fix realloc

lukasstadler · lukasstadler · commit 8692a725915f · 2023-03-20T13:57:33.000+01:00
diff --git a/graalpython/com.oracle.graal.python.cext/src/obmalloc.c b/graalpython/com.oracle.graal.python.cext/src/obmalloc.c
@@ -193,7 +193,7 @@ void* PyMem_RawRealloc(void *ptr, size_t new_size) {
 	mem_head_t* old;
 
 	if (ptr != NULL) {
-		ptr = AS_MEM_HEAD(ptr);
+		old = AS_MEM_HEAD(ptr);
 
 		// account for the difference in size
 		if (old->size >= new_size) {
@@ -203,6 +203,8 @@ void* PyMem_RawRealloc(void *ptr, size_t new_size) {
 				return NULL;
 			}
 		}
+	} else {
+		old = NULL;
 	}
 
     mem_head_t* ptr_with_head = (mem_head_t*) realloc(old, new_size + sizeof(mem_head_t));

Original file line number	Diff line number	Diff line change
`@@ -193,7 +193,7 @@ void* PyMem_RawRealloc(void *ptr, size_t new_size) {`
`193`	`193`	`mem_head_t* old;`
`194`	`194`
`195`	`195`	`if (ptr != NULL) {`
`196`		`- ptr = AS_MEM_HEAD(ptr);`
	`196`	`+ old = AS_MEM_HEAD(ptr);`
`197`	`197`
`198`	`198`	`// account for the difference in size`
`199`	`199`	`if (old->size >= new_size) {`
`@@ -203,6 +203,8 @@ void* PyMem_RawRealloc(void *ptr, size_t new_size) {`
`203`	`203`	`return NULL;`
`204`	`204`	`}`
`205`	`205`	`}`
	`206`	`+ } else {`
	`207`	`+ old = NULL;`
`206`	`208`	`}`
`207`	`209`
`208`	`210`	`mem_head_t* ptr_with_head = (mem_head_t*) realloc(old, new_size + sizeof(mem_head_t));`