|
236
|
1 // -*- C++ -*-
|
|
|
2 //===----------------------------------------------------------------------===//
|
|
|
3 //
|
|
|
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
|
5 // See https://llvm.org/LICENSE.txt for license information.
|
|
|
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
|
7 //
|
|
|
8 //===----------------------------------------------------------------------===//
|
|
|
9
|
|
|
10 // REQUIRES: linux
|
|
|
11
|
|
|
12 // TODO: Figure out why this fails with Memory Sanitizer.
|
|
|
13 // XFAIL: msan
|
|
|
14
|
|
|
15 // Basic test for _Unwind_ForcedUnwind.
|
|
|
16 // See libcxxabi/test/forced_unwind* tests too.
|
|
|
17
|
|
|
18 #undef NDEBUG
|
|
|
19 #include <assert.h>
|
|
|
20 #include <dlfcn.h>
|
|
|
21 #include <signal.h>
|
|
|
22 #include <stdint.h>
|
|
|
23 #include <stdio.h>
|
|
|
24 #include <stdlib.h>
|
|
|
25 #include <string.h>
|
|
|
26 #include <sys/types.h>
|
|
|
27 #include <unistd.h>
|
|
|
28 #include <unwind.h>
|
|
|
29
|
|
|
30 void foo();
|
|
|
31 _Unwind_Exception ex;
|
|
|
32
|
|
|
33 _Unwind_Reason_Code stop(int version, _Unwind_Action actions,
|
|
|
34 _Unwind_Exception_Class exceptionClass,
|
|
|
35 _Unwind_Exception *exceptionObject,
|
|
|
36 struct _Unwind_Context *context,
|
|
|
37 void *stop_parameter) {
|
|
|
38 assert(version == 1);
|
|
|
39 assert((actions & _UA_FORCE_UNWIND) != 0);
|
|
|
40 (void)exceptionClass;
|
|
|
41 assert(exceptionObject == &ex);
|
|
|
42 assert(stop_parameter == &foo);
|
|
|
43
|
|
|
44 Dl_info info = {0, 0, 0, 0};
|
|
|
45
|
|
|
46 // Unwind util the main is reached, above frames depend on the platform and
|
|
|
47 // architecture.
|
|
|
48 if (dladdr(reinterpret_cast<void *>(_Unwind_GetIP(context)), &info) &&
|
|
|
49 info.dli_sname && !strcmp("main", info.dli_sname)) {
|
|
|
50 _Exit(0);
|
|
|
51 }
|
|
|
52 return _URC_NO_REASON;
|
|
|
53 }
|
|
|
54
|
|
|
55 __attribute__((noinline)) void foo() {
|
|
|
56
|
|
|
57 // Arm EHABI defines struct _Unwind_Control_Block as exception
|
|
|
58 // object. Ensure struct _Unwind_Exception* work there too,
|
|
|
59 // because _Unwind_Exception in this case is just an alias.
|
|
|
60 struct _Unwind_Exception *e = &ex;
|
|
|
61 #if defined(_LIBUNWIND_ARM_EHABI)
|
|
|
62 // Create a mock exception object.
|
|
|
63 memset(e, '\0', sizeof(*e));
|
|
|
64 strcpy(reinterpret_cast<char *>(&e->exception_class), "CLNGUNW");
|
|
|
65 #endif
|
|
|
66 _Unwind_ForcedUnwind(e, stop, (void *)&foo);
|
|
|
67 }
|
|
|
68
|
|
|
69 int main() {
|
|
|
70 foo();
|
|
|
71 return -2;
|
|
|
72 }
|
