Update V8 to r5388 as required by WebKit r66666
Change-Id: Ib3c42e9b7226d22c65c7077c543fe31afe62a318
diff --git a/src/code-stubs.h b/src/code-stubs.h
index e5a222f..c2dd0a7 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -29,6 +29,7 @@
#define V8_CODE_STUBS_H_
#include "globals.h"
+#include "macro-assembler.h"
namespace v8 {
namespace internal {
@@ -80,6 +81,14 @@
CODE_STUB_LIST_ALL_PLATFORMS(V) \
CODE_STUB_LIST_ARM(V)
+// Types of uncatchable exceptions.
+enum UncatchableExceptionType { OUT_OF_MEMORY, TERMINATION };
+
+// Mode to overwrite BinaryExpression values.
+enum OverwriteMode { NO_OVERWRITE, OVERWRITE_LEFT, OVERWRITE_RIGHT };
+enum UnaryOverwriteMode { UNARY_OVERWRITE, UNARY_NO_OVERWRITE };
+
+
// Stub is base classes of all stubs.
class CodeStub BASE_EMBEDDED {
public:
@@ -105,6 +114,12 @@
static int MinorKeyFromKey(uint32_t key) {
return MinorKeyBits::decode(key);
};
+
+ // Gets the major key from a code object that is a code stub or binary op IC.
+ static Major GetMajorKey(Code* code_stub) {
+ return static_cast<Major>(code_stub->major_key());
+ }
+
static const char* MajorName(Major major_key, bool allow_unknown_keys);
virtual ~CodeStub() {}
@@ -172,6 +187,609 @@
friend class BreakPointIterator;
};
+
+// Helper interface to prepare to/restore after making runtime calls.
+class RuntimeCallHelper {
+ public:
+ virtual ~RuntimeCallHelper() {}
+
+ virtual void BeforeCall(MacroAssembler* masm) const = 0;
+
+ virtual void AfterCall(MacroAssembler* masm) const = 0;
+
+ protected:
+ RuntimeCallHelper() {}
+
+ private:
+ DISALLOW_COPY_AND_ASSIGN(RuntimeCallHelper);
+};
+
+} } // namespace v8::internal
+
+#if V8_TARGET_ARCH_IA32
+#include "ia32/code-stubs-ia32.h"
+#elif V8_TARGET_ARCH_X64
+#include "x64/code-stubs-x64.h"
+#elif V8_TARGET_ARCH_ARM
+#include "arm/code-stubs-arm.h"
+#elif V8_TARGET_ARCH_MIPS
+#include "mips/code-stubs-mips.h"
+#else
+#error Unsupported target architecture.
+#endif
+
+namespace v8 {
+namespace internal {
+
+
+// RuntimeCallHelper implementation used in IC stubs: enters/leaves a
+// newly created internal frame before/after the runtime call.
+class ICRuntimeCallHelper : public RuntimeCallHelper {
+ public:
+ ICRuntimeCallHelper() {}
+
+ virtual void BeforeCall(MacroAssembler* masm) const;
+
+ virtual void AfterCall(MacroAssembler* masm) const;
+};
+
+
+// Trivial RuntimeCallHelper implementation.
+class NopRuntimeCallHelper : public RuntimeCallHelper {
+ public:
+ NopRuntimeCallHelper() {}
+
+ virtual void BeforeCall(MacroAssembler* masm) const {}
+
+ virtual void AfterCall(MacroAssembler* masm) const {}
+};
+
+
+class StackCheckStub : public CodeStub {
+ public:
+ StackCheckStub() { }
+
+ void Generate(MacroAssembler* masm);
+
+ private:
+
+ const char* GetName() { return "StackCheckStub"; }
+
+ Major MajorKey() { return StackCheck; }
+ int MinorKey() { return 0; }
+};
+
+
+class FastNewClosureStub : public CodeStub {
+ public:
+ void Generate(MacroAssembler* masm);
+
+ private:
+ const char* GetName() { return "FastNewClosureStub"; }
+ Major MajorKey() { return FastNewClosure; }
+ int MinorKey() { return 0; }
+};
+
+
+class FastNewContextStub : public CodeStub {
+ public:
+ static const int kMaximumSlots = 64;
+
+ explicit FastNewContextStub(int slots) : slots_(slots) {
+ ASSERT(slots_ > 0 && slots <= kMaximumSlots);
+ }
+
+ void Generate(MacroAssembler* masm);
+
+ private:
+ int slots_;
+
+ const char* GetName() { return "FastNewContextStub"; }
+ Major MajorKey() { return FastNewContext; }
+ int MinorKey() { return slots_; }
+};
+
+
+class FastCloneShallowArrayStub : public CodeStub {
+ public:
+ // Maximum length of copied elements array.
+ static const int kMaximumClonedLength = 8;
+
+ enum Mode {
+ CLONE_ELEMENTS,
+ COPY_ON_WRITE_ELEMENTS
+ };
+
+ FastCloneShallowArrayStub(Mode mode, int length)
+ : mode_(mode),
+ length_((mode == COPY_ON_WRITE_ELEMENTS) ? 0 : length) {
+ ASSERT(length_ >= 0);
+ ASSERT(length_ <= kMaximumClonedLength);
+ }
+
+ void Generate(MacroAssembler* masm);
+
+ private:
+ Mode mode_;
+ int length_;
+
+ const char* GetName() { return "FastCloneShallowArrayStub"; }
+ Major MajorKey() { return FastCloneShallowArray; }
+ int MinorKey() {
+ ASSERT(mode_ == 0 || mode_ == 1);
+ return (length_ << 1) | mode_;
+ }
+};
+
+
+class InstanceofStub: public CodeStub {
+ public:
+ InstanceofStub() { }
+
+ void Generate(MacroAssembler* masm);
+
+ private:
+ Major MajorKey() { return Instanceof; }
+ int MinorKey() { return 0; }
+};
+
+
+enum NegativeZeroHandling {
+ kStrictNegativeZero,
+ kIgnoreNegativeZero
+};
+
+
+class GenericUnaryOpStub : public CodeStub {
+ public:
+ GenericUnaryOpStub(Token::Value op,
+ UnaryOverwriteMode overwrite,
+ NegativeZeroHandling negative_zero = kStrictNegativeZero)
+ : op_(op), overwrite_(overwrite), negative_zero_(negative_zero) { }
+
+ private:
+ Token::Value op_;
+ UnaryOverwriteMode overwrite_;
+ NegativeZeroHandling negative_zero_;
+
+ class OverwriteField: public BitField<UnaryOverwriteMode, 0, 1> {};
+ class NegativeZeroField: public BitField<NegativeZeroHandling, 1, 1> {};
+ class OpField: public BitField<Token::Value, 2, kMinorBits - 2> {};
+
+ Major MajorKey() { return GenericUnaryOp; }
+ int MinorKey() {
+ return OpField::encode(op_) |
+ OverwriteField::encode(overwrite_) |
+ NegativeZeroField::encode(negative_zero_);
+ }
+
+ void Generate(MacroAssembler* masm);
+
+ const char* GetName();
+};
+
+
+enum NaNInformation {
+ kBothCouldBeNaN,
+ kCantBothBeNaN
+};
+
+
+class CompareStub: public CodeStub {
+ public:
+ CompareStub(Condition cc,
+ bool strict,
+ NaNInformation nan_info = kBothCouldBeNaN,
+ bool include_number_compare = true,
+ Register lhs = no_reg,
+ Register rhs = no_reg) :
+ cc_(cc),
+ strict_(strict),
+ never_nan_nan_(nan_info == kCantBothBeNaN),
+ include_number_compare_(include_number_compare),
+ lhs_(lhs),
+ rhs_(rhs),
+ name_(NULL) { }
+
+ void Generate(MacroAssembler* masm);
+
+ private:
+ Condition cc_;
+ bool strict_;
+ // Only used for 'equal' comparisons. Tells the stub that we already know
+ // that at least one side of the comparison is not NaN. This allows the
+ // stub to use object identity in the positive case. We ignore it when
+ // generating the minor key for other comparisons to avoid creating more
+ // stubs.
+ bool never_nan_nan_;
+ // Do generate the number comparison code in the stub. Stubs without number
+ // comparison code is used when the number comparison has been inlined, and
+ // the stub will be called if one of the operands is not a number.
+ bool include_number_compare_;
+ // Register holding the left hand side of the comparison if the stub gives
+ // a choice, no_reg otherwise.
+ Register lhs_;
+ // Register holding the right hand side of the comparison if the stub gives
+ // a choice, no_reg otherwise.
+ Register rhs_;
+
+ // Encoding of the minor key CCCCCCCCCCCCRCNS.
+ class StrictField: public BitField<bool, 0, 1> {};
+ class NeverNanNanField: public BitField<bool, 1, 1> {};
+ class IncludeNumberCompareField: public BitField<bool, 2, 1> {};
+ class RegisterField: public BitField<bool, 3, 1> {};
+ class ConditionField: public BitField<int, 4, 12> {};
+
+ Major MajorKey() { return Compare; }
+
+ int MinorKey();
+
+ // Branch to the label if the given object isn't a symbol.
+ void BranchIfNonSymbol(MacroAssembler* masm,
+ Label* label,
+ Register object,
+ Register scratch);
+
+ // Unfortunately you have to run without snapshots to see most of these
+ // names in the profile since most compare stubs end up in the snapshot.
+ char* name_;
+ const char* GetName();
+#ifdef DEBUG
+ void Print() {
+ PrintF("CompareStub (cc %d), (strict %s), "
+ "(never_nan_nan %s), (number_compare %s) ",
+ static_cast<int>(cc_),
+ strict_ ? "true" : "false",
+ never_nan_nan_ ? "true" : "false",
+ include_number_compare_ ? "included" : "not included");
+
+ if (!lhs_.is(no_reg) && !rhs_.is(no_reg)) {
+ PrintF("(lhs r%d), (rhs r%d)\n", lhs_.code(), rhs_.code());
+ } else {
+ PrintF("\n");
+ }
+ }
+#endif
+};
+
+
+class CEntryStub : public CodeStub {
+ public:
+ explicit CEntryStub(int result_size) : result_size_(result_size) { }
+
+ void Generate(MacroAssembler* masm);
+
+ private:
+ void GenerateCore(MacroAssembler* masm,
+ Label* throw_normal_exception,
+ Label* throw_termination_exception,
+ Label* throw_out_of_memory_exception,
+ bool do_gc,
+ bool always_allocate_scope,
+ int alignment_skew = 0);
+ void GenerateThrowTOS(MacroAssembler* masm);
+ void GenerateThrowUncatchable(MacroAssembler* masm,
+ UncatchableExceptionType type);
+
+ // Number of pointers/values returned.
+ const int result_size_;
+
+ Major MajorKey() { return CEntry; }
+ // Minor key must differ if different result_size_ values means different
+ // code is generated.
+ int MinorKey();
+
+ const char* GetName() { return "CEntryStub"; }
+};
+
+
+class ApiGetterEntryStub : public CodeStub {
+ public:
+ ApiGetterEntryStub(Handle<AccessorInfo> info,
+ ApiFunction* fun)
+ : info_(info),
+ fun_(fun) { }
+ void Generate(MacroAssembler* masm);
+ virtual bool has_custom_cache() { return true; }
+ virtual bool GetCustomCache(Code** code_out);
+ virtual void SetCustomCache(Code* value);
+
+ static const int kStackSpace = 5;
+ static const int kArgc = 4;
+ private:
+ Handle<AccessorInfo> info() { return info_; }
+ ApiFunction* fun() { return fun_; }
+ Major MajorKey() { return NoCache; }
+ int MinorKey() { return 0; }
+ const char* GetName() { return "ApiEntryStub"; }
+ // The accessor info associated with the function.
+ Handle<AccessorInfo> info_;
+ // The function to be called.
+ ApiFunction* fun_;
+};
+
+
+class JSEntryStub : public CodeStub {
+ public:
+ JSEntryStub() { }
+
+ void Generate(MacroAssembler* masm) { GenerateBody(masm, false); }
+
+ protected:
+ void GenerateBody(MacroAssembler* masm, bool is_construct);
+
+ private:
+ Major MajorKey() { return JSEntry; }
+ int MinorKey() { return 0; }
+
+ const char* GetName() { return "JSEntryStub"; }
+};
+
+
+class JSConstructEntryStub : public JSEntryStub {
+ public:
+ JSConstructEntryStub() { }
+
+ void Generate(MacroAssembler* masm) { GenerateBody(masm, true); }
+
+ private:
+ int MinorKey() { return 1; }
+
+ const char* GetName() { return "JSConstructEntryStub"; }
+};
+
+
+class ArgumentsAccessStub: public CodeStub {
+ public:
+ enum Type {
+ READ_ELEMENT,
+ NEW_OBJECT
+ };
+
+ explicit ArgumentsAccessStub(Type type) : type_(type) { }
+
+ private:
+ Type type_;
+
+ Major MajorKey() { return ArgumentsAccess; }
+ int MinorKey() { return type_; }
+
+ void Generate(MacroAssembler* masm);
+ void GenerateReadElement(MacroAssembler* masm);
+ void GenerateNewObject(MacroAssembler* masm);
+
+ const char* GetName() { return "ArgumentsAccessStub"; }
+
+#ifdef DEBUG
+ void Print() {
+ PrintF("ArgumentsAccessStub (type %d)\n", type_);
+ }
+#endif
+};
+
+
+class RegExpExecStub: public CodeStub {
+ public:
+ RegExpExecStub() { }
+
+ private:
+ Major MajorKey() { return RegExpExec; }
+ int MinorKey() { return 0; }
+
+ void Generate(MacroAssembler* masm);
+
+ const char* GetName() { return "RegExpExecStub"; }
+
+#ifdef DEBUG
+ void Print() {
+ PrintF("RegExpExecStub\n");
+ }
+#endif
+};
+
+
+class CallFunctionStub: public CodeStub {
+ public:
+ CallFunctionStub(int argc, InLoopFlag in_loop, CallFunctionFlags flags)
+ : argc_(argc), in_loop_(in_loop), flags_(flags) { }
+
+ void Generate(MacroAssembler* masm);
+
+ private:
+ int argc_;
+ InLoopFlag in_loop_;
+ CallFunctionFlags flags_;
+
+#ifdef DEBUG
+ void Print() {
+ PrintF("CallFunctionStub (args %d, in_loop %d, flags %d)\n",
+ argc_,
+ static_cast<int>(in_loop_),
+ static_cast<int>(flags_));
+ }
+#endif
+
+ // Minor key encoding in 32 bits with Bitfield <Type, shift, size>.
+ class InLoopBits: public BitField<InLoopFlag, 0, 1> {};
+ class FlagBits: public BitField<CallFunctionFlags, 1, 1> {};
+ class ArgcBits: public BitField<int, 2, 32 - 2> {};
+
+ Major MajorKey() { return CallFunction; }
+ int MinorKey() {
+ // Encode the parameters in a unique 32 bit value.
+ return InLoopBits::encode(in_loop_)
+ | FlagBits::encode(flags_)
+ | ArgcBits::encode(argc_);
+ }
+
+ InLoopFlag InLoop() { return in_loop_; }
+ bool ReceiverMightBeValue() {
+ return (flags_ & RECEIVER_MIGHT_BE_VALUE) != 0;
+ }
+
+ public:
+ static int ExtractArgcFromMinorKey(int minor_key) {
+ return ArgcBits::decode(minor_key);
+ }
+};
+
+
+enum StringIndexFlags {
+ // Accepts smis or heap numbers.
+ STRING_INDEX_IS_NUMBER,
+
+ // Accepts smis or heap numbers that are valid array indices
+ // (ECMA-262 15.4). Invalid indices are reported as being out of
+ // range.
+ STRING_INDEX_IS_ARRAY_INDEX
+};
+
+
+// Generates code implementing String.prototype.charCodeAt.
+//
+// Only supports the case when the receiver is a string and the index
+// is a number (smi or heap number) that is a valid index into the
+// string. Additional index constraints are specified by the
+// flags. Otherwise, bails out to the provided labels.
+//
+// Register usage: |object| may be changed to another string in a way
+// that doesn't affect charCodeAt/charAt semantics, |index| is
+// preserved, |scratch| and |result| are clobbered.
+class StringCharCodeAtGenerator {
+ public:
+ StringCharCodeAtGenerator(Register object,
+ Register index,
+ Register scratch,
+ Register result,
+ Label* receiver_not_string,
+ Label* index_not_number,
+ Label* index_out_of_range,
+ StringIndexFlags index_flags)
+ : object_(object),
+ index_(index),
+ scratch_(scratch),
+ result_(result),
+ receiver_not_string_(receiver_not_string),
+ index_not_number_(index_not_number),
+ index_out_of_range_(index_out_of_range),
+ index_flags_(index_flags) {
+ ASSERT(!scratch_.is(object_));
+ ASSERT(!scratch_.is(index_));
+ ASSERT(!scratch_.is(result_));
+ ASSERT(!result_.is(object_));
+ ASSERT(!result_.is(index_));
+ }
+
+ // Generates the fast case code. On the fallthrough path |result|
+ // register contains the result.
+ void GenerateFast(MacroAssembler* masm);
+
+ // Generates the slow case code. Must not be naturally
+ // reachable. Expected to be put after a ret instruction (e.g., in
+ // deferred code). Always jumps back to the fast case.
+ void GenerateSlow(MacroAssembler* masm,
+ const RuntimeCallHelper& call_helper);
+
+ private:
+ Register object_;
+ Register index_;
+ Register scratch_;
+ Register result_;
+
+ Label* receiver_not_string_;
+ Label* index_not_number_;
+ Label* index_out_of_range_;
+
+ StringIndexFlags index_flags_;
+
+ Label call_runtime_;
+ Label index_not_smi_;
+ Label got_smi_index_;
+ Label exit_;
+
+ DISALLOW_COPY_AND_ASSIGN(StringCharCodeAtGenerator);
+};
+
+
+// Generates code for creating a one-char string from a char code.
+class StringCharFromCodeGenerator {
+ public:
+ StringCharFromCodeGenerator(Register code,
+ Register result)
+ : code_(code),
+ result_(result) {
+ ASSERT(!code_.is(result_));
+ }
+
+ // Generates the fast case code. On the fallthrough path |result|
+ // register contains the result.
+ void GenerateFast(MacroAssembler* masm);
+
+ // Generates the slow case code. Must not be naturally
+ // reachable. Expected to be put after a ret instruction (e.g., in
+ // deferred code). Always jumps back to the fast case.
+ void GenerateSlow(MacroAssembler* masm,
+ const RuntimeCallHelper& call_helper);
+
+ private:
+ Register code_;
+ Register result_;
+
+ Label slow_case_;
+ Label exit_;
+
+ DISALLOW_COPY_AND_ASSIGN(StringCharFromCodeGenerator);
+};
+
+
+// Generates code implementing String.prototype.charAt.
+//
+// Only supports the case when the receiver is a string and the index
+// is a number (smi or heap number) that is a valid index into the
+// string. Additional index constraints are specified by the
+// flags. Otherwise, bails out to the provided labels.
+//
+// Register usage: |object| may be changed to another string in a way
+// that doesn't affect charCodeAt/charAt semantics, |index| is
+// preserved, |scratch1|, |scratch2|, and |result| are clobbered.
+class StringCharAtGenerator {
+ public:
+ StringCharAtGenerator(Register object,
+ Register index,
+ Register scratch1,
+ Register scratch2,
+ Register result,
+ Label* receiver_not_string,
+ Label* index_not_number,
+ Label* index_out_of_range,
+ StringIndexFlags index_flags)
+ : char_code_at_generator_(object,
+ index,
+ scratch1,
+ scratch2,
+ receiver_not_string,
+ index_not_number,
+ index_out_of_range,
+ index_flags),
+ char_from_code_generator_(scratch2, result) {}
+
+ // Generates the fast case code. On the fallthrough path |result|
+ // register contains the result.
+ void GenerateFast(MacroAssembler* masm);
+
+ // Generates the slow case code. Must not be naturally
+ // reachable. Expected to be put after a ret instruction (e.g., in
+ // deferred code). Always jumps back to the fast case.
+ void GenerateSlow(MacroAssembler* masm,
+ const RuntimeCallHelper& call_helper);
+
+ private:
+ StringCharCodeAtGenerator char_code_at_generator_;
+ StringCharFromCodeGenerator char_from_code_generator_;
+
+ DISALLOW_COPY_AND_ASSIGN(StringCharAtGenerator);
+};
+
} } // namespace v8::internal
#endif // V8_CODE_STUBS_H_