From: Thomas Veerman <thomas@minix3.org>
Date: Fri, 30 Mar 2012 09:16:46 +0000 (+0000)
Subject: libmthread: add stack traces
X-Git-Tag: v3.2.1~602
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/expt.png?a=commitdiff_plain;h=8ae9987dcaddb0bbf9b658e4a6b780b4859f8604;p=minix.git

libmthread: add stack traces
---

diff --git a/include/minix/mthread.h b/include/minix/mthread.h
index 786557a09..1ac6b0c70 100644
--- a/include/minix/mthread.h
+++ b/include/minix/mthread.h
@@ -114,6 +114,8 @@ int mthread_setspecific(mthread_key_t key, void *value);
 void mthread_stats(void);
 void mthread_verify_f(char *f, int l);
 #define mthread_verify() mthread_verify_f(__FILE__, __LINE__)
+void mthread_stacktrace(mthread_thread_t t);
+void mthread_stacktraces(void);
 
 /* mutex.c */
 int mthread_mutex_destroy(mthread_mutex_t *mutex);
diff --git a/lib/libmthread/misc.c b/lib/libmthread/misc.c
index ae7a9b2df..c9c9f1775 100644
--- a/lib/libmthread/misc.c
+++ b/lib/libmthread/misc.c
@@ -109,3 +109,53 @@ void mthread_stats(void)
 }
 
 #endif
+
+
+/*===========================================================================*
+ *				mthread_stacktrace			     *
+ *===========================================================================*/
+void mthread_stacktrace(mthread_thread_t t)
+{
+  unsigned long bp, hbp, pc;
+  mthread_tcb_t *tcb;
+  ucontext_t *ctx;
+  mcontext_t *mtx;
+  struct stackframe_s *frame;
+
+  printf("thread %d: ", t);
+
+  tcb = mthread_find_tcb(t);
+  ctx = &tcb->m_context;
+  mtx = &ctx->uc_mcontext;
+  frame = &mtx->mc_p_reg;
+  bp = frame->fp;
+
+  while (bp) {
+	pc = ((unsigned long *) bp)[1];
+	hbp = ((unsigned long *) bp)[0];
+
+	printf("0x%lx ", (unsigned long) pc);
+
+	if (hbp != 0 && hbp <= bp) {
+		pc = -1;
+		printf("0x%lx ", (unsigned long) pc);
+		break;
+	}
+	bp = hbp;
+  }
+
+  printf("\n");
+}
+
+/*===========================================================================*
+ *				mthread_stacktraces			     *
+ *===========================================================================*/
+void mthread_stacktraces(void)
+{
+  mthread_thread_t t;
+
+  mthread_stacktrace(MAIN_THREAD);
+
+  for (t = (mthread_thread_t) 0; t < no_threads; t++)
+	mthread_stacktrace(t);
+}