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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-6.8/] [gdb/] [testsuite/] [gdb.base/] [gdb1250.exp] - Blame information for rev 840

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1 24 jeremybenn
# Copyright 2003, 2007, 2008 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 .
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# Tests for PR gdb/1250.
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# 2003-07-15  Michael Chastain 
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# This file is part of the gdb testsuite.
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if $tracelevel then {
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        strace $tracelevel
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        }
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#
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# test running programs
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#
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set prms_id 0
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set bug_id 0
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set testfile "gdb1250"
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set srcfile ${testfile}.c
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set binfile ${objdir}/${subdir}/${testfile}
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if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
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     untested gdb1250.exp
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     return -1
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}
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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}
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if ![runto abort {allow-pending}] then {
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    perror "couldn't run to breakpoint"
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    continue
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}
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# See http://sources.redhat.com/gdb/bugs/1250
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#
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# In a nutshell: the function 'beta' ends with a call to 'abort', which
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# is a noreturn function.  So the last instruction of 'beta' is a call
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# to 'abort'.  When gdb looks for information about the caller of
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# 'beta', it looks at the instruction after the call to 'abort' -- which
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# is the first instruction of 'alpha'!  So gdb uses the wrong frame
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# information.  It thinks that the test program is in 'alpha' and that
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# the prologue "push %ebp / mov %esp,%ebp" has not been executed yet,
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# and grabs the wrong values.
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#
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# By the nature of the bug, it could pass if the C compiler is not smart
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# enough to implement 'abort' as a noreturn function.  This is okay.
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# The real point is that users often put breakpoints on noreturn
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# functions such as 'abort' or some kind of exitting function, and those
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# breakpoints should work.
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gdb_test_multiple "backtrace" "backtrace from abort" {
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    -re "#0.*abort.*\r\n#1.*beta.*\r\n#2.*alpha.*\r\n#3.*main.*\r\n$gdb_prompt $" {
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        pass "backtrace from abort"
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    }
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    -re "#0.*abort.*\r\n#1.*beta.*\r\n$gdb_prompt $" {
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        # This happens with gdb HEAD as of 2003-07-13, with gcc 3.3,
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        # binutils 2.14, either -gdwarf-2 or -gstabs+, on native
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        # i686-pc-linux-gnu.
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        #
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        # gdb gets 'abort' and 'beta' right and then goes into the
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        # weeds.
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        kfail "gdb/1250" "backtrace from abort"
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    }
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}

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