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Diffstat (limited to 'gdb-test-bt-cfi-without-die.patch')
| -rw-r--r-- | gdb-test-bt-cfi-without-die.patch | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/gdb-test-bt-cfi-without-die.patch b/gdb-test-bt-cfi-without-die.patch new file mode 100644 index 0000000..6167c14 --- /dev/null +++ b/gdb-test-bt-cfi-without-die.patch @@ -0,0 +1,214 @@ +From FEDORA_PATCHES Mon Sep 17 00:00:00 2001 +From: Fedora GDB patches <invalid@email.com> +Date: Fri, 27 Oct 2017 21:07:50 +0200 +Subject: gdb-test-bt-cfi-without-die.patch + +;; [delayed-symfile] Test a backtrace regression on CFIs without DIE (BZ 614604). +;;=fedoratest + +http://sourceware.org/ml/archer/2010-q3/msg00028.html + +On Wed, 25 Feb 2009 00:14:29 +0100, Jan Kratochvil wrote: +> commit 6a37c2b9962258ecf9299cc34a650e64a06acaa5 +> +> There was a regression on gdb.base/savedregs.exp. +> +> quick_addrmap/require_partial_symbols should be used even for the unwind debug +> info checking as its load has been also delayed by this branch. +[...] +> --- a/gdb/dwarf2-frame.c +> +++ b/gdb/dwarf2-frame.c +[...] +> @@ -1499,6 +1500,14 @@ dwarf2_frame_find_fde (CORE_ADDR *pc) +> struct dwarf2_fde *fde; +> CORE_ADDR offset; +> +> + if (objfile->quick_addrmap) +> + { +> + if (!addrmap_find (objfile->quick_addrmap, *pc)) +> + continue; +> + } +> + /* FIXME: Read-in only .debug_frame/.eh_frame without .debug_info? */ +> + require_partial_symbols (objfile); +> + + +but this has caused a different regression (as discussed in the confcall). + +QUICK_ADDRMAP is built only from .debug_aranges. But we can have existing +built .debug_aranges for CUs in OBJFILE but still some CUs do not need to have +DWARF at all while they can feature CFIs (.eh_frame or .debug_frame). +It has been described by Daniel Jacobowitz at: + Re: [2/4] RFC: check psymtabs_addrmap before reading FDEs + http://sourceware.org/ml/gdb-patches/2010-07/msg00012.html + +Sorry for this regression by me (in that fix of a different regression). + +Fixed it the "slow way" as this branch is now obsoleted by .gdb-index. + +No regressions on {x86_64,x86_64-m32,i686}-fedora13-linux-gnu. + +Checked-in. + +Thanks, +Jan + +eb8df8566acc1ed963e3e9b77c13b9c2c3db03fb + +Test CFI is parsed even for range (function) not described by any DIE. + +https://bugzilla.redhat.com/show_bug.cgi?id=614028 + +gdb/ + * dwarf2-frame.c (dwarf2_frame_find_fde): Remove the + OBJFILE->QUICK_ADDRMAP check. New comment why. + +gdb/testsuite/ + * gdb.base/cfi-without-die.exp, gdb.base/cfi-without-die-main.c, + gdb.base/cfi-without-die-caller.c: New files. + +diff --git a/gdb/testsuite/gdb.base/cfi-without-die-caller.c b/gdb/testsuite/gdb.base/cfi-without-die-caller.c +new file mode 100644 +--- /dev/null ++++ b/gdb/testsuite/gdb.base/cfi-without-die-caller.c +@@ -0,0 +1,28 @@ ++/* This testcase is part of GDB, the GNU debugger. ++ ++ Copyright 2005, 2007, 2008, 2009, 2010 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/>. */ ++ ++typedef int (*callback_t) (void); ++ ++int ++caller (callback_t callback) ++{ ++ /* Ensure some frame content to push away the return address. */ ++ volatile const long one = 1; ++ ++ /* Modify the return value to prevent any tail-call optimization. */ ++ return (*callback) () - one; ++} +diff --git a/gdb/testsuite/gdb.base/cfi-without-die-main.c b/gdb/testsuite/gdb.base/cfi-without-die-main.c +new file mode 100644 +--- /dev/null ++++ b/gdb/testsuite/gdb.base/cfi-without-die-main.c +@@ -0,0 +1,32 @@ ++/* This testcase is part of GDB, the GNU debugger. ++ ++ Copyright 2005, 2007, 2008, 2009, 2010 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/>. */ ++ ++typedef int (*callback_t) (void); ++ ++extern int caller (callback_t callback); ++ ++int ++callback (void) ++{ ++ return 1; ++} ++ ++int ++main (void) ++{ ++ return caller (callback); ++} +diff --git a/gdb/testsuite/gdb.base/cfi-without-die.exp b/gdb/testsuite/gdb.base/cfi-without-die.exp +new file mode 100644 +--- /dev/null ++++ b/gdb/testsuite/gdb.base/cfi-without-die.exp +@@ -0,0 +1,71 @@ ++# Copyright 2010 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/>. ++ ++# Test CFI is parsed even for range (function) not described by any DIE. ++ ++set testfile cfi-without-die ++set srcmainfile ${testfile}-main.c ++set srccallerfile ${testfile}-caller.c ++set executable ${testfile} ++set objmainfile [standard_output_file ${testfile}-main.o] ++set objcallerfile [standard_output_file ${testfile}-caller.o] ++set binfile [standard_output_file ${executable}] ++ ++if { [gdb_compile "${srcdir}/${subdir}/${srccallerfile}" ${objcallerfile} \ ++ object [list {additional_flags=-fomit-frame-pointer -fno-unwind-tables -fno-asynchronous-unwind-tables}]] != "" ++ || [gdb_compile "${srcdir}/${subdir}/${srcmainfile}" ${objmainfile} object {debug}] != "" ++ || [gdb_compile "${objmainfile} ${objcallerfile}" ${binfile} executable {}] != "" } { ++ untested ${testfile}.exp ++ return -1 ++} ++ ++clean_restart $executable ++ ++if ![runto callback] then { ++ fail "verify unwinding: Can't run to callback" ++ return 0 ++} ++set test "verify unwinding breaks without CFI" ++gdb_test_multiple "bt" $test { ++ -re " in \[?\]\[?\] .*\r\n$gdb_prompt $" { ++ # It may backtrace through some random frames even to main(). ++ pass $test ++ } ++ -re " in main .*\r\n$gdb_prompt $" { ++ fail $test ++ } ++ -re "\r\n$gdb_prompt $" { ++ pass $test ++ } ++} ++ ++if { [gdb_compile "${srcdir}/${subdir}/${srccallerfile}" ${objcallerfile} \ ++ object [list {additional_flags=-fomit-frame-pointer -funwind-tables -fasynchronous-unwind-tables}]] != "" ++ || [gdb_compile "${srcdir}/${subdir}/${srcmainfile}" ${objmainfile} object {debug}] != "" ++ || [gdb_compile "${objmainfile} ${objcallerfile}" ${binfile} executable {}] != "" } { ++ untested ${testfile}.exp ++ return -1 ++} ++ ++clean_restart $executable ++ ++if ![runto callback] then { ++ fail "test CFI without DIEs: Can't run to callback" ++ return 0 ++} ++# #0 callback () at ... ++# #1 0x00000000004004e9 in caller () ++# #2 0x00000000004004cd in main () at ... ++gdb_test "bt" "#0 +callback \[^\r\n\]+\r\n#1 \[^\r\n\]+ in caller \[^\r\n\]+\r\n#2 \[^\r\n\]+ in main \[^\r\n\]+" "verify unwindin works for CFI without DIEs" |