses/>. ++ ++set testfile dw2-errno2 ++set srcfile ${testfile}.c ++set binfile [standard_output_file ${testfile}] ++ ++proc prep { message {do_xfail 0} } { with_test_prefix $message { ++ global srcdir subdir binfile variant ++ gdb_exit ++ gdb_start ++ gdb_reinitialize_dir $srcdir/$subdir ++ gdb_load ${binfile}${variant} ++ ++ runto_main ++ ++ gdb_breakpoint [gdb_get_line_number "breakpoint"] ++ gdb_continue_to_breakpoint "breakpoint" ++ ++ gdb_test "gcore ${binfile}${variant}.core" "\r\nSaved corefile .*" "gcore $variant" ++ ++ gdb_test "print errno" ".* = 42" ++ ++ gdb_test "kill" ".*" "kill" {Kill the program being debugged\? \(y or n\) } "y" ++ gdb_test "core-file ${binfile}${variant}.core" "\r\nCore was generated by .*" "core-file" ++ if $do_xfail { ++ setup_xfail "*-*-*" ++ } ++ gdb_test "print (int) errno" ".* = 42" "print errno for core" ++}} ++ ++set variant g2thrN ++if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}${variant}" executable "additional_flags=-g2"] != "" } { ++ untested "Couldn't compile test program" ++ return -1 ++} ++prep "macros=N threads=N" 1 ++ ++set variant g3thrN ++if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}${variant}" executable "additional_flags=-g3"] != "" } { ++ untested "Couldn't compile test program" ++ return -1 ++} ++prep "macros=Y threads=N" 1 ++ ++set variant g2thrY ++if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}${variant}" executable "additional_flags=-g2"] != "" } { ++ return -1 ++} ++prep "macros=N threads=Y" ++ ++set variant g3thrY ++if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}${variant}" executable "additional_flags=-g3"] != "" } { ++ return -1 ++} ++prep "macros=Y threads=Y" 1 ++ ++# TODO: Test the error on resolving ERRNO with only libc loaded. ++# Just how to find the current libc filename? |