Attachment 135092 Details for Bug 103298 – debug: trigger a core dump on list corruption

[patch] debug: trigger a core dump on list corruption

file_103298.txt (text/plain), 2.18 KB, created by Alban Browaeys on 2017-10-26 20:57:55 UTC

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Creator: Alban Browaeys

Created: 2017-10-26 20:57:55 UTC

Size: 2.18 KB

patch

obsolete

>--- a/src/libinput.c
>+++ b/src/libinput.c
>@@ -32,6 +32,8 @@
> #include <sys/epoll.h>
> #include <unistd.h>
> #include <assert.h>
>+#include <stdlib.h>
>+#include <signal.h>
> 
> #include "libinput.h"
> #include "libinput-private.h"
>@@ -2001,9 +2003,27 @@
> 	return 0;
> }
> 
>+
>+/* let systemd-coredump gather backtrace with symbols */
>+static void
>+create_dump(void)
>+{
>+    if(!fork()) {
>+        // Crash the app in your favorite way here
>+        abort();
>+	raise(SIGSEGV);
>+    }
>+}
>+
> void
> libinput_device_init_event_listener(struct libinput_event_listener *listener)
> {
>+	fprintf(stderr, "LIBINPUT : device init event listener - %p which has prev %p and next %p\n", &listener->link, listener->link.prev, listener->link.next);
>+	if (listener->link.prev != listener->link.next) {
>+		fprintf(stderr, "LIBINPUT : device init event listener - %p which has prev %p and next %p\n", &listener->link, listener->link.prev, listener->link.next);
>+
>+		create_dump();
>+	}
> 	list_init(&listener->link);
> }
> 
>@@ -2018,13 +2038,21 @@
> {
> 	listener->notify_func = notify_func;
> 	listener->notify_func_data = notify_func_data;
>+	fprintf(stderr, "LIBINPUT : device PRE add event listener -  to %p\n", &device->event_listeners);
>+	fprintf(stderr, "LIBINPUT : device PRE add event listener -  %p which has prev %p and next %p\n", &listener->link, listener->link.prev, listener->link.next);
> 	list_insert(&device->event_listeners, &listener->link);
>+	fprintf(stderr, "LIBINPUT : device POST add event listener -  %p which has prev %p and next %p\n", &listener->link, listener->link.prev, listener->link.next);
>+	if (&listener->link == listener->link.prev
>+			&& listener->link.prev == listener->link.next)
>+		create_dump();
> }
> 
> void
> libinput_device_remove_event_listener(struct libinput_event_listener *listener)
> {
>+	fprintf(stderr, "LIBINPUT : device PRE remove event listener -  %p which has prev %p and next %p\n", &listener->link, listener->link.prev, listener->link.next);
> 	list_remove(&listener->link);
>+	fprintf(stderr, "LIBINPUT : device POST remove event listener -  %p which has prev %p and next %p\n", &listener->link, listener->link.prev, listener->link.next);
> }
> 
> static uint32_t
>

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Attachments on bug 103298: 134867 | 134868 | 135092 | 135130 | 135131 | 135132 | 135149

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