47e4282c19
Introduces a macro abstraction around capturing the bounds of a function, which many platforms handle subtly differently (Mach-O, and ELF, for example). Also introduce an arm64[^-]* -> aarch64 available feature, to enable more tests that would otherwise be excluded on Apple platforms, whose target triples tend to take the form e.g. 'arm64-apple-macosx', rather than 'aarch64-apple-macosx'. Third, we implement the has-sme check using the appropriate sysctl, as getauxval is not available on Darwin platforms.
76 lines
2.2 KiB
C++
76 lines
2.2 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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// UNSUPPORTED: target={{.*-aix.*}}
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// UNSUPPORTED: target={{.*-windows.*}}
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// TODO: Figure out why this fails with Memory Sanitizer.
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// XFAIL: msan
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// Basic test for _Unwind_ForcedUnwind.
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// See libcxxabi/test/forced_unwind* tests too.
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#undef NDEBUG
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#include "support/func_bounds.h"
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#include <assert.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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FUNC_BOUNDS_DECL(main_func);
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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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// Unwind until the main is reached, above frames depend on the platform and
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// architecture.
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uintptr_t ip = _Unwind_GetIP(context);
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if (ip >= (uintptr_t)FUNC_START(main_func) &&
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ip < (uintptr_t)FUNC_END(main_func)) {
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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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memcpy(&e->exception_class, "CLNGUNW", sizeof(e->exception_class));
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#endif
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_Unwind_ForcedUnwind(e, stop, (void *)&foo);
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}
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FUNC_ATTR(main_func) int main(int, char **) {
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foo();
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return -2;
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}
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