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Place dwarf headers at earliest possible point. Well behaved when skipping

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functions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28781 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Laskey
2006-06-14 11:35:03 +00:00
parent f7a1212850
commit 014f98c7e5
5 changed files with 81 additions and 58 deletions
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98
lib/CodeGen/DwarfWriter.cpp
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@ -1646,7 +1646,11 @@ void DwarfWriter::ConstructRootScope(DebugScope *RootScope) {
/// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc
/// tools to recognize the object file contains Dwarf information.
///
void DwarfWriter::EmitInitial() const {
void DwarfWriter::EmitInitial() {
// Check to see if we already emitted intial headers.
if (didInitial) return;
didInitial = true;
// Dwarf sections base addresses.
Asm->SwitchToDataSection(DwarfFrameSection, 0);
EmitLabel("section_frame", 0);
@ -1676,6 +1680,9 @@ void DwarfWriter::EmitInitial() const {
EmitLabel("text_begin", 0);
Asm->SwitchToDataSection(DataSection, 0);
EmitLabel("data_begin", 0);
// Emit common frame information.
EmitInitialDebugFrame();
}
/// EmitDIE - Recusively Emits a debug information entry.
@ -2286,35 +2293,6 @@ void DwarfWriter::ConstructSubprogramDIEs() {
}
}
/// ShouldEmitDwarf - Determine if Dwarf declarations should be made.
///
bool DwarfWriter::ShouldEmitDwarf() {
// Check if debug info is present.
if (!DebugInfo || !DebugInfo->hasInfo()) return false;
// Make sure initial declarations are made.
if (!didInitial) {
EmitInitial();
// Emit common frame information.
EmitInitialDebugFrame();
// Create all the compile unit DIEs.
ConstructCompileUnitDIEs();
// Create DIEs for each of the externally visible global variables.
ConstructGlobalDIEs();
// Create DIEs for each of the externally visible subprograms.
ConstructSubprogramDIEs();
didInitial = true;
}
// Okay to emit.
return true;
}
//===----------------------------------------------------------------------===//
// Main entry points.
//
@ -2328,6 +2306,8 @@ DwarfWriter::DwarfWriter(std::ostream &OS, AsmPrinter *A)
, MF(NULL)
, DebugInfo(NULL)
, didInitial(false)
, shouldEmit(false)
, IsNormalText(false)
, SubprogramCount(0)
, CompileUnits()
, Abbreviations()
@ -2363,7 +2343,23 @@ DwarfWriter::~DwarfWriter() {
/// SetDebugInfo - Set DebugInfo when it's known that pass manager has
/// created it. Set by the target AsmPrinter.
void DwarfWriter::SetDebugInfo(MachineDebugInfo *DI) {
DebugInfo = DI;
// Make sure initial declarations are made.
if (!DebugInfo && DI->hasInfo()) {
DebugInfo = DI;
shouldEmit = true;
// Emit initial sections
EmitInitial();
// Create all the compile unit DIEs.
ConstructCompileUnitDIEs();
// Create DIEs for each of the externally visible global variables.
ConstructGlobalDIEs();
// Create DIEs for each of the externally visible subprograms.
ConstructSubprogramDIEs();
}
}
/// BeginModule - Emit all Dwarf sections that should come prior to the content.
@ -2420,17 +2416,24 @@ void DwarfWriter::EndModule() {
/// BeginFunction - Gather pre-function debug information. Assumes being
/// emitted immediately after the function entry point.
void DwarfWriter::BeginFunction(MachineFunction *MF) {
void DwarfWriter::BeginFunction(MachineFunction *MF, bool IsNormalText) {
this->MF = MF;
// FIXME - should be able to debug coalesced functions.
this->IsNormalText = IsNormalText;
// Begin accumulating function debug information.
DebugInfo->BeginFunction(MF);
// FIXME - should be able to debug coalesced functions.
if (IsNormalText) {
// Begin accumulating function debug information.
DebugInfo->BeginFunction(MF);
if (!ShouldEmitDwarf()) return;
EOL("Dwarf Begin Function");
if (!ShouldEmitDwarf()) return;
EOL("Dwarf Begin Function");
// Assumes in correct section after the entry point.
EmitLabel("func_begin", ++SubprogramCount);
// Assumes in correct section after the entry point.
EmitLabel("func_begin", ++SubprogramCount);
} else {
ShouldEmitDwarf();
}
}
/// EndFunction - Gather and emit post-function debug information.
@ -2439,14 +2442,17 @@ void DwarfWriter::EndFunction() {
if (!ShouldEmitDwarf()) return;
EOL("Dwarf End Function");
// Define end label for subprogram.
EmitLabel("func_end", SubprogramCount);
// FIXME - should be able to debug coalesced functions.
if (IsNormalText) {
// Define end label for subprogram.
EmitLabel("func_end", SubprogramCount);
// Construct scopes for subprogram.
ConstructRootScope(DebugInfo->getRootScope());
// Emit function frame information.
EmitFunctionDebugFrame();
// Construct scopes for subprogram.
ConstructRootScope(DebugInfo->getRootScope());
// Emit function frame information.
EmitFunctionDebugFrame();
}
// Clear function debug information.
DebugInfo->EndFunction();