forked from OSchip/llvm-project
72 lines
2.0 KiB
C++
72 lines
2.0 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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// 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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