3fa3e65d3b
support operands with vector types, it now reports that it cannot interpret expressions that use vector types. They get sent to the JIT instead. <rdar://problem/13733651> llvm-svn: 180899
1318 lines
48 KiB
C++
1318 lines
48 KiB
C++
//===-- IRInterpreter.cpp ---------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Core/DataExtractor.h"
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#include "lldb/Core/Error.h"
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#include "lldb/Core/Log.h"
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#include "lldb/Core/Scalar.h"
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#include "lldb/Core/StreamString.h"
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#include "lldb/Expression/IRMemoryMap.h"
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#include "lldb/Expression/IRInterpreter.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/Instructions.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Support/raw_ostream.h"
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#include <map>
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using namespace llvm;
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static std::string
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PrintValue(const Value *value, bool truncate = false)
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{
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std::string s;
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raw_string_ostream rso(s);
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value->print(rso);
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rso.flush();
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if (truncate)
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s.resize(s.length() - 1);
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size_t offset;
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while ((offset = s.find('\n')) != s.npos)
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s.erase(offset, 1);
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while (s[0] == ' ' || s[0] == '\t')
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s.erase(0, 1);
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return s;
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}
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static std::string
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PrintType(const Type *type, bool truncate = false)
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{
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std::string s;
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raw_string_ostream rso(s);
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type->print(rso);
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rso.flush();
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if (truncate)
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s.resize(s.length() - 1);
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return s;
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}
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class InterpreterStackFrame
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{
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public:
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typedef std::map <const Value*, lldb::addr_t> ValueMap;
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ValueMap m_values;
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DataLayout &m_target_data;
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lldb_private::IRMemoryMap &m_memory_map;
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const BasicBlock *m_bb;
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BasicBlock::const_iterator m_ii;
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BasicBlock::const_iterator m_ie;
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lldb::addr_t m_frame_process_address;
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size_t m_frame_size;
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lldb::addr_t m_stack_pointer;
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lldb::ByteOrder m_byte_order;
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size_t m_addr_byte_size;
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InterpreterStackFrame (DataLayout &target_data,
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lldb_private::IRMemoryMap &memory_map,
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lldb::addr_t stack_frame_bottom,
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lldb::addr_t stack_frame_top) :
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m_target_data (target_data),
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m_memory_map (memory_map)
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{
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m_byte_order = (target_data.isLittleEndian() ? lldb::eByteOrderLittle : lldb::eByteOrderBig);
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m_addr_byte_size = (target_data.getPointerSize(0));
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m_frame_process_address = stack_frame_bottom;
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m_frame_size = stack_frame_top - stack_frame_bottom;
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m_stack_pointer = stack_frame_top;
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}
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~InterpreterStackFrame ()
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{
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}
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void Jump (const BasicBlock *bb)
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{
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m_bb = bb;
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m_ii = m_bb->begin();
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m_ie = m_bb->end();
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}
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std::string SummarizeValue (const Value *value)
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{
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lldb_private::StreamString ss;
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ss.Printf("%s", PrintValue(value).c_str());
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ValueMap::iterator i = m_values.find(value);
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if (i != m_values.end())
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{
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lldb::addr_t addr = i->second;
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ss.Printf(" 0x%llx", (unsigned long long)addr);
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}
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return ss.GetString();
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}
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bool AssignToMatchType (lldb_private::Scalar &scalar, uint64_t u64value, Type *type)
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{
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size_t type_size = m_target_data.getTypeStoreSize(type);
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switch (type_size)
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{
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case 1:
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scalar = (uint8_t)u64value;
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break;
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case 2:
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scalar = (uint16_t)u64value;
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break;
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case 4:
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scalar = (uint32_t)u64value;
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break;
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case 8:
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scalar = (uint64_t)u64value;
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break;
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default:
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return false;
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}
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return true;
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}
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bool EvaluateValue (lldb_private::Scalar &scalar, const Value *value, Module &module)
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{
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const Constant *constant = dyn_cast<Constant>(value);
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if (constant)
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{
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if (const ConstantInt *constant_int = dyn_cast<ConstantInt>(constant))
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{
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return AssignToMatchType(scalar, constant_int->getLimitedValue(), value->getType());
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}
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}
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else
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{
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lldb::addr_t process_address = ResolveValue(value, module);
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size_t value_size = m_target_data.getTypeStoreSize(value->getType());
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lldb_private::DataExtractor value_extractor;
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lldb_private::Error extract_error;
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m_memory_map.GetMemoryData(value_extractor, process_address, value_size, extract_error);
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if (!extract_error.Success())
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return false;
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lldb::offset_t offset = 0;
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if (value_size <= 8)
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{
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uint64_t u64value = value_extractor.GetMaxU64(&offset, value_size);
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return AssignToMatchType(scalar, u64value, value->getType());
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}
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}
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return false;
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}
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bool AssignValue (const Value *value, lldb_private::Scalar &scalar, Module &module)
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{
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lldb::addr_t process_address = ResolveValue (value, module);
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if (process_address == LLDB_INVALID_ADDRESS)
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return false;
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lldb_private::Scalar cast_scalar;
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if (!AssignToMatchType(cast_scalar, scalar.GetRawBits64(0), value->getType()))
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return false;
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size_t value_byte_size = m_target_data.getTypeStoreSize(value->getType());
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lldb_private::DataBufferHeap buf(value_byte_size, 0);
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lldb_private::Error get_data_error;
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if (!cast_scalar.GetAsMemoryData(buf.GetBytes(), buf.GetByteSize(), m_byte_order, get_data_error))
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return false;
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lldb_private::Error write_error;
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m_memory_map.WriteMemory(process_address, buf.GetBytes(), buf.GetByteSize(), write_error);
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return write_error.Success();
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}
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bool ResolveConstantValue (APInt &value, const Constant *constant)
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{
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switch (constant->getValueID())
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{
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default:
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break;
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case Value::ConstantIntVal:
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if (const ConstantInt *constant_int = dyn_cast<ConstantInt>(constant))
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{
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value = constant_int->getValue();
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return true;
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}
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break;
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case Value::ConstantFPVal:
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if (const ConstantFP *constant_fp = dyn_cast<ConstantFP>(constant))
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{
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value = constant_fp->getValueAPF().bitcastToAPInt();
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return true;
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}
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break;
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case Value::ConstantExprVal:
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if (const ConstantExpr *constant_expr = dyn_cast<ConstantExpr>(constant))
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{
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switch (constant_expr->getOpcode())
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{
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default:
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return false;
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case Instruction::IntToPtr:
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case Instruction::PtrToInt:
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case Instruction::BitCast:
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return ResolveConstantValue(value, constant_expr->getOperand(0));
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case Instruction::GetElementPtr:
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{
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ConstantExpr::const_op_iterator op_cursor = constant_expr->op_begin();
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ConstantExpr::const_op_iterator op_end = constant_expr->op_end();
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Constant *base = dyn_cast<Constant>(*op_cursor);
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if (!base)
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return false;
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if (!ResolveConstantValue(value, base))
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return false;
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op_cursor++;
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if (op_cursor == op_end)
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return true; // no offset to apply!
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SmallVector <Value *, 8> indices (op_cursor, op_end);
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uint64_t offset = m_target_data.getIndexedOffset(base->getType(), indices);
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const bool is_signed = true;
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value += APInt(value.getBitWidth(), offset, is_signed);
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return true;
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}
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}
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}
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break;
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case Value::ConstantPointerNullVal:
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if (isa<ConstantPointerNull>(constant))
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{
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value = APInt(m_target_data.getPointerSizeInBits(), 0);
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return true;
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}
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break;
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}
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return false;
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}
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bool MakeArgument(const Argument *value, uint64_t address)
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{
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lldb::addr_t data_address = Malloc(value->getType());
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if (data_address == LLDB_INVALID_ADDRESS)
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return false;
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lldb_private::Error write_error;
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m_memory_map.WritePointerToMemory(data_address, address, write_error);
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if (!write_error.Success())
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{
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lldb_private::Error free_error;
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m_memory_map.Free(data_address, free_error);
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return false;
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}
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m_values[value] = data_address;
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lldb_private::Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
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if (log)
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{
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log->Printf("Made an allocation for argument %s", PrintValue(value).c_str());
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log->Printf(" Data region : %llx", (unsigned long long)address);
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log->Printf(" Ref region : %llx", (unsigned long long)data_address);
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}
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return true;
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}
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bool ResolveConstant (lldb::addr_t process_address, const Constant *constant)
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{
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APInt resolved_value;
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if (!ResolveConstantValue(resolved_value, constant))
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return false;
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const uint64_t *raw_data = resolved_value.getRawData();
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size_t constant_size = m_target_data.getTypeStoreSize(constant->getType());
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lldb_private::Error write_error;
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m_memory_map.WriteMemory(process_address, (uint8_t*)raw_data, constant_size, write_error);
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return write_error.Success();
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}
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lldb::addr_t Malloc (size_t size, uint8_t byte_alignment)
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{
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lldb::addr_t ret = m_stack_pointer;
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ret -= size;
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ret -= (ret % byte_alignment);
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if (ret < m_frame_process_address)
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return LLDB_INVALID_ADDRESS;
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m_stack_pointer = ret;
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return ret;
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}
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lldb::addr_t MallocPointer ()
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{
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return Malloc(m_target_data.getPointerSize(), m_target_data.getPointerPrefAlignment());
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}
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lldb::addr_t Malloc (llvm::Type *type)
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{
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lldb_private::Error alloc_error;
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return Malloc(m_target_data.getTypeAllocSize(type), m_target_data.getPrefTypeAlignment(type));
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}
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std::string PrintData (lldb::addr_t addr, llvm::Type *type)
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{
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size_t length = m_target_data.getTypeStoreSize(type);
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lldb_private::DataBufferHeap buf(length, 0);
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lldb_private::Error read_error;
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m_memory_map.ReadMemory(buf.GetBytes(), addr, length, read_error);
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if (!read_error.Success())
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return std::string("<couldn't read data>");
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lldb_private::StreamString ss;
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for (size_t i = 0; i < length; i++)
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{
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if ((!(i & 0xf)) && i)
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ss.Printf("%02hhx - ", buf.GetBytes()[i]);
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else
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ss.Printf("%02hhx ", buf.GetBytes()[i]);
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}
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return ss.GetString();
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}
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lldb::addr_t ResolveValue (const Value *value, Module &module)
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{
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ValueMap::iterator i = m_values.find(value);
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if (i != m_values.end())
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return i->second;
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// Fall back and allocate space [allocation type Alloca]
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lldb::addr_t data_address = Malloc(value->getType());
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if (const Constant *constant = dyn_cast<Constant>(value))
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{
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if (!ResolveConstant (data_address, constant))
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{
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lldb_private::Error free_error;
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m_memory_map.Free(data_address, free_error);
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return LLDB_INVALID_ADDRESS;
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}
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}
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m_values[value] = data_address;
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return data_address;
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}
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};
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static const char *unsupported_opcode_error = "Interpreter doesn't handle one of the expression's opcodes";
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static const char *unsupported_operand_error = "Interpreter doesn't handle one of the expression's operands";
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//static const char *interpreter_initialization_error = "Interpreter couldn't be initialized";
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static const char *interpreter_internal_error = "Interpreter encountered an internal error";
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static const char *bad_value_error = "Interpreter couldn't resolve a value during execution";
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static const char *memory_allocation_error = "Interpreter couldn't allocate memory";
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static const char *memory_write_error = "Interpreter couldn't write to memory";
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static const char *memory_read_error = "Interpreter couldn't read from memory";
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static const char *infinite_loop_error = "Interpreter ran for too many cycles";
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//static const char *bad_result_error = "Result of expression is in bad memory";
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bool
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IRInterpreter::CanInterpret (llvm::Module &module,
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llvm::Function &function,
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lldb_private::Error &error)
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{
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lldb_private::Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
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for (Function::iterator bbi = function.begin(), bbe = function.end();
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bbi != bbe;
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++bbi)
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{
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for (BasicBlock::iterator ii = bbi->begin(), ie = bbi->end();
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ii != ie;
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++ii)
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{
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switch (ii->getOpcode())
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{
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default:
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{
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if (log)
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log->Printf("Unsupported instruction: %s", PrintValue(ii).c_str());
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error.SetErrorToGenericError();
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error.SetErrorString(unsupported_opcode_error);
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return false;
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}
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case Instruction::Add:
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case Instruction::Alloca:
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case Instruction::BitCast:
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case Instruction::Br:
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case Instruction::GetElementPtr:
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break;
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case Instruction::ICmp:
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{
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ICmpInst *icmp_inst = dyn_cast<ICmpInst>(ii);
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if (!icmp_inst)
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{
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error.SetErrorToGenericError();
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error.SetErrorString(interpreter_internal_error);
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return false;
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}
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switch (icmp_inst->getPredicate())
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{
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default:
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{
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if (log)
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log->Printf("Unsupported ICmp predicate: %s", PrintValue(ii).c_str());
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error.SetErrorToGenericError();
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error.SetErrorString(unsupported_opcode_error);
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return false;
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}
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case CmpInst::ICMP_EQ:
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case CmpInst::ICMP_NE:
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case CmpInst::ICMP_UGT:
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case CmpInst::ICMP_UGE:
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case CmpInst::ICMP_ULT:
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case CmpInst::ICMP_ULE:
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case CmpInst::ICMP_SGT:
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case CmpInst::ICMP_SGE:
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case CmpInst::ICMP_SLT:
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case CmpInst::ICMP_SLE:
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break;
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}
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}
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break;
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case Instruction::And:
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case Instruction::AShr:
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case Instruction::IntToPtr:
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case Instruction::PtrToInt:
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case Instruction::Load:
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case Instruction::LShr:
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case Instruction::Mul:
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case Instruction::Or:
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case Instruction::Ret:
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case Instruction::SDiv:
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case Instruction::Shl:
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case Instruction::SRem:
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case Instruction::Store:
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case Instruction::Sub:
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case Instruction::UDiv:
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case Instruction::URem:
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case Instruction::Xor:
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case Instruction::ZExt:
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break;
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}
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for (int oi = 0, oe = ii->getNumOperands();
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oi != oe;
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++oi)
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{
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Value *operand = ii->getOperand(oi);
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Type *operand_type = operand->getType();
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switch (operand_type->getTypeID())
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{
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default:
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break;
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case Type::VectorTyID:
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{
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if (log)
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log->Printf("Unsupported operand type: %s", PrintType(operand_type).c_str());
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error.SetErrorString(unsupported_operand_error);
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return false;
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}
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}
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}
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}
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}
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return true;}
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bool
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IRInterpreter::Interpret (llvm::Module &module,
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llvm::Function &function,
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llvm::ArrayRef<lldb::addr_t> args,
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lldb_private::IRMemoryMap &memory_map,
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lldb_private::Error &error,
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lldb::addr_t stack_frame_bottom,
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lldb::addr_t stack_frame_top)
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{
|
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lldb_private::Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
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|
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if (log)
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{
|
|
std::string s;
|
|
raw_string_ostream oss(s);
|
|
|
|
module.print(oss, NULL);
|
|
|
|
oss.flush();
|
|
|
|
log->Printf("Module as passed in to IRInterpreter::Interpret: \n\"%s\"", s.c_str());
|
|
}
|
|
|
|
DataLayout data_layout(&module);
|
|
|
|
InterpreterStackFrame frame(data_layout, memory_map, stack_frame_bottom, stack_frame_top);
|
|
|
|
if (frame.m_frame_process_address == LLDB_INVALID_ADDRESS)
|
|
{
|
|
error.SetErrorString("Couldn't allocate stack frame");
|
|
}
|
|
|
|
int arg_index = 0;
|
|
|
|
for (llvm::Function::arg_iterator ai = function.arg_begin(), ae = function.arg_end();
|
|
ai != ae;
|
|
++ai, ++arg_index)
|
|
{
|
|
if (args.size() < arg_index)
|
|
{
|
|
error.SetErrorString ("Not enough arguments passed in to function");
|
|
return false;
|
|
}
|
|
|
|
lldb::addr_t ptr = args[arg_index];
|
|
|
|
frame.MakeArgument(ai, ptr);
|
|
}
|
|
|
|
uint32_t num_insts = 0;
|
|
|
|
frame.Jump(function.begin());
|
|
|
|
while (frame.m_ii != frame.m_ie && (++num_insts < 4096))
|
|
{
|
|
const Instruction *inst = frame.m_ii;
|
|
|
|
if (log)
|
|
log->Printf("Interpreting %s", PrintValue(inst).c_str());
|
|
|
|
switch (inst->getOpcode())
|
|
{
|
|
default:
|
|
break;
|
|
case Instruction::Add:
|
|
case Instruction::Sub:
|
|
case Instruction::Mul:
|
|
case Instruction::SDiv:
|
|
case Instruction::UDiv:
|
|
case Instruction::SRem:
|
|
case Instruction::URem:
|
|
case Instruction::Shl:
|
|
case Instruction::LShr:
|
|
case Instruction::AShr:
|
|
case Instruction::And:
|
|
case Instruction::Or:
|
|
case Instruction::Xor:
|
|
{
|
|
const BinaryOperator *bin_op = dyn_cast<BinaryOperator>(inst);
|
|
|
|
if (!bin_op)
|
|
{
|
|
if (log)
|
|
log->Printf("getOpcode() returns %s, but instruction is not a BinaryOperator", inst->getOpcodeName());
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(interpreter_internal_error);
|
|
return false;
|
|
}
|
|
|
|
Value *lhs = inst->getOperand(0);
|
|
Value *rhs = inst->getOperand(1);
|
|
|
|
lldb_private::Scalar L;
|
|
lldb_private::Scalar R;
|
|
|
|
if (!frame.EvaluateValue(L, lhs, module))
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't evaluate %s", PrintValue(lhs).c_str());
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(bad_value_error);
|
|
return false;
|
|
}
|
|
|
|
if (!frame.EvaluateValue(R, rhs, module))
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't evaluate %s", PrintValue(rhs).c_str());
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(bad_value_error);
|
|
return false;
|
|
}
|
|
|
|
lldb_private::Scalar result;
|
|
|
|
switch (inst->getOpcode())
|
|
{
|
|
default:
|
|
break;
|
|
case Instruction::Add:
|
|
result = L + R;
|
|
break;
|
|
case Instruction::Mul:
|
|
result = L * R;
|
|
break;
|
|
case Instruction::Sub:
|
|
result = L - R;
|
|
break;
|
|
case Instruction::SDiv:
|
|
result = L / R;
|
|
break;
|
|
case Instruction::UDiv:
|
|
result = L.GetRawBits64(0) / R.GetRawBits64(1);
|
|
break;
|
|
case Instruction::SRem:
|
|
result = L % R;
|
|
break;
|
|
case Instruction::URem:
|
|
result = L.GetRawBits64(0) % R.GetRawBits64(1);
|
|
break;
|
|
case Instruction::Shl:
|
|
result = L << R;
|
|
break;
|
|
case Instruction::AShr:
|
|
result = L >> R;
|
|
break;
|
|
case Instruction::LShr:
|
|
result = L;
|
|
result.ShiftRightLogical(R);
|
|
break;
|
|
case Instruction::And:
|
|
result = L & R;
|
|
break;
|
|
case Instruction::Or:
|
|
result = L | R;
|
|
break;
|
|
case Instruction::Xor:
|
|
result = L ^ R;
|
|
break;
|
|
}
|
|
|
|
frame.AssignValue(inst, result, module);
|
|
|
|
if (log)
|
|
{
|
|
log->Printf("Interpreted a %s", inst->getOpcodeName());
|
|
log->Printf(" L : %s", frame.SummarizeValue(lhs).c_str());
|
|
log->Printf(" R : %s", frame.SummarizeValue(rhs).c_str());
|
|
log->Printf(" = : %s", frame.SummarizeValue(inst).c_str());
|
|
}
|
|
}
|
|
break;
|
|
case Instruction::Alloca:
|
|
{
|
|
const AllocaInst *alloca_inst = dyn_cast<AllocaInst>(inst);
|
|
|
|
if (!alloca_inst)
|
|
{
|
|
if (log)
|
|
log->Printf("getOpcode() returns Alloca, but instruction is not an AllocaInst");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(interpreter_internal_error);
|
|
return false;
|
|
}
|
|
|
|
if (alloca_inst->isArrayAllocation())
|
|
{
|
|
if (log)
|
|
log->Printf("AllocaInsts are not handled if isArrayAllocation() is true");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(unsupported_opcode_error);
|
|
return false;
|
|
}
|
|
|
|
// The semantics of Alloca are:
|
|
// Create a region R of virtual memory of type T, backed by a data buffer
|
|
// Create a region P of virtual memory of type T*, backed by a data buffer
|
|
// Write the virtual address of R into P
|
|
|
|
Type *T = alloca_inst->getAllocatedType();
|
|
Type *Tptr = alloca_inst->getType();
|
|
|
|
lldb::addr_t R = frame.Malloc(T);
|
|
|
|
if (R == LLDB_INVALID_ADDRESS)
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't allocate memory for an AllocaInst");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(memory_allocation_error);
|
|
return false;
|
|
}
|
|
|
|
lldb::addr_t P = frame.Malloc(Tptr);
|
|
|
|
if (P == LLDB_INVALID_ADDRESS)
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't allocate the result pointer for an AllocaInst");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(memory_allocation_error);
|
|
return false;
|
|
}
|
|
|
|
lldb_private::Error write_error;
|
|
|
|
memory_map.WritePointerToMemory(P, R, write_error);
|
|
|
|
if (!write_error.Success())
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't write the result pointer for an AllocaInst");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(memory_write_error);
|
|
lldb_private::Error free_error;
|
|
memory_map.Free(P, free_error);
|
|
memory_map.Free(R, free_error);
|
|
return false;
|
|
}
|
|
|
|
frame.m_values[alloca_inst] = P;
|
|
|
|
if (log)
|
|
{
|
|
log->Printf("Interpreted an AllocaInst");
|
|
log->Printf(" R : 0x%llx", R);
|
|
log->Printf(" P : 0x%llx", P);
|
|
}
|
|
}
|
|
break;
|
|
case Instruction::BitCast:
|
|
case Instruction::ZExt:
|
|
{
|
|
const CastInst *cast_inst = dyn_cast<CastInst>(inst);
|
|
|
|
if (!cast_inst)
|
|
{
|
|
if (log)
|
|
log->Printf("getOpcode() returns %s, but instruction is not a BitCastInst", cast_inst->getOpcodeName());
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(interpreter_internal_error);
|
|
return false;
|
|
}
|
|
|
|
Value *source = cast_inst->getOperand(0);
|
|
|
|
lldb_private::Scalar S;
|
|
|
|
if (!frame.EvaluateValue(S, source, module))
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't evaluate %s", PrintValue(source).c_str());
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(bad_value_error);
|
|
return false;
|
|
}
|
|
|
|
frame.AssignValue(inst, S, module);
|
|
}
|
|
break;
|
|
case Instruction::Br:
|
|
{
|
|
const BranchInst *br_inst = dyn_cast<BranchInst>(inst);
|
|
|
|
if (!br_inst)
|
|
{
|
|
if (log)
|
|
log->Printf("getOpcode() returns Br, but instruction is not a BranchInst");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(interpreter_internal_error);
|
|
return false;
|
|
}
|
|
|
|
if (br_inst->isConditional())
|
|
{
|
|
Value *condition = br_inst->getCondition();
|
|
|
|
lldb_private::Scalar C;
|
|
|
|
if (!frame.EvaluateValue(C, condition, module))
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't evaluate %s", PrintValue(condition).c_str());
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(bad_value_error);
|
|
return false;
|
|
}
|
|
|
|
if (C.GetRawBits64(0))
|
|
frame.Jump(br_inst->getSuccessor(0));
|
|
else
|
|
frame.Jump(br_inst->getSuccessor(1));
|
|
|
|
if (log)
|
|
{
|
|
log->Printf("Interpreted a BrInst with a condition");
|
|
log->Printf(" cond : %s", frame.SummarizeValue(condition).c_str());
|
|
}
|
|
}
|
|
else
|
|
{
|
|
frame.Jump(br_inst->getSuccessor(0));
|
|
|
|
if (log)
|
|
{
|
|
log->Printf("Interpreted a BrInst with no condition");
|
|
}
|
|
}
|
|
}
|
|
continue;
|
|
case Instruction::GetElementPtr:
|
|
{
|
|
const GetElementPtrInst *gep_inst = dyn_cast<GetElementPtrInst>(inst);
|
|
|
|
if (!gep_inst)
|
|
{
|
|
if (log)
|
|
log->Printf("getOpcode() returns GetElementPtr, but instruction is not a GetElementPtrInst");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(interpreter_internal_error);
|
|
return false;
|
|
}
|
|
|
|
const Value *pointer_operand = gep_inst->getPointerOperand();
|
|
Type *pointer_type = pointer_operand->getType();
|
|
|
|
lldb_private::Scalar P;
|
|
|
|
if (!frame.EvaluateValue(P, pointer_operand, module))
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't evaluate %s", PrintValue(pointer_operand).c_str());
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(bad_value_error);
|
|
return false;
|
|
}
|
|
|
|
typedef SmallVector <Value *, 8> IndexVector;
|
|
typedef IndexVector::iterator IndexIterator;
|
|
|
|
SmallVector <Value *, 8> indices (gep_inst->idx_begin(),
|
|
gep_inst->idx_end());
|
|
|
|
SmallVector <Value *, 8> const_indices;
|
|
|
|
for (IndexIterator ii = indices.begin(), ie = indices.end();
|
|
ii != ie;
|
|
++ii)
|
|
{
|
|
ConstantInt *constant_index = dyn_cast<ConstantInt>(*ii);
|
|
|
|
if (!constant_index)
|
|
{
|
|
lldb_private::Scalar I;
|
|
|
|
if (!frame.EvaluateValue(I, *ii, module))
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't evaluate %s", PrintValue(*ii).c_str());
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(bad_value_error);
|
|
return false;
|
|
}
|
|
|
|
if (log)
|
|
log->Printf("Evaluated constant index %s as %llu", PrintValue(*ii).c_str(), I.ULongLong(LLDB_INVALID_ADDRESS));
|
|
|
|
constant_index = cast<ConstantInt>(ConstantInt::get((*ii)->getType(), I.ULongLong(LLDB_INVALID_ADDRESS)));
|
|
}
|
|
|
|
const_indices.push_back(constant_index);
|
|
}
|
|
|
|
uint64_t offset = data_layout.getIndexedOffset(pointer_type, const_indices);
|
|
|
|
lldb_private::Scalar Poffset = P + offset;
|
|
|
|
frame.AssignValue(inst, Poffset, module);
|
|
|
|
if (log)
|
|
{
|
|
log->Printf("Interpreted a GetElementPtrInst");
|
|
log->Printf(" P : %s", frame.SummarizeValue(pointer_operand).c_str());
|
|
log->Printf(" Poffset : %s", frame.SummarizeValue(inst).c_str());
|
|
}
|
|
}
|
|
break;
|
|
case Instruction::ICmp:
|
|
{
|
|
const ICmpInst *icmp_inst = dyn_cast<ICmpInst>(inst);
|
|
|
|
if (!icmp_inst)
|
|
{
|
|
if (log)
|
|
log->Printf("getOpcode() returns ICmp, but instruction is not an ICmpInst");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(interpreter_internal_error);
|
|
return false;
|
|
}
|
|
|
|
CmpInst::Predicate predicate = icmp_inst->getPredicate();
|
|
|
|
Value *lhs = inst->getOperand(0);
|
|
Value *rhs = inst->getOperand(1);
|
|
|
|
lldb_private::Scalar L;
|
|
lldb_private::Scalar R;
|
|
|
|
if (!frame.EvaluateValue(L, lhs, module))
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't evaluate %s", PrintValue(lhs).c_str());
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(bad_value_error);
|
|
return false;
|
|
}
|
|
|
|
if (!frame.EvaluateValue(R, rhs, module))
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't evaluate %s", PrintValue(rhs).c_str());
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(bad_value_error);
|
|
return false;
|
|
}
|
|
|
|
lldb_private::Scalar result;
|
|
|
|
switch (predicate)
|
|
{
|
|
default:
|
|
return false;
|
|
case CmpInst::ICMP_EQ:
|
|
result = (L == R);
|
|
break;
|
|
case CmpInst::ICMP_NE:
|
|
result = (L != R);
|
|
break;
|
|
case CmpInst::ICMP_UGT:
|
|
result = (L.GetRawBits64(0) > R.GetRawBits64(0));
|
|
break;
|
|
case CmpInst::ICMP_UGE:
|
|
result = (L.GetRawBits64(0) >= R.GetRawBits64(0));
|
|
break;
|
|
case CmpInst::ICMP_ULT:
|
|
result = (L.GetRawBits64(0) < R.GetRawBits64(0));
|
|
break;
|
|
case CmpInst::ICMP_ULE:
|
|
result = (L.GetRawBits64(0) <= R.GetRawBits64(0));
|
|
break;
|
|
case CmpInst::ICMP_SGT:
|
|
result = (L > R);
|
|
break;
|
|
case CmpInst::ICMP_SGE:
|
|
result = (L >= R);
|
|
break;
|
|
case CmpInst::ICMP_SLT:
|
|
result = (L < R);
|
|
break;
|
|
case CmpInst::ICMP_SLE:
|
|
result = (L <= R);
|
|
break;
|
|
}
|
|
|
|
frame.AssignValue(inst, result, module);
|
|
|
|
if (log)
|
|
{
|
|
log->Printf("Interpreted an ICmpInst");
|
|
log->Printf(" L : %s", frame.SummarizeValue(lhs).c_str());
|
|
log->Printf(" R : %s", frame.SummarizeValue(rhs).c_str());
|
|
log->Printf(" = : %s", frame.SummarizeValue(inst).c_str());
|
|
}
|
|
}
|
|
break;
|
|
case Instruction::IntToPtr:
|
|
{
|
|
const IntToPtrInst *int_to_ptr_inst = dyn_cast<IntToPtrInst>(inst);
|
|
|
|
if (!int_to_ptr_inst)
|
|
{
|
|
if (log)
|
|
log->Printf("getOpcode() returns IntToPtr, but instruction is not an IntToPtrInst");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(interpreter_internal_error);
|
|
return false;
|
|
}
|
|
|
|
Value *src_operand = int_to_ptr_inst->getOperand(0);
|
|
|
|
lldb_private::Scalar I;
|
|
|
|
if (!frame.EvaluateValue(I, src_operand, module))
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't evaluate %s", PrintValue(src_operand).c_str());
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(bad_value_error);
|
|
return false;
|
|
}
|
|
|
|
frame.AssignValue(inst, I, module);
|
|
|
|
if (log)
|
|
{
|
|
log->Printf("Interpreted an IntToPtr");
|
|
log->Printf(" Src : %s", frame.SummarizeValue(src_operand).c_str());
|
|
log->Printf(" = : %s", frame.SummarizeValue(inst).c_str());
|
|
}
|
|
}
|
|
break;
|
|
case Instruction::PtrToInt:
|
|
{
|
|
const PtrToIntInst *ptr_to_int_inst = dyn_cast<PtrToIntInst>(inst);
|
|
|
|
if (!ptr_to_int_inst)
|
|
{
|
|
if (log)
|
|
log->Printf("getOpcode() returns PtrToInt, but instruction is not an PtrToIntInst");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(interpreter_internal_error);
|
|
return false;
|
|
}
|
|
|
|
Value *src_operand = ptr_to_int_inst->getOperand(0);
|
|
|
|
lldb_private::Scalar I;
|
|
|
|
if (!frame.EvaluateValue(I, src_operand, module))
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't evaluate %s", PrintValue(src_operand).c_str());
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(bad_value_error);
|
|
return false;
|
|
}
|
|
|
|
frame.AssignValue(inst, I, module);
|
|
|
|
if (log)
|
|
{
|
|
log->Printf("Interpreted a PtrToInt");
|
|
log->Printf(" Src : %s", frame.SummarizeValue(src_operand).c_str());
|
|
log->Printf(" = : %s", frame.SummarizeValue(inst).c_str());
|
|
}
|
|
}
|
|
break;
|
|
case Instruction::Load:
|
|
{
|
|
const LoadInst *load_inst = dyn_cast<LoadInst>(inst);
|
|
|
|
if (!load_inst)
|
|
{
|
|
if (log)
|
|
log->Printf("getOpcode() returns Load, but instruction is not a LoadInst");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(interpreter_internal_error);
|
|
return false;
|
|
}
|
|
|
|
// The semantics of Load are:
|
|
// Create a region D that will contain the loaded data
|
|
// Resolve the region P containing a pointer
|
|
// Dereference P to get the region R that the data should be loaded from
|
|
// Transfer a unit of type type(D) from R to D
|
|
|
|
const Value *pointer_operand = load_inst->getPointerOperand();
|
|
|
|
Type *pointer_ty = pointer_operand->getType();
|
|
PointerType *pointer_ptr_ty = dyn_cast<PointerType>(pointer_ty);
|
|
if (!pointer_ptr_ty)
|
|
{
|
|
if (log)
|
|
log->Printf("getPointerOperand()->getType() is not a PointerType");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(interpreter_internal_error);
|
|
return false;
|
|
}
|
|
Type *target_ty = pointer_ptr_ty->getElementType();
|
|
|
|
lldb::addr_t D = frame.ResolveValue(load_inst, module);
|
|
lldb::addr_t P = frame.ResolveValue(pointer_operand, module);
|
|
|
|
if (D == LLDB_INVALID_ADDRESS)
|
|
{
|
|
if (log)
|
|
log->Printf("LoadInst's value doesn't resolve to anything");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(bad_value_error);
|
|
return false;
|
|
}
|
|
|
|
if (P == LLDB_INVALID_ADDRESS)
|
|
{
|
|
if (log)
|
|
log->Printf("LoadInst's pointer doesn't resolve to anything");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(bad_value_error);
|
|
return false;
|
|
}
|
|
|
|
lldb::addr_t R;
|
|
lldb_private::Error read_error;
|
|
memory_map.ReadPointerFromMemory(&R, P, read_error);
|
|
|
|
if (!read_error.Success())
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't read the address to be loaded for a LoadInst");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(memory_read_error);
|
|
return false;
|
|
}
|
|
|
|
size_t target_size = data_layout.getTypeStoreSize(target_ty);
|
|
lldb_private::DataBufferHeap buffer(target_size, 0);
|
|
|
|
read_error.Clear();
|
|
memory_map.ReadMemory(buffer.GetBytes(), R, buffer.GetByteSize(), read_error);
|
|
if (!read_error.Success())
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't read from a region on behalf of a LoadInst");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(memory_read_error);
|
|
return false;
|
|
}
|
|
|
|
lldb_private::Error write_error;
|
|
memory_map.WriteMemory(D, buffer.GetBytes(), buffer.GetByteSize(), write_error);
|
|
if (!write_error.Success())
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't write to a region on behalf of a LoadInst");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(memory_read_error);
|
|
return false;
|
|
}
|
|
|
|
if (log)
|
|
{
|
|
log->Printf("Interpreted a LoadInst");
|
|
log->Printf(" P : 0x%llx", P);
|
|
log->Printf(" R : 0x%llx", R);
|
|
log->Printf(" D : 0x%llx", D);
|
|
}
|
|
}
|
|
break;
|
|
case Instruction::Ret:
|
|
{
|
|
return true;
|
|
}
|
|
case Instruction::Store:
|
|
{
|
|
const StoreInst *store_inst = dyn_cast<StoreInst>(inst);
|
|
|
|
if (!store_inst)
|
|
{
|
|
if (log)
|
|
log->Printf("getOpcode() returns Store, but instruction is not a StoreInst");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(interpreter_internal_error);
|
|
return false;
|
|
}
|
|
|
|
// The semantics of Store are:
|
|
// Resolve the region D containing the data to be stored
|
|
// Resolve the region P containing a pointer
|
|
// Dereference P to get the region R that the data should be stored in
|
|
// Transfer a unit of type type(D) from D to R
|
|
|
|
const Value *value_operand = store_inst->getValueOperand();
|
|
const Value *pointer_operand = store_inst->getPointerOperand();
|
|
|
|
Type *pointer_ty = pointer_operand->getType();
|
|
PointerType *pointer_ptr_ty = dyn_cast<PointerType>(pointer_ty);
|
|
if (!pointer_ptr_ty)
|
|
return false;
|
|
Type *target_ty = pointer_ptr_ty->getElementType();
|
|
|
|
lldb::addr_t D = frame.ResolveValue(value_operand, module);
|
|
lldb::addr_t P = frame.ResolveValue(pointer_operand, module);
|
|
|
|
if (D == LLDB_INVALID_ADDRESS)
|
|
{
|
|
if (log)
|
|
log->Printf("StoreInst's value doesn't resolve to anything");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(bad_value_error);
|
|
return false;
|
|
}
|
|
|
|
if (P == LLDB_INVALID_ADDRESS)
|
|
{
|
|
if (log)
|
|
log->Printf("StoreInst's pointer doesn't resolve to anything");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(bad_value_error);
|
|
return false;
|
|
}
|
|
|
|
lldb::addr_t R;
|
|
lldb_private::Error read_error;
|
|
memory_map.ReadPointerFromMemory(&R, P, read_error);
|
|
|
|
if (!read_error.Success())
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't read the address to be loaded for a LoadInst");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(memory_read_error);
|
|
return false;
|
|
}
|
|
|
|
size_t target_size = data_layout.getTypeStoreSize(target_ty);
|
|
lldb_private::DataBufferHeap buffer(target_size, 0);
|
|
|
|
read_error.Clear();
|
|
memory_map.ReadMemory(buffer.GetBytes(), D, buffer.GetByteSize(), read_error);
|
|
if (!read_error.Success())
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't read from a region on behalf of a StoreInst");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(memory_read_error);
|
|
return false;
|
|
}
|
|
|
|
lldb_private::Error write_error;
|
|
memory_map.WriteMemory(R, buffer.GetBytes(), buffer.GetByteSize(), write_error);
|
|
if (!write_error.Success())
|
|
{
|
|
if (log)
|
|
log->Printf("Couldn't write to a region on behalf of a StoreInst");
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(memory_write_error);
|
|
return false;
|
|
}
|
|
|
|
if (log)
|
|
{
|
|
log->Printf("Interpreted a StoreInst");
|
|
log->Printf(" D : 0x%llx", D);
|
|
log->Printf(" P : 0x%llx", P);
|
|
log->Printf(" R : 0x%llx", R);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
++frame.m_ii;
|
|
}
|
|
|
|
if (num_insts >= 4096)
|
|
{
|
|
error.SetErrorToGenericError();
|
|
error.SetErrorString(infinite_loop_error);
|
|
return false;
|
|
}
|
|
|
|
return false;
|
|
}
|