61 lines
2.3 KiB
Diff
61 lines
2.3 KiB
Diff
From da9f2db255c1f0c63c10993eb62db567265ced6e Mon Sep 17 00:00:00 2001
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From: Christian Hergert <chergert@redhat.com>
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Date: Sun, 3 Nov 2024 10:54:57 -0800
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Subject: [PATCH 17/18] sysprof-cli: add support for live unwinding
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This allows you to specify --stack-size=(multiple_of_page_size) to unwind
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from captured stack contents. It will use the new SysprofUserSampler to
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unwind stack traces via sysprof-live-unwinder.
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---
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src/sysprof-cli/sysprof-cli.c | 13 ++++++++++++-
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1 file changed, 12 insertions(+), 1 deletion(-)
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diff --git a/src/sysprof-cli/sysprof-cli.c b/src/sysprof-cli/sysprof-cli.c
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index e00bd6b1..1c9ce928 100644
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--- a/src/sysprof-cli/sysprof-cli.c
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+++ b/src/sysprof-cli/sysprof-cli.c
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@@ -303,6 +303,7 @@ main (int argc,
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gboolean scheduler_details = FALSE;
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gboolean system_bus = FALSE;
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gboolean session_bus = FALSE;
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+ int stack_size = 0;
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int pid = -1;
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int fd;
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int flags;
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@@ -335,6 +336,7 @@ main (int argc,
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{ "version", 0, 0, G_OPTION_ARG_NONE, &version, N_("Print the sysprof-cli version and exit") },
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{ "buffer-size", 0, 0, G_OPTION_ARG_INT, &n_buffer_pages, N_("The size of the buffer in pages (1 = 1 page)") },
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{ "monitor-bus", 0, 0, G_OPTION_ARG_STRING_ARRAY, &monitor_bus, N_("Additional D-Bus address to monitor") },
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+ { "stack-size", 0, 0, G_OPTION_ARG_INT, &stack_size, N_("Stack size to copy for unwinding in user-space") },
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{ NULL }
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};
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@@ -379,6 +381,10 @@ Examples:\n\
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\n\
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# Merge multiple syscap files into one\n\
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sysprof-cli --merge a.syscap b.syscap > c.syscap\n\
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+\n\
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+ # Unwind by capturing stack/register contents instead of frame-pointers\n\
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+ # where the stack-size is a multiple of page-size\n\
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+ sysprof-cli --stack-size=8192\n\
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"));
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if (!g_option_context_parse (context, &argc, &argv, &error))
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@@ -533,7 +539,12 @@ Examples:\n\
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sysprof_profiler_add_instrument (profiler, sysprof_system_logs_new ());
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if (!no_perf)
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- sysprof_profiler_add_instrument (profiler, sysprof_sampler_new ());
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+ {
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+ if (stack_size == 0)
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+ sysprof_profiler_add_instrument (profiler, sysprof_sampler_new ());
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+ else
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+ sysprof_profiler_add_instrument (profiler, sysprof_user_sampler_new (stack_size));
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+ }
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if (!no_disk)
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sysprof_profiler_add_instrument (profiler, sysprof_disk_usage_new ());
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--
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2.45.2
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