From ee4512ed481a126dadd33334186e0e759d7f2f47 Mon Sep 17 00:00:00 2001 From: Jeff Hostetler Date: Fri, 22 Feb 2019 14:25:01 -0800 Subject: 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 Signed-off-by: Junio C Hamano --- trace2/tr2_cmd_name.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 trace2/tr2_cmd_name.h (limited to 'trace2/tr2_cmd_name.h') diff --git a/trace2/tr2_cmd_name.h b/trace2/tr2_cmd_name.h new file mode 100644 index 0000000000..ab70b67a8e --- /dev/null +++ b/trace2/tr2_cmd_name.h @@ -0,0 +1,24 @@ +#ifndef TR2_CMD_NAME_H +#define TR2_CMD_NAME_H + +/* + * Append the current command name to the list being maintained + * in the environment. + * + * The hierarchy for a top-level git command is just the current + * command name. For a child git process, the hierarchy includes the + * names of the parent processes. + * + * The hierarchy for the current process will be exported to the + * environment and inherited by child processes. + */ +void tr2_cmd_name_append_hierarchy(const char *name); + +/* + * Get the command name hierarchy for the current process. + */ +const char *tr2_cmd_name_get_hierarchy(void); + +void tr2_cmd_name_release(void); + +#endif /* TR2_CMD_NAME_H */ -- cgit v1.2.3