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Track when the asm interpreter transitions into C++ interpreter #436

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Track when the asm interpreter transitions into C++ interpreter #436

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b00b2d7
Add interpreter transition event
tekknolagi Apr 17, 2023
b010b3b
Add asm interpreter implementation of LOAD_ATTR_INSTANCE_SLOT_DESCR
tekknolagi Apr 17, 2023
4b916d3
Add asm interpreter implementation of LOAD_ATTR_INSTANCE_TYPE
tekknolagi Apr 17, 2023
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60 changes: 60 additions & 0 deletions runtime/interpreter-gen-x64.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -118,7 +118,15 @@ const word kHandlerSizeShift = 8;
const word kHandlerSize = 1 << kHandlerSizeShift;

const Interpreter::OpcodeHandler kCppHandlers[] = {
#if DCHECK_IS_ON()
#define OP(name, id, handler) \
[](Thread* thread, word arg) { \
EVENT(InterpreterDeopt_##name); \
return Interpreter::handler(thread, arg); \
},
#else
#define OP(name, id, handler) Interpreter::handler,
#endif
FOREACH_BYTECODE(OP)
#undef OP
};
Expand Down Expand Up @@ -1219,6 +1227,58 @@ void emitHandler<LOAD_ATTR_INSTANCE>(EmitEnv* env) {
emitJumpToGenericHandler(env);
}

template <>
void emitHandler<LOAD_ATTR_INSTANCE_SLOT_DESCR>(EmitEnv* env) {
ScratchReg r_base(env);
ScratchReg r_layout_id(env);
ScratchReg r_offset(env);
ScratchReg r_caches(env);
ScratchReg r_result(env);
Label slow_path;
__ popq(r_base);
emitGetLayoutId(env, r_layout_id, r_base);
__ movq(r_caches, Address(env->frame, Frame::kCachesOffset));
emitIcLookupMonomorphic(env, &slow_path, r_offset, r_layout_id, r_caches);

emitConvertFromSmallInt(env, r_offset);
__ movq(r_result, Address(r_base, r_offset, TIMES_1, heapObjectDisp(0)));
__ cmpl(r_result, Immediate(Unbound::object().raw()));
__ jcc(EQUAL, &slow_path, Assembler::kNearJump);
__ pushq(r_result);
emitNextOpcode(env);

__ bind(&slow_path);
__ pushq(r_base);
if (env->in_jit) {
emitJumpToDeopt(env);
return;
}
emitJumpToGenericHandler(env);
}

template <>
void emitHandler<LOAD_ATTR_INSTANCE_TYPE>(EmitEnv* env) {
ScratchReg r_base(env);
ScratchReg r_layout_id(env);
ScratchReg r_cached(env);
ScratchReg r_caches(env);
Label slow_path;
__ popq(r_base);
emitGetLayoutId(env, r_layout_id, r_base);
__ movq(r_caches, Address(env->frame, Frame::kCachesOffset));
emitIcLookupMonomorphic(env, &slow_path, r_cached, r_layout_id, r_caches);
__ pushq(r_cached);
emitNextOpcode(env);

__ bind(&slow_path);
__ pushq(r_base);
if (env->in_jit) {
emitJumpToDeopt(env);
return;
}
emitJumpToGenericHandler(env);
}

template <>
void emitHandler<LOAD_ATTR_INSTANCE_TYPE_BOUND_METHOD>(EmitEnv* env) {
ScratchReg r_base(env);
Expand Down
4 changes: 4 additions & 0 deletions util/probes/asm2cpp.bt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,4 @@
usdt:./build/bin/python:python:InterpreterDeopt_* {
@interpreter_deopt[probe]++;
}