AuroraMiddleware/v8
1
0
Fork 0
Code Issues 2 Pull Requests Releases Wiki Activity

[Interpreter] Add ForInPrepare runtime function which returns a ObjectTriple.

Browse Source 
Adds a ForInPrepare Runtime function which returns a triple of
cache_type, cache_array and cache_length.

This requires adding support to CEntryStub to call runtime functions
which return a ObjectTriple - a struct containing three Object*
pointers. Also did some cleanup of the x64 CEntryStub to avoid
replicated code.

Replaces the interpreter's use of the ad-hock InterpreterForInPrepare
Runtime function with ForInPrepare in preparation for fixing deopt in
BytecodeGraphBuilder for ForIn (which will be done in a followup CL).

MIPS port contributed by Balazs Kilvady <balazs.kilvady@imgtec.com>.

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1576093004

Cr-Commit-Position: refs/heads/master@{#33334}
This commit is contained in:
rmcilroy 2016-01-15 06:34:38 -08:00 committed by Commit bot
parent 80a648f557
commit 84f8a506e2
28 changed files with 446 additions and 169 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/arguments.h
View File

@ -285,6 +285,8 @@ static Type __RT_impl_##Name(Arguments args, Isolate* isolate)
#define RUNTIME_FUNCTION(Name) RUNTIME_FUNCTION_RETURNS_TYPE(Object*, Name)
#define RUNTIME_FUNCTION_RETURN_PAIR(Name) \
RUNTIME_FUNCTION_RETURNS_TYPE(ObjectPair, Name)
#define RUNTIME_FUNCTION_RETURN_TRIPLE(Name) \
RUNTIME_FUNCTION_RETURNS_TYPE(ObjectTriple, Name)
} // namespace internal
} // namespace v8

41
src/arm/code-stubs-arm.cc
View File

@ -999,11 +999,9 @@ void CEntryStub::Generate(MacroAssembler* masm) {
// r1: pointer to the first argument (C callee-saved)
// r5: pointer to builtin function (C callee-saved)
// Result returned in r0 or r0+r1 by default.
#if V8_HOST_ARCH_ARM
int frame_alignment = MacroAssembler::ActivationFrameAlignment();
int frame_alignment_mask = frame_alignment - 1;
#if V8_HOST_ARCH_ARM
if (FLAG_debug_code) {
if (frame_alignment > kPointerSize) {
Label alignment_as_expected;
@ -1018,8 +1016,25 @@ void CEntryStub::Generate(MacroAssembler* masm) {
#endif
// Call C built-in.
// r0 = argc, r1 = argv
int result_stack_size;
if (result_size() <= 2) {
// r0 = argc, r1 = argv, r2 = isolate
__ mov(r2, Operand(ExternalReference::isolate_address(isolate())));
result_stack_size = 0;
} else {
DCHECK_EQ(3, result_size());
// Allocate additional space for the result.
result_stack_size =
((result_size() * kPointerSize) + frame_alignment_mask) &
~frame_alignment_mask;
__ sub(sp, sp, Operand(result_stack_size));
// r0 = hidden result argument, r1 = argc, r2 = argv, r3 = isolate.
__ mov(r3, Operand(ExternalReference::isolate_address(isolate())));
__ mov(r2, Operand(r1));
__ mov(r1, Operand(r0));
__ mov(r0, Operand(sp));
}
// To let the GC traverse the return address of the exit frames, we need to
// know where the return address is. The CEntryStub is unmovable, so
@ -1032,11 +1047,19 @@ void CEntryStub::Generate(MacroAssembler* masm) {
// Prevent literal pool emission before return address.
Assembler::BlockConstPoolScope block_const_pool(masm);
__ add(lr, pc, Operand(4));
__ str(lr, MemOperand(sp, 0));
__ str(lr, MemOperand(sp, result_stack_size));
__ Call(r5);
}
if (result_size() > 2) {
DCHECK_EQ(3, result_size());
// Read result values stored on stack.
__ ldr(r2, MemOperand(r0, 2 * kPointerSize));
__ ldr(r1, MemOperand(r0, 1 * kPointerSize));
__ ldr(r0, MemOperand(r0, 0 * kPointerSize));
}
// Result returned in r0, r1:r0 or r2:r1:r0 - do not destroy these registers!
__ VFPEnsureFPSCRState(r2);
__ VFPEnsureFPSCRState(r3);
// Check result for exception sentinel.
Label exception_returned;
@ -1049,9 +1072,9 @@ void CEntryStub::Generate(MacroAssembler* masm) {
Label okay;
ExternalReference pending_exception_address(
Isolate::kPendingExceptionAddress, isolate());
__ mov(r2, Operand(pending_exception_address));
__ ldr(r2, MemOperand(r2));
__ CompareRoot(r2, Heap::kTheHoleValueRootIndex);
__ mov(r3, Operand(pending_exception_address));
__ ldr(r3, MemOperand(r3));
__ CompareRoot(r3, Heap::kTheHoleValueRootIndex);
// Cannot use check here as it attempts to generate call into runtime.
__ b(eq, &okay);
__ stop("Unexpected pending exception");

1
src/arm/macro-assembler-arm.h
View File

@ -16,6 +16,7 @@ namespace internal {
// Give alias names to registers for calling conventions.
const Register kReturnRegister0 = {Register::kCode_r0};
const Register kReturnRegister1 = {Register::kCode_r1};
const Register kReturnRegister2 = {Register::kCode_r2};
const Register kJSFunctionRegister = {Register::kCode_r1};
const Register kContextRegister = {Register::kCode_r7};
const Register kInterpreterAccumulatorRegister = {Register::kCode_r0};

31
src/arm/simulator-arm.cc
View File

@ -14,6 +14,7 @@
#include "src/base/bits.h"
#include "src/codegen.h"
#include "src/disasm.h"
#include "src/runtime/runtime-utils.h"
#if defined(USE_SIMULATOR)
@ -1717,6 +1718,10 @@ typedef int64_t (*SimulatorRuntimeCall)(int32_t arg0,
int32_t arg4,
int32_t arg5);
typedef ObjectTriple (*SimulatorRuntimeTripleCall)(int32_t arg0, int32_t arg1,
int32_t arg2, int32_t arg3,
int32_t arg4);
// These prototypes handle the four types of FP calls.
typedef int64_t (*SimulatorRuntimeCompareCall)(double darg0, double darg1);
typedef double (*SimulatorRuntimeFPFPCall)(double darg0, double darg1);
@ -1900,6 +1905,32 @@ void Simulator::SoftwareInterrupt(Instruction* instr) {
reinterpret_cast<SimulatorRuntimeProfilingGetterCall>(
external);
target(arg0, arg1, Redirection::ReverseRedirection(arg2));
} else if (redirection->type() ==
ExternalReference::BUILTIN_CALL_TRIPLE) {
// builtin call returning ObjectTriple.
SimulatorRuntimeTripleCall target =
reinterpret_cast<SimulatorRuntimeTripleCall>(external);
if (::v8::internal::FLAG_trace_sim || !stack_aligned) {
PrintF(
"Call to host triple returning runtime function %p "
"args %08x, %08x, %08x, %08x, %08x",
FUNCTION_ADDR(target), arg1, arg2, arg3, arg4, arg5);
if (!stack_aligned) {
PrintF(" with unaligned stack %08x\n", get_register(sp));
}
PrintF("\n");
}
CHECK(stack_aligned);
// arg0 is a hidden argument pointing to the return location, so don't
// pass it to the target function.
ObjectTriple result = target(arg1, arg2, arg3, arg4, arg5);
if (::v8::internal::FLAG_trace_sim) {
PrintF("Returned { %p, %p, %p }\n", result.x, result.y, result.z);
}
// Return is passed back in address pointed to by hidden first argument.
ObjectTriple* sim_result = reinterpret_cast<ObjectTriple*>(arg0);
*sim_result = result;
set_register(r0, arg0);
} else {
// builtin call.
DCHECK(redirection->type() == ExternalReference::BUILTIN_CALL);

27
src/arm64/code-stubs-arm64.cc
View File

@ -1104,10 +1104,13 @@ void CEntryStub::Generate(MacroAssembler* masm) {
__ Sub(temp_argv, temp_argv, 1 * kPointerSize);
}
// Enter the exit frame. Reserve three slots to preserve x21-x23 callee-saved
// registers.
// Reserve three slots to preserve x21-x23 callee-saved registers. If the
// result size is too large to be returned in registers then also reserve
// space for the return value.
int extra_stack_space = 3 + (result_size() <= 2 ? 0 : result_size());
// Enter the exit frame.
FrameScope scope(masm, StackFrame::MANUAL);
__ EnterExitFrame(save_doubles(), x10, 3);
__ EnterExitFrame(save_doubles(), x10, extra_stack_space);
DCHECK(csp.Is(__ StackPointer()));
// Poke callee-saved registers into reserved space.
@ -1115,6 +1118,11 @@ void CEntryStub::Generate(MacroAssembler* masm) {
__ Poke(argc, 2 * kPointerSize);
__ Poke(target, 3 * kPointerSize);
if (result_size() > 2) {
// Save the location of the return value into x8 for call.
__ Add(x8, __ StackPointer(), Operand(4 * kPointerSize));
}
// We normally only keep tagged values in callee-saved registers, as they
// could be pushed onto the stack by called stubs and functions, and on the
// stack they can confuse the GC. However, we're only calling C functions
@ -1184,7 +1192,18 @@ void CEntryStub::Generate(MacroAssembler* masm) {
__ Blr(target);
__ Bind(&return_location);
// x0 result The return code from the call.
if (result_size() > 2) {
DCHECK_EQ(3, result_size());
// Read result values stored on stack.
__ Ldr(x0, MemOperand(__ StackPointer(), 4 * kPointerSize));
__ Ldr(x1, MemOperand(__ StackPointer(), 5 * kPointerSize));
__ Ldr(x2, MemOperand(__ StackPointer(), 6 * kPointerSize));
}
// Result returned in x0, x1:x0 or x2:x1:x0 - do not destroy these registers!
// x0 result0 The return code from the call.
// x1 result1 For calls which return ObjectPair or ObjectTriple.
// x2 result2 For calls which return ObjectTriple.
// x21 argv
// x22 argc
// x23 target

1
src/arm64/macro-assembler-arm64.h
View File

@ -37,6 +37,7 @@ namespace internal {
// TODO(titzer): arm64 is a pain for aliasing; get rid of these macros
#define kReturnRegister0 x0
#define kReturnRegister1 x1
#define kReturnRegister2 x2
#define kJSFunctionRegister x1
#define kContextRegister cp
#define kInterpreterAccumulatorRegister x0

51
src/arm64/simulator-arm64.cc
View File

@ -15,6 +15,7 @@
#include "src/disasm.h"
#include "src/macro-assembler.h"
#include "src/ostreams.h"
#include "src/runtime/runtime-utils.h"
namespace v8 {
namespace internal {
@ -533,12 +534,6 @@ void Simulator::TearDown(HashMap* i_cache, Redirection* first) {
// uses the ObjectPair structure.
// The simulator assumes all runtime calls return two 64-bits values. If they
// don't, register x1 is clobbered. This is fine because x1 is caller-saved.
struct ObjectPair {
int64_t res0;
int64_t res1;
};
typedef ObjectPair (*SimulatorRuntimeCall)(int64_t arg0,
int64_t arg1,
int64_t arg2,
@ -548,6 +543,11 @@ typedef ObjectPair (*SimulatorRuntimeCall)(int64_t arg0,
int64_t arg6,
int64_t arg7);
typedef ObjectTriple (*SimulatorRuntimeTripleCall)(int64_t arg0, int64_t arg1,
int64_t arg2, int64_t arg3,
int64_t arg4, int64_t arg5,
int64_t arg6, int64_t arg7);
typedef int64_t (*SimulatorRuntimeCompareCall)(double arg1, double arg2);
typedef double (*SimulatorRuntimeFPFPCall)(double arg1, double arg2);
typedef double (*SimulatorRuntimeFPCall)(double arg1);
@ -590,7 +590,8 @@ void Simulator::DoRuntimeCall(Instruction* instr) {
break;
case ExternalReference::BUILTIN_CALL: {
// Object* f(v8::internal::Arguments).
// Object* f(v8::internal::Arguments) or
// ObjectPair f(v8::internal::Arguments).
TraceSim("Type: BUILTIN_CALL\n");
SimulatorRuntimeCall target =
reinterpret_cast<SimulatorRuntimeCall>(external);
@ -607,13 +608,41 @@ void Simulator::DoRuntimeCall(Instruction* instr) {
xreg(4), xreg(5), xreg(6), xreg(7));
ObjectPair result = target(xreg(0), xreg(1), xreg(2), xreg(3),
xreg(4), xreg(5), xreg(6), xreg(7));
TraceSim("Returned: {0x%" PRIx64 ", 0x%" PRIx64 "}\n",
result.res0, result.res1);
TraceSim("Returned: {%p, %p}\n", result.x, result.y);
#ifdef DEBUG
CorruptAllCallerSavedCPURegisters();
#endif
set_xreg(0, result.res0);
set_xreg(1, result.res1);
set_xreg(0, reinterpret_cast<int64_t>(result.x));
set_xreg(1, reinterpret_cast<int64_t>(result.y));
break;
}
case ExternalReference::BUILTIN_CALL_TRIPLE: {
// ObjectTriple f(v8::internal::Arguments).
TraceSim("Type: BUILTIN_CALL TRIPLE\n");
SimulatorRuntimeTripleCall target =
reinterpret_cast<SimulatorRuntimeTripleCall>(external);
// We don't know how many arguments are being passed, but we can
// pass 8 without touching the stack. They will be ignored by the
// host function if they aren't used.
TraceSim(
"Arguments: "
"0x%016" PRIx64 ", 0x%016" PRIx64 ", "
"0x%016" PRIx64 ", 0x%016" PRIx64 ", "
"0x%016" PRIx64 ", 0x%016" PRIx64 ", "
"0x%016" PRIx64 ", 0x%016" PRIx64,
xreg(0), xreg(1), xreg(2), xreg(3), xreg(4), xreg(5), xreg(6),
xreg(7));
// Return location passed in x8.
ObjectTriple* sim_result = reinterpret_cast<ObjectTriple*>(xreg(8));
ObjectTriple result = target(xreg(0), xreg(1), xreg(2), xreg(3), xreg(4),
xreg(5), xreg(6), xreg(7));
TraceSim("Returned: {%p, %p, %p}\n", result.x, result.y, result.z);
#ifdef DEBUG
CorruptAllCallerSavedCPURegisters();
#endif
*sim_result = result;
break;
}

6
src/assembler.cc
View File

@ -1024,12 +1024,14 @@ ExternalReference::ExternalReference(Builtins::Name name, Isolate* isolate)
ExternalReference::ExternalReference(Runtime::FunctionId id, Isolate* isolate)
: address_(Redirect(isolate, Runtime::FunctionForId(id)->entry)) {}
: ExternalReference(Runtime::FunctionForId(id), isolate) {}
ExternalReference::ExternalReference(const Runtime::Function* f,
Isolate* isolate)
: address_(Redirect(isolate, f->entry)) {}
: address_(Redirect(isolate, f->entry, f->result_size == 3
? BUILTIN_CALL_TRIPLE
: BUILTIN_CALL)) {}
ExternalReference ExternalReference::isolate_address(Isolate* isolate) {

7
src/assembler.h
View File

@ -814,9 +814,14 @@ class ExternalReference BASE_EMBEDDED {
// Used in the simulator to support different native api calls.
enum Type {
// Builtin call.
// Object* f(v8::internal::Arguments).
// Object* f(v8::internal::Arguments) or
// ObjectPair f(v8::internal::Arguments).
BUILTIN_CALL, // default
// Builtin call that returns .
// ObjectTriple f(v8::internal::Arguments).
BUILTIN_CALL_TRIPLE,
// Builtin that takes float arguments and returns an int.
// int f(double, double).
BUILTIN_COMPARE_CALL,

6
src/code-stubs.h
View File

@ -1746,10 +1746,8 @@ class CEntryStub : public PlatformCodeStub {
: PlatformCodeStub(isolate) {
minor_key_ = SaveDoublesBits::encode(save_doubles == kSaveFPRegs) |
ArgvMode::encode(argv_mode == kArgvInRegister);
DCHECK(result_size == 1 || result_size == 2);
#if _WIN64 || V8_TARGET_ARCH_PPC
DCHECK(result_size == 1 || result_size == 2 || result_size == 3);
minor_key_ = ResultSizeBits::update(minor_key_, result_size);
#endif // _WIN64
}
// The version of this stub that doesn't save doubles is generated ahead of
@ -1761,9 +1759,7 @@ class CEntryStub : public PlatformCodeStub {
private:
bool save_doubles() const { return SaveDoublesBits::decode(minor_key_); }
bool argv_in_register() const { return ArgvMode::decode(minor_key_); }
#if _WIN64 || V8_TARGET_ARCH_PPC
int result_size() const { return ResultSizeBits::decode(minor_key_); }
#endif // _WIN64
bool NeedsImmovableCode() override;

6
src/compiler/linkage.cc
View File

@ -242,6 +242,9 @@ CallDescriptor* Linkage::GetRuntimeCallDescriptor(
if (locations.return_count_ > 1) {
locations.AddReturn(regloc(kReturnRegister1));
}
if (locations.return_count_ > 2) {
locations.AddReturn(regloc(kReturnRegister2));
}
for (size_t i = 0; i < return_count; i++) {
types.AddReturn(MachineType::AnyTagged());
}
@ -448,6 +451,9 @@ CallDescriptor* Linkage::GetStubCallDescriptor(
if (locations.return_count_ > 1) {
locations.AddReturn(regloc(kReturnRegister1));
}
if (locations.return_count_ > 2) {
locations.AddReturn(regloc(kReturnRegister2));
}
for (size_t i = 0; i < return_count; i++) {
types.AddReturn(return_type);
}

36
src/ia32/code-stubs-ia32.cc
View File

@ -2303,16 +2303,22 @@ void CEntryStub::Generate(MacroAssembler* masm) {
ProfileEntryHookStub::MaybeCallEntryHook(masm);
// Reserve space on the stack for the three arguments passed to the call. If
// result size is greater than can be returned in registers, also reserve
// space for the hidden argument for the result location, and space for the
// result itself.
int arg_stack_space = result_size() < 3 ? 3 : 4 + result_size();
// Enter the exit frame that transitions from JavaScript to C++.
if (argv_in_register()) {
DCHECK(!save_doubles());
__ EnterApiExitFrame(3);
__ EnterApiExitFrame(arg_stack_space);
// Move argc and argv into the correct registers.
__ mov(esi, ecx);
__ mov(edi, eax);
} else {
__ EnterExitFrame(save_doubles());
__ EnterExitFrame(arg_stack_space, save_doubles());
}
// ebx: pointer to C function (C callee-saved)
@ -2327,14 +2333,36 @@ void CEntryStub::Generate(MacroAssembler* masm) {
if (FLAG_debug_code) {
__ CheckStackAlignment();
}
// Call C function.
if (result_size() <= 2) {
__ mov(Operand(esp, 0 * kPointerSize), edi); // argc.
__ mov(Operand(esp, 1 * kPointerSize), esi); // argv.
__ mov(Operand(esp, 2 * kPointerSize),
Immediate(ExternalReference::isolate_address(isolate())));
} else {
DCHECK_EQ(3, result_size());
// Pass a pointer to the result location as the first argument.
__ lea(eax, Operand(esp, 4 * kPointerSize));
__ mov(Operand(esp, 0 * kPointerSize), eax);
__ mov(Operand(esp, 1 * kPointerSize), edi); // argc.
__ mov(Operand(esp, 2 * kPointerSize), esi); // argv.
__ mov(Operand(esp, 3 * kPointerSize),
Immediate(ExternalReference::isolate_address(isolate())));
}
__ call(ebx);
// Result is in eax or edx:eax - do not destroy these registers!
if (result_size() > 2) {
DCHECK_EQ(3, result_size());
#ifndef _WIN32
// Restore the "hidden" argument on the stack which was popped by caller.
__ sub(esp, Immediate(kPointerSize));
#endif
// Read result values stored on stack. Result is stored above the arguments.
__ mov(kReturnRegister0, Operand(esp, 4 * kPointerSize));
__ mov(kReturnRegister1, Operand(esp, 5 * kPointerSize));
__ mov(kReturnRegister2, Operand(esp, 6 * kPointerSize));
}
// Result is in eax, edx:eax or edi:edx:eax - do not destroy these registers!
// Check result for exception sentinel.
Label exception_returned;

4
src/ia32/macro-assembler-ia32.cc
View File

@ -967,7 +967,7 @@ void MacroAssembler::EnterExitFrameEpilogue(int argc, bool save_doubles) {
}
void MacroAssembler::EnterExitFrame(bool save_doubles) {
void MacroAssembler::EnterExitFrame(int argc, bool save_doubles) {
EnterExitFramePrologue();
// Set up argc and argv in callee-saved registers.
@ -976,7 +976,7 @@ void MacroAssembler::EnterExitFrame(bool save_doubles) {
lea(esi, Operand(ebp, eax, times_4, offset));
// Reserve space for argc, argv and isolate.
EnterExitFrameEpilogue(3, save_doubles);
EnterExitFrameEpilogue(argc, save_doubles);
}

3
src/ia32/macro-assembler-ia32.h
View File

@ -16,6 +16,7 @@ namespace internal {
// Give alias names to registers for calling conventions.
const Register kReturnRegister0 = {Register::kCode_eax};
const Register kReturnRegister1 = {Register::kCode_edx};
const Register kReturnRegister2 = {Register::kCode_edi};
const Register kJSFunctionRegister = {Register::kCode_edi};
const Register kContextRegister = {Register::kCode_esi};
const Register kInterpreterAccumulatorRegister = {Register::kCode_eax};
@ -225,7 +226,7 @@ class MacroAssembler: public Assembler {
// arguments in register eax and sets up the number of arguments in
// register edi and the pointer to the first argument in register
// esi.
void EnterExitFrame(bool save_doubles);
void EnterExitFrame(int argc, bool save_doubles);
void EnterApiExitFrame(int argc);

10
src/interpreter/interpreter.cc
View File

@ -1716,14 +1716,16 @@ void Interpreter::DoReturn(compiler::InterpreterAssembler* assembler) {
// |cache_length| represent output parameters.
void Interpreter::DoForInPrepare(compiler::InterpreterAssembler* assembler) {
Node* object = __ GetAccumulator();
Node* result = __ CallRuntime(Runtime::kInterpreterForInPrepare, object);
for (int i = 0; i < 3; i++) {
Node* result_triple = __ CallRuntime(Runtime::kForInPrepare, object);
// Set output registers:
// 0 == cache_type, 1 == cache_array, 2 == cache_length
Node* cache_info = __ LoadFixedArrayElement(result, i);
for (int i = 0; i < 3; i++) {
Node* cache_info = __ Projection(i, result_triple);
Node* cache_info_reg = __ BytecodeOperandReg(i);
__ StoreRegister(cache_info, cache_info_reg);
}
__ SetAccumulator(result);
__ Dispatch();
}

48
src/mips/code-stubs-mips.cc
View File

@ -1092,14 +1092,34 @@ void CEntryStub::Generate(MacroAssembler* masm) {
// a0 = argc
__ mov(s0, a0);
__ mov(s2, a1);
// a1 = argv (set in the delay slot after find_ra below).
// We are calling compiled C/C++ code. a0 and a1 hold our two arguments. We
// also need to reserve the 4 argument slots on the stack.
__ AssertStackIsAligned();
int frame_alignment = MacroAssembler::ActivationFrameAlignment();
int frame_alignment_mask = frame_alignment - 1;
int result_stack_size;
if (result_size() <= 2) {
// a0 = argc, a1 = argv, a2 = isolate
__ li(a2, Operand(ExternalReference::isolate_address(isolate())));
__ mov(a1, s1);
result_stack_size = 0;
} else {
DCHECK_EQ(3, result_size());
// Allocate additional space for the result.
result_stack_size =
((result_size() * kPointerSize) + frame_alignment_mask) &
~frame_alignment_mask;
__ Subu(sp, sp, Operand(result_stack_size));
// a0 = hidden result argument, a1 = argc, a2 = argv, a3 = isolate.
__ li(a3, Operand(ExternalReference::isolate_address(isolate())));
__ mov(a2, s1);
__ mov(a1, a0);
__ mov(a0, sp);
}
// To let the GC traverse the return address of the exit frames, we need to
// know where the return address is. The CEntryStub is unmovable, so
@ -1111,29 +1131,37 @@ void CEntryStub::Generate(MacroAssembler* masm) {
// Use masm-> here instead of the double-underscore macro since extra
// coverage code can interfere with the proper calculation of ra.
Label find_ra;
masm->bal(&find_ra); // bal exposes branch delay slot.
masm->mov(a1, s1);
masm->bind(&find_ra);
__ bal(&find_ra); // bal exposes branch delay slot.
__ nop();
__ bind(&find_ra);
// Adjust the value in ra to point to the correct return location, 2nd
// instruction past the real call into C code (the jalr(t9)), and push it.
// This is the return address of the exit frame.
const int kNumInstructionsToJump = 5;
masm->Addu(ra, ra, kNumInstructionsToJump * kPointerSize);
masm->sw(ra, MemOperand(sp)); // This spot was reserved in EnterExitFrame.
__ Addu(ra, ra, kNumInstructionsToJump * kPointerSize);
// This spot was reserved in EnterExitFrame.
__ sw(ra, MemOperand(sp, result_stack_size));
// Stack space reservation moved to the branch delay slot below.
// Stack is still aligned.
// Call the C routine.
masm->mov(t9, s2); // Function pointer to t9 to conform to ABI for PIC.
masm->jalr(t9);
__ mov(t9, s2); // Function pointer to t9 to conform to ABI for PIC.
__ jalr(t9);
// Set up sp in the delay slot.
masm->addiu(sp, sp, -kCArgsSlotsSize);
__ addiu(sp, sp, -kCArgsSlotsSize);
// Make sure the stored 'ra' points to this position.
DCHECK_EQ(kNumInstructionsToJump,
masm->InstructionsGeneratedSince(&find_ra));
}
if (result_size() > 2) {
DCHECK_EQ(3, result_size());
// Read result values stored on stack.
__ lw(a0, MemOperand(v0, 2 * kPointerSize));
__ lw(v1, MemOperand(v0, 1 * kPointerSize));
__ lw(v0, MemOperand(v0, 0 * kPointerSize));
}
// Result returned in v0, v1:v0 or a0:v1:v0 - do not destroy these registers!
// Check result for exception sentinel.
Label exception_returned;

1
src/mips/macro-assembler-mips.h
View File

@ -15,6 +15,7 @@ namespace internal {
// Give alias names to registers for calling conventions.
const Register kReturnRegister0 = {Register::kCode_v0};
const Register kReturnRegister1 = {Register::kCode_v1};
const Register kReturnRegister2 = {Register::kCode_a0};
const Register kJSFunctionRegister = {Register::kCode_a1};
const Register kContextRegister = {Register::kCpRegister};
const Register kInterpreterAccumulatorRegister = {Register::kCode_v0};

25
src/mips/simulator-mips.cc
View File

@ -16,6 +16,7 @@
#include "src/mips/constants-mips.h"
#include "src/mips/simulator-mips.h"
#include "src/ostreams.h"
#include "src/runtime/runtime-utils.h"
// Only build the simulator if not compiling for real MIPS hardware.
@ -1970,6 +1971,10 @@ typedef int64_t (*SimulatorRuntimeCall)(int32_t arg0,
int32_t arg4,
int32_t arg5);
typedef ObjectTriple (*SimulatorRuntimeTripleCall)(int32_t arg0, int32_t arg1,
int32_t arg2, int32_t arg3,
int32_t arg4);
// These prototypes handle the four types of FP calls.
typedef int64_t (*SimulatorRuntimeCompareCall)(double darg0, double darg1);
typedef double (*SimulatorRuntimeFPFPCall)(double darg0, double darg1);
@ -2181,6 +2186,26 @@ void Simulator::SoftwareInterrupt(Instruction* instr) {
SimulatorRuntimeProfilingGetterCall target =
reinterpret_cast<SimulatorRuntimeProfilingGetterCall>(external);
target(arg0, arg1, Redirection::ReverseRedirection(arg2));
} else if (redirection->type() == ExternalReference::BUILTIN_CALL_TRIPLE) {
// builtin call returning ObjectTriple.
SimulatorRuntimeTripleCall target =
reinterpret_cast<SimulatorRuntimeTripleCall>(external);
if (::v8::internal::FLAG_trace_sim) {
PrintF(
"Call to host triple returning runtime function %p "
"args %08x, %08x, %08x, %08x, %08x\n",
FUNCTION_ADDR(target), arg1, arg2, arg3, arg4, arg5);
}
// arg0 is a hidden argument pointing to the return location, so don't
// pass it to the target function.
ObjectTriple result = target(arg1, arg2, arg3, arg4, arg5);
if (::v8::internal::FLAG_trace_sim) {
PrintF("Returned { %p, %p, %p }\n", result.x, result.y, result.z);
}
// Return is passed back in address pointed to by hidden first argument.
ObjectTriple* sim_result = reinterpret_cast<ObjectTriple*>(arg0);
*sim_result = result;
set_register(v0, arg0);
} else {
SimulatorRuntimeCall target =
reinterpret_cast<SimulatorRuntimeCall>(external);

47
src/mips64/code-stubs-mips64.cc
View File

@ -1090,14 +1090,34 @@ void CEntryStub::Generate(MacroAssembler* masm) {
// a0 = argc
__ mov(s0, a0);
__ mov(s2, a1);
// a1 = argv (set in the delay slot after find_ra below).
// We are calling compiled C/C++ code. a0 and a1 hold our two arguments. We
// also need to reserve the 4 argument slots on the stack.
__ AssertStackIsAligned();
int frame_alignment = MacroAssembler::ActivationFrameAlignment();
int frame_alignment_mask = frame_alignment - 1;
int result_stack_size;
if (result_size() <= 2) {
// a0 = argc, a1 = argv, a2 = isolate
__ li(a2, Operand(ExternalReference::isolate_address(isolate())));
__ mov(a1, s1);
result_stack_size = 0;
} else {
DCHECK_EQ(3, result_size());
// Allocate additional space for the result.
result_stack_size =
((result_size() * kPointerSize) + frame_alignment_mask) &
~frame_alignment_mask;
__ Dsubu(sp, sp, Operand(result_stack_size));
// a0 = hidden result argument, a1 = argc, a2 = argv, a3 = isolate.
__ li(a3, Operand(ExternalReference::isolate_address(isolate())));
__ mov(a2, s1);
__ mov(a1, a0);
__ mov(a0, sp);
}
// To let the GC traverse the return address of the exit frames, we need to
// know where the return address is. The CEntryStub is unmovable, so
@ -1109,28 +1129,37 @@ void CEntryStub::Generate(MacroAssembler* masm) {
// Use masm-> here instead of the double-underscore macro since extra
// coverage code can interfere with the proper calculation of ra.
Label find_ra;
masm->bal(&find_ra); // bal exposes branch delay slot.
masm->mov(a1, s1);
masm->bind(&find_ra);
__ bal(&find_ra); // bal exposes branch delay slot.
__ nop();
__ bind(&find_ra);
// Adjust the value in ra to point to the correct return location, 2nd
// instruction past the real call into C code (the jalr(t9)), and push it.
// This is the return address of the exit frame.
const int kNumInstructionsToJump = 5;
masm->Daddu(ra, ra, kNumInstructionsToJump * kInt32Size);
masm->sd(ra, MemOperand(sp)); // This spot was reserved in EnterExitFrame.
__ Daddu(ra, ra, kNumInstructionsToJump * kInt32Size);
// This spot was reserved in EnterExitFrame.
__ sd(ra, MemOperand(sp, result_stack_size));
// Stack space reservation moved to the branch delay slot below.
// Stack is still aligned.
// Call the C routine.
masm->mov(t9, s2); // Function pointer to t9 to conform to ABI for PIC.
masm->jalr(t9);
__ mov(t9, s2); // Function pointer to t9 to conform to ABI for PIC.
__ jalr(t9);
// Set up sp in the delay slot.
masm->daddiu(sp, sp, -kCArgsSlotsSize);
__ daddiu(sp, sp, -kCArgsSlotsSize);
// Make sure the stored 'ra' points to this position.
DCHECK_EQ(kNumInstructionsToJump,
masm->InstructionsGeneratedSince(&find_ra));
}
if (result_size() > 2) {
DCHECK_EQ(3, result_size());
// Read result values stored on stack.
__ ld(a0, MemOperand(v0, 2 * kPointerSize));
__ ld(v1, MemOperand(v0, 1 * kPointerSize));
__ ld(v0, MemOperand(v0, 0 * kPointerSize));
}
// Result returned in v0, v1:v0 or a0:v1:v0 - do not destroy these registers!
// Check result for exception sentinel.
Label exception_returned;

1
src/mips64/macro-assembler-mips64.h
View File

@ -15,6 +15,7 @@ namespace internal {
// Give alias names to registers for calling conventions.
const Register kReturnRegister0 = {Register::kCode_v0};
const Register kReturnRegister1 = {Register::kCode_v1};
const Register kReturnRegister2 = {Register::kCode_a0};
const Register kJSFunctionRegister = {Register::kCode_a1};
const Register kContextRegister = {Register::kCpRegister};
const Register kInterpreterAccumulatorRegister = {Register::kCode_v0};

30
src/mips64/simulator-mips64.cc
View File

@ -16,6 +16,7 @@
#include "src/mips64/constants-mips64.h"
#include "src/mips64/simulator-mips64.h"
#include "src/ostreams.h"
#include "src/runtime/runtime-utils.h"
// Only build the simulator if not compiling for real MIPS hardware.
#if defined(USE_SIMULATOR)
@ -1964,11 +1965,6 @@ void Simulator::Format(Instruction* instr, const char* format) {
// 64 bits of result. If they don't, the v1 result register contains a bogus
// value, which is fine because it is caller-saved.
struct ObjectPair {
Object* x;
Object* y;
};
typedef ObjectPair (*SimulatorRuntimeCall)(int64_t arg0,
int64_t arg1,
int64_t arg2,
@ -1976,6 +1972,9 @@ typedef ObjectPair (*SimulatorRuntimeCall)(int64_t arg0,
int64_t arg4,
int64_t arg5);
typedef ObjectTriple (*SimulatorRuntimeTripleCall)(int64_t arg0, int64_t arg1,
int64_t arg2, int64_t arg3,
int64_t arg4);
// These prototypes handle the four types of FP calls.
typedef int64_t (*SimulatorRuntimeCompareCall)(double darg0, double darg1);
@ -2175,6 +2174,27 @@ void Simulator::SoftwareInterrupt(Instruction* instr) {
SimulatorRuntimeProfilingGetterCall target =
reinterpret_cast<SimulatorRuntimeProfilingGetterCall>(external);
target(arg0, arg1, Redirection::ReverseRedirection(arg2));
} else if (redirection->type() == ExternalReference::BUILTIN_CALL_TRIPLE) {
// builtin call returning ObjectTriple.
SimulatorRuntimeTripleCall target =
reinterpret_cast<SimulatorRuntimeTripleCall>(external);
if (::v8::internal::FLAG_trace_sim) {
PrintF(
"Call to host triple returning runtime function %p "
"args %016" PRIx64 ", %016" PRIx64 ", %016" PRIx64 ", %016" PRIx64
", %016" PRIx64 "\n",
FUNCTION_ADDR(target), arg1, arg2, arg3, arg4, arg5);
}
// arg0 is a hidden argument pointing to the return location, so don't
// pass it to the target function.
ObjectTriple result = target(arg1, arg2, arg3, arg4, arg5);
if (::v8::internal::FLAG_trace_sim) {
PrintF("Returned { %p, %p, %p }\n", result.x, result.y, result.z);
}
// Return is passed back in address pointed to by hidden first argument.
ObjectTriple* sim_result = reinterpret_cast<ObjectTriple*>(arg0);
*sim_result = result;
set_register(v0, arg0);
} else {
SimulatorRuntimeCall target =
reinterpret_cast<SimulatorRuntimeCall>(external);

46
src/runtime/runtime-forin.cc
View File

@ -5,11 +5,57 @@
#include "src/runtime/runtime-utils.h"
#include "src/arguments.h"
#include "src/factory.h"
#include "src/isolate-inl.h"
#include "src/objects-inl.h"
namespace v8 {
namespace internal {
RUNTIME_FUNCTION_RETURN_TRIPLE(Runtime_ForInPrepare) {
HandleScope scope(isolate);
DCHECK_EQ(1, args.length());
if (!args[0]->IsJSReceiver()) {
return MakeTriple(isolate->ThrowIllegalOperation(), nullptr, nullptr);
}
Handle<JSReceiver> receiver = args.at<JSReceiver>(0);
Object* property_names = Runtime_GetPropertyNamesFast(
1, Handle<Object>::cast(receiver).location(), isolate);
if (isolate->has_pending_exception()) {
return MakeTriple(property_names, nullptr, nullptr);
}
Handle<Object> cache_type(property_names, isolate);
Handle<FixedArray> cache_array;
int cache_length;
Handle<Map> receiver_map = handle(receiver->map(), isolate);
if (cache_type->IsMap()) {
Handle<Map> cache_type_map =
handle(Handle<Map>::cast(cache_type)->map(), isolate);
DCHECK(cache_type_map.is_identical_to(isolate->factory()->meta_map()));
int enum_length = cache_type_map->EnumLength();
DescriptorArray* descriptors = receiver_map->instance_descriptors();
if (enum_length > 0 && descriptors->HasEnumCache()) {
cache_array = handle(descriptors->GetEnumCache(), isolate);
cache_length = cache_array->length();
} else {
cache_array = isolate->factory()->empty_fixed_array();
cache_length = 0;
}
} else {
cache_array = Handle<FixedArray>::cast(cache_type);
cache_length = cache_array->length();
// Cache type of SMI one entails slow check.
cache_type = Handle<Object>(Smi::FromInt(1), isolate);
}
return MakeTriple(*cache_type, *cache_array, Smi::FromInt(cache_length));
}
RUNTIME_FUNCTION(Runtime_ForInDone) {
SealHandleScope scope(isolate);
DCHECK_EQ(2, args.length());

51
src/runtime/runtime-interpreter.cc
View File

@ -147,56 +147,5 @@ RUNTIME_FUNCTION(Runtime_InterpreterNewClosure) {
shared, context, static_cast<PretenureFlag>(pretenured_flag));
}
RUNTIME_FUNCTION(Runtime_InterpreterForInPrepare) {
HandleScope scope(isolate);
DCHECK_EQ(1, args.length());
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, receiver, 0);
Object* property_names = Runtime_GetPropertyNamesFast(
1, Handle<Object>::cast(receiver).location(), isolate);
if (isolate->has_pending_exception()) {
return property_names;
}
Handle<Object> cache_type(property_names, isolate);
Handle<FixedArray> cache_array;
int cache_length;
Handle<Map> receiver_map = handle(receiver->map(), isolate);
if (cache_type->IsMap()) {
Handle<Map> cache_type_map =
handle(Handle<Map>::cast(cache_type)->map(), isolate);
DCHECK(cache_type_map.is_identical_to(isolate->factory()->meta_map()));
int enum_length = cache_type_map->EnumLength();
DescriptorArray* descriptors = receiver_map->instance_descriptors();
if (enum_length > 0 && descriptors->HasEnumCache()) {
cache_array = handle(descriptors->GetEnumCache(), isolate);
cache_length = cache_array->length();
} else {
cache_array = isolate->factory()->empty_fixed_array();
cache_length = 0;
}
} else {
cache_array = Handle<FixedArray>::cast(cache_type);
cache_length = cache_array->length();
STATIC_ASSERT(JS_PROXY_TYPE == FIRST_JS_RECEIVER_TYPE);
if (receiver_map->instance_type() == JS_PROXY_TYPE) {
// Zero indicates proxy
cache_type = Handle<Object>(Smi::FromInt(0), isolate);
} else {
// One entails slow check
cache_type = Handle<Object>(Smi::FromInt(1), isolate);
}
}
Handle<FixedArray> result = isolate->factory()->NewFixedArray(3);
result->set(0, *cache_type);
result->set(1, *cache_array);
result->set(2, Smi::FromInt(cache_length));
return *result;
}
} // namespace internal
} // namespace v8

16
src/runtime/runtime-utils.h
View File

@ -162,6 +162,22 @@ static inline ObjectPair MakePair(Object* x, Object* y) {
}
#endif
// A mechanism to return a triple of Object pointers. In all calling
// conventions, a struct of two pointers is returned in memory,
// allocated by the caller, and passed as a pointer in a hidden first parameter.
struct ObjectTriple {
Object* x;
Object* y;
Object* z;
};
static inline ObjectTriple MakeTriple(Object* x, Object* y, Object* z) {
ObjectTriple result = {x, y, z};
// ObjectTriple is assigned to a hidden first argument.
return result;
}
} // namespace internal
} // namespace v8

6
src/runtime/runtime.cc
View File

@ -27,6 +27,12 @@ FOR_EACH_INTRINSIC_RETURN_OBJECT(F)
FOR_EACH_INTRINSIC_RETURN_PAIR(P)
#undef P
#define T(name, number_of_args, result_size) \
ObjectTriple Runtime_##name(int args_length, Object** args_object, \
Isolate* isolate);
FOR_EACH_INTRINSIC_RETURN_TRIPLE(T)
#undef T
#define F(name, number_of_args, result_size) \
{ \

6
src/runtime/runtime.h
View File

@ -220,8 +220,7 @@ namespace internal {
F(InterpreterToBoolean, 1, 1) \
F(InterpreterLogicalNot, 1, 1) \
F(InterpreterTypeOf, 1, 1) \
F(InterpreterNewClosure, 2, 1) \
F(InterpreterForInPrepare, 1, 1)
F(InterpreterNewClosure, 2, 1)
#define FOR_EACH_INTRINSIC_FUNCTION(F) \
@ -1009,6 +1008,8 @@ namespace internal {
F(LoadLookupSlot, 2, 2) \
F(LoadLookupSlotNoReferenceError, 2, 2)
#define FOR_EACH_INTRINSIC_RETURN_TRIPLE(F) \
F(ForInPrepare, 1, 3)
// Most intrinsics are implemented in the runtime/ directory, but ICs are
// implemented in ic.cc for now.
@ -1075,6 +1076,7 @@ namespace internal {
// FOR_EACH_INTRINSIC defines the list of all intrinsics, coming in 2 flavors,
// either returning an object or a pair.
#define FOR_EACH_INTRINSIC(F) \
FOR_EACH_INTRINSIC_RETURN_TRIPLE(F) \
FOR_EACH_INTRINSIC_RETURN_PAIR(F) \
FOR_EACH_INTRINSIC_RETURN_OBJECT(F)

87
src/x64/code-stubs-x64.cc
View File

@ -2158,12 +2158,34 @@ void CEntryStub::Generate(MacroAssembler* masm) {
ProfileEntryHookStub::MaybeCallEntryHook(masm);
// Enter the exit frame that transitions from JavaScript to C++.
#ifdef _WIN64
int arg_stack_space = (result_size() < 2 ? 2 : 4);
#else // _WIN64
int arg_stack_space = 0;
// Windows 64-bit ABI passes arguments in rcx, rdx, r8, r9. It requires the
// stack to be aligned to 16 bytes. It only allows a single-word to be
// returned in register rax. Larger return sizes must be written to an address
// passed as a hidden first argument.
const Register kCCallArg0 = rcx;
const Register kCCallArg1 = rdx;
const Register kCCallArg2 = r8;
const Register kCCallArg3 = r9;
const int kArgExtraStackSpace = 2;
const int kMaxRegisterResultSize = 1;
#else
// GCC / Clang passes arguments in rdi, rsi, rdx, rcx, r8, r9. Simple results
// are returned in rax, and a struct of two pointers are returned in rax+rdx.
// Larger return sizes must be written to an address passed as a hidden first
// argument.
const Register kCCallArg0 = rdi;
const Register kCCallArg1 = rsi;
const Register kCCallArg2 = rdx;
const Register kCCallArg3 = rcx;
const int kArgExtraStackSpace = 0;
const int kMaxRegisterResultSize = 2;
#endif // _WIN64
// Enter the exit frame that transitions from JavaScript to C++.
int arg_stack_space =
kArgExtraStackSpace +
(result_size() <= kMaxRegisterResultSize ? 0 : result_size());
if (argv_in_register()) {
DCHECK(!save_doubles());
__ EnterApiExitFrame(arg_stack_space);
@ -2179,56 +2201,41 @@ void CEntryStub::Generate(MacroAssembler* masm) {
// r14: number of arguments including receiver (C callee-saved).
// r15: argv pointer (C callee-saved).
// Simple results returned in rax (both AMD64 and Win64 calling conventions).
// Complex results must be written to address passed as first argument.
// AMD64 calling convention: a struct of two pointers in rax+rdx
// Check stack alignment.
if (FLAG_debug_code) {
__ CheckStackAlignment();
}
// Call C function.
#ifdef _WIN64
// Windows 64-bit ABI passes arguments in rcx, rdx, r8, r9.
// Pass argv and argc as two parameters. The arguments object will
// be created by stubs declared by DECLARE_RUNTIME_FUNCTION().
if (result_size() < 2) {
// Call C function. The arguments object will be created by stubs declared by
// DECLARE_RUNTIME_FUNCTION().
if (result_size() <= kMaxRegisterResultSize) {
// Pass a pointer to the Arguments object as the first argument.
// Return result in single register (rax).
__ movp(rcx, r14); // argc.
__ movp(rdx, r15); // argv.
__ Move(r8, ExternalReference::isolate_address(isolate()));
// Return result in single register (rax), or a register pair (rax, rdx).
__ movp(kCCallArg0, r14); // argc.
__ movp(kCCallArg1, r15); // argv.
__ Move(kCCallArg2, ExternalReference::isolate_address(isolate()));
} else {
DCHECK_EQ(2, result_size());
DCHECK_LE(result_size(), 3);
// Pass a pointer to the result location as the first argument.
__ leap(rcx, StackSpaceOperand(2));
__ leap(kCCallArg0, StackSpaceOperand(kArgExtraStackSpace));
// Pass a pointer to the Arguments object as the second argument.
__ movp(rdx, r14); // argc.
__ movp(r8, r15); // argv.
__ Move(r9, ExternalReference::isolate_address(isolate()));
__ movp(kCCallArg1, r14); // argc.
__ movp(kCCallArg2, r15); // argv.
__ Move(kCCallArg3, ExternalReference::isolate_address(isolate()));
}
#else // _WIN64
// GCC passes arguments in rdi, rsi, rdx, rcx, r8, r9.
__ movp(rdi, r14); // argc.
__ movp(rsi, r15); // argv.
__ Move(rdx, ExternalReference::isolate_address(isolate()));
#endif // _WIN64
__ call(rbx);
// Result is in rax - do not destroy this register!
#ifdef _WIN64
// If return value is on the stack, pop it to registers.
if (result_size() > 1) {
DCHECK_EQ(2, result_size());
if (result_size() > kMaxRegisterResultSize) {
// Read result values stored on stack. Result is stored
// above the four argument mirror slots and the two
// Arguments object slots.
__ movq(rax, Operand(rsp, 6 * kRegisterSize));
__ movq(rdx, Operand(rsp, 7 * kRegisterSize));
// above the the two Arguments object slots on Win64.
DCHECK_LE(result_size(), 3);
__ movq(kReturnRegister0, StackSpaceOperand(kArgExtraStackSpace + 0));
__ movq(kReturnRegister1, StackSpaceOperand(kArgExtraStackSpace + 1));
if (result_size() > 2) {
__ movq(kReturnRegister2, StackSpaceOperand(kArgExtraStackSpace + 2));
}
#endif // _WIN64
}
// Result is in rax, rdx:rax or r8:rdx:rax - do not destroy these registers!
// Check result for exception sentinel.
Label exception_returned;

1
src/x64/macro-assembler-x64.h
View File

@ -18,6 +18,7 @@ namespace internal {
// Give alias names to registers for calling conventions.
const Register kReturnRegister0 = {Register::kCode_rax};
const Register kReturnRegister1 = {Register::kCode_rdx};
const Register kReturnRegister2 = {Register::kCode_r8};
const Register kJSFunctionRegister = {Register::kCode_rdi};
const Register kContextRegister = {Register::kCode_rsi};
const Register kInterpreterAccumulatorRegister = {Register::kCode_rax};