Specialize breakpoint stubs by set of live registers of the stubs they are intercepting.

runtime/vm/assembler_x64.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/heap.h"
@@ skipping 46 matching lines @@
       patchable_pool_entries_.Add(kNotPatchable);
     }
 
     if (StubCode::CallToRuntime_entry() != NULL) {
       FindExternalLabel(&StubCode::CallToRuntimeLabel(), kNotPatchable);
     } else {
       object_pool_.Add(vacant, Heap::kOld);
       patchable_pool_entries_.Add(kNotPatchable);
     }
 
-    // Create fixed object pool entry for debugger stub.
-    if (StubCode::BreakpointRuntime_entry() != NULL) {
+    // Create fixed object pool entries for debugger stubs.
+    if (StubCode::ICCallBreakpoint_entry() != NULL) {
       intptr_t index =
-          FindExternalLabel(&StubCode::BreakpointRuntimeLabel(), kNotPatchable);
-      ASSERT(index == kBreakpointRuntimeCPIndex);
+          FindExternalLabel(&StubCode::ICCallBreakpointLabel(),
+                            kNotPatchable);
+      ASSERT(index == kICCallBreakpointCPIndex);
     } else {
       object_pool_.Add(vacant, Heap::kOld);
       patchable_pool_entries_.Add(kNotPatchable);
+    }
+    if (StubCode::ClosureCallBreakpoint_entry() != NULL) {
+      intptr_t index =
+          FindExternalLabel(&StubCode::ClosureCallBreakpointLabel(),
+                            kNotPatchable);
+      ASSERT(index == kClosureCallBreakpointCPIndex);
+    } else {
+      object_pool_.Add(vacant, Heap::kOld);
+      patchable_pool_entries_.Add(kNotPatchable);
+    }
+    if (StubCode::RuntimeCallBreakpoint_entry() != NULL) {
+      intptr_t index =
+          FindExternalLabel(&StubCode::RuntimeCallBreakpointLabel(),
+                            kNotPatchable);
+      ASSERT(index == kRuntimeCallBreakpointCPIndex);
+    } else {
+      object_pool_.Add(vacant, Heap::kOld);
+      patchable_pool_entries_.Add(kNotPatchable);
     }
   }
 }
 
 
 void Assembler::InitializeMemoryWithBreakpoints(uword data, intptr_t length) {
   memset(reinterpret_cast<void*>(data), Instr::kBreakPointInstruction, length);
 }
 
 
@@ skipping 3319 matching lines @@
 
 
 const char* Assembler::FpuRegisterName(FpuRegister reg) {
   ASSERT((0 <= reg) && (reg < kNumberOfXmmRegisters));
   return xmm_reg_names[reg];
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64