1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
// Copyright (c) 2010 Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "client/linux/crash_generation/crash_generation_client.h"
#include <stdio.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <algorithm>
#include "common/linux/eintr_wrapper.h"
#include "common/linux/ignore_ret.h"
#include "third_party/lss/linux_syscall_support.h"
namespace google_breakpad {
namespace {
class CrashGenerationClientImpl : public CrashGenerationClient {
public:
explicit CrashGenerationClientImpl(int server_fd) : server_fd_(server_fd) {}
virtual ~CrashGenerationClientImpl() {}
virtual bool RequestDump(const void* blob, size_t blob_size) {
int fds[2];
if (sys_pipe(fds) < 0)
return false;
static const unsigned kControlMsgSize = CMSG_SPACE(sizeof(int));
struct kernel_iovec iov;
iov.iov_base = const_cast<void*>(blob);
iov.iov_len = blob_size;
struct kernel_msghdr msg = {};
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
char cmsg[kControlMsgSize] = "";
msg.msg_control = cmsg;
msg.msg_controllen = sizeof(cmsg);
struct cmsghdr* hdr = CMSG_FIRSTHDR(&msg);
hdr->cmsg_level = SOL_SOCKET;
hdr->cmsg_type = SCM_RIGHTS;
hdr->cmsg_len = CMSG_LEN(sizeof(int));
int* p = reinterpret_cast<int*>(CMSG_DATA(hdr));
*p = fds[1];
ssize_t ret = HANDLE_EINTR(sys_sendmsg(server_fd_, &msg, 0));
sys_close(fds[1]);
if (ret < 0) {
sys_close(fds[0]);
return false;
}
// Wait for an ACK from the server.
char b;
IGNORE_RET(HANDLE_EINTR(sys_read(fds[0], &b, 1)));
sys_close(fds[0]);
return true;
}
private:
int server_fd_;
DISALLOW_COPY_AND_ASSIGN(CrashGenerationClientImpl);
};
} // namespace
// static
CrashGenerationClient* CrashGenerationClient::TryCreate(int server_fd) {
if (server_fd < 0)
return NULL;
return new CrashGenerationClientImpl(server_fd);
}
} // namespace google_breakpad
|
