Since this produces a few false positives, also implemented a whitelist
mechanism to not report them.

Also, add a couple of tests and implemented automated testing against
test-expectations file.

Bug: v8:9321
Change-Id: I2915a29fe1891e8bbc51118bbd95ae072c8de023
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1773243
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63456}

This is a minimalistic script usable for creating packages of gcmole
together with the corresponding Clang. Such packages are used on V8's
infrastructure.

R=machenbach@chromium.org
BUG=v8:8813

Change-Id: Iee3594a3acdc7a4e5b5d5628e5557725d27d9ced
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1523068
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60237}

This updates the existing bootstrap.sh script for gcmole to work against
LLVM and Clang version 8.0 releases. This is a follow-up to a previous
change which adapted the gcmole plugin to compile against those same
versions.

R=mslekova@chromium.org
BUG=v8:8813

Change-Id: Id6052fb9a7ec8a63d205eab2d4e233e2121c733d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1511275Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60116}

After introducing the new pointer-containing Object class in V8 (see
https://docs.google.com/document/d/1_w49sakC1XM1OptjTurBDqO86NE16FH8LwbeUAtrbCo/edit),
gcmole stopped finding errorneous usage of raw pointers in functions that could
trigger GC. This CL modifies the heuristics of the tool to classify Object and
MaybeObject instances as raw pointers, thus giving back the missing warnings.

Updated the gcmole implementation to support modern llvm (tested with llvm 8.0)
for which additional support for MaterializeTemporaryExpr, ExprWithCleanups and
UnaryExprOrTypeTraitExpr was needed.

Basic tests are added to make it harder to introduce such errors without
noticing in the future.

This version gives a lot of false positives when ran on the whole project, see
https://docs.google.com/document/d/1K7eJ0f6m9QX6FZIjZnt_GFtUsjEOC_LpiAwZbcAA3f8/edit

R=jkummerow@chromium.org,mstarzinger@chromium.org

Bug: v8:8813
Change-Id: Ic0190a4bc2642eda8880d9f7b30b5145a76a7d89
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1494754
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60099}

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/13950017

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14393 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

GCMole is a simple static analysis tool that searches for GC-usafe evaluation order dependent callsites.

Review URL: http://codereview.chromium.org/6812002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7540 ce2b1a6d-e550-0410-aec6-3dcde31c8c00