1 //===-- llvm/CodeGen/DwarfWriter.cpp - Dwarf Framework --------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains support for writing dwarf info into asm files.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/CodeGen/DwarfWriter.h"
15 #include "DwarfDebug.h"
16 #include "DwarfException.h"
17 #include "llvm/CodeGen/MachineModuleInfo.h"
21 static RegisterPass<DwarfWriter>
22 X("dwarfwriter", "DWARF Information Writer");
23 char DwarfWriter::ID = 0;
25 //===----------------------------------------------------------------------===//
26 /// DwarfWriter Implementation
29 DwarfWriter::DwarfWriter()
30 : ImmutablePass(&ID), DD(0), DE(0) {}
32 DwarfWriter::~DwarfWriter() {
37 /// BeginModule - Emit all Dwarf sections that should come prior to the
39 void DwarfWriter::BeginModule(Module *M,
40 MachineModuleInfo *MMI,
41 raw_ostream &OS, AsmPrinter *A,
43 DE = new DwarfException(OS, A, T);
44 DD = new DwarfDebug(OS, A, T);
45 DE->BeginModule(M, MMI);
46 DD->beginModule(M, MMI);
49 /// EndModule - Emit all Dwarf sections that should come after the content.
51 void DwarfWriter::EndModule() {
58 /// BeginFunction - Gather pre-function debug information. Assumes being
59 /// emitted immediately after the function entry point.
60 void DwarfWriter::BeginFunction(const MachineFunction *MF) {
61 DE->BeginFunction(MF);
62 DD->beginFunction(MF);
65 /// EndFunction - Gather and emit post-function debug information.
67 void DwarfWriter::EndFunction(const MachineFunction *MF) {
71 if (MachineModuleInfo *MMI = DD->getMMI() ? DD->getMMI() : DE->getMMI())
72 // Clear function debug information.
76 /// RecordSourceLine - Records location information and associates it with a
77 /// label. Returns a unique label ID used to generate a label and provide
78 /// correspondence to the source line list.
79 unsigned DwarfWriter::RecordSourceLine(unsigned Line, unsigned Col,
81 return DD->recordSourceLine(Line, Col, Scope);
84 /// getRecordSourceLineCount - Count source lines.
85 unsigned DwarfWriter::getRecordSourceLineCount() {
86 return DD->getSourceLineCount();
89 /// ShouldEmitDwarfDebug - Returns true if Dwarf debugging declarations should
91 bool DwarfWriter::ShouldEmitDwarfDebug() const {
92 return DD && DD->ShouldEmitDwarfDebug();
95 void DwarfWriter::BeginScope(const MachineInstr *MI, unsigned L) {
96 DD->beginScope(MI, L);
98 void DwarfWriter::EndScope(const MachineInstr *MI) {