1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
#include <stdio.h>
#include <stdlib.h>
#include <emscripten/heap.h>
uint64_t nextAllocationSize = 16*1024*1024;
bool allocHasFailed = false;
void grow_memory() {
uint8_t *ptr = (uint8_t*)malloc((size_t)nextAllocationSize);
EM_ASM({}, ptr); // Pass ptr out to confuse LLVM that it is used, so it won't optimize it away in -O1 and higher.
size_t heapSize = emscripten_get_heap_size();
printf("Allocated %zu: %d. Heap size: %zu\n", (size_t)nextAllocationSize, ptr ? 1 : 0, heapSize);
if (ptr) {
if (!allocHasFailed) {
nextAllocationSize *= 2;
// Make sure we don't overflow, and also exercise malloc(-1) to gracefully return 0 in ABORTING_MALLOC=0 mode.
if (nextAllocationSize > 0xFFFFFFFFULL)
nextAllocationSize = 0xFFFFFFFFULL;
}
} else {
nextAllocationSize /= 2;
allocHasFailed = true;
}
}
int main() {
// Exhaust all available memory.
for(int i = 0; i < 50; ++i) {
grow_memory();
}
// If we get this far without crashing on OOM, we are ok!
printf("Test finished!\n");
return 0;
}
|
