test/core/test_longjmp2.c

/*
 * Copyright 2016 The Emscripten Authors.  All rights reserved.
 * Emscripten is available under two separate licenses, the MIT license and the
 * University of Illinois/NCSA Open Source License.  Both these licenses can be
 * found in the LICENSE file.
 */

#include <setjmp.h>
#include <stdio.h>

typedef struct {
  jmp_buf* jmp;
} jmp_state;

void stack_manipulate_func(jmp_state* s, int level) {
  jmp_buf buf;

  printf("Entering stack_manipulate_func, level: %d\n", level);

  if (level == 0) {
    s->jmp = &buf;
    if (setjmp(*(s->jmp)) == 0) {
      printf("Setjmp normal execution path, level: %d\n", level);
      stack_manipulate_func(s, level + 1);
    } else {
      printf("Setjmp error execution path, level: %d\n", level);
    }
  } else {
    printf("Perform longjmp at level %d\n", level);
    longjmp(*(s->jmp), 1);
  }

  printf("Exiting stack_manipulate_func, level: %d\n", level);
}

int main(int argc, char* argv[]) {
  jmp_state s;
  s.jmp = NULL;
  stack_manipulate_func(&s, 0);

  return 0;
}