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gdb.18935
gdb-glibc-strstr-workaround.patch
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File gdb-glibc-strstr-workaround.patch of Package gdb.18935
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-glibc-strstr-workaround.patch ;; Workaround PR libc/14166 for inferior calls of strstr. ;;=fedoratest: Compatibility with RHELs (unchecked which ones). diff --git a/gdb/testsuite/gdb.base/gnu-ifunc-strstr-workaround.exp b/gdb/testsuite/gdb.base/gnu-ifunc-strstr-workaround.exp new file mode 100644 --- /dev/null +++ b/gdb/testsuite/gdb.base/gnu-ifunc-strstr-workaround.exp @@ -0,0 +1,115 @@ +# Copyright (C) 2012 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/>. + +# Workaround for: +# invalid IFUNC DW_AT_linkage_name: memmove strstr time +# http://sourceware.org/bugzilla/show_bug.cgi?id=14166 + +if {[skip_shlib_tests]} { + return 0 +} + +set testfile "gnu-ifunc-strstr-workaround" +set executable ${testfile} +set srcfile start.c +set binfile [standard_output_file ${executable}] + +if [prepare_for_testing ${testfile}.exp $executable $srcfile] { + return -1 +} + +if ![runto_main] { + return 0 +} + +set test "ptype atoi" +gdb_test_multiple $test $test { + -re "type = int \\(const char \\*\\)\r\n$gdb_prompt $" { + pass $test + } + -re "type = int \\(\\)\r\n$gdb_prompt $" { + untested "$test (no DWARF)" + return 0 + } +} + +set addr "" +set test "print strstr" +gdb_test_multiple $test $test { + -re " = {<text gnu-indirect-function variable, no debug info>} (0x\[0-9a-f\]+) <strstr>\r\n$gdb_prompt $" { + set addr $expect_out(1,string) + pass $test + } + -re " = {<text gnu-indirect-function variable, no debug info>} (0x\[0-9a-f\]+) <__strstr>\r\n$gdb_prompt $" { + set addr $expect_out(1,string) + pass "$test (GDB workaround)" + } + -re " = {<text gnu-indirect-function variable, no debug info>} (0x\[0-9a-f\]+) <__libc_strstr>\r\n$gdb_prompt $" { + set addr $expect_out(1,string) + pass "$test (fixed glibc)" + } + -re " = {<text gnu-indirect-function variable, no debug info>} (0x\[0-9a-f\]+) <__libc_strstr_ifunc>\r\n$gdb_prompt $" { + set addr $expect_out(1,string) + pass "$test (fixed glibc)" + } + -re " = {char \\*\\(const char \\*, const char \\*\\)} 0x\[0-9a-f\]+ <strstr>\r\n$gdb_prompt $" { + untested "$test (gnu-ifunc not in use by glibc)" + return 0 + } +} + +set test "info sym" +gdb_test_multiple "info sym $addr" $test { + -re "strstr in section \\.text of /lib\[^/\]*/libc.so.6\r\n$gdb_prompt $" { + pass $test + } + -re " = {char \\*\\(const char \\*, const char \\*\\)} 0x\[0-9a-f\]+ <strstr>\r\n$gdb_prompt $" { + # unexpected + xfail "$test (not in libc.so.6)" + return 0 + } +} + +set test "info addr strstr" +gdb_test_multiple $test $test { + -re "Symbol \"strstr\" is a function at address $addr\\.\r\n$gdb_prompt $" { + fail "$test (DWARF for strstr)" + } + -re "Symbol \"strstr\" is at $addr in a file compiled without debugging\\.\r\n$gdb_prompt $" { + pass "$test" + } +} + +set test "print strstr second time" +gdb_test_multiple "print strstr" $test { + -re " = {<text gnu-indirect-function variable, no debug info>} $addr <strstr>\r\n$gdb_prompt $" { + pass $test + } + -re " = {<text gnu-indirect-function variable, no debug info>} $addr <__strstr>\r\n$gdb_prompt $" { + pass "$test (GDB workaround)" + } + -re " = {<text gnu-indirect-function variable, no debug info>} $addr <__libc_strstr>\r\n$gdb_prompt $" { + pass "$test (fixed glibc)" + } + -re " = {<text gnu-indirect-function variable, no debug info>} $addr <__libc_strstr_ifunc>\r\n$gdb_prompt $" { + pass "$test (fixed glibc)" + } + -re " = {void \\*\\(void\\)} 0x\[0-9a-f\]+ <strstr>\r\n$gdb_prompt $" { + fail $test + } +} + +gdb_test {print strstr("abc","b")} { = 0x[0-9a-f]+ "bc"} +gdb_test {print strstr("def","e")} { = 0x[0-9a-f]+ "ef"}
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