First part of support for generating dwarf for assembly source files with the
-g flag. In this part we generate the .file for the source being assembled and
the .loc's for the assembled instructions.
The next part will be to generate the dwarf Compile Unit DIE and a dwarf
subprogram DIE for each non-temporary label.
Once the next part is done test cases will be added. rdar://9275556
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143509 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCParser/AsmParser.cpp b/lib/MC/MCParser/AsmParser.cpp
index d7ee1c4..990fd17 100644
--- a/lib/MC/MCParser/AsmParser.cpp
+++ b/lib/MC/MCParser/AsmParser.cpp
@@ -464,6 +464,14 @@
HadError = false;
AsmCond StartingCondState = TheCondState;
+ // If we are generating dwarf for assembly source files save the initial text
+ // section and generate a .file directive.
+ if (getContext().getGenDwarfForAssembly()) {
+ getContext().setGenDwarfSection(getStreamer().getCurrentSection());
+ getStreamer().EmitDwarfFileDirective(getContext().nextGenDwarfFileNumber(),
+ StringRef(), SrcMgr.getMemoryBuffer(CurBuffer)->getBufferIdentifier());
+ }
+
// While we have input, parse each statement.
while (Lexer.isNot(AsmToken::Eof)) {
if (!ParseStatement()) continue;
@@ -1211,6 +1219,18 @@
PrintMessage(IDLoc, SourceMgr::DK_Note, OS.str());
}
+ // If we are generating dwarf for assembly source files and the current
+ // section is the initial text section then generate a .loc directive for
+ // the instruction.
+ if (!HadError && getContext().getGenDwarfForAssembly() &&
+ getContext().getGenDwarfSection() == getStreamer().getCurrentSection() ) {
+ getStreamer().EmitDwarfLocDirective(getContext().getGenDwarfFileNumber(),
+ SrcMgr.FindLineNumber(IDLoc, CurBuffer),
+ 0, DWARF2_LINE_DEFAULT_IS_STMT ?
+ DWARF2_FLAG_IS_STMT : 0, 0, 0,
+ StringRef());
+ }
+
// If parsing succeeded, match the instruction.
if (!HadError)
HadError = getTargetParser().MatchAndEmitInstruction(IDLoc, ParsedOperands,
@@ -2342,6 +2362,10 @@
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.file' directive");
+ if (getContext().getGenDwarfForAssembly() == true)
+ Error(DirectiveLoc, "input can't have .file dwarf directives when -g is "
+ "used to generate dwarf debug info for assembly code");
+
if (FileNumber == -1)
getStreamer().EmitFileDirective(Filename);
else {