MIPS: Fix 'MIPS: Serializer: serialize internal references via object visitor.'

BUG=

Review URL: https://codereview.chromium.org/1025453003

Cr-Commit-Position: refs/heads/master@{#27351}

src/arm/assembler-arm-inl.h

@@ -554,7 +554,7 @@ void Assembler::deserialization_set_special_target_at(
 
 
 void Assembler::deserialization_set_target_internal_reference_at(
-    Address pc, Address target) {
+    Address pc, Address target, RelocInfo::Mode mode) {
   Memory::Address_at(pc) = target;
 }
 

src/arm/assembler-arm.h

@@ -797,7 +797,8 @@ class Assembler : public AssemblerBase {
 
   // This sets the internal reference at the pc.
   inline static void deserialization_set_target_internal_reference_at(
-      Address pc, Address target);
+      Address pc, Address target,
+      RelocInfo::Mode mode = RelocInfo::INTERNAL_REFERENCE);
 
   // Here we are patching the address in the constant pool, not the actual call
   // instruction.  The address in the constant pool is the same size as a

src/arm64/assembler-arm64-inl.h

@@ -660,7 +660,7 @@ void Assembler::deserialization_set_special_target_at(
 
 
 void Assembler::deserialization_set_target_internal_reference_at(
-    Address pc, Address target) {
+    Address pc, Address target, RelocInfo::Mode mode) {
   Memory::Address_at(pc) = target;
 }
 

src/arm64/assembler-arm64.h

@@ -904,7 +904,8 @@ class Assembler : public AssemblerBase {
 
   // This sets the internal reference at the pc.
   inline static void deserialization_set_target_internal_reference_at(
-      Address pc, Address target);
+      Address pc, Address target,
+      RelocInfo::Mode mode = RelocInfo::INTERNAL_REFERENCE);
 
   // All addresses in the constant pool are the same size as pointers.
   static const int kSpecialTargetSize = kPointerSize;

src/ia32/assembler-ia32-inl.h

@@ -532,7 +532,7 @@ void Assembler::emit_near_disp(Label* L) {
 
 
 void Assembler::deserialization_set_target_internal_reference_at(
-    Address pc, Address target) {
+    Address pc, Address target, RelocInfo::Mode mode) {
   Memory::Address_at(pc) = target;
 }
 

src/ia32/assembler-ia32.h

@@ -549,7 +549,8 @@ class Assembler : public AssemblerBase {
 
   // This sets the internal reference at the pc.
   inline static void deserialization_set_target_internal_reference_at(
-      Address pc, Address target);
+      Address pc, Address target,
+      RelocInfo::Mode mode = RelocInfo::INTERNAL_REFERENCE);
 
   static const int kSpecialTargetSize = kPointerSize;
 

src/mips/assembler-mips-inl.h

@@ -200,9 +200,8 @@ Address Assembler::break_address_from_return_address(Address pc) {
 }
 
 
-void Assembler::deserialization_set_target_internal_reference_at(
-    Address pc, Address target) {
-  if (IsLui(instr_at(pc))) {
+void Assembler::set_target_internal_reference_encoded_at(Address pc,
+                                                         Address target) {
   // Encoded internal references are lui/ori load of 32-bit abolute address.
   Instr instr_lui = Assembler::instr_at(pc + 0 * Assembler::kInstrSize);
   Instr instr_ori = Assembler::instr_at(pc + 1 * Assembler::kInstrSize);
@@ -216,7 +215,19 @@ void Assembler::deserialization_set_target_internal_reference_at(
                           instr_lui | ((imm >> kLuiShift) & kImm16Mask));
   Assembler::instr_at_put(pc + 1 * Assembler::kInstrSize,
                           instr_ori | (imm & kImm16Mask));
+
+  // Currently used only by deserializer, and all code will be flushed
+  // after complete deserialization, no need to flush on each reference.
+}
+
+
+void Assembler::deserialization_set_target_internal_reference_at(
+    Address pc, Address target, RelocInfo::Mode mode) {
+  if (mode == RelocInfo::INTERNAL_REFERENCE_ENCODED) {
+    DCHECK(IsLui(instr_at(pc)));
+    set_target_internal_reference_encoded_at(pc, target);
   } else {
+    DCHECK(mode == RelocInfo::INTERNAL_REFERENCE);
     Memory::Address_at(pc) = target;
   }
 }
@@ -397,19 +408,7 @@ void RelocInfo::WipeOut() {
   if (IsInternalReference(rmode_)) {
     Memory::Address_at(pc_) = NULL;
   } else if (IsInternalReferenceEncoded(rmode_)) {
-    Instr instr_lui = Assembler::instr_at(pc_ + 0 * Assembler::kInstrSize);
-    Instr instr_ori = Assembler::instr_at(pc_ + 1 * Assembler::kInstrSize);
-    DCHECK(Assembler::IsLui(instr_lui));
-    DCHECK(Assembler::IsOri(instr_ori));
-    instr_lui &= ~kImm16Mask;
-    instr_ori &= ~kImm16Mask;
-    int32_t imm = 0;
-    Assembler::instr_at_put(pc_ + 0 * Assembler::kInstrSize,
-                            instr_lui | ((imm >> kLuiShift) & kImm16Mask));
-    Assembler::instr_at_put(pc_ + 1 * Assembler::kInstrSize,
-                            instr_ori | (imm & kImm16Mask));
-    // Currently used only by deserializer, and all code will be flushed
-    // after complete deserialization, no need to flush on each reference.
+    Assembler::set_target_internal_reference_encoded_at(pc_, nullptr);
   } else {
     Assembler::set_target_address_at(pc_, host_, NULL);
   }

src/mips/assembler-mips.h

@@ -549,7 +549,8 @@ class Assembler : public AssemblerBase {
 
   // This sets the internal reference at the pc.
   inline static void deserialization_set_target_internal_reference_at(
-      Address pc, Address target);
+      Address pc, Address target,
+      RelocInfo::Mode mode = RelocInfo::INTERNAL_REFERENCE);
 
   // Size of an instruction.
   static const int kInstrSize = sizeof(Instr);
@@ -1191,6 +1192,9 @@ class Assembler : public AssemblerBase {
   }
 
  private:
+  inline static void set_target_internal_reference_encoded_at(Address pc,
+                                                              Address target);
+
   // Buffer size and constant pool distance are checked together at regular
   // intervals of kBufferCheckInterval emitted bytes.
   static const int kBufferCheckInterval = 1*KB/2;

src/mips64/assembler-mips64-inl.h

@@ -194,10 +194,9 @@ Address Assembler::break_address_from_return_address(Address pc) {
 }
 
 
-void Assembler::deserialization_set_target_internal_reference_at(
-    Address pc, Address target) {
-  if (IsLui(instr_at(pc))) {
-    // Encoded internal references are lui/ori load of 48-bit abolute address.
+void Assembler::set_target_internal_reference_encoded_at(Address pc,
+                                                         Address target) {
+  // Encoded internal references are lui/ori load of 48-bit absolute address.
   Instr instr_lui = Assembler::instr_at(pc + 0 * Assembler::kInstrSize);
   Instr instr_ori = Assembler::instr_at(pc + 1 * Assembler::kInstrSize);
   Instr instr_ori2 = Assembler::instr_at(pc + 3 * Assembler::kInstrSize);
@@ -217,7 +216,16 @@ void Assembler::deserialization_set_target_internal_reference_at(
                           instr_ori | (imm & kImm16Mask));
   // Currently used only by deserializer, and all code will be flushed
   // after complete deserialization, no need to flush on each reference.
+}
+
+
+void Assembler::deserialization_set_target_internal_reference_at(
+    Address pc, Address target, RelocInfo::Mode mode) {
+  if (mode == RelocInfo::INTERNAL_REFERENCE_ENCODED) {
+    DCHECK(IsLui(instr_at(pc)));
+    set_target_internal_reference_encoded_at(pc, target);
   } else {
+    DCHECK(mode == RelocInfo::INTERNAL_REFERENCE);
     Memory::Address_at(pc) = target;
   }
 }
@@ -262,7 +270,7 @@ Address RelocInfo::target_internal_reference() {
   if (rmode_ == INTERNAL_REFERENCE) {
     return Memory::Address_at(pc_);
   } else {
-    // Encoded internal references are lui/ori load of 48-bit abolute address.
+    // Encoded internal references are lui/ori load of 48-bit absolute address.
     DCHECK(rmode_ == INTERNAL_REFERENCE_ENCODED);
     Instr instr_lui = Assembler::instr_at(pc_ + 0 * Assembler::kInstrSize);
     Instr instr_ori = Assembler::instr_at(pc_ + 1 * Assembler::kInstrSize);
@@ -401,24 +409,7 @@ void RelocInfo::WipeOut() {
   if (IsInternalReference(rmode_)) {
     Memory::Address_at(pc_) = NULL;
   } else if (IsInternalReferenceEncoded(rmode_)) {
-    Instr instr_lui = Assembler::instr_at(pc_ + 0 * Assembler::kInstrSize);
-    Instr instr_ori = Assembler::instr_at(pc_ + 1 * Assembler::kInstrSize);
-    Instr instr_ori2 = Assembler::instr_at(pc_ + 3 * Assembler::kInstrSize);
-    DCHECK(Assembler::IsLui(instr_lui));
-    DCHECK(Assembler::IsOri(instr_ori));
-    DCHECK(Assembler::IsOri(instr_ori2));
-    instr_lui &= ~kImm16Mask;
-    instr_ori &= ~kImm16Mask;
-    instr_ori2 &= ~kImm16Mask;
-    int64_t imm = 0;
-    Assembler::instr_at_put(pc_ + 0 * Assembler::kInstrSize,
-                            instr_lui | ((imm >> 32) & kImm16Mask));
-    Assembler::instr_at_put(pc_ + 1 * Assembler::kInstrSize,
-                            instr_ori | ((imm >> 16) & kImm16Mask));
-    Assembler::instr_at_put(pc_ + 3 * Assembler::kInstrSize,
-                            instr_ori | (imm & kImm16Mask));
-    // Currently used only by deserializer, and all code will be flushed
-    // after complete deserialization, no need to flush on each reference.
+    Assembler::set_target_internal_reference_encoded_at(pc_, nullptr);
   } else {
     Assembler::set_target_address_at(pc_, host_, NULL);
   }

src/mips64/assembler-mips64.h

@@ -542,7 +542,8 @@ class Assembler : public AssemblerBase {
 
   // This sets the internal reference at the pc.
   inline static void deserialization_set_target_internal_reference_at(
-      Address pc, Address target);
+      Address pc, Address target,
+      RelocInfo::Mode mode = RelocInfo::INTERNAL_REFERENCE);
 
   // Size of an instruction.
   static const int kInstrSize = sizeof(Instr);
@@ -1172,6 +1173,9 @@ class Assembler : public AssemblerBase {
   // the relocation info.
   TypeFeedbackId recorded_ast_id_;
 
+  inline static void set_target_internal_reference_encoded_at(Address pc,
+                                                              Address target);
+
   int64_t buffer_space() const { return reloc_info_writer.pos() - pc_; }
 
   // Decode branch instruction at pos and return branch target pos.

src/serialize.cc

@@ -1065,6 +1065,7 @@ void Deserializer::ReadData(Object** current, Object** limit, int source_space,
         break;
       }
 
+      case kInternalReferenceEncoded:
       case kInternalReference: {
         // Internal reference address is not encoded via skip, but by offset
         // from code entry.
@@ -1076,7 +1077,10 @@ void Deserializer::ReadData(Object** current, Object** limit, int source_space,
         DCHECK(0 <= target_offset && target_offset <= code->instruction_size());
         Address pc = code->entry() + pc_offset;
         Address target = code->entry() + target_offset;
-        Assembler::deserialization_set_target_internal_reference_at(pc, target);
+        Assembler::deserialization_set_target_internal_reference_at(
+            pc, target, data == kInternalReference
+                            ? RelocInfo::INTERNAL_REFERENCE
+                            : RelocInfo::INTERNAL_REFERENCE_ENCODED);
         break;
       }
 
@@ -1843,7 +1847,10 @@ void Serializer::ObjectSerializer::VisitInternalReference(RelocInfo* rinfo) {
          pc_offset <= Code::cast(object_)->instruction_size());
   DCHECK(0 <= target_offset &&
          target_offset <= Code::cast(object_)->instruction_size());
-  sink_->Put(kInternalReference, "InternalRef");
+  sink_->Put(rinfo->rmode() == RelocInfo::INTERNAL_REFERENCE
+                 ? kInternalReference
+                 : kInternalReferenceEncoded,
+             "InternalRef");
   sink_->PutInt(static_cast<uintptr_t>(pc_offset), "internal ref address");
   sink_->PutInt(static_cast<uintptr_t>(target_offset), "internal ref value");
 }

src/serialize.h

@@ -329,8 +329,7 @@ class SerializerDeserializer: public ObjectVisitor {
     kAttachedReference = 0x1b,
     // 0x1c        Builtin code referenced by index.
     kBuiltin = 0x1c
-    // 0x1d..0x1e  Misc (including 0x3d..0x3f, 0x5d..0x5f, 0x7d..0x7f)
-    // 0x1f        Unused (including 0x3f, 0x5f, 0x7f).
+    // 0x1d..0x1f  Misc (including 0x3d..0x3f, 0x5d..0x5f, 0x7d..0x7f)
   };
 
   static const int kWhereMask = 0x1f;
@@ -362,6 +361,7 @@ class SerializerDeserializer: public ObjectVisitor {
   static const int kSkip = 0x1d;
   // Internal reference encoded as offsets of pc and target from code entry.
   static const int kInternalReference = 0x1e;
+  static const int kInternalReferenceEncoded = 0x1f;
   // Do nothing, used for padding.
   static const int kNop = 0x3d;
   // Move to next reserved chunk.

src/x64/assembler-x64-inl.h

@@ -266,7 +266,7 @@ void Assembler::set_target_address_at(Address pc,
 
 
 void Assembler::deserialization_set_target_internal_reference_at(
-    Address pc, Address target) {
+    Address pc, Address target, RelocInfo::Mode mode) {
   Memory::Address_at(pc) = target;
 }
 

src/x64/assembler-x64.h

@@ -572,7 +572,8 @@ class Assembler : public AssemblerBase {
 
   // This sets the internal reference at the pc.
   inline static void deserialization_set_target_internal_reference_at(
-      Address instruction, Address target);
+      Address pc, Address target,
+      RelocInfo::Mode mode = RelocInfo::INTERNAL_REFERENCE);
 
   static inline RelocInfo::Mode RelocInfoNone() {
     if (kPointerSize == kInt64Size) {