mirror of
https://github.com/git/git.git
synced 2024-05-11 10:06:35 +02:00
ee4512ed48
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>
91 lines
2.0 KiB
C
91 lines
2.0 KiB
C
#include "cache.h"
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#include "config.h"
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#include "tr2_cfg.h"
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#define TR2_ENVVAR_CFG_PARAM "GIT_TR2_CONFIG_PARAMS"
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static struct strbuf **tr2_cfg_patterns;
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static int tr2_cfg_count_patterns;
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static int tr2_cfg_loaded;
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/*
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* Parse a string containing a comma-delimited list of config keys
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* or wildcard patterns into a list of strbufs.
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*/
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static int tr2_cfg_load_patterns(void)
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{
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struct strbuf **s;
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const char *envvar;
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if (tr2_cfg_loaded)
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return tr2_cfg_count_patterns;
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tr2_cfg_loaded = 1;
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envvar = getenv(TR2_ENVVAR_CFG_PARAM);
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if (!envvar || !*envvar)
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return tr2_cfg_count_patterns;
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tr2_cfg_patterns = strbuf_split_buf(envvar, strlen(envvar), ',', -1);
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for (s = tr2_cfg_patterns; *s; s++) {
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struct strbuf *buf = *s;
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if (buf->len && buf->buf[buf->len - 1] == ',')
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strbuf_setlen(buf, buf->len - 1);
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strbuf_trim_trailing_newline(*s);
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strbuf_trim(*s);
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}
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tr2_cfg_count_patterns = s - tr2_cfg_patterns;
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return tr2_cfg_count_patterns;
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}
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void tr2_cfg_free_patterns(void)
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{
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if (tr2_cfg_patterns)
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strbuf_list_free(tr2_cfg_patterns);
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tr2_cfg_count_patterns = 0;
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tr2_cfg_loaded = 0;
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}
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struct tr2_cfg_data {
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const char *file;
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int line;
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};
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/*
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* See if the given config key matches any of our patterns of interest.
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*/
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static int tr2_cfg_cb(const char *key, const char *value, void *d)
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{
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struct strbuf **s;
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struct tr2_cfg_data *data = (struct tr2_cfg_data *)d;
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for (s = tr2_cfg_patterns; *s; s++) {
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struct strbuf *buf = *s;
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int wm = wildmatch(buf->buf, key, WM_CASEFOLD);
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if (wm == WM_MATCH) {
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trace2_def_param_fl(data->file, data->line, key, value);
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return 0;
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}
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}
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return 0;
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}
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void tr2_cfg_list_config_fl(const char *file, int line)
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{
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struct tr2_cfg_data data = { file, line };
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if (tr2_cfg_load_patterns() > 0)
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read_early_config(tr2_cfg_cb, &data);
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}
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void tr2_cfg_set_fl(const char *file, int line, const char *key,
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const char *value)
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{
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struct tr2_cfg_data data = { file, line };
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if (tr2_cfg_load_patterns() > 0)
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tr2_cfg_cb(key, value, &data);
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}
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