commit 7c0c3793722aea293c45921ef50e4adcdf9645ce
author Mathias Agopian <mathias.agopian@gmail.com> Mon Sep 05 23:54:55 2011 -0700
committer Mathias Agopian <mathias@google.com> Fri Dec 09 14:38:57 2011 -0800
tree f8cf3c609929a34bbdf40d83396545f00d1fd6b5
parent 022d303116f742cd337852d37547e2ea24d97a25

implement pthread mutex deadlock detection

this works by building a directed graph of acquired
pthread mutexes and making sure there are no loops in
that graph.

this feature is enabled with:

    setprop debug.libc.pthread 1

when a potential deadlock is detected, a large warning is
output to the log with appropriate back traces.

currently disabled at compile-time. set PTHREAD_DEBUG_ENABLED=1
to enable.

Change-Id: I916eed2319599e8aaf8f229d3f18a8ddbec3aa8a

libc/bionic/libc_init_dynamic.c

diff --git a/libc/bionic/libc_init_dynamic.c b/libc/bionic/libc_init_dynamic.c
index 4bb2a81..1c8480c 100644
--- a/libc/bionic/libc_init_dynamic.c
+++ b/libc/bionic/libc_init_dynamic.c
@@ -76,6 +76,12 @@
 
     __libc_init_common(elfdata);
 
+    /* Setup pthread routines accordingly to the environment.
+     * Requires system properties
+     */
+    extern void pthread_debug_init(void);
+    pthread_debug_init();
+
     /* Setup malloc routines accordingly to the environment.
      * Requires system properties
      */