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| author | Markus Metzger <markus.t.metzger@intel.com> | 2014-03-19 13:49:58 +0100 |
|---|---|---|
| committer | Markus Metzger <markus.t.metzger@intel.com> | 2015-08-07 10:22:39 +0200 |
| commit | da8c46d2967b6325dcd2cc72eca26d807964c93c (patch) | |
| tree | cb49a304435ae9f3ce94f7214b3c8aa2e95ee38d /gdb/doc | |
| parent | 5599c404621b2d8ac021c1427aee6e8974572042 (diff) | |
| download | gdb-da8c46d2967b6325dcd2cc72eca26d807964c93c.zip gdb-da8c46d2967b6325dcd2cc72eca26d807964c93c.tar.gz gdb-da8c46d2967b6325dcd2cc72eca26d807964c93c.tar.bz2 | |
btrace: indicate speculative execution
Indicate speculatively executed instructions with a leading '?'. We use the
space that is normally used for the PC prefix. In the case where the
instruction at the current PC had been executed speculatively before, the PC
prefix will be partially overwritten resulting in "?> ".
As a side-effect, the /p modifier to omit the PC prefix in the "record
instruction-history" command now uses a 3-space PC prefix " " in order to
have enough space for the speculative execution indication.
gdb/
* btrace.c (btrace_compute_ftrace_bts): Clear insn flags.
(pt_btrace_insn_flags): New.
(ftrace_add_pt): Call pt_btrace_insn_flags.
* btrace.h (btrace_insn_flag): New.
(btrace_insn) <flags>: New.
* record-btrace.c (btrace_insn_history): Print insn prefix.
* NEWS: Announce it.
doc/
* gdb.texinfo (Process Record and Replay): Document prefixing of
speculatively executed instructions in the "record instruction-history"
command.
testsuite/
* gdb.btrace/instruction_history.exp: Update.
* gdb.btrace/tsx.exp: New.
* gdb.btrace/tsx.c: New.
* lib/gdb.exp (skip_tsx_tests, skip_btrace_pt_tests): New.
Diffstat (limited to 'gdb/doc')
| -rw-r--r-- | gdb/doc/ChangeLog | 6 | ||||
| -rw-r--r-- | gdb/doc/gdb.texinfo | 9 |
2 files changed, 13 insertions, 2 deletions
diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog index eec2dc6..473debf 100644 --- a/gdb/doc/ChangeLog +++ b/gdb/doc/ChangeLog @@ -1,3 +1,9 @@ +2015-08-07 Markus Metzger <markus.t.metzger@intel.com> + + * gdb.texinfo (Process Record and Replay): Document prefixing of + speculatively executed instructions in the "record instruction-history" + command. + 2015-07-20 Doug Evans <dje@google.com> * Makefile.in (STABS_DOC_BUILD_INCLUDES): Add gdb-cfg.texi, GDBvn.texi. diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo index 9e2ecd1..863bb66 100644 --- a/gdb/doc/gdb.texinfo +++ b/gdb/doc/gdb.texinfo @@ -6736,8 +6736,13 @@ recorded ``future'' and begin recording a new ``future''. Disassembles instructions from the recorded execution log. By default, ten instructions are disassembled. This can be changed using the @code{set record instruction-history-size} command. Instructions -are printed in execution order. There are several ways to specify -what part of the execution log to disassemble: +are printed in execution order. + +Speculatively executed instructions are prefixed with @samp{?}. This +feature is not available for all recording formats. + +There are several ways to specify what part of the execution log to +disassemble: @table @code @item record instruction-history @var{insn} |