b92b52c071
While doing this, refactor the intercept code to be easier to understand. The primary use case for this is to perform a parallel stack dump (both Java and native) for specific ANRs. Add tests for all of the different intercept conditions. Modify the tests to display the error message from the intercept response if there is an error. Bug: 254634348 Test: All unit tests pass. Test: Ran debuggerd on native and java processes. Test: Created a bugreport without error. Change-Id: Ic531ccee05b9a470748b815cf109e0076150a0b6
111 lines
3.1 KiB
C++
111 lines
3.1 KiB
C++
/*
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* Copyright 2016, 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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#pragma once
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#include <signal.h>
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#include <stdint.h>
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#include <sys/ucontext.h>
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#include <unistd.h>
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#include "dump_type.h"
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// Sockets in the ANDROID_SOCKET_NAMESPACE_RESERVED namespace.
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// Both sockets are SOCK_SEQPACKET sockets, so no explicit length field is needed.
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constexpr char kTombstonedCrashSocketName[] = "tombstoned_crash";
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constexpr char kTombstonedJavaTraceSocketName[] = "tombstoned_java_trace";
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constexpr char kTombstonedInterceptSocketName[] = "tombstoned_intercept";
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enum class CrashPacketType : uint8_t {
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// Initial request from crash_dump.
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kDumpRequest = 0,
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// Notification of a completed crash dump.
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// Sent after a dump is completed and the process has been untraced, but
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// before it has been resumed with SIGCONT.
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kCompletedDump,
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// Responses to kRequest.
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// kPerformDump sends along an output fd via cmsg(3).
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kPerformDump = 128,
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kAbortDump,
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};
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struct DumpRequest {
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DebuggerdDumpType dump_type;
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int32_t pid;
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};
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// The full packet must always be written, regardless of whether the union is used.
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struct TombstonedCrashPacket {
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CrashPacketType packet_type;
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union {
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DumpRequest dump_request;
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} packet;
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};
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// Comes with a file descriptor via SCM_RIGHTS.
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// This packet should be sent before an actual dump happens.
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struct InterceptRequest {
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DebuggerdDumpType dump_type;
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int32_t pid;
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};
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enum class InterceptStatus : uint8_t {
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// Returned when an intercept of the same type has already been
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// registered (and is active) for a given PID.
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kFailedAlreadyRegistered,
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// Returned in all other failure cases.
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kFailed,
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kStarted,
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kRegistered,
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};
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// Sent either immediately upon failure, or when the intercept has been used.
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struct InterceptResponse {
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InterceptStatus status;
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char error_message[127]; // always null-terminated
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};
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// Sent from handler to crash_dump via pipe.
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struct __attribute__((__packed__)) CrashInfoHeader {
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uint32_t version;
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};
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struct __attribute__((__packed__)) CrashInfoDataStatic {
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siginfo_t siginfo;
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ucontext_t ucontext;
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uintptr_t abort_msg_address;
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};
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struct __attribute__((__packed__)) CrashInfoDataDynamic : public CrashInfoDataStatic {
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uintptr_t fdsan_table_address;
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uintptr_t gwp_asan_state;
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uintptr_t gwp_asan_metadata;
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uintptr_t scudo_stack_depot;
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uintptr_t scudo_region_info;
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uintptr_t scudo_ring_buffer;
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size_t scudo_ring_buffer_size;
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bool recoverable_gwp_asan_crash;
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};
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struct __attribute__((__packed__)) CrashInfo {
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CrashInfoHeader header;
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union {
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CrashInfoDataStatic s;
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CrashInfoDataDynamic d;
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} data;
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};
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