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| author | Markus Metzger <markus.t.metzger@intel.com> | 2013-06-03 15:39:35 +0200 |
|---|---|---|
| committer | Markus Metzger <markus.t.metzger@intel.com> | 2014-01-16 13:11:42 +0100 |
| commit | 969c39fbcd6a5675c1f4b97cd23d680e4b5b6487 (patch) | |
| tree | 54d7a2c546ecf86fbe37536db86d0916734203d8 /gdb/common/linux-btrace.h | |
| parent | 0b722aec57e2e54083c1d56657762945ad4604fc (diff) | |
| download | binutils-969c39fbcd6a5675c1f4b97cd23d680e4b5b6487.zip binutils-969c39fbcd6a5675c1f4b97cd23d680e4b5b6487.tar.gz binutils-969c39fbcd6a5675c1f4b97cd23d680e4b5b6487.tar.bz2 | |
btrace, gdbserver: read branch trace incrementally
Read branch trace data incrementally and extend the current trace rather than
discarding it and reading the entire trace buffer each time.
If the branch trace buffer overflowed, we can't extend the current trace so we
discard it and start anew by reading the entire branch trace buffer.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* common/linux-btrace.c (perf_event_read_bts, linux_read_btrace):
Support delta reads.
(linux_disable_btrace): Change return type.
* common/linux-btrace.h (linux_read_btrace): Change parameters
and return type to allow error reporting. Update users.
(linux_disable_btrace): Change return type. Update users.
* common/btrace-common.h (btrace_read_type) <BTRACE_READ_DELTA>:
New.
(btrace_error): New.
(btrace_block) <begin>: Comment on BEGIN == 0.
* btrace.c (btrace_compute_ftrace): Start from the end of
the current trace.
(btrace_stitch_trace, btrace_clear_history): New.
(btrace_fetch): Read delta trace, return if replaying.
(btrace_clear): Move clear history code to btrace_clear_history.
(parse_xml_btrace): Throw an error if parsing failed.
* target.h (struct target_ops) <to_read_btrace>: Change parameters
and return type to allow error reporting.
(target_read_btrace): Change parameters and return type to allow
error reporting.
* target.c (target_read_btrace): Update.
* remote.c (remote_read_btrace): Support delta reads. Pass
errors on.
* NEWS: Announce it.
gdbserver/
* target.h (target_ops) <read_btrace>: Change parameters and
return type to allow error reporting.
* server.c (handle_qxfer_btrace): Support delta reads. Pass
trace reading errors on.
* linux-low.c (linux_low_read_btrace): Pass trace reading
errors on.
(linux_low_disable_btrace): New.
Diffstat (limited to 'gdb/common/linux-btrace.h')
| -rw-r--r-- | gdb/common/linux-btrace.h | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/gdb/common/linux-btrace.h b/gdb/common/linux-btrace.h index 32a0403..a97b697 100644 --- a/gdb/common/linux-btrace.h +++ b/gdb/common/linux-btrace.h @@ -61,17 +61,18 @@ struct btrace_target_info int ptr_bits; }; -/* Check whether branch tracing is supported. */ +/* See to_supports_btrace in target.h. */ extern int linux_supports_btrace (void); -/* Enable branch tracing for @ptid. */ +/* See to_enable_btrace in target.h. */ extern struct btrace_target_info *linux_enable_btrace (ptid_t ptid); -/* Disable branch tracing and deallocate @tinfo. */ -extern int linux_disable_btrace (struct btrace_target_info *tinfo); +/* See to_disable_btrace in target.h. */ +extern enum btrace_error linux_disable_btrace (struct btrace_target_info *ti); -/* Read branch trace data. */ -extern VEC (btrace_block_s) *linux_read_btrace (struct btrace_target_info *, - enum btrace_read_type); +/* See to_read_btrace in target.h. */ +extern enum btrace_error linux_read_btrace (VEC (btrace_block_s) **btrace, + struct btrace_target_info *btinfo, + enum btrace_read_type type); #endif /* LINUX_BTRACE_H */ |