Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: b8d492e6c21d1a9835c3c9bd6f032b1fda9ab2ef
https://github.com/WebKit/WebKit/commit/b8d492e6c21d1a9835c3c9bd6f032b1fda9ab2ef
Author: Yusuke Suzuki <[email protected]>
Date: 2023-11-03 (Fri, 03 Nov 2023)
Changed paths:
M Source/JavaScriptCore/dfg/DFGByteCodeParser.cpp
M Source/JavaScriptCore/dfg/DFGGraph.cpp
M Source/JavaScriptCore/dfg/DFGGraph.h
M Source/JavaScriptCore/dfg/DFGLiveCatchVariablePreservationPhase.cpp
M Source/JavaScriptCore/ftl/FTLCompile.cpp
Log Message:
-----------
[JSC] Allow GC while running B3
https://bugs.webkit.org/show_bug.cgi?id=259641
rdar://113129235
Reviewed by Mark Lam and Justin Michaud.
Occasionally we observed that B3 generation is blocking GC since GC needs to
suspend all compiler threads.
But B3 generation is not relying on GC things. This patch
1. Ensures that Graph::freeze is no longer called after B3 prepareForGeneration
so that we already collected
all GC weak cells before that.
2. Allow B3::generate to run GC while running.
3. Use SegmentedVector for FrozenValue since this is more efficient.
4. Make Bag<> / SegmentedVector<> use modernized, e.g. using alloc()
* Source/JavaScriptCore/dfg/DFGByteCodeParser.cpp:
(JSC::DFG::ByteCodeParser::newVariableAccessData):
(JSC::DFG::ByteCodeParser::InlineStackEntry::InlineStackEntry):
* Source/JavaScriptCore/dfg/DFGGraph.cpp:
(JSC::DFG::Graph::dump):
(JSC::DFG::Graph::registerFrozenValues):
(JSC::DFG::Graph::visitChildrenImpl):
(JSC::DFG::Graph::freeze):
* Source/JavaScriptCore/dfg/DFGGraph.h:
* Source/JavaScriptCore/dfg/DFGLiveCatchVariablePreservationPhase.cpp:
(JSC::DFG::LiveCatchVariablePreservationPhase::newVariableAccessData):
* Source/JavaScriptCore/ftl/FTLCompile.cpp:
(JSC::FTL::compile):
Canonical link: https://commits.webkit.org/270188@main
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