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Leonard Mosescu 01431c2f61 Handle very large stack traces 
The main motivation for this change is to handle very large stack
traces, normally the result of infinite recursion. This part is
actually fairly simple, relaxing a few self-imposed limits on how
many frames we can unwind and the max size for stack memory.

Relaxing these limits requires stricter and more consistent checks for
stack unwinding. There are a number of unwinding invariants that apply
to all the platforms:

1. stack pointer (and frame pointer) must be within the stack memory
   (frame pointer, if preset, must point to the right frame too)
2. unwinding must monotonically increase SP
   (except for the first frame unwind, this must be a strict increase)
3. Instruction pointer (return address) must point to a valid location
4. stack pointer (and frame pointer) must be appropriately aligned

This change is focused on 2), which is enough to guarantee that the
unwinding doesn't get stuck in an infinite loop.

1) is implicitly validated part of accessing the stack memory
   (explicit checks might be nice though).
4) is ABI specific and while it may be valuable in catching suspicious
   frames is not in the scope of this change.
3) is also an interesting check but thanks to just-in-time compilation
   it's more complex than just calling 
   StackWalker::InstructionAddressSeemsValid() 
   and we don't want to drop parts of the callstack due to an overly
   conservative check.

Bug: chromium:735989

Change-Id: I9aaba77c7fd028942d77c87d51b5e6f94e136ddd
Reviewed-on: https://chromium-review.googlesource.com/563771
Reviewed-by: Mark Mentovai <mark@chromium.org>
Reviewed-by: Ivan Penkov <ivanpe@chromium.org>
2017-07-12 17:53:15 +00:00
android sample_app: enable C++11 for Android builds 2016-04-04 21:35:26 -04:00
autotools autotools: refresh config.{sub,guess} 2017-02-06 13:57:59 -05:00
docs Update links 2016-11-18 17:24:37 +00:00
m4 Only use O_CLOEXEC on platforms that support it 2017-05-10 21:32:37 +00:00
scripts travis: add a clang build 2017-02-17 16:53:16 +00:00
src Handle very large stack traces 2017-07-12 17:53:15 +00:00
.gitignore A couple of minor fixes 2017-07-11 17:24:47 +00:00
.travis.yml travis: add a clang build 2017-02-17 16:53:16 +00:00
aclocal.m4 Only use O_CLOEXEC on platforms that support it 2017-05-10 21:32:37 +00:00
appveyor.yml Appveyor CI for Windows MSVS build 2017-02-13 17:57:15 +00:00
AUTHORS Make build system less annoying (#8) r=bryner 2006-08-30 20:05:05 +00:00
breakpad-client.pc.in make "make install" also install headers and pkgconfig files 2014-08-27 02:10:55 +00:00
breakpad.pc.in make "make install" also install headers and pkgconfig files 2014-08-27 02:10:55 +00:00
ChangeLog Initial import, which includes the Windows client-side dump_syms tool, and 2006-08-25 21:14:45 +00:00
codereview.settings Switch to Gerrit for code reviews 2016-07-27 20:07:49 +00:00
configure Only use O_CLOEXEC on platforms that support it 2017-05-10 21:32:37 +00:00
configure.ac Only use O_CLOEXEC on platforms that support it 2017-05-10 21:32:37 +00:00
default.xml roll lss deps 2017-06-16 04:05:08 +00:00
DEPS roll lss deps 2017-06-16 04:05:08 +00:00
INSTALL autoreconf -f -i 2013-12-10 17:53:50 +00:00
LICENSE Renaming file COPYING to LICENSE and appending the disclaimer from src/common/convert_UTF.h to LICENSE. 2014-02-27 19:23:16 +00:00
Makefile.am autotools: move -W flags to configure detection 2017-02-16 22:48:56 +00:00
Makefile.in autotools: move -W flags to configure detection 2017-02-16 22:48:56 +00:00
NEWS Initial import, which includes the Windows client-side dump_syms tool, and 2006-08-25 21:14:45 +00:00
README.ANDROID Update symbol file documentation links. 2016-06-10 06:29:06 -04:00
README.md Appveyor CI for Windows MSVS build 2017-02-13 17:57:15 +00:00

README.md

Breakpad

Breakpad is a set of client and server components which implement a crash-reporting system.

Getting started (from master)

  1. First, download depot_tools and ensure that they’re in your PATH.

  2. Create a new directory for checking out the source code (it must be named breakpad).

    mkdir breakpad && cd breakpad

  3. Run the fetch tool from depot_tools to download all the source repos.

    fetch breakpad
cd src

  4. Build the source.

    ./configure && make

    You can also cd to another directory and run configure from there to build outside the source tree.

    This will build the processor tools (src/processor/minidump_stackwalk, src/processor/minidump_dump, etc), and when building on Linux it will also build the client libraries and some tools (src/tools/linux/dump_syms/dump_syms, src/tools/linux/md2core/minidump-2-core, etc).

  5. Optionally, run tests.

    make check

  6. Optionally, install the built libraries

    make install

If you need to reconfigure your build be sure to run make distclean first.

To update an existing checkout to a newer revision, you can git pull as usual, but then you should run gclient sync to ensure that the dependent repos are up-to-date.

To request change review

  1. Follow the steps above to get the source and build it.

  2. 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.

  3. 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.

  4. At https://chromium-review.googlesource.com/ you'll find your issue listed; click on it, then “Add reviewer”, and enter in the code reviewer. Depending on your settings, you may not see an email, but the reviewer has been notified with google-breakpad-dev@googlegroups.com always CC’d.