mirror of
https://github.com/fluencelabs/wasmer
synced 2024-12-13 22:25:40 +00:00
50 lines
1.0 KiB
C
50 lines
1.0 KiB
C
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/*
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* Copyright 2016 The Emscripten Authors. All rights reserved.
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* Emscripten is available under two separate licenses, the MIT license and the
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* University of Illinois/NCSA Open Source License. Both these licenses can be
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* found in the LICENSE file.
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*/
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#include <stdio.h>
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#include <setjmp.h>
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#include <stdlib.h>
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#include <string.h>
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int bottom, top;
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int run(int y) {
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// confuse stack
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char *s = (char *)alloca(100);
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memset(s, 1, 100);
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s[y] = y;
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s[y / 2] = y * 2;
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volatile int x = s[y];
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top = (int)alloca(4);
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if (x <= 2) return x;
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jmp_buf buf;
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printf("setjmp of %d\n", x);
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if (setjmp(buf) == 0) {
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printf("going\n");
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x += run(x / 2);
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longjmp(buf, 1);
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}
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printf("back\n");
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return x / 2;
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}
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int main(int argc, char **argv) {
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int sum = 0;
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for (int i = 0; i < argc * 2; i++) {
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bottom = (int)alloca(4);
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sum += run(10);
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// scorch the earth
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if (bottom < top) {
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memset((void *)bottom, 1, top - bottom);
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} else {
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memset((void *)top, 1, bottom - top);
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}
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}
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printf("%d\n", sum);
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return sum;
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}
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