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Diffstat (limited to 'src/3rdparty/angle/src/compiler/translator/DetectCallDepth.h')
-rw-r--r-- | src/3rdparty/angle/src/compiler/translator/DetectCallDepth.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/compiler/translator/DetectCallDepth.h b/src/3rdparty/angle/src/compiler/translator/DetectCallDepth.h new file mode 100644 index 0000000000..5e7f23d15f --- /dev/null +++ b/src/3rdparty/angle/src/compiler/translator/DetectCallDepth.h @@ -0,0 +1,80 @@ +// +// Copyright (c) 2002-2011 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. +// + +#ifndef COMPILER_DETECT_RECURSION_H_ +#define COMPILER_DETECT_RECURSION_H_ + +#include "GLSLANG/ShaderLang.h" + +#include <limits.h> +#include "compiler/translator/intermediate.h" +#include "compiler/translator/VariableInfo.h" + +class TInfoSink; + +// Traverses intermediate tree to detect function recursion. +class DetectCallDepth : public TIntermTraverser { +public: + enum ErrorCode { + kErrorMissingMain, + kErrorRecursion, + kErrorMaxDepthExceeded, + kErrorNone + }; + + DetectCallDepth(TInfoSink& infoSync, bool limitCallStackDepth, int maxCallStackDepth); + ~DetectCallDepth(); + + virtual bool visitAggregate(Visit, TIntermAggregate*); + + bool checkExceedsMaxDepth(int depth); + + ErrorCode detectCallDepth(); + +private: + class FunctionNode { + public: + static const int kInfiniteCallDepth = INT_MAX; + + FunctionNode(const TString& fname); + + const TString& getName() const; + + // If a function is already in the callee list, this becomes a no-op. + void addCallee(FunctionNode* callee); + + // Returns kInifinityCallDepth if recursive function calls are detected. + int detectCallDepth(DetectCallDepth* detectCallDepth, int depth); + + // Reset state. + void reset(); + + private: + // mangled function name is unique. + TString name; + + // functions that are directly called by this function. + TVector<FunctionNode*> callees; + + Visit visit; + }; + + ErrorCode detectCallDepthForFunction(FunctionNode* func); + FunctionNode* findFunctionByName(const TString& name); + void resetFunctionNodes(); + + TInfoSink& getInfoSink() { return infoSink; } + + TVector<FunctionNode*> functions; + FunctionNode* currentFunction; + TInfoSink& infoSink; + int maxDepth; + + DetectCallDepth(const DetectCallDepth&); + void operator=(const DetectCallDepth&); +}; + +#endif // COMPILER_DETECT_RECURSION_H_ |