Add source position recording for variable loads

This provides more precise source to generated code mapping as variable loads can be handled using IC calls.

R=kmillikin@chromium.org

BUG=v8:1527
TEST=test/message/regress/regress-1527

Review URL: http://codereview.chromium.org//7327038

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8610 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/full-codegen-arm.cc

@@ -776,7 +776,7 @@ void FullCodeGenerator::EmitDeclaration(Variable* variable,
       // IDs for bailouts from optimized code.
       ASSERT(prop->obj()->AsVariableProxy() != NULL);
       { AccumulatorValueContext for_object(this);
-        EmitVariableLoad(prop->obj()->AsVariableProxy()->var());
+        EmitVariableLoad(prop->obj()->AsVariableProxy());
       }
 
       __ push(r0);
@@ -1113,7 +1113,7 @@ void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info,
 
 void FullCodeGenerator::VisitVariableProxy(VariableProxy* expr) {
   Comment cmnt(masm_, "[ VariableProxy");
-  EmitVariableLoad(expr->var());
+  EmitVariableLoad(expr);
 }
 
 
@@ -1262,7 +1262,11 @@ void FullCodeGenerator::EmitDynamicLoadFromSlotFastCase(
 }
 
 
-void FullCodeGenerator::EmitVariableLoad(Variable* var) {
+void FullCodeGenerator::EmitVariableLoad(VariableProxy* proxy) {
+  // Record position before possible IC call.
+  SetSourcePosition(proxy->position());
+  Variable* var = proxy->var();
+
   // Three cases: non-this global variables, lookup slots, and all other
   // types of slots.
   Slot* slot = var->AsSlot();
@@ -1593,7 +1597,7 @@ void FullCodeGenerator::VisitAssignment(Assignment* expr) {
     { AccumulatorValueContext context(this);
       switch (assign_type) {
         case VARIABLE:
-          EmitVariableLoad(expr->target()->AsVariableProxy()->var());
+          EmitVariableLoad(expr->target()->AsVariableProxy());
           PrepareForBailout(expr->target(), TOS_REG);
           break;
         case NAMED_PROPERTY:
@@ -3816,7 +3820,7 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
   if (assign_type == VARIABLE) {
     ASSERT(expr->expression()->AsVariableProxy()->var() != NULL);
     AccumulatorValueContext context(this);
-    EmitVariableLoad(expr->expression()->AsVariableProxy()->var());
+    EmitVariableLoad(expr->expression()->AsVariableProxy());
   } else {
     // Reserve space for result of postfix operation.
     if (expr->is_postfix() && !context()->IsEffect()) {

src/full-codegen.h

@@ -444,7 +444,7 @@ class FullCodeGenerator: public AstVisitor {
                                        TypeofState typeof_state,
                                        Label* slow,
                                        Label* done);
-  void EmitVariableLoad(Variable* expr);
+  void EmitVariableLoad(VariableProxy* proxy);
 
   enum ResolveEvalFlag {
     SKIP_CONTEXT_LOOKUP,

src/ia32/full-codegen-ia32.cc

@@ -744,7 +744,7 @@ void FullCodeGenerator::EmitDeclaration(Variable* variable,
       // IDs for bailouts from optimized code.
       ASSERT(prop->obj()->AsVariableProxy() != NULL);
       { AccumulatorValueContext for_object(this);
-        EmitVariableLoad(prop->obj()->AsVariableProxy()->var());
+        EmitVariableLoad(prop->obj()->AsVariableProxy());
       }
 
       __ push(eax);
@@ -1064,7 +1064,7 @@ void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info,
 
 void FullCodeGenerator::VisitVariableProxy(VariableProxy* expr) {
   Comment cmnt(masm_, "[ VariableProxy");
-  EmitVariableLoad(expr->var());
+  EmitVariableLoad(expr);
 }
 
 
@@ -1214,7 +1214,11 @@ void FullCodeGenerator::EmitDynamicLoadFromSlotFastCase(
 }
 
 
-void FullCodeGenerator::EmitVariableLoad(Variable* var) {
+void FullCodeGenerator::EmitVariableLoad(VariableProxy* proxy) {
+  // Record position before possible IC call.
+  SetSourcePosition(proxy->position());
+  Variable* var = proxy->var();
+
   // Three cases: non-this global variables, lookup slots, and all other
   // types of slots.
   Slot* slot = var->AsSlot();
@@ -1540,7 +1544,7 @@ void FullCodeGenerator::VisitAssignment(Assignment* expr) {
     { AccumulatorValueContext context(this);
       switch (assign_type) {
         case VARIABLE:
-          EmitVariableLoad(expr->target()->AsVariableProxy()->var());
+          EmitVariableLoad(expr->target()->AsVariableProxy());
           PrepareForBailout(expr->target(), TOS_REG);
           break;
         case NAMED_PROPERTY:
@@ -1769,7 +1773,7 @@ void FullCodeGenerator::EmitAssignment(Expression* expr, int bailout_ast_id) {
         ASSERT(prop->obj()->AsVariableProxy() != NULL);
         ASSERT(prop->key()->AsLiteral() != NULL);
         { AccumulatorValueContext for_object(this);
-          EmitVariableLoad(prop->obj()->AsVariableProxy()->var());
+          EmitVariableLoad(prop->obj()->AsVariableProxy());
         }
         __ mov(edx, eax);
         __ SafeSet(ecx, Immediate(prop->key()->AsLiteral()->handle()));
@@ -3768,7 +3772,7 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
   if (assign_type == VARIABLE) {
     ASSERT(expr->expression()->AsVariableProxy()->var() != NULL);
     AccumulatorValueContext context(this);
-    EmitVariableLoad(expr->expression()->AsVariableProxy()->var());
+    EmitVariableLoad(expr->expression()->AsVariableProxy());
   } else {
     // Reserve space for result of postfix operation.
     if (expr->is_postfix() && !context()->IsEffect()) {

src/mips/full-codegen-mips.cc

@@ -783,7 +783,7 @@ void FullCodeGenerator::EmitDeclaration(Variable* variable,
       // IDs for bailouts from optimized code.
       ASSERT(prop->obj()->AsVariableProxy() != NULL);
       { AccumulatorValueContext for_object(this);
-        EmitVariableLoad(prop->obj()->AsVariableProxy()->var());
+        EmitVariableLoad(prop->obj()->AsVariableProxy());
       }
 
       __ push(result_register());
@@ -1117,7 +1117,7 @@ void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info,
 
 void FullCodeGenerator::VisitVariableProxy(VariableProxy* expr) {
   Comment cmnt(masm_, "[ VariableProxy");
-  EmitVariableLoad(expr->var());
+  EmitVariableLoad(expr);
 }
 
 
@@ -1262,7 +1262,11 @@ void FullCodeGenerator::EmitDynamicLoadFromSlotFastCase(
 }
 
 
-void FullCodeGenerator::EmitVariableLoad(Variable* var) {
+void FullCodeGenerator::EmitVariableLoad(VariableProxy* proxy) {
+  // Record position before possible IC call.
+  SetSourcePosition(proxy->position());
+  Variable* var = proxy->var();
+
   // Three cases: non-this global variables, lookup slots, and all other
   // types of slots.
   Slot* slot = var->AsSlot();
@@ -1598,7 +1602,7 @@ void FullCodeGenerator::VisitAssignment(Assignment* expr) {
     { AccumulatorValueContext context(this);
       switch (assign_type) {
         case VARIABLE:
-          EmitVariableLoad(expr->target()->AsVariableProxy()->var());
+          EmitVariableLoad(expr->target()->AsVariableProxy());
           PrepareForBailout(expr->target(), TOS_REG);
           break;
         case NAMED_PROPERTY:
@@ -3839,7 +3843,7 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
   if (assign_type == VARIABLE) {
     ASSERT(expr->expression()->AsVariableProxy()->var() != NULL);
     AccumulatorValueContext context(this);
-    EmitVariableLoad(expr->expression()->AsVariableProxy()->var());
+    EmitVariableLoad(expr->expression()->AsVariableProxy());
   } else {
     // Reserve space for result of postfix operation.
     if (expr->is_postfix() && !context()->IsEffect()) {

src/x64/full-codegen-x64.cc

@@ -741,7 +741,7 @@ void FullCodeGenerator::EmitDeclaration(Variable* variable,
       // IDs for bailouts from optimized code.
       ASSERT(prop->obj()->AsVariableProxy() != NULL);
       { AccumulatorValueContext for_object(this);
-        EmitVariableLoad(prop->obj()->AsVariableProxy()->var());
+        EmitVariableLoad(prop->obj()->AsVariableProxy());
       }
       __ push(rax);
       VisitForAccumulatorValue(function);
@@ -1071,7 +1071,7 @@ void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info,
 
 void FullCodeGenerator::VisitVariableProxy(VariableProxy* expr) {
   Comment cmnt(masm_, "[ VariableProxy");
-  EmitVariableLoad(expr->var());
+  EmitVariableLoad(expr);
 }
 
 
@@ -1222,7 +1222,11 @@ void FullCodeGenerator::EmitDynamicLoadFromSlotFastCase(
 }
 
 
-void FullCodeGenerator::EmitVariableLoad(Variable* var) {
+void FullCodeGenerator::EmitVariableLoad(VariableProxy* proxy) {
+  // Record position before possible IC call.
+  SetSourcePosition(proxy->position());
+  Variable* var = proxy->var();
+
   // Three cases: non-this global variables, lookup slots, and all other
   // types of slots.
   Slot* slot = var->AsSlot();
@@ -1548,7 +1552,7 @@ void FullCodeGenerator::VisitAssignment(Assignment* expr) {
     { AccumulatorValueContext context(this);
       switch (assign_type) {
         case VARIABLE:
-          EmitVariableLoad(expr->target()->AsVariableProxy()->var());
+          EmitVariableLoad(expr->target()->AsVariableProxy());
           PrepareForBailout(expr->target(), TOS_REG);
           break;
         case NAMED_PROPERTY:
@@ -3746,7 +3750,7 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
   if (assign_type == VARIABLE) {
     ASSERT(expr->expression()->AsVariableProxy()->var() != NULL);
     AccumulatorValueContext context(this);
-    EmitVariableLoad(expr->expression()->AsVariableProxy()->var());
+    EmitVariableLoad(expr->expression()->AsVariableProxy());
   } else {
     // Reserve space for result of postfix operation.
     if (expr->is_postfix() && !context()->IsEffect()) {

test/cctest/test-api.cc

@@ -12633,9 +12633,10 @@ v8::Handle<Value> AnalyzeStackInNativeCode(const v8::Arguments& args) {
                     stackTrace->GetFrame(0));
     checkStackFrame(origin, "foo", 6, 3, false, false,
                     stackTrace->GetFrame(1));
-    checkStackFrame(NULL, "", 1, 1, false, false,
+    // This is the source string inside the eval which has the call to foo.
+    checkStackFrame(NULL, "", 1, 5, false, false,
                     stackTrace->GetFrame(2));
-    // The last frame is an anonymous function that has the initial call.
+    // The last frame is an anonymous function which has the initial eval call.
     checkStackFrame(origin, "", 8, 7, false, false,
                     stackTrace->GetFrame(3));
 
@@ -12654,9 +12655,10 @@ v8::Handle<Value> AnalyzeStackInNativeCode(const v8::Arguments& args) {
     bool is_eval = false;
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
-    checkStackFrame(NULL, "", 1, 1, is_eval, false,
+    // This is the source string inside the eval which has the call to baz.
+    checkStackFrame(NULL, "", 1, 5, is_eval, false,
                     stackTrace->GetFrame(2));
-    // The last frame is an anonymous function that has the initial call to foo.
+    // The last frame is an anonymous function which has the initial eval call.
     checkStackFrame(origin, "", 10, 1, false, false,
                     stackTrace->GetFrame(3));
 

test/message/regress/regress-1527.js

+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var o1 = {foo: 'bar'};
+var o2 = {
+  1: 'blah',
+  2: o1.foo,
+  3: foo
+}

test/message/regress/regress-1527.out

+# Copyright 2011 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+*%(basename)s:32: ReferenceError: foo is not defined
+  3: foo
+     ^
+ReferenceError: foo is not defined
+    at *%(basename)s:32:6

test/mjsunit/debug-backtrace.js

@@ -195,7 +195,7 @@ function listener(event, exec_state, event_data, data) {
       assertEquals("m", response.lookup(frame.func.ref).inferredName);
       assertFalse(frame.constructCall);
       assertEquals(35, frame.line);
-      assertEquals(2, frame.column);
+      assertEquals(6, frame.column);
       assertEquals(0, frame.arguments.length);
 
       json = '{"seq":0,"type":"request","command":"frame","arguments":{"number":3}}'
@@ -269,4 +269,3 @@ g();
 // Make sure that the debug event listener vas invoked.
 assertFalse(exception, "exception in listener");
 assertTrue(listenerCalled);
-