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Diffstat (limited to 'compiler/utils/assembler.h')
| -rw-r--r-- | compiler/utils/assembler.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/compiler/utils/assembler.h b/compiler/utils/assembler.h index 8981776314..b616057e79 100644 --- a/compiler/utils/assembler.h +++ b/compiler/utils/assembler.h @@ -362,6 +362,16 @@ class Assembler : public DeletableArenaObject<kArenaAllocAssembler> { // Size of generated code virtual size_t CodeSize() const { return buffer_.Size(); } virtual const uint8_t* CodeBufferBaseAddress() const { return buffer_.contents(); } + // CodePosition() is a non-const method similar to CodeSize(), which is used to + // record positions within the code buffer for the purpose of signal handling + // (stack overflow checks and implicit null checks may trigger signals and the + // signal handlers expect them right before the recorded positions). + // On most architectures CodePosition() should be equivalent to CodeSize(), but + // the MIPS assembler needs to be aware of this recording, so it doesn't put + // the instructions that can trigger signals into branch delay slots. Handling + // signals from instructions in delay slots is a bit problematic and should be + // avoided. + virtual size_t CodePosition() { return CodeSize(); } // Copy instructions out of assembly buffer into the given region of memory virtual void FinalizeInstructions(const MemoryRegion& region) { |