2013-11-28 16:39:12 +01:00
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# This testcase is part of GDB, the GNU debugger.
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#
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2018-01-01 05:43:02 +01:00
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# Copyright 2013-2018 Free Software Foundation, Inc.
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2013-11-28 16:39:12 +01:00
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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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2016-12-09 13:16:22 +01:00
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if { [skip_btrace_tests] } {
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unsupported "target does not support record-btrace"
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return -1
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}
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2013-11-28 16:39:12 +01:00
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standard_testfile record_goto.c
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2016-12-23 17:52:18 +01:00
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if [prepare_for_testing "failed to prepare" $testfile $srcfile] {
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2013-11-28 16:39:12 +01:00
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return -1
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}
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if ![runto_main] {
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2016-12-09 13:16:22 +01:00
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untested "failed to run to main"
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2013-11-28 16:39:12 +01:00
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return -1
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}
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gdb_test_no_output "set record btrace bts buffer-size 1"
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gdb_test "show record btrace bts buffer-size" "The record/replay bts buffer size is 1\.\r" "bts buffer size before recording"
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gdb_test_no_output "record btrace bts"
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gdb_test "show record btrace bts buffer-size" "The record/replay bts buffer size is 1\.\r" "bts buffer size while recording"
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2015-03-10 09:51:27 +01:00
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gdb_test "info record" [multi_line \
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2013-11-28 16:39:12 +01:00
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"Active record target: record-btrace" \
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"Recording format: Branch Trace Store\." \
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"Buffer size: 4kB\." \
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record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 09:51:10 +01:00
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"Recorded 0 instructions in 0 functions \\\(0 gaps\\\) for \[^\\\r\\\n\]*" \
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2015-03-10 09:51:27 +01:00
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] "info record with small bts buffer"
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2013-11-28 16:39:12 +01:00
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gdb_test "record stop" ".*" "stop recording with small bts buffer"
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gdb_test_no_output "set record btrace bts buffer-size 0"
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2015-09-11 09:26:21 +02:00
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gdb_test "show record btrace bts buffer-size" "The record/replay bts buffer size is unlimited\.\r" "unlimited bts buffer size"
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