6c7b3cb056
This fixes a few diverse issues that clang warns on in bionic. First, it specifies the appropriate converted types for format specifiers. The "h" and "hh" modifiers specify that the user is passing a short or char respectively. We were passing int deliberately in both cases and relying on the compiler to implicitly downcast to the smaller type. We also remove the non-standard "d" suffix from our double-precision floating point constant. This is an extension for gcc that clang does not implement. The third fix is to mark the c1 variable as unused, since it truly is neither read nor written. Change-Id: I4793352b9d3e58f1f4cac9e7581ef4b2a70b43c7
69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Contributed by: Intel Corporation
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*/
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#include <stdio.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unwind.h>
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#define noinline __attribute__((__noinline__))
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#define unused __attribute__((__unused__))
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static noinline _Unwind_Reason_Code stop_fn(int a unused,
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_Unwind_Action action,
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_Unwind_Exception_Class b unused, struct _Unwind_Exception* c unused,
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struct _Unwind_Context* d unused, void* e unused) {
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if ((action & _UA_END_OF_STACK) != 0) {
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// We reached the end of the stack without executing foo_cleanup. Test failed.
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abort();
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}
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return _URC_NO_REASON;
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}
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static void noinline foo_cleanup(char* param unused) {
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exit(42);
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}
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static void noinline do_crash() {
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char* ptr = NULL;
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*ptr = 0; // Deliberately cause a SIGSEGV.
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}
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static void noinline foo() {
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char c1 __attribute__((cleanup(foo_cleanup))) unused;
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do_crash();
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}
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// It's SEGSEGV handler. We start forced stack unwinding here.
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// If libgcc don't find dso for signal frame stack unwinding will be finished.
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// libgcc pass to stop_fn _UA_END_OF_STACK flag.
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// Test pass condition: stack unwinding through signal frame and foo1_handler execution.
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static void noinline sigsegv_handler(int param unused) {
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struct _Unwind_Exception* exception = (struct _Unwind_Exception*) malloc(sizeof(*exception));
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memset(&exception->exception_class, 0, sizeof(exception->exception_class));
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exception->exception_cleanup = 0;
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_Unwind_ForcedUnwind(exception, stop_fn, 0);
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}
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void do_test() {
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signal(SIGSEGV, &sigsegv_handler);
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foo();
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}
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