You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
110 lines
3.6 KiB
110 lines
3.6 KiB
//===-- llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.h --------*- C++ -*--===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Common functionality for different debug information format backends.
|
|
// LLVM currently supports DWARF and CodeView.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DEBUGHANDLERBASE_H
|
|
#define LLVM_LIB_CODEGEN_ASMPRINTER_DEBUGHANDLERBASE_H
|
|
|
|
#include "AsmPrinterHandler.h"
|
|
#include "DbgValueHistoryCalculator.h"
|
|
#include "llvm/CodeGen/LexicalScopes.h"
|
|
#include "llvm/CodeGen/MachineInstr.h"
|
|
|
|
namespace llvm {
|
|
|
|
class AsmPrinter;
|
|
class MachineModuleInfo;
|
|
|
|
/// Base class for debug information backends. Common functionality related to
|
|
/// tracking which variables and scopes are alive at a given PC live here.
|
|
class DebugHandlerBase : public AsmPrinterHandler {
|
|
protected:
|
|
DebugHandlerBase(AsmPrinter *A);
|
|
|
|
/// Target of debug info emission.
|
|
AsmPrinter *Asm;
|
|
|
|
/// Collected machine module information.
|
|
MachineModuleInfo *MMI;
|
|
|
|
/// Previous instruction's location information. This is used to
|
|
/// determine label location to indicate scope boundries in dwarf
|
|
/// debug info.
|
|
DebugLoc PrevInstLoc;
|
|
MCSymbol *PrevLabel = nullptr;
|
|
|
|
/// This location indicates end of function prologue and beginning of
|
|
/// function body.
|
|
DebugLoc PrologEndLoc;
|
|
|
|
/// If nonnull, stores the current machine instruction we're processing.
|
|
const MachineInstr *CurMI = nullptr;
|
|
|
|
LexicalScopes LScopes;
|
|
|
|
/// History of DBG_VALUE and clobber instructions for each user
|
|
/// variable. Variables are listed in order of appearance.
|
|
DbgValueHistoryMap DbgValues;
|
|
|
|
/// Maps instruction with label emitted before instruction.
|
|
/// FIXME: Make this private from DwarfDebug, we have the necessary accessors
|
|
/// for it.
|
|
DenseMap<const MachineInstr *, MCSymbol *> LabelsBeforeInsn;
|
|
|
|
/// Maps instruction with label emitted after instruction.
|
|
DenseMap<const MachineInstr *, MCSymbol *> LabelsAfterInsn;
|
|
|
|
/// Indentify instructions that are marking the beginning of or
|
|
/// ending of a scope.
|
|
void identifyScopeMarkers();
|
|
|
|
/// Ensure that a label will be emitted before MI.
|
|
void requestLabelBeforeInsn(const MachineInstr *MI) {
|
|
LabelsBeforeInsn.insert(std::make_pair(MI, nullptr));
|
|
}
|
|
|
|
/// Ensure that a label will be emitted after MI.
|
|
void requestLabelAfterInsn(const MachineInstr *MI) {
|
|
LabelsAfterInsn.insert(std::make_pair(MI, nullptr));
|
|
}
|
|
|
|
// AsmPrinterHandler overrides.
|
|
public:
|
|
void beginInstruction(const MachineInstr *MI) override;
|
|
void endInstruction() override;
|
|
|
|
void beginFunction(const MachineFunction *MF) override;
|
|
void endFunction(const MachineFunction *MF) override;
|
|
|
|
/// Return Label preceding the instruction.
|
|
MCSymbol *getLabelBeforeInsn(const MachineInstr *MI);
|
|
|
|
/// Return Label immediately following the instruction.
|
|
MCSymbol *getLabelAfterInsn(const MachineInstr *MI);
|
|
|
|
/// Determine the relative position of the pieces described by P1 and P2.
|
|
/// Returns -1 if P1 is entirely before P2, 0 if P1 and P2 overlap,
|
|
/// 1 if P1 is entirely after P2.
|
|
static int pieceCmp(const DIExpression *P1, const DIExpression *P2);
|
|
|
|
/// Determine whether two variable pieces overlap.
|
|
static bool piecesOverlap(const DIExpression *P1, const DIExpression *P2);
|
|
|
|
/// If this type is derived from a base type then return base type size.
|
|
static uint64_t getBaseTypeSize(const DITypeRef TyRef);
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|