6e07b1d27e
The btrace record target shows the branch trace from the location of the first branch destination. This is the first BTS records. After adding incremental updates, we can now add a dummy record for the current PC when we enable tracing so we show the trace from the location where branch tracing has been enabled. 2014-01-16 Markus Metzger <markus.t.metzger@intel.com> * btrace.c: Include regcache.h. (btrace_add_pc): New. (btrace_enable): Call btrace_add_pc. (btrace_is_empty): New. * btrace.h (btrace_is_empty): New. * record-btrace.c (require_btrace, record_btrace_info): Call btrace_is_empty. testsuite/ * gdb.btrace/Makefile.in (EXECUTABLES): Add delta. * gdb.btrace/exception.exp: Update. * gdb.btrace/instruction_history.exp: Update. * gdb.btrace/record_goto.exp: Update. * gdb.btrace/tailcall.exp: Update. * gdb.btrace/unknown_functions.exp: Update. * gdb.btrace/delta.exp: New.
79 lines
2.3 KiB
Text
79 lines
2.3 KiB
Text
# This testcase is part of GDB, the GNU debugger.
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#
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# Copyright 2013 Free Software Foundation, Inc.
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#
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# Contributed by Intel Corp. <markus.t.metzger@intel.com>
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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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# check for btrace support
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if { [skip_btrace_tests] } { return -1 }
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# start inferior
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standard_testfile x86-tailcall.S
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set opts {}
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if [info exists COMPILE] {
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# make check RUNTESTFLAGS="gdb.btrace/tailcall.exp COMPILE=1"
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standard_testfile x86-tailcall.c
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lappend opts debug optimize=-O2
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} elseif { ![istarget x86_64-*-* ] || ![is_lp64_target] } {
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verbose "Skipping ${testfile}."
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return
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}
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if [prepare_for_testing tailcall.exp $testfile $srcfile $opts] {
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return -1
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}
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if ![runto_main] {
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return -1
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}
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# we want to see the full trace for this test
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gdb_test_no_output "set record function-call-history-size 0"
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# trace the call to foo
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gdb_test_no_output "record btrace"
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gdb_test "next"
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# show the flat branch trace
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gdb_test "record function-call-history 1" [join [list \
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"1\tmain" \
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"2\tfoo" \
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"3\tbar" \
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"4\tmain" \
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] "\r\n"] "flat"
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# show the branch trace with calls indented
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gdb_test "record function-call-history /c 1" [join [list \
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"1\tmain" \
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"2\t foo" \
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"3\t bar" \
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"4\tmain" \
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] "\r\n"] "indented"
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# go into bar
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gdb_test "record goto 4" ".*bar \\(\\) at .*x86-tailcall.c:24\r\n.*"
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# check the backtrace
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gdb_test "backtrace" [join [list \
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"#0.*bar \\(\\) at x86-tailcall.c:24" \
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"#1.*foo \\(\\) at x86-tailcall.c:29" \
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"#2.*main \\(\\) at x86-tailcall.c:37" \
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"Backtrace stopped: not enough registers or memory available to unwind further" \
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] "\r\n"]
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# walk the backtrace
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gdb_test "up" "#1\[^\r\n\]*foo \\(\\) at x86-tailcall.c:29\r\n.*" "up to foo"
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gdb_test "up" "#2\[^\r\n\]*main \\(\\) at x86-tailcall.c:37\r\n.*" "up to main"
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