Breakpad

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

Getting started in 32-bit mode (from trunk)

# 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