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| author | Jeff Hostetler <jeffhost@microsoft.com> | 2019-02-22 14:25:01 -0800 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2019-02-22 15:27:59 -0800 |
| commit | ee4512ed481a126dadd33334186e0e759d7f2f47 (patch) | |
| tree | 4bc0418115d44b1833c1d24d2ac1c92f067b7ad3 /trace2/tr2_sid.h | |
| parent | e544221d97a57a9be7ba18a0df52a15b4cc76f97 (diff) | |
| download | git-ee4512ed481a126dadd33334186e0e759d7f2f47.tar.gz | |
trace2: create new combined trace facility
Create a new unified tracing facility for git. The eventual intent is to
replace the current trace_printf* and trace_performance* routines with a
unified set of git_trace2* routines.
In addition to the usual printf-style API, trace2 provides higer-level
event verbs with fixed-fields allowing structured data to be written.
This makes post-processing and analysis easier for external tools.
Trace2 defines 3 output targets. These are set using the environment
variables "GIT_TR2", "GIT_TR2_PERF", and "GIT_TR2_EVENT". These may be
set to "1" or to an absolute pathname (just like the current GIT_TRACE).
* GIT_TR2 is intended to be a replacement for GIT_TRACE and logs command
summary data.
* GIT_TR2_PERF is intended as a replacement for GIT_TRACE_PERFORMANCE.
It extends the output with columns for the command process, thread,
repo, absolute and relative elapsed times. It reports events for
child process start/stop, thread start/stop, and per-thread function
nesting.
* GIT_TR2_EVENT is a new structured format. It writes event data as a
series of JSON records.
Calls to trace2 functions log to any of the 3 output targets enabled
without the need to call different trace_printf* or trace_performance*
routines.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'trace2/tr2_sid.h')
| -rw-r--r-- | trace2/tr2_sid.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/trace2/tr2_sid.h b/trace2/tr2_sid.h new file mode 100644 index 0000000000..9bef321708 --- /dev/null +++ b/trace2/tr2_sid.h @@ -0,0 +1,18 @@ +#ifndef TR2_SID_H +#define TR2_SID_H + +/* + * Get our session id. Compute if necessary. + */ +const char *tr2_sid_get(void); + +/* + * Get our process depth. A top-level git process invoked from the + * command line will have depth=0. A child git process will have + * depth=1 and so on. + */ +int tr2_sid_depth(void); + +void tr2_sid_release(void); + +#endif /* TR2_SID_H */ |