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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.gdb-7.8-branch
Markus Metzger
13 years ago
12 changed files with 260 additions and 118 deletions
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# 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-record_goto.S |
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if [prepare_for_testing delta.exp $testfile $srcfile] { |
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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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# proceed to some sequential code |
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gdb_test "next" |
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# start tracing |
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gdb_test_no_output "record btrace" |
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# we start without trace |
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with_test_prefix "no trace" { |
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gdb_test "info record" [join [list \ |
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"Active record target: record-btrace" \ |
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"Recorded 0 instructions in 0 functions for .*" \ |
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] "\r\n"] |
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gdb_test "record instruction-history" "No trace\." |
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gdb_test "record function-call-history" "No trace\." |
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} |
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# we record each single-step, even if we have not seen a branch, yet. |
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gdb_test "stepi" |
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proc check_trace {} { |
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gdb_test "info record" [join [list \ |
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"Active record target: record-btrace" \ |
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"Recorded 1 instructions in 1 functions for .*" \ |
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] "\r\n"] |
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gdb_test "record instruction-history /f 1" \ |
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"1\t 0x\[0-9a-f\]+ <\\+\[0-9\]+>:\tmov *\\\$0x0,%eax\r" |
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gdb_test "record function-call-history /c 1" "1\tmain" |
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} |
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# make sure we don't extend the trace when we ask twice. |
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with_test_prefix "once" { |
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check_trace |
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} |
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with_test_prefix "twice" { |
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check_trace |
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} |
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