2 * Copyright (C) 2008 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 #ifndef ART_RUNTIME_FAULT_HANDLER_H_
19 #define ART_RUNTIME_FAULT_HANDLER_H_
26 #include "base/mutex.h" // For annotalysis.
43 // Unclaim signals and delete registered handlers.
45 void EnsureArtActionInFrontOfSignalChain();
47 void HandleFault(int sig, siginfo_t* info, void* context);
48 void HandleNestedSignal(int sig, siginfo_t* info, void* context);
50 // Added handlers are owned by the fault handler and will be freed on Shutdown().
51 void AddHandler(FaultHandler* handler, bool generated_code);
52 void RemoveHandler(FaultHandler* handler);
54 // Note that the following two functions are called in the context of a signal handler.
55 // The IsInGeneratedCode() function checks that the mutator lock is held before it
56 // calls GetMethodAndReturnPCAndSP().
57 // TODO: think about adding lock assertions and fake lock and unlock functions.
58 void GetMethodAndReturnPcAndSp(siginfo_t* siginfo, void* context, ArtMethod** out_method,
59 uintptr_t* out_return_pc, uintptr_t* out_sp)
60 NO_THREAD_SAFETY_ANALYSIS;
61 bool IsInGeneratedCode(siginfo_t* siginfo, void *context, bool check_dex_pc)
62 NO_THREAD_SAFETY_ANALYSIS;
65 // The HandleFaultByOtherHandlers function is only called by HandleFault function for generated code.
66 bool HandleFaultByOtherHandlers(int sig, siginfo_t* info, void* context)
67 NO_THREAD_SAFETY_ANALYSIS;
69 std::vector<FaultHandler*> generated_code_handlers_;
70 std::vector<FaultHandler*> other_handlers_;
71 struct sigaction oldaction_;
73 DISALLOW_COPY_AND_ASSIGN(FaultManager);
78 explicit FaultHandler(FaultManager* manager);
79 virtual ~FaultHandler() {}
80 FaultManager* GetFaultManager() {
84 virtual bool Action(int sig, siginfo_t* siginfo, void* context) = 0;
87 FaultManager* const manager_;
90 DISALLOW_COPY_AND_ASSIGN(FaultHandler);
93 class NullPointerHandler FINAL : public FaultHandler {
95 explicit NullPointerHandler(FaultManager* manager);
97 bool Action(int sig, siginfo_t* siginfo, void* context) OVERRIDE;
100 DISALLOW_COPY_AND_ASSIGN(NullPointerHandler);
103 class SuspensionHandler FINAL : public FaultHandler {
105 explicit SuspensionHandler(FaultManager* manager);
107 bool Action(int sig, siginfo_t* siginfo, void* context) OVERRIDE;
110 DISALLOW_COPY_AND_ASSIGN(SuspensionHandler);
113 class StackOverflowHandler FINAL : public FaultHandler {
115 explicit StackOverflowHandler(FaultManager* manager);
117 bool Action(int sig, siginfo_t* siginfo, void* context) OVERRIDE;
120 DISALLOW_COPY_AND_ASSIGN(StackOverflowHandler);
123 class JavaStackTraceHandler FINAL : public FaultHandler {
125 explicit JavaStackTraceHandler(FaultManager* manager);
127 bool Action(int sig, siginfo_t* siginfo, void* context) OVERRIDE NO_THREAD_SAFETY_ANALYSIS;
130 DISALLOW_COPY_AND_ASSIGN(JavaStackTraceHandler);
133 // Statically allocated so the the signal handler can Get access to it.
134 extern FaultManager fault_manager;
137 #endif // ART_RUNTIME_FAULT_HANDLER_H_