зеркало из https://github.com/github/ruby.git
109 строки
3.3 KiB
C
109 строки
3.3 KiB
C
#include "wasm/setjmp.h"
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#include "wasm/asyncify.h"
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#include "wasm/machine.h"
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#include <stdio.h>
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#include <assert.h>
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void check_direct(void) {
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rb_wasm_jmp_buf buf;
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int val;
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printf("[%s] start\n", __func__);
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printf("[%s] call rb_wasm_setjmp\n", __func__);
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if ((val = rb_wasm_setjmp(buf)) == 0) {
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printf("[%s] rb_wasm_setjmp(buf) == 0\n", __func__);
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printf("[%s] call rb_wasm_longjmp(buf, 2)\n", __func__);
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rb_wasm_longjmp(buf, 2);
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assert(0 && "unreachable after longjmp");
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} else {
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printf("[%s] rb_wasm_setjmp(buf) == %d\n", __func__, val);
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printf("[%s] sp = %p\n", __func__, rb_wasm_get_stack_pointer());
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assert(val == 2 && "unexpected returned value");
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}
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printf("[%s] end\n", __func__);
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}
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void jump_to_dst(rb_wasm_jmp_buf *dst) {
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rb_wasm_jmp_buf buf;
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printf("[%s] start sp = %p\n", __func__, rb_wasm_get_stack_pointer());
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printf("[%s] call rb_wasm_setjmp\n", __func__);
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if (rb_wasm_setjmp(buf) == 0) {
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printf("[%s] rb_wasm_setjmp(buf) == 0\n", __func__);
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printf("[%s] call rb_wasm_longjmp(dst, 4)\n", __func__);
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rb_wasm_longjmp(*dst, 4);
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assert(0 && "unreachable after longjmp");
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} else {
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assert(0 && "unreachable");
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}
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printf("[%s] end\n", __func__);
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}
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void check_jump_two_level(void) {
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rb_wasm_jmp_buf buf;
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int val;
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printf("[%s] start\n", __func__);
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printf("[%s] call rb_wasm_setjmp\n", __func__);
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if ((val = rb_wasm_setjmp(buf)) == 0) {
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printf("[%s] rb_wasm_setjmp(buf) == 0\n", __func__);
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printf("[%s] call jump_to_dst(&buf)\n", __func__);
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jump_to_dst(&buf);
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assert(0 && "unreachable after longjmp");
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} else {
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printf("[%s] rb_wasm_setjmp(buf) == %d\n", __func__, val);
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assert(val == 4 && "unexpected returned value");
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}
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printf("[%s] end\n", __func__);
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}
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void check_reuse(void) {
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rb_wasm_jmp_buf buf;
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int val;
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printf("[%s] start\n", __func__);
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printf("[%s] call rb_wasm_setjmp\n", __func__);
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if ((val = rb_wasm_setjmp(buf)) == 0) {
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printf("[%s] rb_wasm_setjmp(buf) == 0\n", __func__);
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printf("[%s] call rb_wasm_longjmp(buf, 2)\n", __func__);
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rb_wasm_longjmp(buf, 2);
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assert(0 && "unreachable after longjmp");
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} else {
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printf("[%s] rb_wasm_setjmp(buf) == %d\n", __func__, val);
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if (val < 5) {
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printf("[%s] re-call rb_wasm_longjmp(buf, %d)\n", __func__, val + 1);
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rb_wasm_longjmp(buf, val + 1);
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}
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}
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printf("[%s] end\n", __func__);
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}
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void check_stack_ptr(void) {
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static void *normal_sp;
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rb_wasm_jmp_buf buf;
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normal_sp = rb_wasm_get_stack_pointer();
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printf("[%s] start sp = %p\n", __func__, normal_sp);
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printf("[%s] call rb_wasm_setjmp\n", __func__);
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if (rb_wasm_setjmp(buf) == 0) {
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printf("[%s] call jump_to_dst(&buf)\n", __func__);
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jump_to_dst(&buf);
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assert(0 && "unreachable after longjmp");
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} else {
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printf("[%s] sp = %p\n", __func__, rb_wasm_get_stack_pointer());
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assert(rb_wasm_get_stack_pointer() == normal_sp);
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}
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printf("[%s] end\n", __func__);
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}
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// top level function should not be inlined to stop unwinding immediately after this function returns
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__attribute__((noinline))
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int start(int argc, char **argv) {
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check_direct();
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check_jump_two_level();
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check_reuse();
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check_stack_ptr();
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return 0;
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}
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int main(int argc, char **argv) {
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extern int rb_wasm_rt_start(int (main)(int argc, char **argv), int argc, char **argv);
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return rb_wasm_rt_start(start, argc, argv);
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}
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