#include "lldb/Expression/DWARFExpression.h"
#include <cinttypes>
#include <optional>
#include <vector>
#include "lldb/Core/Module.h"
#include "lldb/Core/Value.h"
#include "lldb/Utility/DataEncoder.h"
#include "lldb/Utility/LLDBLog.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/RegisterValue.h"
#include "lldb/Utility/Scalar.h"
#include "lldb/Utility/StreamString.h"
#include "lldb/Utility/VMRange.h"
#include "lldb/Host/Host.h"
#include "lldb/Utility/Endian.h"
#include "lldb/Symbol/Function.h"
#include "lldb/Target/ABI.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/StackFrame.h"
#include "lldb/Target/StackID.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Thread.h"
#include "llvm/DebugInfo/DWARF/DWARFExpressionPrinter.h"
#include "llvm/DebugInfo/DWARF/LowLevel/DWARFExpression.h"

Functions
static lldb::offset_t	GetOpcodeDataSize (const DataExtractor &data, const lldb::offset_t data_offset, const LocationAtom op, const DWARFExpression::Delegate *dwarf_cu)
	Return the length in bytes of the set of operands for `op`.
static const char *	DW_OP_value_to_name (uint32_t val)
static llvm::Error	Evaluate_DW_OP_entry_value (DWARFExpression::Stack &stack, ExecutionContext exe_ctx, RegisterContext reg_ctx, const DataExtractor &opcodes, lldb::offset_t &opcode_offset, Log *log)
static llvm::Expected< lldb::addr_t >	ResolveLoadAddress (ExecutionContext exe_ctx, lldb::ModuleSP &module_sp, const char dw_op_type, lldb::addr_t file_addr, Address &so_addr, bool check_sectionoffset=false)
	Helper function to move common code used to resolve a file address and turn into a load address.
static Scalar	DerefSizeExtractDataHelper (uint8_t *addr_bytes, size_t size_addr_bytes, ByteOrder byte_order, size_t size)
	Helper function to load sized data from a uint8_t buffer.
static llvm::Error	Evaluate_DW_OP_deref_size (DWARFExpression::Stack &stack, ExecutionContext exe_ctx, lldb::ModuleSP module_sp, Process process, Target *target, uint8_t size, size_t size_addr_bytes, LocationDescriptionKind &dwarf4_location_description_kind)

Function Documentation

◆ DerefSizeExtractDataHelper()

Scalar DerefSizeExtractDataHelper	(	uint8_t *	addr_bytes,
		size_t	size_addr_bytes,
		ByteOrder	byte_order,
		size_t	size )

static

Helper function to load sized data from a uint8_t buffer.

Parameters

addr_bytes	The buffer containing raw data.
size_addr_bytes	How large is the underlying raw data.
byte_order	What is the byte order of the underlying data.
size	How much of the underlying data we want to use.

Returns: The underlying data converted into a Scalar.

Definition at line 871 of file DWARFExpression.cpp.

References lldb_private::DataExtractor::GetAddress(), and lldb_private::DataExtractor::GetMaxU64().

Referenced by Evaluate_DW_OP_deref_size().

◆ DW_OP_value_to_name()

const char * DW_OP_value_to_name ( uint32_t val )

static

Definition at line 395 of file DWARFExpression.cpp.

Referenced by lldb_private::DWARFExpression::Evaluate(), and lldb_private::DWARFExpression::GetLocation_DW_OP_addr().

◆ Evaluate_DW_OP_deref_size()

llvm::Error Evaluate_DW_OP_deref_size	(	DWARFExpression::Stack &	stack,
		ExecutionContext *	exe_ctx,
		lldb::ModuleSP	module_sp,
		Process *	process,
		Target *	target,
		uint8_t	size,
		size_t	size_addr_bytes,
		LocationDescriptionKind &	dwarf4_location_description_kind )

static

Definition at line 882 of file DWARFExpression.cpp.

References DerefSizeExtractDataHelper(), error(), lldb_private::Value::FileAddress, lldb_private::ObjectFile::GetByteOrder(), lldb_private::Process::GetByteOrder(), lldb_private::Value::HostAddress, lldb_private::Value::Invalid, lldb_private::Address::IsSectionOffset(), LLDB_INVALID_ADDRESS, lldb_private::Value::LoadAddress, lldb_private::Memory, lldb_private::Process::ReadMemory(), lldb_private::Target::ReadMemory(), ResolveLoadAddress(), lldb_private::Value::Scalar, and lldb_private::Scalar::TruncOrExtendTo().

Referenced by lldb_private::DWARFExpression::Evaluate().

◆ Evaluate_DW_OP_entry_value()

llvm::Error Evaluate_DW_OP_entry_value	(	DWARFExpression::Stack &	stack,
		ExecutionContext *	exe_ctx,
		RegisterContext *	reg_ctx,
		const DataExtractor &	opcodes,
		lldb::offset_t &	opcode_offset,
		Log *	log )

static

Definition at line 593 of file DWARFExpression.cpp.

References lldb_private::DataExtractor::BytesLeft(), lldb_private::DWARFExpressionList::Evaluate(), lldb_private::SymbolContext::function, lldb_private::Function::GetCallEdgeForReturnAddress(), lldb_private::CallEdge::GetCallee(), lldb_private::CallEdge::GetCallSiteParameters(), lldb_private::DataExtractor::GetData(), lldb_private::StackFrame::GetFrameIndex(), lldb_private::ExecutionContext::GetFramePtr(), lldb_private::Target::GetImages(), lldb_private::Function::GetName(), lldb_private::StackFrame::GetSymbolContext(), lldb_private::Function::GetTailCallingEdges(), lldb_private::ExecutionContext::GetTargetRef(), lldb_private::ExecutionContext::GetThreadPtr(), lldb_private::DataExtractor::GetULEB128(), lldb_private::ExecutionContext::HasTargetScope(), LLDB_INVALID_ADDRESS, LLDB_LOG, lldb_private::CallSiteParameter::LocationInCaller, and lldb_private::ExecutionContext::SetFrameSP().

Referenced by lldb_private::DWARFExpression::Evaluate().

◆ GetOpcodeDataSize()

lldb::offset_t GetOpcodeDataSize	(	const DataExtractor &	data,
		const lldb::offset_t	data_offset,
		const LocationAtom	op,
		const DWARFExpression::Delegate *	dwarf_cu )

static

Return the length in bytes of the set of operands for op.

No guarantees are made on the state of data after this call.

Definition at line 132 of file DWARFExpression.cpp.

References lldb_private::DataExtractor::GetAddressByteSize(), lldb_private::DWARFExpression::Delegate::GetAddressByteSize(), lldb_private::DataExtractor::GetU8(), lldb_private::DataExtractor::GetULEB128(), lldb_private::DWARFExpression::Delegate::GetVendorDWARFOpcodeSize(), LLDB_INVALID_OFFSET, and lldb_private::DataExtractor::Skip_LEB128().

Referenced by lldb_private::DWARFExpression::ContainsThreadLocalStorage(), lldb_private::DWARFExpression::GetLocation_DW_OP_addr(), lldb_private::DWARFExpression::LinkThreadLocalStorage(), and lldb_private::DWARFExpression::Update_DW_OP_addr().

◆ ResolveLoadAddress()

llvm::Expected< lldb::addr_t > ResolveLoadAddress	(	ExecutionContext *	exe_ctx,
		lldb::ModuleSP &	module_sp,
		const char *	dw_op_type,
		lldb::addr_t	file_addr,
		Address &	so_addr,
		bool	check_sectionoffset = false )

static

Helper function to move common code used to resolve a file address and turn into a load address.

Parameters

exe_ctx	Pointer to the execution context
module_sp	shared_ptr contains the module if we have one
dw_op_type	C-style string used to vary the error output
file_addr	the file address we are trying to resolve and turn into a load address
so_addr	out parameter, will be set to load address or section offset
check_sectionoffset	bool which determines if having a section offset but not a load address is considerd a success

Returns: std::optional containing the load address if resolving and getting the load address succeed or an empty Optinal otherwise. If check_sectionoffset is true we consider LLDB_INVALID_ADDRESS a success if so_addr.IsSectionOffset() is true.

Definition at line 845 of file DWARFExpression.cpp.

References lldb_private::Address::GetLoadAddress(), lldb_private::ExecutionContext::GetTargetPtr(), lldb_private::Address::IsSectionOffset(), and LLDB_INVALID_ADDRESS.

Referenced by ProcessMachCore::DoGetMemoryRegionInfo(), and Evaluate_DW_OP_deref_size().

Functions

Function Documentation

◆ DerefSizeExtractDataHelper()

◆ DW_OP_value_to_name()

◆ Evaluate_DW_OP_deref_size()

◆ Evaluate_DW_OP_entry_value()

◆ GetOpcodeDataSize()

◆ ResolveLoadAddress()