Commit Graph

7 Commits

Author SHA1 Message Date
clemensh
4b0edcf7e0 [gcmole] Fixes for unreachable code
Enforce the invariant that unreachable implicates an empty live set and
fix the implementation of |= and &= operator.
This is a fix-up for http://crrev.com/2694103005.

R=vegorov@chromium.org
CC=mstarzinger@chromium.org, machenbach@chromium.org
BUG=v8:5970

Review-Url: https://codereview.chromium.org/2691103008
Cr-Commit-Position: refs/heads/master@{#43251}
2017-02-16 14:13:11 +00:00
clemensh
b8787e348d [gcmole] Avoid hardcoded maximum of 256 locals
This CL changes the datastructure to store live variables from a
std::bitset<256> to a std::vector<bool> to support an arbitrary number
of locals. Unfortunately, std::vector<bool> does not define |= and &=
operators, so I added them on the Environment class.

R=vegorov@chromium.org, mstarzinger@chromium.org, machenbach@chromium.org
BUG=v8:5970

Review-Url: https://codereview.chromium.org/2694103005
Cr-Commit-Position: refs/heads/master@{#43216}
2017-02-15 14:43:22 +00:00
svenpanne@chromium.org
6e75bfc35b Update gcmole to a more recent clang/llvm.
* Changes for 2.9:
     * Use CXX in Makefile instead of hardwired g++, we need a more
       modern GCC than 4.6 later, anyway.

* Changes for 3.0:
     * Use llvm namespace.
     * Diagnostic => DiagnosticsEngine.

* Changes for 3.1:
     * The BlockDeclRefExpr AST node is gone.
     * The structure of the CXXNewExpr AST node has changed.
     * Path changed from Release to Release+Asserts.
     * Use clang++ instead of -cc1, otherwise we lose the system include
       paths.

* Changes for 3.2:
     none needed

* Changes for 3.3:
     * Use lookup_iterator::begin/end instead of first/second.

* Changes for 3.4:
     * createItaniumMangleContext => ItaniumMangleContext::create.

* Changes for 3.5:
     * clang uses <type_traits> now, so -std=c++0x is needed.
     * Type-trait-related AST changes.
     * getCustomDiagID signature changed.
     * We must link the C++ library statically now.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/445983002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22972 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-08-07 12:56:53 +00:00
mstarzinger@chromium.org
c46cbccefd Make it clear that GCMole depends on Clang 2.9 currently.
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
2013-04-23 12:48:59 +00:00
vegorov@chromium.org
9e87728572 In gcmole assume that methods exiting VM can cause GC.
Detect those methods by reference to StateTag::EXTERNAL in their bodies.

R=fschneider@google.com

Review URL: https://chromiumcodereview.appspot.com/9420046

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10738 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-02-17 11:34:50 +00:00
vegorov@chromium.org
850b106400 Extend GCMole with poor man's data flow analysis to catch dead raw pointer vars.
Fix various places in the code found by improved GCMole.

Review URL: http://codereview.chromium.org/6973063

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7895 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2011-05-16 09:06:16 +00:00
vegorov@chromium.org
8578dfc6ce Add GCMole to the repository.
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
2011-04-07 12:38:16 +00:00