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// Copyright (c) 2020 The Khronos Group Inc.
// Copyright (c) 2020 Valve Corporation
// Copyright (c) 2020 LunarG Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef LIBSPIRV_OPT_INST_DEBUG_PRINTF_PASS_H_
#define LIBSPIRV_OPT_INST_DEBUG_PRINTF_PASS_H_
#include "instrument_pass.h"
namespace spvtools {
namespace opt {
// This class/pass is designed to support the debug printf GPU-assisted layer
// of https://github.com/KhronosGroup/Vulkan-ValidationLayers. Its internal and
// external design may change as the layer evolves.
class InstDebugPrintfPass : public InstrumentPass {
public:
// For test harness only
InstDebugPrintfPass() : InstrumentPass(7, 23, kInstValidationIdDebugPrintf) {}
// For all other interfaces
InstDebugPrintfPass(uint32_t desc_set, uint32_t shader_id)
: InstrumentPass(desc_set, shader_id, kInstValidationIdDebugPrintf) {}
~InstDebugPrintfPass() override = default;
// See optimizer.hpp for pass user documentation.
Status Process() override;
const char* name() const override { return "inst-printf-pass"; }
private:
// Generate instructions for OpDebugPrintf.
//
// If |ref_inst_itr| is an OpDebugPrintf, return in |new_blocks| the result
// of replacing it with buffer write instructions within its block at
// |ref_block_itr|. The instructions write a record to the printf
// output buffer stream including |function_idx, instruction_idx, stage_idx|
// and removes the OpDebugPrintf. The block at |ref_block_itr| can just be
// replaced with the block in |new_blocks|. Besides the buffer writes, this
// block will comprise all instructions preceding and following
// |ref_inst_itr|.
//
// This function is designed to be passed to
// InstrumentPass::InstProcessEntryPointCallTree(), which applies the
// function to each instruction in a module and replaces the instruction
// if warranted.
//
// This instrumentation function utilizes GenDebugStreamWrite() to write its
// error records. The validation-specific part of the error record will
// consist of a uint32 which is the id of the format string plus a sequence
// of uint32s representing the values of the remaining operands of the
// DebugPrintf.
void GenDebugPrintfCode(BasicBlock::iterator ref_inst_itr,
UptrVectorIterator<BasicBlock> ref_block_itr,
uint32_t stage_idx,
std::vector<std::unique_ptr<BasicBlock>>* new_blocks);
// Generate a sequence of uint32 instructions in |builder| (if necessary)
// representing the value of |val_inst|, which must be a buffer pointer, a
// uint64, or a scalar or vector of type uint32, float32 or float16. Append
// the ids of all values to the end of |val_ids|.
void GenOutputValues(Instruction* val_inst, std::vector<uint32_t>* val_ids,
InstructionBuilder* builder);
// Generate instructions to write a record containing the operands of
// |printf_inst| arguments to printf buffer, adding new code to the end of
// the last block in |new_blocks|. Kill OpDebugPrintf instruction.
void GenOutputCode(Instruction* printf_inst, uint32_t stage_idx,
std::vector<std::unique_ptr<BasicBlock>>* new_blocks);
// Initialize state for instrumenting bindless checking
void InitializeInstDebugPrintf();
// Apply GenDebugPrintfCode to every instruction in module.
Pass::Status ProcessImpl();
uint32_t ext_inst_printf_id_;
};
} // namespace opt
} // namespace spvtools
#endif // LIBSPIRV_OPT_INST_DEBUG_PRINTF_PASS_H_
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