text: #include <assert.h>
  #include <emscripten.h>
  #include <stdio.h>
  #include <vector>
  
  int main() {
    const int CHUNK_SIZE = 100 * 1024 * 1024;
    const int NUM_CHUNKS = 31; // total allocation will be over 3GB
  
    std::vector<std::vector<char>> chunks;
    chunks.resize(NUM_CHUNKS);
  
    puts("allocating");
  
    for (int i = 0; i < NUM_CHUNKS; i++) {
      printf("alloc %d\n", i);
      chunks[i].resize(CHUNK_SIZE);
    }
  
    puts("testing");
  
    for (int i = 0; i < NUM_CHUNKS; i++) {
      printf("test %d\n", i);
      chunks[i][i] = i;
      int fromJS = EM_ASM_INT({
        return HEAP8[$0];
      }, &chunks[i][i]);
      printf("wrote %d in C, read %d from JS\n", i, fromJS);
      EM_ASM_INT({
        HEAP8[$0] = 2 * $1;
      }, &chunks[i][i], i);
      int fromC = chunks[i][i];
      printf("wrote %d in JS, read %d from C\n", 2 * i, fromC);
    }
  
    puts("success");
  }
  
  