[v12.x] deps: V8: backport 07ee86a5a28b

common.gypi

@@ -38,7 +38,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.33',
+    'v8_embedder_string': '-node.34',
 
     ##### V8 defaults for Node.js #####
 

deps/v8/src/builtins/builtins-regexp-gen.cc

@@ -603,13 +603,18 @@ TNode<HeapObject> RegExpBuiltinsAssembler::RegExpExecInternal(
 
     TNode<RawPtrT> code_entry = LoadCodeObjectEntry(code);
 
-    TNode<Int32T> result = UncheckedCast<Int32T>(CallCFunction(
-        code_entry, retval_type, std::make_pair(arg0_type, arg0),
-        std::make_pair(arg1_type, arg1), std::make_pair(arg2_type, arg2),
-        std::make_pair(arg3_type, arg3), std::make_pair(arg4_type, arg4),
-        std::make_pair(arg5_type, arg5), std::make_pair(arg6_type, arg6),
-        std::make_pair(arg7_type, arg7), std::make_pair(arg8_type, arg8),
-        std::make_pair(arg9_type, arg9)));
+    // AIX uses function descriptors on CFunction calls. code_entry in this case
+    // may also point to a Regex interpreter entry trampoline which does not
+    // have a function descriptor. This method is ineffective on other platforms
+    // and is equivalent to CallCFunction.
+    TNode<Int32T> result =
+        UncheckedCast<Int32T>(CallCFunctionWithoutFunctionDescriptor(
+            code_entry, retval_type, std::make_pair(arg0_type, arg0),
+            std::make_pair(arg1_type, arg1), std::make_pair(arg2_type, arg2),
+            std::make_pair(arg3_type, arg3), std::make_pair(arg4_type, arg4),
+            std::make_pair(arg5_type, arg5), std::make_pair(arg6_type, arg6),
+            std::make_pair(arg7_type, arg7), std::make_pair(arg8_type, arg8),
+            std::make_pair(arg9_type, arg9)));
 
     // Check the result.
     // We expect exactly one result since we force the called regexp to behave

deps/v8/src/codegen/ppc/assembler-ppc.cc

@@ -1121,20 +1121,6 @@ void Assembler::divdu(Register dst, Register src1, Register src2, OEBit o,
 }
 #endif
 
-// Function descriptor for AIX.
-// Code address skips the function descriptor "header".
-// TOC and static chain are ignored and set to 0.
-void Assembler::function_descriptor() {
-  if (ABI_USES_FUNCTION_DESCRIPTORS) {
-    Label instructions;
-    DCHECK_EQ(pc_offset(), 0);
-    emit_label_addr(&instructions);
-    dp(0);
-    dp(0);
-    bind(&instructions);
-  }
-}
-
 int Assembler::instructions_required_for_mov(Register dst,
                                              const Operand& src) const {
   bool canOptimize =

deps/v8/src/codegen/ppc/assembler-ppc.h

@@ -839,8 +839,6 @@ class Assembler : public AssemblerBase {
   void mtfprwa(DoubleRegister dst, Register src);
 #endif
 
-  void function_descriptor();
-
   // Exception-generating instructions and debugging support
   void stop(Condition cond = al, int32_t code = kDefaultStopCode,
             CRegister cr = cr7);

deps/v8/src/codegen/ppc/constants-ppc.h

@@ -60,6 +60,12 @@ namespace internal {
 // TODO(sigurds): Change this value once we use relative jumps.
 constexpr size_t kMaxPCRelativeCodeRangeInMB = 0;
 
+// Used to encode a boolean value when emitting 32 bit
+// opcodes which will indicate the presence of function descriptors
+constexpr int kHasFunctionDescriptorBitShift = 9;
+constexpr int kHasFunctionDescriptorBitMask = 1
+                                              << kHasFunctionDescriptorBitShift;
+
 // Number of registers
 const int kNumRegisters = 32;
 

deps/v8/src/codegen/ppc/macro-assembler-ppc.cc

@@ -209,6 +209,12 @@ void TurboAssembler::Jump(const ExternalReference& reference) {
   UseScratchRegisterScope temps(this);
   Register scratch = temps.Acquire();
   Move(scratch, reference);
+  if (ABI_USES_FUNCTION_DESCRIPTORS) {
+    // AIX uses a function descriptor. When calling C code be
+    // aware of this descriptor and pick up values from it.
+    LoadP(ToRegister(ABI_TOC_REGISTER), MemOperand(scratch, kPointerSize));
+    LoadP(scratch, MemOperand(scratch, 0));
+  }
   Jump(scratch);
 }
 
@@ -1931,28 +1937,35 @@ void TurboAssembler::MovToFloatParameters(DoubleRegister src1,
 
 void TurboAssembler::CallCFunction(ExternalReference function,
                                    int num_reg_arguments,
-                                   int num_double_arguments) {
+                                   int num_double_arguments,
+                                   bool has_function_descriptor) {
   Move(ip, function);
-  CallCFunctionHelper(ip, num_reg_arguments, num_double_arguments);
+  CallCFunctionHelper(ip, num_reg_arguments, num_double_arguments,
+                      has_function_descriptor);
 }
 
 void TurboAssembler::CallCFunction(Register function, int num_reg_arguments,
-                                   int num_double_arguments) {
-  CallCFunctionHelper(function, num_reg_arguments, num_double_arguments);
+                                   int num_double_arguments,
+                                   bool has_function_descriptor) {
+  CallCFunctionHelper(function, num_reg_arguments, num_double_arguments,
+                      has_function_descriptor);
 }
 
 void TurboAssembler::CallCFunction(ExternalReference function,
-                                   int num_arguments) {
-  CallCFunction(function, num_arguments, 0);
+                                   int num_arguments,
+                                   bool has_function_descriptor) {
+  CallCFunction(function, num_arguments, 0, has_function_descriptor);
 }
 
-void TurboAssembler::CallCFunction(Register function, int num_arguments) {
-  CallCFunction(function, num_arguments, 0);
+void TurboAssembler::CallCFunction(Register function, int num_arguments,
+                                   bool has_function_descriptor) {
+  CallCFunction(function, num_arguments, 0, has_function_descriptor);
 }
 
 void TurboAssembler::CallCFunctionHelper(Register function,
                                          int num_reg_arguments,
-                                         int num_double_arguments) {
+                                         int num_double_arguments,
+                                         bool has_function_descriptor) {
   DCHECK_LE(num_reg_arguments + num_double_arguments, kMaxCParameters);
   DCHECK(has_frame());
 
@@ -1977,7 +1990,7 @@ void TurboAssembler::CallCFunctionHelper(Register function,
   // allow preemption, so the return address in the link register
   // stays correct.
   Register dest = function;
-  if (ABI_USES_FUNCTION_DESCRIPTORS) {
+  if (ABI_USES_FUNCTION_DESCRIPTORS && has_function_descriptor) {
     // AIX/PPC64BE Linux uses a function descriptor. When calling C code be
     // aware of this descriptor and pick up values from it
     LoadP(ToRegister(ABI_TOC_REGISTER), MemOperand(function, kPointerSize));

deps/v8/src/codegen/ppc/macro-assembler-ppc.h

@@ -350,12 +350,16 @@ class V8_EXPORT_PRIVATE TurboAssembler : public TurboAssemblerBase {
   // garbage collection, since that might move the code and invalidate the
   // return address (unless this is somehow accounted for by the called
   // function).
-  void CallCFunction(ExternalReference function, int num_arguments);
-  void CallCFunction(Register function, int num_arguments);
+  void CallCFunction(ExternalReference function, int num_arguments,
+                     bool has_function_descriptor = kHasFunctionDescriptor);
+  void CallCFunction(Register function, int num_arguments,
+                     bool has_function_descriptor = kHasFunctionDescriptor);
   void CallCFunction(ExternalReference function, int num_reg_arguments,
-                     int num_double_arguments);
+                     int num_double_arguments,
+                     bool has_function_descriptor = kHasFunctionDescriptor);
   void CallCFunction(Register function, int num_reg_arguments,
-                     int num_double_arguments);
+                     int num_double_arguments,
+                     bool has_function_descriptor = kHasFunctionDescriptor);
 
   // Call a runtime routine. This expects {centry} to contain a fitting CEntry
   // builtin for the target runtime function and uses an indirect call.
@@ -642,7 +646,8 @@ class V8_EXPORT_PRIVATE TurboAssembler : public TurboAssemblerBase {
   int CalculateStackPassedWords(int num_reg_arguments,
                                 int num_double_arguments);
   void CallCFunctionHelper(Register function, int num_reg_arguments,
-                           int num_double_arguments);
+                           int num_double_arguments,
+                           bool has_function_descriptor);
   void CallRecordWriteStub(Register object, Register address,
                            RememberedSetAction remembered_set_action,
                            SaveFPRegsMode fp_mode, Handle<Code> code_target,

deps/v8/src/common/globals.h

@@ -404,6 +404,7 @@ enum TypeofMode : int { INSIDE_TYPEOF, NOT_INSIDE_TYPEOF };
 // Enums used by CEntry.
 enum SaveFPRegsMode { kDontSaveFPRegs, kSaveFPRegs };
 enum ArgvMode { kArgvOnStack, kArgvInRegister };
+enum FunctionDescriptorMode { kNoFunctionDescriptor, kHasFunctionDescriptor };
 
 // This constant is used as an undefined value when passing source positions.
 constexpr int kNoSourcePosition = -1;

deps/v8/src/compiler/backend/instruction-selector.cc

@@ -2786,10 +2786,17 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
   // Select the appropriate opcode based on the call type.
   InstructionCode opcode = kArchNop;
   switch (call_descriptor->kind()) {
-    case CallDescriptor::kCallAddress:
-      opcode = kArchCallCFunction | MiscField::encode(static_cast<int>(
-                                        call_descriptor->ParameterCount()));
+    case CallDescriptor::kCallAddress: {
+      int misc_field = static_cast<int>(call_descriptor->ParameterCount());
+#if defined(_AIX)
+      // Highest misc_field bit is used on AIX to indicate if a CFunction call
+      // has function descriptor or not.
+      misc_field |= call_descriptor->HasFunctionDescriptor()
+                    << kHasFunctionDescriptorBitShift;
+#endif
+      opcode = kArchCallCFunction | MiscField::encode(misc_field);
       break;
+    }
     case CallDescriptor::kCallCodeObject:
       opcode = kArchCallCodeObject | MiscField::encode(flags);
       break;

deps/v8/src/compiler/backend/instruction.h

@@ -826,7 +826,8 @@ class V8_EXPORT_PRIVATE Instruction final {
                           size_t output_count, InstructionOperand* outputs,
                           size_t input_count, InstructionOperand* inputs,
                           size_t temp_count, InstructionOperand* temps) {
-    DCHECK_LE(0, opcode);
+    // TODO(9872)
+    // DCHECK_LE(0, opcode);
     DCHECK(output_count == 0 || outputs != nullptr);
     DCHECK(input_count == 0 || inputs != nullptr);
     DCHECK(temp_count == 0 || temps != nullptr);

deps/v8/src/compiler/backend/ppc/code-generator-ppc.cc

@@ -1020,10 +1020,19 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
 #endif
       break;
     case kArchCallCFunction: {
-      int const num_parameters = MiscField::decode(instr->opcode());
+      int misc_field = MiscField::decode(instr->opcode());
+      int num_parameters = misc_field;
+      bool has_function_descriptor = false;
       Label start_call;
       bool isWasmCapiFunction =
           linkage()->GetIncomingDescriptor()->IsWasmCapiFunction();
+#if defined(_AIX)
+      // AIX/PPC64BE Linux uses a function descriptor
+      int kNumParametersMask = kHasFunctionDescriptorBitMask - 1;
+      num_parameters = kNumParametersMask & misc_field;
+      has_function_descriptor =
+          (misc_field & kHasFunctionDescriptorBitMask) != 0;
+#endif
       constexpr int offset = 9 * kInstrSize;
       if (isWasmCapiFunction) {
         __ mflr(r0);
@@ -1036,10 +1045,10 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       }
       if (instr->InputAt(0)->IsImmediate()) {
         ExternalReference ref = i.InputExternalReference(0);
-        __ CallCFunction(ref, num_parameters);
+        __ CallCFunction(ref, num_parameters, has_function_descriptor);
       } else {
         Register func = i.InputRegister(0);
-        __ CallCFunction(func, num_parameters);
+        __ CallCFunction(func, num_parameters, has_function_descriptor);
       }
       // TODO(miladfar): In the above block, kScratchReg must be populated with
       // the strictly-correct PC, which is the return address at this spot. The

deps/v8/src/compiler/code-assembler.cc

@@ -1439,6 +1439,13 @@ Node* CodeAssembler::CallCFunction(
   return raw_assembler()->CallCFunction(function, return_type, args);
 }
 
+Node* CodeAssembler::CallCFunctionWithoutFunctionDescriptor(
+    Node* function, MachineType return_type,
+    std::initializer_list<CodeAssembler::CFunctionArg> args) {
+  return raw_assembler()->CallCFunctionWithoutFunctionDescriptor(
+      function, return_type, args);
+}
+
 Node* CodeAssembler::CallCFunctionWithCallerSavedRegisters(
     Node* function, MachineType return_type, SaveFPRegsMode mode,
     std::initializer_list<CodeAssembler::CFunctionArg> args) {

deps/v8/src/compiler/code-assembler.h

@@ -1438,6 +1438,18 @@ class V8_EXPORT_PRIVATE CodeAssembler {
     return CallCFunction(function, return_type, {cargs...});
   }
 
+  // Call to a C function without a function discriptor on AIX.
+  template <class... CArgs>
+  Node* CallCFunctionWithoutFunctionDescriptor(Node* function,
+                                               MachineType return_type,
+                                               CArgs... cargs) {
+    static_assert(v8::internal::conjunction<
+                      std::is_convertible<CArgs, CFunctionArg>...>::value,
+                  "invalid argument types");
+    return CallCFunctionWithoutFunctionDescriptor(function, return_type,
+                                                  {cargs...});
+  }
+
   // Call to a C function, while saving/restoring caller registers.
   template <class... CArgs>
   Node* CallCFunctionWithCallerSavedRegisters(Node* function,
@@ -1486,6 +1498,10 @@ class V8_EXPORT_PRIVATE CodeAssembler {
   Node* CallCFunction(Node* function, MachineType return_type,
                       std::initializer_list<CFunctionArg> args);
 
+  Node* CallCFunctionWithoutFunctionDescriptor(
+      Node* function, MachineType return_type,
+      std::initializer_list<CFunctionArg> args);
+
   Node* CallCFunctionWithCallerSavedRegisters(
       Node* function, MachineType return_type, SaveFPRegsMode mode,
       std::initializer_list<CFunctionArg> args);

deps/v8/src/compiler/linkage.h

@@ -352,9 +352,18 @@ class V8_EXPORT_PRIVATE CallDescriptor final
 
   SaveFPRegsMode get_save_fp_mode() const { return save_fp_mode_; }
 
+  void set_has_function_descriptor(bool has_function_descriptor) {
+    has_function_descriptor_ = has_function_descriptor;
+  }
+
+  bool HasFunctionDescriptor() const { return has_function_descriptor_; }
+
  private:
   friend class Linkage;
   SaveFPRegsMode save_fp_mode_ = kSaveFPRegs;
+  // AIX has a function descriptor which we will set to true by default
+  // for all CFunction Calls.
+  bool has_function_descriptor_ = kHasFunctionDescriptor;
 
   const Kind kind_;
   const MachineType target_type_;

deps/v8/src/compiler/raw-machine-assembler.cc

@@ -706,7 +706,8 @@ namespace {
 Node* CallCFunctionImpl(
     RawMachineAssembler* rasm, Node* function, MachineType return_type,
     std::initializer_list<RawMachineAssembler::CFunctionArg> args,
-    bool caller_saved_regs, SaveFPRegsMode mode) {
+    bool caller_saved_regs, SaveFPRegsMode mode,
+    bool has_function_descriptor = kHasFunctionDescriptor) {
   static constexpr std::size_t kNumCArgs = 10;
 
   MachineSignature::Builder builder(rasm->zone(), 1, args.size());
@@ -720,6 +721,8 @@ Node* CallCFunctionImpl(
 
   if (caller_saved_regs) call_descriptor->set_save_fp_mode(mode);
 
+  call_descriptor->set_has_function_descriptor(has_function_descriptor);
+
   base::SmallVector<Node*, kNumCArgs> nodes(args.size() + 1);
   nodes[0] = function;
   std::transform(
@@ -740,6 +743,13 @@ Node* RawMachineAssembler::CallCFunction(
                            kDontSaveFPRegs);
 }
 
+Node* RawMachineAssembler::CallCFunctionWithoutFunctionDescriptor(
+    Node* function, MachineType return_type,
+    std::initializer_list<RawMachineAssembler::CFunctionArg> args) {
+  return CallCFunctionImpl(this, function, return_type, args, false,
+                           kDontSaveFPRegs, kNoFunctionDescriptor);
+}
+
 Node* RawMachineAssembler::CallCFunctionWithCallerSavedRegisters(
     Node* function, MachineType return_type, SaveFPRegsMode mode,
     std::initializer_list<RawMachineAssembler::CFunctionArg> args) {

deps/v8/src/compiler/raw-machine-assembler.h

@@ -983,6 +983,22 @@ class V8_EXPORT_PRIVATE RawMachineAssembler {
   Node* CallCFunction(Node* function, MachineType return_type,
                       std::initializer_list<CFunctionArg> args);
 
+  // Call to a C function without a function discriptor on AIX.
+  template <class... CArgs>
+  Node* CallCFunctionWithoutFunctionDescriptor(Node* function,
+                                               MachineType return_type,
+                                               CArgs... cargs) {
+    static_assert(v8::internal::conjunction<
+                      std::is_convertible<CArgs, CFunctionArg>...>::value,
+                  "invalid argument types");
+    return CallCFunctionWithoutFunctionDescriptor(function, return_type,
+                                                  {cargs...});
+  }
+
+  Node* CallCFunctionWithoutFunctionDescriptor(
+      Node* function, MachineType return_type,
+      std::initializer_list<CFunctionArg> args);
+
   // Call to a C function, while saving/restoring caller registers.
   template <class... CArgs>
   Node* CallCFunctionWithCallerSavedRegisters(Node* function,

deps/v8/src/execution/simulator.h

@@ -118,8 +118,6 @@ class GeneratedCode {
     return Simulator::current(isolate_)->template Call<Return>(
         reinterpret_cast<Address>(fn_ptr_), args...);
   }
-
-  DISABLE_CFI_ICALL Return CallIrregexp(Args... args) { return Call(args...); }
 #else
 
   DISABLE_CFI_ICALL Return Call(Args... args) {
@@ -138,11 +136,6 @@ class GeneratedCode {
     return fn_ptr_(args...);
 #endif  // V8_OS_AIX
   }
-
-  DISABLE_CFI_ICALL Return CallIrregexp(Args... args) {
-    // When running without a simulator we call the entry directly.
-    return fn_ptr_(args...);
-  }
 #endif  // USE_SIMULATOR
 
  private:

deps/v8/src/regexp/ppc/regexp-macro-assembler-ppc.cc

@@ -109,8 +109,6 @@ RegExpMacroAssemblerPPC::RegExpMacroAssemblerPPC(Isolate* isolate, Zone* zone,
       internal_failure_label_() {
   DCHECK_EQ(0, registers_to_save % 2);
 
-  // Because RegExp code respects C ABI, so needs a FD
-  __ function_descriptor();
 
   __ b(&entry_label_);  // We'll write the entry code later.
   // If the code gets too big or corrupted, an internal exception will be