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main: setup GJS profiler when GJS_TRACE_FD is set

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This is the same environment variable that will be used in GJS to auto-
connect Sysprof to the GJS profiler when the gjs binary is used.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/573
This commit is contained in:
Christian Hergert
2019-06-05 16:12:47 -07:00
committed by Florian Müllner
parent 6f6b6fb9d6
commit 751cd2f1c1
2 changed files with 59 additions and 1 deletions
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58
src/main.c
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@ -198,6 +198,62 @@ shell_fonts_init (void)
cogl_pango_font_map_set_use_mipmapping (fontmap, FALSE);
}
static void
shell_profiler_init (void)
{
ShellGlobal *global;
GjsProfiler *profiler;
GjsContext *context;
const char *enabled;
const char *fd_str;
int fd = -1;
/* Sysprof uses the "GJS_TRACE_FD=N" environment variable to connect GJS
* profiler data to the combined Sysprof capture. Since we are in control of
* the GjsContext, we need to proxy this FD across to the GJS profiler.
*/
fd_str = g_getenv ("GJS_TRACE_FD");
enabled = g_getenv ("GJS_ENABLE_PROFILER");
if (fd_str == NULL || enabled == NULL)
return;
global = shell_global_get ();
g_return_if_fail (global);
context = _shell_global_get_gjs_context (global);
g_return_if_fail (context);
profiler = gjs_context_get_profiler (context);
g_return_if_fail (profiler);
if (fd_str)
{
fd = atoi (fd_str);
if (fd > 2)
{
gjs_profiler_set_fd (profiler, fd);
gjs_profiler_start (profiler);
}
}
}
static void
shell_profiler_shutdown (void)
{
ShellGlobal *global;
GjsProfiler *profiler;
GjsContext *context;
global = shell_global_get ();
context = _shell_global_get_gjs_context (global);
profiler = gjs_context_get_profiler (context);
if (profiler)
gjs_profiler_stop (profiler);
}
static void
malloc_statistics_callback (ShellPerfLog *perf_log,
gpointer data)
@ -496,7 +552,9 @@ main (int argc, char **argv)
dump_gjs_stack_on_signal (SIGSEGV);
}
shell_profiler_init ();
ecode = meta_run ();
shell_profiler_shutdown ();
g_debug ("Doing final cleanup");
_shell_global_destroy_gjs_context (shell_global_get ());