[wasm2c] Fix realloc check in wasm_rt_grow_memory (#1171)

binji · web-flow · commit cf261f2bd561 · 2019-09-25T17:04:14.000-04:00
See issue #1159.
diff --git a/wasm2c/wasm-rt-impl.c b/wasm2c/wasm-rt-impl.c
@@ -111,7 +111,7 @@ uint32_t wasm_rt_grow_memory(wasm_rt_memory_t* memory, uint32_t delta) {
   }
   uint32_t new_size = new_pages * PAGE_SIZE;
   uint8_t* new_data = realloc(memory->data, new_size);
-  if (memory->data == NULL) {
+  if (new_data == NULL) {
     return (uint32_t)-1;
   }
   memory->pages = new_pages;

Original file line number	Diff line number	Diff line change
`@@ -111,7 +111,7 @@ uint32_t wasm_rt_grow_memory(wasm_rt_memory_t* memory, uint32_t delta) {`
`111`	`111`	`}`
`112`	`112`	`uint32_t new_size = new_pages * PAGE_SIZE;`
`113`	`113`	`uint8_t* new_data = realloc(memory->data, new_size);`
`114`		`- if (memory->data == NULL) {`
	`114`	`+ if (new_data == NULL) {`
`115`	`115`	`return (uint32_t)-1;`
`116`	`116`	`}`
`117`	`117`	`memory->pages = new_pages;`