From f72f01abd89640b083b4067e4be399448f0fb6ce Mon Sep 17 00:00:00 2001
From: Yuta Saito <kateinoigakukun@gmail.com>
Date: Wed, 8 Dec 2021 22:19:52 +0900
Subject: [wasm] add unit test suite for fiber, register scan, sjlj in platform
 dir

---
 wasm/tests/setjmp_test.c | 108 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 wasm/tests/setjmp_test.c

(limited to 'wasm/tests/setjmp_test.c')

diff --git a/wasm/tests/setjmp_test.c b/wasm/tests/setjmp_test.c
new file mode 100644
index 0000000000..f263dcfa3e
--- /dev/null
+++ b/wasm/tests/setjmp_test.c
@@ -0,0 +1,108 @@
+#include "wasm/setjmp.h"
+#include "wasm/asyncify.h"
+#include "wasm/machine.h"
+#include <stdio.h>
+#include <assert.h>
+
+void check_direct(void) {
+  rb_wasm_jmp_buf buf;
+  int val;
+  printf("[%s] start\n", __func__);
+  printf("[%s] call rb_wasm_setjmp\n", __func__);
+  if ((val = rb_wasm_setjmp(buf)) == 0) {
+    printf("[%s] rb_wasm_setjmp(buf) == 0\n", __func__);
+    printf("[%s] call rb_wasm_longjmp(buf, 2)\n", __func__);
+    rb_wasm_longjmp(buf, 2);
+    assert(0 && "unreachable after longjmp");
+  } else {
+    printf("[%s] rb_wasm_setjmp(buf) == %d\n", __func__, val);
+    printf("[%s] sp = %p\n", __func__, rb_wasm_get_stack_pointer());
+    assert(val == 2 && "unexpected returned value");
+  }
+  printf("[%s] end\n", __func__);
+}
+
+void jump_to_dst(rb_wasm_jmp_buf *dst) {
+  rb_wasm_jmp_buf buf;
+  printf("[%s] start sp = %p\n", __func__, rb_wasm_get_stack_pointer());
+  printf("[%s] call rb_wasm_setjmp\n", __func__);
+  if (rb_wasm_setjmp(buf) == 0) {
+    printf("[%s] rb_wasm_setjmp(buf) == 0\n", __func__);
+    printf("[%s] call rb_wasm_longjmp(dst, 4)\n", __func__);
+    rb_wasm_longjmp(*dst, 4);
+    assert(0 && "unreachable after longjmp");
+  } else {
+    assert(0 && "unreachable");
+  }
+  printf("[%s] end\n", __func__);
+}
+
+void check_jump_two_level(void) {
+  rb_wasm_jmp_buf buf;
+  int val;
+  printf("[%s] start\n", __func__);
+  printf("[%s] call rb_wasm_setjmp\n", __func__);
+  if ((val = rb_wasm_setjmp(buf)) == 0) {
+    printf("[%s] rb_wasm_setjmp(buf) == 0\n", __func__);
+    printf("[%s] call jump_to_dst(&buf)\n", __func__);
+    jump_to_dst(&buf);
+    assert(0 && "unreachable after longjmp");
+  } else {
+    printf("[%s] rb_wasm_setjmp(buf) == %d\n", __func__, val);
+    assert(val == 4 && "unexpected returned value");
+  }
+  printf("[%s] end\n", __func__);
+}
+
+void check_reuse(void) {
+  rb_wasm_jmp_buf buf;
+  int val;
+  printf("[%s] start\n", __func__);
+  printf("[%s] call rb_wasm_setjmp\n", __func__);
+  if ((val = rb_wasm_setjmp(buf)) == 0) {
+    printf("[%s] rb_wasm_setjmp(buf) == 0\n", __func__);
+    printf("[%s] call rb_wasm_longjmp(buf, 2)\n", __func__);
+    rb_wasm_longjmp(buf, 2);
+    assert(0 && "unreachable after longjmp");
+  } else {
+    printf("[%s] rb_wasm_setjmp(buf) == %d\n", __func__, val);
+    if (val < 5) {
+      printf("[%s] re-call rb_wasm_longjmp(buf, %d)\n", __func__, val + 1);
+      rb_wasm_longjmp(buf, val + 1);
+    }
+  }
+  printf("[%s] end\n", __func__);
+}
+
+void check_stack_ptr(void) {
+  static void *normal_sp;
+  rb_wasm_jmp_buf buf;
+  normal_sp = rb_wasm_get_stack_pointer();
+
+  printf("[%s] start sp = %p\n", __func__, normal_sp);
+  printf("[%s] call rb_wasm_setjmp\n", __func__);
+  if (rb_wasm_setjmp(buf) == 0) {
+    printf("[%s] call jump_to_dst(&buf)\n", __func__);
+    jump_to_dst(&buf);
+    assert(0 && "unreachable after longjmp");
+  } else {
+    printf("[%s] sp = %p\n", __func__, rb_wasm_get_stack_pointer());
+    assert(rb_wasm_get_stack_pointer() == normal_sp);
+  }
+  printf("[%s] end\n", __func__);
+}
+
+// top level function should not be inlined to stop unwinding immediately after this function returns
+__attribute__((noinline))
+int start(int argc, char **argv) {
+  check_direct();
+  check_jump_two_level();
+  check_reuse();
+  check_stack_ptr();
+  return 0;
+}
+
+int main(int argc, char **argv) {
+  extern int rb_wasm_rt_start(int (main)(int argc, char **argv), int argc, char **argv);
+  return rb_wasm_rt_start(start, argc, argv);
+}
-- 
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