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
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
// Copyright (c) 2012, 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/ios/handler/ios_exception_minidump_generator.h"
#include "google_breakpad/common/minidump_exception_mac.h"
#include "client/minidump_file_writer-inl.h"
#include "common/scoped_ptr.h"
namespace {
const uint32_t kExpectedFinalFp = 4;
const uint32_t kExpectedFinalSp = 0;
const int kExceptionType = EXC_SOFTWARE;
const int kExceptionCode = MD_EXCEPTION_CODE_MAC_NS_EXCEPTION;
#ifdef HAS_ARM_SUPPORT
// Append the given 4 bytes value to the sp position of the stack represented
// by memory.
void AppendToMemory(uint8_t *memory, uint32_t sp, uint32_t data) {
assert(sizeof(data) == 4);
memcpy(memory + sp, &data, sizeof(data));
}
#endif
} // namespace
namespace google_breakpad {
IosExceptionMinidumpGenerator::IosExceptionMinidumpGenerator(
NSException *exception)
: MinidumpGenerator(mach_task_self(), 0) {
return_addresses_ = [[exception callStackReturnAddresses] retain];
SetExceptionInformation(kExceptionType,
kExceptionCode,
0,
pthread_mach_thread_np(pthread_self()));
}
IosExceptionMinidumpGenerator::~IosExceptionMinidumpGenerator() {
[return_addresses_ release];
}
bool IosExceptionMinidumpGenerator::WriteCrashingContext(
MDLocationDescriptor *register_location) {
#ifdef HAS_ARM_SUPPORT
TypedMDRVA<MDRawContextARM> context(&writer_);
if (!context.Allocate())
return false;
*register_location = context.location();
MDRawContextARM *context_ptr = context.get();
memset(context_ptr, 0, sizeof(MDRawContextARM));
context_ptr->context_flags = MD_CONTEXT_ARM_FULL;
context_ptr->iregs[7] = kExpectedFinalFp; // FP
context_ptr->iregs[13] = kExpectedFinalSp; // SP
uint32_t pc = GetPCFromException();
context_ptr->iregs[14] = pc; // LR
context_ptr->iregs[15] = pc; // PC
return true;
#else
assert(false);
return false;
#endif
}
uint32_t IosExceptionMinidumpGenerator::GetPCFromException() {
return [[return_addresses_ objectAtIndex:0] unsignedIntegerValue];
}
bool IosExceptionMinidumpGenerator::WriteExceptionStream(
MDRawDirectory *exception_stream) {
#ifdef HAS_ARM_SUPPORT
TypedMDRVA<MDRawExceptionStream> exception(&writer_);
if (!exception.Allocate())
return false;
exception_stream->stream_type = MD_EXCEPTION_STREAM;
exception_stream->location = exception.location();
MDRawExceptionStream *exception_ptr = exception.get();
exception_ptr->thread_id = pthread_mach_thread_np(pthread_self());
// This naming is confusing, but it is the proper translation from
// mach naming to minidump naming.
exception_ptr->exception_record.exception_code = kExceptionType;
exception_ptr->exception_record.exception_flags = kExceptionCode;
if (!WriteCrashingContext(&exception_ptr->thread_context))
return false;
exception_ptr->exception_record.exception_address = GetPCFromException();
return true;
#else
return MinidumpGenerator::WriteExceptionStream(exception_stream);
#endif
}
bool IosExceptionMinidumpGenerator::WriteThreadStream(mach_port_t thread_id,
MDRawThread *thread) {
#ifdef HAS_ARM_SUPPORT
if (pthread_mach_thread_np(pthread_self()) != thread_id)
return MinidumpGenerator::WriteThreadStream(thread_id, thread);
size_t frame_count = [return_addresses_ count];
UntypedMDRVA memory(&writer_);
size_t size = 8 * (frame_count - 1) + 4;
if (!memory.Allocate(size))
return false;
scoped_array<uint8_t> stack_memory(new uint8_t[size]);
uint32_t sp = size - 4;
uint32_t fp = 0;
uint32_t lr = [[return_addresses_ lastObject] unsignedIntegerValue];
for (int current_frame = frame_count - 2;
current_frame >= 0;
--current_frame) {
AppendToMemory(stack_memory.get(), sp, fp);
sp -= 4;
fp = sp;
AppendToMemory(stack_memory.get(), sp, lr);
sp -= 4;
lr = [[return_addresses_ objectAtIndex:current_frame] unsignedIntegerValue];
}
if (!memory.Copy(stack_memory.get(), size))
return false;
assert(sp == kExpectedFinalSp);
assert(fp == kExpectedFinalFp);
assert(lr == GetPCFromException());
thread->stack.start_of_memory_range = sp;
thread->stack.memory = memory.location();
memory_blocks_.push_back(thread->stack);
if (!WriteCrashingContext(&thread->thread_context))
return false;
thread->thread_id = thread_id;
return true;
#else
return MinidumpGenerator::WriteThreadStream(thread_id, thread);
#endif
}
} // namespace google_breakpad
|
