170 lines
5.7 KiB
Diff
170 lines
5.7 KiB
Diff
From: =?utf-8?b?Ik1hcmNvIFRyZXZpc2FuIChUcmV2acOxbyki?= <mail@3v1n0.net>
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Date: Tue, 24 Oct 2017 03:20:34 +0200
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Subject: main: increase the granularity of backtraces in SHELL_DEBUG
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Add support for multiple debug-keys for getting the backtraces,
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allowing more control using both SHELL_DEBUG and/or set_debug_flags
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https://bugzilla.gnome.org/show_bug.cgi?id=789377
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Bug-GNOME: https://bugzilla.gnome.org/show_bug.cgi?id=789377
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Forwarded: https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/6
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---
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src/main.c | 76 +++++++++++++++++++++++++++++++++++++++++-------------
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src/shell-global.c | 10 ++++---
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2 files changed, 65 insertions(+), 21 deletions(-)
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diff --git a/src/main.c b/src/main.c
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index 726afe9..047ea87 100644
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--- a/src/main.c
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+++ b/src/main.c
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@@ -34,16 +34,26 @@ extern GType gnome_shell_plugin_get_type (void);
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static gboolean is_gdm_mode = FALSE;
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static char *session_mode = NULL;
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static int caught_signal = 0;
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+static gboolean _tracked_signals[NSIG] = { 0 };
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#define DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER 1
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#define DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER 4
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enum {
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- SHELL_DEBUG_BACKTRACE_WARNINGS = 1,
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- SHELL_DEBUG_BACKTRACE_SEGFAULTS = 2,
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+ SHELL_DEBUG_BACKTRACE_WARNINGS = (1 << 0),
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+ SHELL_DEBUG_BACKTRACE_SEGFAULTS = (1 << 1),
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+ SHELL_DEBUG_BACKTRACE_ABORTS = (1 << 2),
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+ SHELL_DEBUG_BACKTRACE_FPE = (1 << 3),
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};
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-static int _shell_debug;
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-static gboolean _tracked_signals[NSIG] = { 0 };
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+static const GDebugKey SHELL_DEBUG_KEYS[] = {
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+ { "backtrace-warnings", SHELL_DEBUG_BACKTRACE_WARNINGS },
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+ { "backtrace-segfaults", SHELL_DEBUG_BACKTRACE_SEGFAULTS },
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+ { "backtrace-aborts", SHELL_DEBUG_BACKTRACE_ABORTS },
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+ { "backtrace-math-errors", SHELL_DEBUG_BACKTRACE_FPE },
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+};
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+static int _default_debug_flags = SHELL_DEBUG_BACKTRACE_ABORTS |
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+ SHELL_DEBUG_BACKTRACE_FPE;
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+static int _shell_debug = 0;
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static void
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shell_dbus_acquire_name (GDBusProxy *bus,
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@@ -278,13 +288,23 @@ shell_a11y_init (void)
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static void
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shell_update_debug (const char *debug_string)
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{
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- static const GDebugKey keys[] = {
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- { "backtrace-warnings", SHELL_DEBUG_BACKTRACE_WARNINGS },
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- { "backtrace-segfaults", SHELL_DEBUG_BACKTRACE_SEGFAULTS },
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- };
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+ _shell_debug = g_parse_debug_string (debug_string, SHELL_DEBUG_KEYS,
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+ G_N_ELEMENTS (SHELL_DEBUG_KEYS));
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+}
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+
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+static char *
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+debug_flags_to_string (void)
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+{
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+ gsize i, j;
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+ const char *enabled_flags[G_N_ELEMENTS (SHELL_DEBUG_KEYS) + 1] = { 0 };
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+
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+ for (i = 0, j = 0; i < G_N_ELEMENTS (SHELL_DEBUG_KEYS); ++i)
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+ {
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+ if ((_shell_debug & SHELL_DEBUG_KEYS[i].value))
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+ enabled_flags[j++] = SHELL_DEBUG_KEYS[i].key;
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+ }
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- _shell_debug = g_parse_debug_string (debug_string, keys,
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- G_N_ELEMENTS (keys));
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+ return g_strjoinv (":", (char**) enabled_flags);
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}
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static GLogWriterOutput
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@@ -395,10 +415,23 @@ reset_signal_handler_to_default (int signo)
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static void
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setup_debug_signal_listners (void)
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{
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- dump_gjs_stack_on_signal (SIGABRT);
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- dump_gjs_stack_on_signal (SIGFPE);
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- dump_gjs_stack_on_signal (SIGIOT);
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- dump_gjs_stack_on_signal (SIGTRAP);
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+ if ((_shell_debug & SHELL_DEBUG_BACKTRACE_ABORTS))
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+ {
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+ dump_gjs_stack_on_signal (SIGABRT);
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+ dump_gjs_stack_on_signal (SIGIOT);
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+ dump_gjs_stack_on_signal (SIGTRAP);
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+ }
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+ else
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+ {
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+ reset_signal_handler_to_default (SIGABRT);
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+ reset_signal_handler_to_default (SIGIOT);
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+ reset_signal_handler_to_default (SIGTRAP);
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+ }
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+
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+ if ((_shell_debug & SHELL_DEBUG_BACKTRACE_FPE))
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+ dump_gjs_stack_on_signal (SIGFPE);
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+ else
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+ reset_signal_handler_to_default (SIGFPE);
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if ((_shell_debug & SHELL_DEBUG_BACKTRACE_SEGFAULTS))
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{
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@@ -541,8 +574,9 @@ int
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main (int argc, char **argv)
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{
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g_autoptr (MetaContext) context = NULL;
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+ g_autofree char *debug_flags_string = NULL;
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GError *error = NULL;
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- const char *debug_flags;
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+ const char *shell_debug;
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int ecode = EXIT_SUCCESS;
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bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
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@@ -580,8 +614,14 @@ main (int argc, char **argv)
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g_setenv ("GJS_DEBUG_OUTPUT", "stderr", TRUE);
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g_setenv ("GJS_DEBUG_TOPICS", "JS ERROR;JS LOG", TRUE);
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- debug_flags = g_getenv ("SHELL_DEBUG");
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- shell_update_debug (debug_flags);
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+ shell_debug = g_getenv ("SHELL_DEBUG");
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+
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+ if (shell_debug)
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+ shell_update_debug (shell_debug);
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+ else
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+ _shell_debug = _default_debug_flags;
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+
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+ debug_flags_string = debug_flags_to_string ();
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shell_dbus_init (meta_context_is_replacing (context));
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shell_a11y_init ();
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@@ -596,7 +636,7 @@ main (int argc, char **argv)
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session_mode = is_gdm_mode ? (char *)"gdm" : (char *)"user";
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_shell_global_init ("session-mode", session_mode,
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- "debug-flags", debug_flags,
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+ "debug-flags", debug_flags_string,
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NULL);
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g_signal_connect (shell_global_get (), "notify::debug-flags",
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diff --git a/src/shell-global.c b/src/shell-global.c
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index 1676208..60b84e6 100644
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--- a/src/shell-global.c
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+++ b/src/shell-global.c
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@@ -1890,11 +1890,15 @@ shell_global_get_debug_flags (ShellGlobal *global)
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/**
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* shell_global_set_debug_flags:
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* @global: a #ShellGlobal
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- * @debug_flags: (nullable): A string for debugging flags
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+ * @debug_flags: (nullable): A comma-separated string of debugging flags
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*
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* Updates the debugging flags at runtime as the one set using the SHELL_DEBUG
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- * environment variables. Currently we support 'backtrace-warnings' and
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- * 'backtrace-segfaults' keys.
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+ * environment variables. Currently we support these keys:
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+ * - 'backtrace-warnings'
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+ * - 'backtrace-segfaults'
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+ * - 'backtrace-aborts'
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+ * - 'backtrace-math-errors'
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+ * - 'all'
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*/
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void
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shell_global_set_debug_flags (ShellGlobal *global,
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