2b2ae0c88e
Reduce the amount of time that a process remains paused by pausing its threads, fetching their registers, and then performing unwinding on a copy of its address space. This also works around a kernel change that's in 4.9 that prevents ptrace from reading memory of processes that we don't have immediate permissions to ptrace (even if we previously ptraced them). Bug: http://b/62112103 Bug: http://b/63989615 Test: treehugger Change-Id: I7b9cc5dd8f54a354bc61f1bda0d2b7a8a55733c4
49 lines
1.8 KiB
C++
49 lines
1.8 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 <string>
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <android-base/unique_fd.h>
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// *** WARNING ***
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// tombstoned's sockets are SOCK_SEQPACKET sockets.
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// Short reads are treated as errors and short writes are assumed to not happen.
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// Sends a packet with an attached fd.
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ssize_t send_fd(int sockfd, const void* _Nonnull data, size_t len, android::base::unique_fd fd);
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// Receives a packet and optionally, its attached fd.
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// If out_fd is non-null, packets can optionally have an attached fd.
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// If out_fd is null, received packets must not have an attached fd.
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//
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// Errors:
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// EOVERFLOW: sockfd is SOCK_DGRAM or SOCK_SEQPACKET and buffer is too small.
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// The first len bytes of the packet are stored in data, but the
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// rest of the packet is dropped.
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// ERANGE: too many file descriptors were attached to the packet.
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// ENOMSG: not enough file descriptors were attached to the packet.
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//
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// plus any errors returned by the underlying recvmsg.
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ssize_t recv_fd(int sockfd, void* _Nonnull data, size_t len,
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android::base::unique_fd* _Nullable out_fd);
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std::string get_process_name(pid_t pid);
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std::string get_thread_name(pid_t tid);
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