Changeset 161377 in webkit for trunk/Source/JavaScriptCore/llint/LLIntSlowPaths.cpp

Timestamp:

Jan 6, 2014, 3:04:25 PM (12 years ago)

Author:

[email protected]

Message:

Add write barriers to the LLInt
​https://bugs.webkit.org/show_bug.cgi?id=126527

Reviewed by Filip Pizlo.

This patch takes a similar approach to how write barriers work in the baseline JIT.
We execute the write barrier at the beginning of the opcode so we don't have to
worry about saving and restoring live registers across write barrier slow path calls
to C code.

• llint/LLIntOfflineAsmConfig.h:
• llint/LLIntSlowPaths.cpp:

(JSC::LLInt::llint_write_barrier_slow):

• llint/LLIntSlowPaths.h:
• llint/LowLevelInterpreter.asm:
• llint/LowLevelInterpreter32_64.asm:
• llint/LowLevelInterpreter64.asm:
• offlineasm/arm64.rb:
• offlineasm/instructions.rb:
• offlineasm/x86.rb:

File:

• trunk/Source/JavaScriptCore/llint/LLIntSlowPaths.cpp (modified) (1 diff)

trunk/Source/JavaScriptCore/llint/LLIntSlowPaths.cpp

@@ -1389 +1389 @@
 }
 
+extern "C" void llint_write_barrier_slow(ExecState*, JSCell* cell)
+{
+    Heap::writeBarrier(cell);
+}
+
 } } // namespace JSC::LLInt