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Mirror of Google Breakpad project
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Joshua Peraza cfad51e954 arm64: strip PACs from link register values 
Pointer authentication codes are used to validate pointers against
accidental or malicious modification by storing a hash of the address
and a secret value in the pointer's unused, upper bits. The exact
bits used may vary by implementation and depend on the size of the
virtual address space of the target system, and whether other tagged
pointer features are in use.

Apple has implemented PACs in the Apple A12.
https://developer.apple.com/documentation/security/preparing_your_app_to_work_with_pointer_authentication

The documented method of stripping PACs from a pointer is to call
ptrauth_strip(), which ultimately emits an `xpaci` instruction, but
this option isn't available to the Breakpad processor not running on
the device. Instead, this patch selects likely address bits from
link register values by examining the address range of loaded modules.

Change-Id: I054bd1a03605719937fc85dcc8d8b9fe927f44be
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1713650
Reviewed-by: Mark Mentovai <mark@chromium.org>
2019-07-23 20:02:05 +00:00
.github support mistaken-pull-closer for automatically clearing incoming PRs 2018-12-07 01:49:55 +00:00
android sample_app: enable C++11 for Android builds 2016-04-04 21:35:26 -04:00
autotools Fix Travis build by running tests as root 2018-02-20 11:08:52 +00:00
docs Add optional field indicating multiple symbols at an address 2017-11-29 21:33:23 +00:00
m4 Only use O_CLOEXEC on platforms that support it 2017-05-10 21:32:37 +00:00
scripts Fix Travis build by running tests as root 2018-02-20 11:08:52 +00:00
src arm64: strip PACs from link register values 2019-07-23 20:02:05 +00:00
.gitignore drop glog from the checkout 2017-09-13 21:35:17 +00:00
.travis.yml Fix Travis build by running tests as root 2018-02-20 11:08:52 +00:00
aclocal.m4 Define and use a a new MDRawContextARM64 2018-08-01 19:27:25 +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 configure.ac: Workaround gtest-config not being installed. 2019-06-14 21:21:23 +00:00
configure.ac configure.ac: Workaround gtest-config not being installed. 2019-06-14 21:21:23 +00:00
default.xml Roll DEPS for googletest to 5ec7f0c4. 2019-02-28 03:09:32 +00:00
DEPS Roll DEPS for googletest to 5ec7f0c4. 2019-02-28 03:09:32 +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 Enable truncation of module ranges 2019-06-11 19:04:02 +00:00
Makefile.in configure.ac: Workaround gtest-config not being installed. 2019-06-14 21:21:23 +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.