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115 lines
2.9 KiB
C++
115 lines
2.9 KiB
C++
//===-- llvm/CodeGen/DwarfWriter.cpp - Dwarf Framework ----------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by James M. Laskey and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains support for writing dwarf debug info into asm files.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/CodeGen/DwarfWriter.h"
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#include "llvm/Support/CommandLine.h"
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namespace llvm {
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static cl::opt<bool>
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DwarfVerbose("dwarf-verbose", cl::Hidden,
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cl::desc("Add comments to dwarf directives."));
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/// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
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/// unsigned leb128 value.
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///
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void DwarfWriter::EmitULEB128Bytes(unsigned Value, std::string Comment) {
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if (hasLEB128) {
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O << "\t.uleb128\t"
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<< Value;
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} else {
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O << Asm->getData8bitsDirective();
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EmitULEB128(Value);
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}
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if (DwarfVerbose) {
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O << "\t"
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<< Asm->getCommentString()
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<< " "
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<< Comment
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<< " "
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<< Value;
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}
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O << "\n";
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}
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/// EmitSLEB128Bytes - Emit an assembler byte data directive to compose a
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/// signed leb128 value.
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///
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void DwarfWriter::EmitSLEB128Bytes(int Value, std::string Comment) {
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if (hasLEB128) {
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O << "\t.sleb128\t"
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<< Value;
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} else {
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O << Asm->getData8bitsDirective();
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EmitSLEB128(Value);
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}
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if (DwarfVerbose) {
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O << "\t"
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<< Asm->getCommentString()
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<< " "
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<< Comment
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<< " "
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<< Value;
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}
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O << "\n";
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}
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/// BeginModule - Emit all dwarf sections that should come prior to the content.
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///
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void DwarfWriter::BeginModule() {
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if (!DebugInfo.hasInfo()) return;
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EmitComment("Dwarf Begin Module");
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// define base addresses for dwarf sections
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Asm->SwitchSection(DwarfAbbrevSection, 0);
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EmitLabel("abbrev", 0);
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Asm->SwitchSection(DwarfInfoSection, 0);
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EmitLabel("info", 0);
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Asm->SwitchSection(DwarfLineSection, 0);
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EmitLabel("line", 0);
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}
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/// EndModule - Emit all dwarf sections that should come after the content.
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///
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void DwarfWriter::EndModule() {
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if (!DebugInfo.hasInfo()) return;
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EmitComment("Dwarf End Module");
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// Print out dwarf file info
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std::vector<std::string> Sources = DebugInfo.getSourceFiles();
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for (unsigned i = 0, N = Sources.size(); i < N; i++) {
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O << "\t; .file\t" << (i + 1) << "," << "\"" << Sources[i] << "\"" << "\n";
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}
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}
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/// BeginFunction - Emit pre-function debug information.
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///
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void DwarfWriter::BeginFunction() {
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if (!DebugInfo.hasInfo()) return;
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EmitComment("Dwarf Begin Function");
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}
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/// EndFunction - Emit post-function debug information.
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///
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void DwarfWriter::EndFunction() {
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if (!DebugInfo.hasInfo()) return;
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EmitComment("Dwarf End Function");
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}
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} // End llvm namespace
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