[dev.power64] code review 152570049: all: merge default into dev.power64

misc/cgo/test/callback_c_gccgo.c

 // Copyright 2013 The Go Authors.  All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 // +build gccgo
 
 #include "_cgo_export.h"
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
 
 /* Test calling panic from C.  This is what SWIG does.  */
 
 extern void _cgo_panic(const char *);
+extern void *_cgo_allocate(size_t);
 
 void
 callPanic(void)
 {
         _cgo_panic("panic from C");
 }
+
+/* Test calling cgo_allocate from C. This is what SWIG does. */
+
+typedef struct List List;
+struct List
+{
+        List *next;
+        int x;
+};
+
+void
+callCgoAllocate(void)
+{
+        int i;
+        List *l, *head, **tail;
+········
+        // Make sure this doesn't crash.
+        // And make sure it returns non-nil.
+        if(_cgo_allocate(0) == 0) {
+                fprintf(stderr, "callCgoAllocate: alloc 0 returned nil\n");
+                exit(2);
+        }
+
+        head = 0;
+        tail = &head;
+        for(i=0; i<100; i++) {
+                l = _cgo_allocate(sizeof *l);
+                l->x = i;
+                l->next = 0;
+                *tail = l;
+                tail = &l->next;
+        }
+········
+        gc();
+········
+        l = head;
+        for(i=0; i<100; i++) {
+                if(l->x != i) {
+                        fprintf(stderr, "callCgoAllocate: lost memory\n");
+                        exit(2);
+                }
+                l = l->next;
+        }
+        if(l != 0) {
+                fprintf(stderr, "callCgoAllocate: lost memory\n");
+                exit(2);
+        }
+}
+