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如何找到Chrome的Crash原因？

发表于 2024-03-28
更新于 2024-05-03
分类于 技术专栏
阅读量 3828
字数统计 20547

某天，现场的远程驾驶司机吐槽说我们的远程驾驶页面崩溃了，而且频率还不低，一天发生个两三次，有的时候是直接整个浏览器直接闪退，有的时候是：

这个时候司机师傅就一脸懵圈。

于是我就踏上了漫漫长路，找到浏览器崩溃的原因。

1、排查问题原因

首先最先想到的思路就是，驾仓的代码页面是不是有内存泄露？于是在本地进行模拟驾仓的接入和退出，果然，立马找到了，确实页面长期开启，加上接管车辆频繁的话，内存在缓慢增长，有内存泄露！！

于是一通操作，找到泄露的代码，一通修改并上线，这下想着这么点问题难不住我的~

好的，代码发布线上了，可以喝杯茶了。

2、问题仍未解决

隔天，群里又有人@我了，还是反馈仍然存在崩溃现象，(ÒωÓױ)！

于是我迅速振作起来，看来内存泄露不一定会导致浏览器闪退，应该是别的原因。那还有啥办法呢？这个时候我就想到，Chrome Crash的时候会dump出一份闪退的文件，可以看看具体闪退的原因，找到原因不就好查原因了吗？这个时候禁不住为自己自豪~

于是开始走上了分析Chrome的Crash dump文件的心酸之旅。

3、反解Crash的dump文件

本来以为应该很容易就可以找到dump的堆栈信息，没想到我还是太年轻了。

来到Chrome的官网：# Decoding Crash Dumps

🤩，步骤写的蛮详细的嘛，于是我开始按照文档说的开整。

3.1、获取dump文件

我用的是Ubuntu系统，dump文件放在~/.config/google-chrome/Crash Reports/completed下面，一般是这样的：

好，拿到dmp文件了，那我们就可以反解了；官网推荐用breakpad。在搜索过程中，才发现这个breakpad使用还贼广泛，好多地方都会借鉴Chrome这套Crash系统收集机制呢~

3.2、breakpad

breakpad是一个跨平台的崩溃转储和分析框架和工具集合。

Breakpad由三个主要组件：

  • client 是一个库,以library的形式内置在你的应用中，以配置客户端发生了崩溃时写入一个minidump文件

  • symbol dumper 是一个程序，读取由编译器产生的调试信息（debugging information），并生成一个使用Breakpad格式的符号文件( symbol file)

  • processor 是一个程序,读取 minidump文件 和 symbol file,生成可读的c/c++ 堆栈跟踪(Stack trace.)

默认情况下，当崩溃时breakpad会生成一个minidump文件， 在不同平台上的实现机制不一样：

  • 在windows平台上，使用微软提供的 SetUnhandledExceptionFilter() 方法来实现。
  • 在OS X平台上，通过创建一个线程来监听 Mach Exception port 来实现。
  • 在Linux平台上，通过设置一个信号处理器来监听 SIGILL SIGSEGV 等异常信号。

当minidump被生成后，在不同平台上也使用不同的机制来上传crash dump文件。

如果出现下载失败，请参考解决chromium.googlesource在国内无法通过git下载的问题

1$ git clone https://chromium.googlesource.com/breakpad/breakpad $ cd breakpad 
2$ ./configure 
3$ make 
4$ make install

又是熟悉的C++编译流程，并且果然不出我所料，编译这种库没有那么容易一次性编译通过，果然问题来了：

1In file included from ./src/client/linux/dump_writer_common/thread_info.h:36,
2                 from ./src/client/linux/minidump_writer/linux_dumper.h:53,
3                 from ./src/client/linux/minidump_writer/minidump_writer.h:41,
4                 from src/tools/linux/core2md/core2md.cc:37:
5./src/common/memory_allocator.h:49:10: fatal error: third_party/lss/linux_syscall_support.h: No such file or directory
6   49 | #include "third_party/lss/linux_syscall_support.h"
7      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8compilation terminated.
9make: *** [Makefile:5667: src/tools/linux/core2md/core2md.o] Error 1

哦，报了某个头文件不存在，于是网上找了下解决方案：

先把头文件下载下来

1git clone https://chromium.googlesource.com/linux-syscall-support src/third_party/lss

也可以用github镜像：https://github.com/getsentry/linux-syscall-support

放到src/third_party/lss目录下即可。

重新编译，又报错了：

看了下，是语法错误，还好我略懂些C++语法，在dump_syms.cc文件中对于指针的使用有问题，应该使用get语法来获取指针的，这个错误在三天后的版本中被更正过来了，我真的是好巧不巧，下载到了有问题的代码 🤦🏻‍♀️。

编译通过之后，就可以在/usr/local/bin中找到minidump_stackwalk这个工具了。

我们可以执行刚才示意图上的dmp文件：minidump_stackwalk xxxxx.dmp > xxxx.txt

得到的文件大概如下所示：

1
2GPU: UNKNOWN
3
4Crash reason:  SIGTRAP
5Crash address: 0x0
6Process uptime: 11175 seconds
7
8// ??CompositorTileWorker
9Thread 10 (crashed)
10 0  chrome + 0x96ef0e8
11    rax = 0x00007fcf05a10f98   rdx = 0x0000000000000000
12    rcx = 0x0000000000000000   rbx = 0x0000000000012000
13    rsi = 0x0000000000012000   rdi = 0x00007fcf05a10f98
14    rbp = 0x00007fcf05a10fa0   rsp = 0x00007fcf05a10f90
15     r8 = 0x0000000000000000    r9 = 0x657a69736e617073
16    r10 = 0x0000000000010383   r11 = 0x0000000000000293
17    r12 = 0x0000560944711440   r13 = 0x0000000000000000
18    r14 = 0x00002a4cc22d0000   r15 = 0x0000000000000003
19    rip = 0x000056094bdff0e8
20    Found by: given as instruction pointer in context

很明显，这样的文件除了看出是一堆寄存器之外，是看不到任何有用信息的，就知道是收到SIGTRAP信号，只在 SIGTRAP Browser Crash找到Chrome是发生了共享内存段不够分配导致的。

于是我们还得结合Chrome版本的符号文件进行映射的，类似于soucemap。

那Chrome版本的符号文件到哪里获取呢？难道我自己手动编译Chrome源码？

一开始我确实尝试的，后来放弃了，Chrome源码太恐怖了，编译费时费力不说，还不一定能够找到你当时浏览器的版本对应的代码。

于是我开始在网上搜索。官网提供的# Crash Reports里面提到了[crsym](https://goto.google.com/crsym/)可惜不是给外部开发用的，登录需要时谷歌员工。

于是我经过层层搜索，终于找到了Chrome符号文件的下载地址。

3.3、下载Symbol文件

在这么一份不起眼的文档里面，终于找到了Google的symbol文件的下载地址：

所以按照文档要求的格式：https://edgedl.me.gvt1.com/chrome/linux/symbols/google-chrome-debug-info-linux64-${VERSION}.zip，里面的版本号可以在这里找到：

ok，终于可以下载符号文件了。

3.4、开始反解带有堆栈的dmp

我们首先得把刚才下载的符号文件进行一波处理。

下载下来的文件里面都是一堆*.debug文件的，我们这里还得继续借用刚才breakpad的另一个工具：dump_syms，如果该工具没有，需要你自己编译一下：

  • Mac系统的编译参考：# How To Add Breakpad To Your Mac Client Application

    • 但其实按照官方说的我是没编译成功，最后用了这个命令：xcodebuild -project dump_syms.xcodeproj -configuration Release

  • Linux在上面编译的时候好像就自动生成了的，没有的话到src/tools/linux/dump_syms/下执行一下常规编译；

接着利用dump_syms开始生成符号文件：

1$ ./breakpadNew/src/tools/linux/dump_syms/dump_syms ./debug-info/chrome.debug > chrome.sym
2$ head -n1 chrome.sym
  • 第一个命令是利用下载的zip包中的*.debug文件转为symbol文件
  • 第二个命令head得到的一个哈希值，这个值应该会和dmp文件提示的这个一致：(不加symbol文件的时候，会提示找不到symbol文件)，比如下面：

结果如下：

可以看到我们创建了一个symbols文件夹，里面按照symbol的名字，比如想利用chrome的符号文件，就创建了chrome文件夹，再创建一个和刚才使用head命令得到的哈希值的文件夹，把刚才的chrome.sym文件copy过去；如下图：

请记住上面的文件夹目录都是按照名称严格命名的，否则待会在dmp反解的时候还是不会出来对应的堆栈

接下来到最后关键的一个环节了，得到完整的堆栈文件：

1/usr/local/bin/minidump_stackwalk 04299da9-7ca8-4c8d-af9e-1b80a49ca1c6.dmp ~/debug-info/symbols/  > crash02221620.txt

最后得到的堆栈文件类似这样的：

1Operating system: Linux
2                  5.15.0 -46-generic #49~20.04.1-Ubuntu SMP Thu Aug 4 19:15:44 UTC 2022 x86_64
3CPU: amd64
4     family 6 model 167 stepping 1
5     16 CPUs
6
7GPU: UNKNOWN
8
9Crash reason:  SIGTRAP
10Crash address: 0x0
11Process uptime: 6217 seconds
12
13Thread 10 (crashed)
14 0  chrome!partition_alloc::internal::OnNoMemoryInternal(unsigned long) [oom.cc : 58 + 0x1]
15    rax = 0x00007fa29f160f98   rdx = 0x0000000000000000
16    rcx = 0x0000000000000000   rbx = 0x0000000000009000
17    rsi = 0x0000000000009000   rdi = 0x00007fa29f160f98
18    rbp = 0x00007fa29f160fa0   rsp = 0x00007fa29f160f90
19     r8 = 0x0000000000000000    r9 = 0x657a69736e617073
20    r10 = 0x00000000000087e6   r11 = 0x0000000000000293
21    r12 = 0x0000555a364d4440   r13 = 0x0000000000000000
22    r14 = 0x00000d0c7ce98000   r15 = 0x0000000000000003
23    rip = 0x0000555a3dbc20e8
24    Found by: given as instruction pointer in context
25 1  chrome!partition_alloc::TerminateBecauseOutOfMemory(unsigned long) [oom.cc : 65 + 0x5]
26    rbx = 0x0000000000009000   rbp = 0x00007fa29f160fb0
27    rsp = 0x00007fa29f160fb0   r12 = 0x0000555a364d4440
28    r13 = 0x0000000000000000   r14 = 0x00000d0c7ce98000
29    r15 = 0x0000000000000003   rip = 0x0000555a3dbc20f9
30    Found by: call frame info
31 2  chrome!partition_alloc::internal::OnNoMemory(unsigned long) [oom.cc : 75 + 0x8]
32    rbx = 0x0000000000009000   rbp = 0x00007fa29f160fd0
33    rsp = 0x00007fa29f160fc0   r12 = 0x0000555a364d4440
34    r13 = 0x0000000000000000   r14 = 0x00000d0c7ce98000
35    r15 = 0x0000000000000003   rip = 0x0000555a3dbc2116
36    Found by: call frame info
37 3  chrome!partition_alloc::internal::SetSystemPagesAccessInternal(unsigned long, unsigned long, partition_alloc::PageAccessibilityConfiguration) [page_allocator_internals_posix.h : 262 + 0x8]
38    rbx = 0x0000000000009000   rbp = 0x00007fa29f161020
39    rsp = 0x00007fa29f160fe0   r12 = 0x0000555a364d4440
40    r13 = 0x0000000000000000   r14 = 0x00000d0c7ce98000
41    r15 = 0x0000000000000003   rip = 0x0000555a37159730
42    Found by: call frame info
43 4  chrome!partition_alloc::internal::PartitionBucket::SlowPathAlloc(partition_alloc::PartitionRoot*, partition_alloc::internal::AllocFlags, unsigned long, unsigned long, bool*) [page_allocator.cc : 287 + 0x18]
44    rbx = 0x0000555a426bf8c8   rbp = 0x00007fa29f161110
45    rsp = 0x00007fa29f161030   r12 = 0x00007fa29f16116f
46    r13 = 0x00000d0c7ce014c0   r14 = 0x0000000000000000
47    r15 = 0x0000555a426bed40   rip = 0x0000555a371592c6
48    Found by: call frame info
49 5  chrome!allocator_shim::internal::PartitionMalloc(allocator_shim::AllocatorDispatch const*, unsigned long, void*) [partition_root.h : 1263 + 0x1d]
50    rbx = 0x0000555a426bed80   rbp = 0x00007fa29f1611d0
51    rsp = 0x00007fa29f161120   r12 = 0x00000000000087e6
52    r13 = 0x0000555a426bed40   r14 = 0x00000d0c00090b00
53    r15 = 0x0000000000000000   rip = 0x0000555a37157552
54    Found by: call frame info
55 6  chrome!base::allocator::dispatcher::internal::DispatcherImpl<base::PoissonAllocationSampler>::AllocFn(allocator_shim::AllocatorDispatch const*, unsigned long, void*) [dispatcher_internal.h : 113 + 0x20]
56    rbp = 0x00007fa29f161270   rsp = 0x00007fa29f1611e0
57    rip = 0x0000555a395a7f8e
58    Found by: previous frame's frame pointer
59 7  chrome!operator new(unsigned long) [allocator_shim.cc : 189 + 0xa]
60    rbp = 0x00007fa29f1612b0   rsp = 0x00007fa29f161280
61    rip = 0x0000555a36d2b502
62    Found by: previous frame's frame pointer
63 8  chrome!void std::__Cr::vector<unsigned char, std::__Cr::allocator<unsigned char> >::__assign_with_size<base::CheckedContiguousIterator<unsigned char const>, base::CheckedContiguousIterator<unsigned char const> >(base::CheckedContiguousIterator<unsigned char const>, base::CheckedContiguousIterator<unsigned char const>, long) [new : 269 + 0x8]
64    rbx = 0x00000d0c7ccdd7e0   rbp = 0x00007fa29f161300
65    rsp = 0x00007fa29f1612c0   r12 = 0x00000000000087e2
66    r13 = 0x00007fa29f161328   r14 = 0x0000000000000000
67    r15 = 0x00000000000087e2   rip = 0x0000555a39a83180
68    Found by: call frame info
69 9  chrome!storage::BlobDataItem::CreateBytes(base::span<unsigned char const, 18446744073709551615ul, unsigned char const*>) [vector : 1443 + 0x27]
70    rbx = 0x00000000000087e2   rbp = 0x00007fa29f161390
71    rsp = 0x00007fa29f161310   r12 = 0x00000d0c0335db18
72    r13 = 0x0000555a41d98a60   r14 = 0x00000d0c7ccdd7c0
73    r15 = 0x00000d0c5ee18000   rip = 0x0000555a39a830c5
74    Found by: call frame info
7510  chrome!storage::BlobDataBuilder::AppendData(base::span<unsigned char const, 18446744073709551615ul, unsigned char const*>) [blob_data_builder.cc : 100 + 0xb]
76    rbx = 0x00000d0c0054be00   rbp = 0x00007fa29f1613c0
77    rsp = 0x00007fa29f1613a0   r12 = 0x00000d0c0335db18
78    r13 = 0x0000555a41d98a60   r14 = 0x00000000000087e2
79    r15 = 0x00000d0c0335dab0   rip = 0x0000555a39a82bb4
80    Found by: call frame info
8111  chrome!storage::BlobRegistryImpl::BlobUnderConstruction::ResolvedAllBlobDependencies() [blob_registry_impl.cc : 382 + 0x1e]
82    rbx = 0x00000d0c7c647200   rbp = 0x00007fa29f161420
83    rsp = 0x00007fa29f1613d0   r12 = 0x00000d0c0335db18
84    r13 = 0x0000555a41d98a60   r14 = 0x0000000000000000
85    r15 = 0x00000d0c0335dab0   rip = 0x0000555a3a3ca3e6
86    Found by: call frame info
8712  chrome!storage::BlobRegistryImpl::Register(mojo::PendingReceiver<blink::mojom::Blob>, std::__Cr::basic_string<char, std::__Cr::char_traits<char>, std::__Cr::allocator<char> > const&, std::__Cr::basic_string<char, std::__Cr::char_traits<char>, std::__Cr::allocator<char> > const&, std::__Cr::basic_string<char, std::__Cr::char_traits<char>, std::__Cr::allocator<char> > const&, std::__Cr::vector<mojo::StructPtr<blink::mojom::DataElement>, std::__Cr::allocator<mojo::StructPtr<blink::mojom::DataElement> > >, base::OnceCallback<void ()>) [blob_registry_impl.cc : 295 + 0x8]
88    rbx = 0x0000000000000001   rbp = 0x00007fa29f161570
89    rsp = 0x00007fa29f161430   r12 = 0x00000d0c0054be00
90    r13 = 0x00000d0c7cd98c40   r14 = 0x00000d0c7ce0ec00
91    r15 = 0x00000d0c001488d8   rip = 0x0000555a3a3cc74f
92    Found by: call frame info
9313  chrome!blink::mojom::BlobRegistryStubDispatch::AcceptWithResponder(blink::mojom::BlobRegistry*, mojo::Message*, std::__Cr::unique_ptr<mojo::MessageReceiverWithStatus, std::__Cr::default_delete<mojo::MessageReceiverWithStatus> >) [blob_registry.mojom.cc : 1385 + 0x25]
94    rbx = 0x00007fa29f1615f0   rbp = 0x00007fa29f1616d0
95    rsp = 0x00007fa29f161580   r12 = 0x00000d0c5ed880a8
96    r13 = 0x00000d0c7ce0e080   r14 = 0x00000d0c7ce482c0
97    r15 = 0x00000d0c7bf97f90   rip = 0x0000555a3a3b35f4
98    Found by: call frame info
9914  chrome!mojo::InterfaceEndpointClient::HandleIncomingMessageThunk::Accept(mojo::Message*) [interface_endpoint_client.cc : 970 + 0x6]
100    rbx = 0x00000d0c00b27ed0   rbp = 0x00007fa29f161750
101    rsp = 0x00007fa29f1616e0   r12 = 0x00000d0c02231e80
102    r13 = 0x0000000000000005   r14 = 0x00000d0c02231e80
103    r15 = 0x00000d0c7ce0e080   rip = 0x0000555a373a9c86
104    Found by: call frame info
10515  chrome!mojo::internal::MultiplexRouter::Accept(mojo::Message*) [message_dispatcher.cc : 48 + 0x3]
106    rbp = 0x00007fa29f161af0   rsp = 0x00007fa29f161760
107    rip = 0x0000555a37e0fd1f
108    Found by: previous frame's frame pointer
10916  chrome!mojo::MessageDispatcher::Accept(mojo::Message*) [message_dispatcher.cc : 43 + 0x38]
110    rbp = 0x00007fa29f161bb0   rsp = 0x00007fa29f161b00
111    rip = 0x0000555a376b8450
112    Found by: previous frame's frame pointer
11317  chrome!base::internal::Invoker<base::internal::BindState<void (mojo::Connector::*)(char const*, unsigned int), base::internal::UnretainedWrapper<mojo::Connector, base::unretained_traits::MayNotDangle, (partition_alloc::internal::RawPtrTraits)0>, base::internal::UnretainedWrapper<char const, base::unretained_traits::MayNotDangle, (partition_alloc::internal::RawPtrTraits)0> >, void (unsigned int)>::Run(base::internal::BindStateBase*, unsigned int) [connector.cc : 561 + 0x68]
114    rbp = 0x00007fa29f161d60   rsp = 0x00007fa29f161bc0
115    rip = 0x0000555a376ba3bf
116    Found by: previous frame's frame pointer
11718  chrome!base::internal::Invoker<base::internal::BindState<void (*)(base::RepeatingCallback<void (unsigned int)> const&, unsigned int, mojo::HandleSignalsState const&), base::RepeatingCallback<void (unsigned int)> >, void (unsigned int, mojo::HandleSignalsState const&)>::Run(base::internal::BindStateBase*, unsigned int, mojo::HandleSignalsState const&) [callback.h : 344 + 0x1c]
118    rbp = 0x00007fa29f161d80   rsp = 0x00007fa29f161d70
119    rip = 0x0000555a3bcbd669
120    Found by: previous frame's frame pointer
12119  chrome!mojo::SimpleWatcher::Context::CallNotify(MojoTrapEvent const*) [callback.h : 344 + 0x5]
122    rbp = 0x00007fa29f161e20   rsp = 0x00007fa29f161d90
123    rip = 0x0000555a3700e85b
124    Found by: previous frame's frame pointer
12520  chrome!mojo::core::ipcz_driver::MojoTrap::TrapEventHandler(IpczTrapEvent const*) [mojo_trap.cc : 599 + 0x2]
126    rbp = 0x00007fa29f161f00   rsp = 0x00007fa29f161e30
127    rip = 0x0000555a370f1e1d
128    Found by: previous frame's frame pointer
12921  chrome!ipcz::Router::AcceptInboundParcel(ipcz::OperationContext const&, std::__Cr::unique_ptr<ipcz::Parcel, std::__Cr::default_delete<ipcz::Parcel> >) [trap_event_dispatcher.cc : 30 + 0x2d]
130    rbp = 0x00007fa29f162360   rsp = 0x00007fa29f161f10
131    rip = 0x0000555a37586dfa
132    Found by: previous frame's frame pointer
13322  chrome!ipcz::NodeLink::OnAcceptParcel(ipcz::msg::AcceptParcel&) [node_link.cc : 1036 + 0xb]
134    rbx = 0x0000000000000001   rbp = 0x00007fa29f162480
135    rsp = 0x00007fa29f162370   r12 = 0x00000d0c02281680
136    r13 = 0x00000d0c00550738   r14 = 0x00000d0c005506e0
137    r15 = 0x00000d0c006635d0   rip = 0x0000555a37584ef0
138    Found by: call frame info
13923  chrome!ipcz::msg::NodeMessageListener::OnTransportMessage(ipcz::DriverTransport::RawMessage const&, ipcz::DriverTransport const&) [node_messages_generator.h : 0 + 0x12]
140    rbx = 0x0000000000000000   rbp = 0x00007fa29f1625c0
141    rsp = 0x00007fa29f162490   r12 = 0x00000d0c01036dc0
142    r13 = 0x0000000000000000   r14 = 0x00000d0c005506e0
143    r15 = 0x00007fa29f1625d0   rip = 0x0000555a37243e21
144    Found by: call frame info
14524  chrome!ipcz::(anonymous namespace)::NotifyTransport(unsigned long, void const*, unsigned long, unsigned long const*, unsigned long, unsigned int, void const*) [driver_transport.cc : 126 + 0xb]
146    rbx = 0x00000d0c005506e0   rbp = 0x00007fa29f162610
147    rsp = 0x00007fa29f1625d0   r12 = 0x00000d0c00629490
148    r13 = 0x0000000000000000   r14 = 0x00000d0c01036dc0
149    r15 = 0x0000000000000000   rip = 0x0000555a39c81416
150    Found by: call frame info
15125  chrome!mojo::core::Channel::OnReadComplete(unsigned long, unsigned long*) [transport.cc : 662 + 0x14]
152    rbx = 0x00000d0c5ec94008   rbp = 0x00007fa29f162820
153    rsp = 0x00007fa29f162620   r12 = 0x00000d0c00629490
154    r13 = 0x0000000000000000   r14 = 0x0000000000000000
155    r15 = 0x0000000000000000   rip = 0x0000555a374578b4
156    Found by: call frame info
15726  chrome!base::MessagePumpLibevent::FdWatchController::OnFdReadable() [channel_posix.cc : 298 + 0xf]
158    rbx = 0x00000d0c00089bf0   rbp = 0x00007fa29f162b60
159    rsp = 0x00007fa29f162830   r12 = 0x0000000000007a00
160    r13 = 0x0000000000000000   r14 = 0x0000000000007a00
161    r15 = 0x0000000000000000   rip = 0x0000555a3745646f
162    Found by: call frame info
16327  chrome!base::MessagePumpEpoll::Run(base::MessagePump::Delegate*) [message_pump_epoll.cc : 346 + 0x8]
164    rbx = 0x00ffffffffffffff   rbp = 0x00007fa29f163090
165    rsp = 0x00007fa29f162b70   r12 = 0x0000000000000001
166    r13 = 0x0000093c002e2150   r14 = 0x0000093c002e2150
167    r15 = 0x0000555a35b8b316   rip = 0x0000555a37459e73
168    Found by: call frame info
16928  chrome!base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool, base::TimeDelta) [thread_controller_with_message_pump_impl.cc : 640 + 0x3]
170    rbp = 0x00007fa29f163120   rsp = 0x00007fa29f1630a0
171    rip = 0x0000555a38b70c74
172    Found by: previous frame's frame pointer
17329  chrome!base::RunLoop::Run(base::Location const&) [thread_controller_with_message_pump_impl.cc : 0 + 0x16]
174    rbp = 0x00007fa29f1631d0   rsp = 0x00007fa29f163130
175    rip = 0x0000555a38b7019b
176    Found by: previous frame's frame pointer
17730  chrome!content::BrowserProcessIOThread::Run(base::RunLoop*) [thread.cc : 337 + 0x2a]
178    rbp = 0x00007fa29f163220   rsp = 0x00007fa29f1631e0
179    rip = 0x0000555a38b6fbaa
180    Found by: previous frame's frame pointer
18131  chrome!base::Thread::ThreadMain() [thread.cc : 409 + 0x6]
182    rbx = 0x0000093c002c9500   rbp = 0x00007fa29f1632b0
183    rsp = 0x00007fa29f163230   r14 = 0x0000000000000003
184    rip = 0x0000555a3982c3e7
185    Found by: call frame info
18632  chrome!base::(anonymous namespace)::ThreadFunc(void*) [platform_thread_posix.cc : 101 + 0x37]
187    rbx = 0x00007fa29f164700   rbp = 0x00007fa29f1632f0
188    rsp = 0x00007fa29f1632c0   r12 = 0x0000093c00253a20
189    r13 = 0x00007fa29f164060   r14 = 0x0000093c002c9500
190    r15 = 0x00007fa29f164700   rip = 0x0000555a3715daad
191    Found by: call frame info
19233  libpthread.so.0 + 0x8609
193    rsp = 0x00007fa29f163300   rip = 0x00007fa2a80d3609
194    Found by: stack scanning
19534  libc.so.6 + 0x11f133
196    rsp = 0x00007fa29f1633c0   rip = 0x00007fa2a7305133
197    Found by: stack scanning

4、分析

好了，最后知道Chrome崩溃的原因了：OOM；在分配某些内存的时候，发现内存不够用了，我们尝试去读取Chrome的一些源码，了解Chrome的一些基本概念：

  • Mojo：作为进程间通信的一个服务
  • Blob 存储：存储渲染进程和浏览器进程一些不可变原始二进制数据
  • Blink：浏览器的布局引擎

最后定位以及结合现象还是发现了GPU内存不够导致的；这块分析后面再出个文章；

参考

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