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#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");
#ifdef REPORT_RESULT
REPORT_RESULT(0);
#endif
}
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