60fe1f59d0
We should arguably have always been doing that. The state of libunwind is quite sad, so this commit adds several XFAILs to make the CI pass. We need to investigate why so many tests are not passing in some configurations, but I'll defer that to folks who actually work on libunwind for lack of bandwidth. Differential Revision: https://reviews.llvm.org/D110872
75 lines
2.1 KiB
C++
75 lines
2.1 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// REQUIRES: linux
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// TODO: Investigate these failures
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// XFAIL: asan, tsan, ubsan
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// TODO: Investigate this failure
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// XFAIL: 32bits-on-64bits
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// Basic test for _Unwind_ForcedUnwind.
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// See libcxxabi/test/forced_unwind* tests too.
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#include <assert.h>
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#include <dlfcn.h>
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#include <signal.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <unwind.h>
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void foo();
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_Unwind_Exception ex;
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_Unwind_Reason_Code stop(int version, _Unwind_Action actions,
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_Unwind_Exception_Class exceptionClass,
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_Unwind_Exception *exceptionObject,
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struct _Unwind_Context *context,
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void *stop_parameter) {
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assert(version == 1);
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assert((actions & _UA_FORCE_UNWIND) != 0);
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(void)exceptionClass;
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assert(exceptionObject == &ex);
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assert(stop_parameter == &foo);
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Dl_info info = {0, 0, 0, 0};
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// Unwind util the main is reached, above frames depend on the platform and
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// architecture.
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if (dladdr(reinterpret_cast<void *>(_Unwind_GetIP(context)), &info) &&
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info.dli_sname && !strcmp("main", info.dli_sname)) {
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_Exit(0);
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}
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return _URC_NO_REASON;
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}
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__attribute__((noinline)) void foo() {
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// Arm EHABI defines struct _Unwind_Control_Block as exception
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// object. Ensure struct _Unwind_Exception* work there too,
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// because _Unwind_Exception in this case is just an alias.
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struct _Unwind_Exception *e = &ex;
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#if defined(_LIBUNWIND_ARM_EHABI)
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// Create a mock exception object.
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memset(e, '\0', sizeof(*e));
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strcpy(reinterpret_cast<char *>(&e->exception_class), "CLNGUNW");
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#endif
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_Unwind_ForcedUnwind(e, stop, (void *)&foo);
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}
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int main() {
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foo();
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return -2;
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}
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