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Fix for PR14264 cause by commit r167237 which did not take into account a

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possible buffer change with a .macro directive.

rdar://12637628


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167408 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Kevin Enderby 2012-11-05 21:55:41 +00:00
parent 7895353b75
commit 32c1a82a6b
2 changed files with 20 additions and 1 deletions
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4
lib/MC/MCParser/AsmParser.cpp
View File

@ -154,6 +154,7 @@ private:
StringRef CppHashFilename;
int64_t CppHashLineNumber;
SMLoc CppHashLoc;
int CppHashBuf;
/// AssemblerDialect. ~OU means unset value and use value provided by MAI.
unsigned AssemblerDialect;
@ -1403,7 +1404,7 @@ bool AsmParser::ParseStatement(ParseStatementInfo &Info) {
getStreamer().EmitDwarfFileDirective(
getContext().nextGenDwarfFileNumber(), StringRef(), CppHashFilename);
unsigned CppHashLocLineNo = SrcMgr.FindLineNumber(CppHashLoc, CurBuffer);
unsigned CppHashLocLineNo = SrcMgr.FindLineNumber(CppHashLoc,CppHashBuf);
Line = CppHashLineNumber - 1 + (Line - CppHashLocLineNo);
}
@ -1465,6 +1466,7 @@ bool AsmParser::ParseCppHashLineFilenameComment(const SMLoc &L) {
CppHashLoc = L;
CppHashFilename = Filename;
CppHashLineNumber = LineNumber;
CppHashBuf = CurBuffer;
// Ignore any trailing characters, they're just comment.
EatToEndOfLine();

17
test/MC/MachO/gen-dwarf-macro-cpp.s Normal file
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@ -0,0 +1,17 @@
// RUN: llvm-mc -g -triple i386-apple-darwin10 %s -filetype=obj -o %t
// RUN: llvm-dwarfdump %t | FileCheck %s
# 1 "foo.S" 2
.macro switcher
ljmp *0x38(%ecx)
.endmacro
switcher NaClSwitchNoSSE, 0
// PR14264 was a crash in the code caused by the .macro not handled correctly
// rdar://12637628
// We check that the source name "foo.S" is picked up
// CHECK: Dir Mod Time File Len File Name
// CHECK: ---- ---------- ---------- ---------------------------
// CHECK: file_names[ 1] 1 0x00000000 0x00000000 gen-dwarf-macro-cpp.s
// CHECK: file_names[ 2] 0 0x00000000 0x00000000 foo.S