| commit | f25a4112004efca7065068e87155757ef821d1e9 | [log] [tgz] |
|---|---|---|
| author | Lars Volker <lv@cloudera.com> | Tue May 24 18:49:35 2016 |
| committer | Ivan Penkov <ivanpe@chromium.org> | Tue May 24 18:49:35 2016 |
| tree | 5f6a4526979c4003709da7f74a9ad4f7f0efba63 | |
| parent | faeb1f9b2b45cd4e0bee0a677076cbe962034b75 [diff] |
Fix stack collection with size limit src/client/linux/minidump_writer/minidump_writer.cc:273 obtains the stack info by calling GetStackInfo(). That method will return the stack base address, aligned to the bottom of the memory page that 'stack_pointer' is in. After that it will cap the size of the memory area to be copied into the minidump to 'max_stack_len', starting from the base address, if the caller requested so. This will be the case when collecting reduced stacks, as introduced by this change: https://breakpad.appspot.com/487002/ In such cases the caller will request 2048 bytes of memory. However GetStackInfo() will have aligned the base address to the page boundary, by default 4096 bytes. If the stack, which grows towards the base address from the top ends before the 2048 bytes of the first block, then we will not collect any useful part of the stack. As a fix we skip chunks of 'max_stack_len' bytes starting from the base address until the stack_pointer is actually contained in the chunk, which we will add to the minidump file. BUG=https://bugs.chromium.org/p/google-breakpad/issues/detail?id=695 R=ivanpe@chromium.org Review URL: https://codereview.chromium.org/1959643004 . Patch from Lars Volker <lv@cloudera.com>.
Breakpad is a set of client and server components which implement a crash-reporting system.
# Configure CXXFLAGS=-m32 CFLAGS=-m32 CPPFLAGS=-m32 ./configure # Build make # Test make check # Install make install
If you need to reconfigure your build be sure to run make distclean first.
Get a copy of depot_tools repo. http://dev.chromium.org/developers/how-tos/install-depot-tools
Create a new directory for checking out the source code. mkdir breakpad && cd breakpad
Run the fetch tool from depot_tools to download all the source repos. fetch breakpad
Make changes. Build and test your changes. For core code like processor use methods above. For linux/mac/windows, there are test targets in each project file.
Commit your changes to your local repo and upload them to the server. http://dev.chromium.org/developers/contributing-code e.g. git commit ... && git cl upload ... You will be prompted for credential and a description.
At https://codereview.chromium.org/ you'll find your issue listed; click on it, and select Publish+Mail, and enter in the code reviewer and CC google-breakpad-dev@googlegroups.com