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sysprof-cli: add support for live unwinding

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This allows you to specify --stack-size=(multiple_of_page_size) to unwind
from captured stack contents. It will use the new SysprofUserSampler to
unwind stack traces via sysprof-live-unwinder.
This commit is contained in:
Christian Hergert
2024-11-03 10:54:57 -08:00
parent 6e3e1637be
commit c3cb2f71bc
1 changed files with 12 additions and 1 deletions
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13
src/sysprof-cli/sysprof-cli.c
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@ -303,6 +303,7 @@ main (int argc,
gboolean scheduler_details = FALSE;
gboolean system_bus = FALSE;
gboolean session_bus = FALSE;
int stack_size = 0;
int pid = -1;
int fd;
int flags;
@ -335,6 +336,7 @@ main (int argc,
{ "version", 0, 0, G_OPTION_ARG_NONE, &version, N_("Print the sysprof-cli version and exit") },
{ "buffer-size", 0, 0, G_OPTION_ARG_INT, &n_buffer_pages, N_("The size of the buffer in pages (1 = 1 page)") },
{ "monitor-bus", 0, 0, G_OPTION_ARG_STRING_ARRAY, &monitor_bus, N_("Additional D-Bus address to monitor") },
{ "stack-size", 0, 0, G_OPTION_ARG_INT, &stack_size, N_("Stack size to copy for unwinding in user-space") },
{ NULL }
};
@ -379,6 +381,10 @@ Examples:\n\
\n\
# Merge multiple syscap files into one\n\
sysprof-cli --merge a.syscap b.syscap > c.syscap\n\
\n\
# Unwind by capturing stack/register contents instead of frame-pointers\n\
# where the stack-size is a multiple of page-size\n\
sysprof-cli --stack-size=8192\n\
"));
if (!g_option_context_parse (context, &argc, &argv, &error))
@ -533,7 +539,12 @@ Examples:\n\
sysprof_profiler_add_instrument (profiler, sysprof_system_logs_new ());
if (!no_perf)
sysprof_profiler_add_instrument (profiler, sysprof_sampler_new ());
{
if (stack_size == 0)
sysprof_profiler_add_instrument (profiler, sysprof_sampler_new ());
else
sysprof_profiler_add_instrument (profiler, sysprof_user_sampler_new (stack_size));
}
if (!no_disk)
sysprof_profiler_add_instrument (profiler, sysprof_disk_usage_new ());