The Tor Browser: gfx/angle/src/compiler/parseConst.cpp@97036ab72558 (annotated)

gfx/angle/src/compiler/parseConst.cpp@97036ab72558 (annotated)

gfx/angle/src/compiler/parseConst.cpp

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 //
 // Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 #include "compiler/ParseHelper.h"
 //
 // Use this class to carry along data from node to node in
 // the traversal
 //
 class TConstTraverser : public TIntermTraverser {
 public:
     TConstTraverser(ConstantUnion* cUnion, bool singleConstParam, TOperator constructType, TInfoSink& sink, TSymbolTable& symTable, TType& t)
         : error(false),
           index(0),
           unionArray(cUnion),
           type(t),
           constructorType(constructType),
           singleConstantParam(singleConstParam),
           infoSink(sink),
           symbolTable(symTable),
           size(0),
           isMatrix(false),
           matrixSize(0) {
     }
     bool error;
 protected:
     void visitSymbol(TIntermSymbol*);
     void visitConstantUnion(TIntermConstantUnion*);
     bool visitBinary(Visit visit, TIntermBinary*);
     bool visitUnary(Visit visit, TIntermUnary*);
     bool visitSelection(Visit visit, TIntermSelection*);
     bool visitAggregate(Visit visit, TIntermAggregate*);
     bool visitLoop(Visit visit, TIntermLoop*);
     bool visitBranch(Visit visit, TIntermBranch*);
     size_t index;
     ConstantUnion *unionArray;
     TType type;
     TOperator constructorType;
     bool singleConstantParam;
     TInfoSink& infoSink;
     TSymbolTable& symbolTable;
     size_t size; // size of the constructor ( 4 for vec4)
     bool isMatrix;
     size_t matrixSize; // dimension of the matrix (nominal size and not the instance size)
 };
 //
 // The rest of the file are the traversal functions.  The last one
 // is the one that starts the traversal.
 //
 // Return true from interior nodes to have the external traversal
 // continue on to children.  If you process children yourself,
 // return false.
 //
 void TConstTraverser::visitSymbol(TIntermSymbol* node)
 {
     infoSink.info.message(EPrefixInternalError, node->getLine(), "Symbol Node found in constant constructor");
     return;
 }
 bool TConstTraverser::visitBinary(Visit visit, TIntermBinary* node)
 {
     TQualifier qualifier = node->getType().getQualifier();
     if (qualifier != EvqConst) {
         TString buf;
         buf.append("'constructor' : assigning non-constant to ");
         buf.append(type.getCompleteString());
         infoSink.info.message(EPrefixError, node->getLine(), buf.c_str());
         error = true;
         return false;
     }
    infoSink.info.message(EPrefixInternalError, node->getLine(), "Binary Node found in constant constructor");
     return false;
 }
 bool TConstTraverser::visitUnary(Visit visit, TIntermUnary* node)
 {
     TString buf;
     buf.append("'constructor' : assigning non-constant to ");
     buf.append(type.getCompleteString());
     infoSink.info.message(EPrefixError, node->getLine(), buf.c_str());
     error = true;
     return false;
 }
 bool TConstTraverser::visitAggregate(Visit visit, TIntermAggregate* node)
 {
     if (!node->isConstructor() && node->getOp() != EOpComma) {
         TString buf;
         buf.append("'constructor' : assigning non-constant to ");
         buf.append(type.getCompleteString());
         infoSink.info.message(EPrefixError, node->getLine(), buf.c_str());
         error = true;
         return false;
     }
     if (node->getSequence().size() == 0) {
         error = true;
         return false;
     }
     bool flag = node->getSequence().size() == 1 && node->getSequence()[0]->getAsTyped()->getAsConstantUnion();
     if (flag)
     {
         singleConstantParam = true;
         constructorType = node->getOp();
         size = node->getType().getObjectSize();
         if (node->getType().isMatrix()) {
             isMatrix = true;
             matrixSize = node->getType().getNominalSize();
         }
     }
     for (TIntermSequence::iterator p = node->getSequence().begin();
                                    p != node->getSequence().end(); p++) {
         if (node->getOp() == EOpComma)
             index = 0;
         (*p)->traverse(this);
     }
     if (flag)
     {
         singleConstantParam = false;
         constructorType = EOpNull;
         size = 0;
         isMatrix = false;
         matrixSize = 0;
     }
     return false;
 }
 bool TConstTraverser::visitSelection(Visit visit, TIntermSelection* node)
 {
     infoSink.info.message(EPrefixInternalError, node->getLine(), "Selection Node found in constant constructor");
     error = true;
     return false;
 }
 void TConstTraverser::visitConstantUnion(TIntermConstantUnion* node)
 {
     if (!node->getUnionArrayPointer())
     {
         // The constant was not initialized, this should already have been logged
         assert(infoSink.info.size() != 0);
         return;
     }
     ConstantUnion* leftUnionArray = unionArray;
     size_t instanceSize = type.getObjectSize();
     if (index >= instanceSize)
         return;
     if (!singleConstantParam) {
         size_t size = node->getType().getObjectSize();
         ConstantUnion *rightUnionArray = node->getUnionArrayPointer();
         for (size_t i = 0; i < size; i++) {
             if (index >= instanceSize)
                 return;
             leftUnionArray[index] = rightUnionArray[i];
             (index)++;
         }
     } else {
         size_t totalSize = index + size;
         ConstantUnion *rightUnionArray = node->getUnionArrayPointer();
         if (!isMatrix) {
             size_t count = 0;
             for (size_t i = index; i < totalSize; i++) {
                 if (i >= instanceSize)
                     return;
                 leftUnionArray[i] = rightUnionArray[count];
                 (index)++;
                 if (node->getType().getObjectSize() > 1)
                     count++;
             }
         } else {  // for matrix constructors
             size_t count = 0;
             size_t element = index;
             for (size_t i = index; i < totalSize; i++) {
                 if (i >= instanceSize)
                     return;
                 if (element - i == 0 || (i - element) % (matrixSize + 1) == 0 )
                     leftUnionArray[i] = rightUnionArray[count];
                 else
                     leftUnionArray[i].setFConst(0.0f);
                 (index)++;
                 if (node->getType().getObjectSize() > 1)
                     count++;
             }
         }
     }
 }
 bool TConstTraverser::visitLoop(Visit visit, TIntermLoop* node)
 {
     infoSink.info.message(EPrefixInternalError, node->getLine(), "Loop Node found in constant constructor");
     error = true;
     return false;
 }
 bool TConstTraverser::visitBranch(Visit visit, TIntermBranch* node)
 {
     infoSink.info.message(EPrefixInternalError, node->getLine(), "Branch Node found in constant constructor");
     error = true;
     return false;
 }
 //
 // This function is the one to call externally to start the traversal.
 // Individual functions can be initialized to 0 to skip processing of that
 // type of node.  It's children will still be processed.
 //
 bool TIntermediate::parseConstTree(const TSourceLoc& line, TIntermNode* root, ConstantUnion* unionArray, TOperator constructorType, TSymbolTable& symbolTable, TType t, bool singleConstantParam)
 {
     if (root == 0)
         return false;
     TConstTraverser it(unionArray, singleConstantParam, constructorType, infoSink, symbolTable, t);
     root->traverse(&it);
     if (it.error)
         return true;
     else
         return false;
 }

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gfx/angle/src/compiler/parseConst.cpp@97036ab72558 (annotated)

gfx/angle/src/compiler/parseConst.cpp