2013-03-11 08:59:00 +00:00
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# This testcase is part of GDB, the GNU debugger.
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#
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2015-01-01 09:32:14 +00:00
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# Copyright 2013-2015 Free Software Foundation, Inc.
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2013-03-11 08:59:00 +00:00
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#
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# Contributed by Intel Corp. <christian.himpel@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 fresh - without an executable
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gdb_exit
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gdb_start
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# record cannot be stopped, if it was never active
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gdb_test "record stop" "No record target is currently active\\..*" "record stop without target"
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# btrace cannot be enabled without a running inferior
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gdb_test "record btrace" "The program is not being run\\." "record btrace without running program"
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# no function and no instruction history without btrace enabled
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gdb_test "record function-call-history" "No record target is currently active\\..*" "record function-call-history without target"
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gdb_test "record instruction-history" "No record target is currently active\\..*" "record instruction-history without target"
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gdb_test "info record" "No record target is currently active\\." "info record without target"
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# start inferior
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standard_testfile
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if [prepare_for_testing $testfile.exp $testfile {} {debug}] {
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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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# enable btrace
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gdb_test_no_output "record btrace" "record btrace"
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gdb_test "record function-call-history" "No trace\\." "record function-call-history without trace"
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gdb_test "record instruction-history" "No trace\\." "record instruction-history without trace"
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# btrace cannot be enabled twice
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2014-01-16 08:47:51 +00:00
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gdb_test "record btrace" "The process is already being recorded\\. Use \"record stop\" to stop recording first\\." "record btrace the second time"
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2013-03-11 08:59:00 +00:00
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# full record cannot be activated as long as btrace is active
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2014-01-16 08:47:51 +00:00
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gdb_test "record full" "The process is already being recorded\\. Use \"record stop\" to stop recording first\\." "record full cannot be enabled"
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2013-03-11 08:59:00 +00:00
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# no trace recorded yet
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2013-11-28 14:44:13 +00:00
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gdb_test "info record" "Active record target: record-btrace\r
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.*\r
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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 08:51:10 +00:00
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Recorded 0 instructions in 0 functions \\\(0 gaps\\\) for thread 1.*\\." "info record without trace"
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2013-03-11 08:59:00 +00:00
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# stop btrace record
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gdb_test "record stop" "Process record is stopped and all execution logs are deleted\\." "record stop"
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gdb_test "record stop" "No record target is currently active\\..*" "record stop the second time"
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# enable btrace again
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gdb_test_no_output "record btrace" "record btrace re-enable"
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2014-01-16 08:47:51 +00:00
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gdb_test "record btrace" "The process is already being recorded\\. Use \"record stop\" to stop recording first\\." "record btrace re-enable twice"
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2013-03-11 08:59:00 +00:00
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# continue to the end and make sure we don't die
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gdb_test "continue" ".*Inferior.*exited.*" "continue to end"
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# skip the rerun test when using gdbserver
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# otherwise rerun twice, target should be automatically disabled
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load_lib gdbserver-support.exp
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if [skip_gdbserver_tests] {
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return 0
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}
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clean_restart $testfile
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if ![runto_main] {
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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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2013-03-26 07:15:09 +00:00
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# make sure record-btrace can be enabled after re-run
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clean_restart $testfile
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if ![runto_main] {
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return -1
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}
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gdb_test_no_output "record btrace"
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if ![runto_main] {
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return -1
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}
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gdb_test_no_output "record btrace" "enable after re-run"
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