[PATCH] fix PR48299 by merging changes for thread_leak_test.c from upstream

[Jack Howarth]

   Currently the testsuite/boehm-gc.c/thread_leak_test.c executation test
will hang on several targets including x86_64-apple-darwin10/11 for -m32/-m64.
The attached patch eliminates this issue, PR48299, by merging in the
upstream changes for this testcase from...

https://raw.github.com/ivmai/bdwgc/master/tests/thread_leak_test.c

The only changes made to the upstram test case was retaining the use of...

GC_find_leak = 1;

rather than...

GC_set_find_leak(1);

and formatting style changes. Tested on x86_64-apple-darwin10 and
x86_64-apple-darwin11. Okay for gcc trunk for gcc 4.7 (as the
timeouts in the testsuite are very annoying)?
         Jack
ps I was uncertain how much detail we need in the changelog as the
upstream commit logs aren't very informative...

https://github.com/ivmai/bdwgc/commits/master/tests/thread_leak_test.c

2012-02-27  Jack Howarth  <howarth@bromo.med.uc.edu>
	    Patrick Marlier  <patrick.marlier@gmail.com>

	PR boehm-gc/48299
	testsuite/boehm-gc.c/thread_leak_test.c: Merge upstream changes.

boehm-gc/

Index: testsuite/boehm-gc.c/thread_leak_test.c
===================================================================
--- testsuite/boehm-gc.c/thread_leak_test.c	(revision 184602)
+++ testsuite/boehm-gc.c/thread_leak_test.c	(working copy)
@@ -1,13 +1,22 @@
-#define GC_LINUX_THREADS
+#ifndef GC_THREADS
+# define GC_THREADS
+#endif
 #include "leak_detector.h"
-#include <pthread.h>
+#ifdef GC_PTHREADS
+# include <pthread.h>
+#else
+# include <windows.h>
+#endif
 #include <stdio.h>
 
-void * test(void * arg) {
+#ifdef GC_PTHREADS
+  void * test(void * arg)
+#else
+  DWORD WINAPI test(LPVOID arg)
+#endif
+{
     int *p[10];
     int i;
-    GC_find_leak = 1; /* for new collect versions not compiled  */
-    /* with -DFIND_LEAK.                                        */
     for (i = 0; i < 10; ++i) {
         p[i] = malloc(sizeof(int)+i);
     }
@@ -15,23 +24,47 @@
     for (i = 1; i < 10; ++i) {
         free(p[i]);
     }
-}       
+#ifdef GC_PTHREADS
+    return arg;
+#else
+    return (DWORD)(GC_word)arg;
+#endif
+}
 
 #define NTHREADS 5
 
-int main() {
+int main(void) {
     int i;
+#ifdef GC_PTHREADS
     pthread_t t[NTHREADS];
+#else
+    HANDLE t[NTHREADS];
+    DWORD thread_id;
+#endif
     int code;
 
+    GC_find_leak = 1;    /* for new collect versions not compiled       */
+    GC_INIT();
     for (i = 0; i < NTHREADS; ++i) {
-	if ((code = pthread_create(t + i, 0, test, 0)) != 0) {
-    	    printf("Thread creation failed %d\n", code);
+#ifdef GC_PTHREADS
+       code = pthread_create(t + i, 0, test, 0);
+#else
+       t[i] = CreateThread(NULL, 0, test, 0, 0, &thread_id);
+       code = t[i] != NULL ? 0 : (int)GetLastError();
+#endif
+       if (code != 0) {
+          printf("Thread creation failed %d\n", code);
         }
     }
     for (i = 0; i < NTHREADS; ++i) {
-	if ((code = pthread_join(t[i], 0)) != 0) {
-            printf("Thread join failed %lu\n", code);
+#ifdef GC_PTHREADS
+       code = pthread_join(t[i], 0);
+#else
+       code = WaitForSingleObject(t[i], INFINITE) == WAIT_OBJECT_0 ? 0 :
+                                                        (int)GetLastError();
+#endif
+       if (code != 0) {
+          printf("Thread join failed %d\n", code);
         }
     }
     CHECK_LEAKS();