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