aboutsummaryrefslogtreecommitdiff
path: root/lib/Basic
diff options
context:
space:
mode:
Diffstat (limited to 'lib/Basic')
-rw-r--r--lib/Basic/SourceManager.cpp82
1 files changed, 57 insertions, 25 deletions
diff --git a/lib/Basic/SourceManager.cpp b/lib/Basic/SourceManager.cpp
index f0a0d4c1bb..6335504a7d 100644
--- a/lib/Basic/SourceManager.cpp
+++ b/lib/Basic/SourceManager.cpp
@@ -457,10 +457,11 @@ SourceLocation SourceManager::createInstantiationLoc(SourceLocation SpellingLoc,
}
const llvm::MemoryBuffer *
-SourceManager::getMemoryBufferForFile(const FileEntry *File) {
+SourceManager::getMemoryBufferForFile(const FileEntry *File,
+ bool *Invalid) {
const SrcMgr::ContentCache *IR = getOrCreateContentCache(File);
assert(IR && "getOrCreateContentCache() cannot return NULL");
- return IR->getBuffer(Diag);
+ return IR->getBuffer(Diag, Invalid);
}
bool SourceManager::overrideFileContents(const FileEntry *SourceFile,
@@ -701,21 +702,34 @@ SourceManager::getInstantiationRange(SourceLocation Loc) const {
/// getCharacterData - Return a pointer to the start of the specified location
/// in the appropriate MemoryBuffer.
-const char *SourceManager::getCharacterData(SourceLocation SL) const {
+const char *SourceManager::getCharacterData(SourceLocation SL,
+ bool *Invalid) const {
// Note that this is a hot function in the getSpelling() path, which is
// heavily used by -E mode.
std::pair<FileID, unsigned> LocInfo = getDecomposedSpellingLoc(SL);
// Note that calling 'getBuffer()' may lazily page in a source file.
- return getSLocEntry(LocInfo.first).getFile().getContentCache()
- ->getBuffer(Diag)->getBufferStart() + LocInfo.second;
+ bool CharDataInvalid = false;
+ const llvm::MemoryBuffer *Buffer
+ = getSLocEntry(LocInfo.first).getFile().getContentCache()->getBuffer(Diag,
+ &CharDataInvalid);
+ if (Invalid)
+ *Invalid = CharDataInvalid;
+ return Buffer->getBufferStart() + (CharDataInvalid? 0 : LocInfo.second);
}
/// getColumnNumber - Return the column # for the specified file position.
/// this is significantly cheaper to compute than the line number.
-unsigned SourceManager::getColumnNumber(FileID FID, unsigned FilePos) const {
- const char *Buf = getBuffer(FID)->getBufferStart();
+unsigned SourceManager::getColumnNumber(FileID FID, unsigned FilePos,
+ bool *Invalid) const {
+ bool MyInvalid = false;
+ const char *Buf = getBuffer(FID, &MyInvalid)->getBufferStart();
+ if (Invalid)
+ *Invalid = MyInvalid;
+
+ if (MyInvalid)
+ return 1;
unsigned LineStart = FilePos;
while (LineStart && Buf[LineStart-1] != '\n' && Buf[LineStart-1] != '\r')
@@ -723,27 +737,30 @@ unsigned SourceManager::getColumnNumber(FileID FID, unsigned FilePos) const {
return FilePos-LineStart+1;
}
-unsigned SourceManager::getSpellingColumnNumber(SourceLocation Loc) const {
+unsigned SourceManager::getSpellingColumnNumber(SourceLocation Loc,
+ bool *Invalid) const {
if (Loc.isInvalid()) return 0;
std::pair<FileID, unsigned> LocInfo = getDecomposedSpellingLoc(Loc);
- return getColumnNumber(LocInfo.first, LocInfo.second);
+ return getColumnNumber(LocInfo.first, LocInfo.second, Invalid);
}
-unsigned SourceManager::getInstantiationColumnNumber(SourceLocation Loc) const {
+unsigned SourceManager::getInstantiationColumnNumber(SourceLocation Loc,
+ bool *Invalid) const {
if (Loc.isInvalid()) return 0;
std::pair<FileID, unsigned> LocInfo = getDecomposedInstantiationLoc(Loc);
- return getColumnNumber(LocInfo.first, LocInfo.second);
+ return getColumnNumber(LocInfo.first, LocInfo.second, Invalid);
}
-
-
static DISABLE_INLINE void ComputeLineNumbers(Diagnostic &Diag,
ContentCache* FI,
- llvm::BumpPtrAllocator &Alloc);
+ llvm::BumpPtrAllocator &Alloc,
+ bool &Invalid);
static void ComputeLineNumbers(Diagnostic &Diag, ContentCache* FI,
- llvm::BumpPtrAllocator &Alloc){
+ llvm::BumpPtrAllocator &Alloc, bool &Invalid) {
// Note that calling 'getBuffer()' may lazily page in the file.
- const MemoryBuffer *Buffer = FI->getBuffer(Diag);
+ const MemoryBuffer *Buffer = FI->getBuffer(Diag, &Invalid);
+ if (Invalid)
+ return;
// Find the file offsets of all of the *physical* source lines. This does
// not look at trigraphs, escaped newlines, or anything else tricky.
@@ -789,7 +806,8 @@ static void ComputeLineNumbers(Diagnostic &Diag, ContentCache* FI,
/// for the position indicated. This requires building and caching a table of
/// line offsets for the MemoryBuffer, so this is not cheap: use only when
/// about to emit a diagnostic.
-unsigned SourceManager::getLineNumber(FileID FID, unsigned FilePos) const {
+unsigned SourceManager::getLineNumber(FileID FID, unsigned FilePos,
+ bool *Invalid) const {
ContentCache *Content;
if (LastLineNoFileIDQuery == FID)
Content = LastLineNoContentCache;
@@ -799,8 +817,15 @@ unsigned SourceManager::getLineNumber(FileID FID, unsigned FilePos) const {
// If this is the first use of line information for this buffer, compute the
/// SourceLineCache for it on demand.
- if (Content->SourceLineCache == 0)
- ComputeLineNumbers(Diag, Content, ContentCacheAlloc);
+ if (Content->SourceLineCache == 0) {
+ bool MyInvalid = false;
+ ComputeLineNumbers(Diag, Content, ContentCacheAlloc, MyInvalid);
+ if (Invalid)
+ *Invalid = MyInvalid;
+ if (MyInvalid)
+ return 1;
+ } else if (Invalid)
+ *Invalid = false;
// Okay, we know we have a line number table. Do a binary search to find the
// line number that this character position lands on.
@@ -886,12 +911,14 @@ unsigned SourceManager::getLineNumber(FileID FID, unsigned FilePos) const {
return LineNo;
}
-unsigned SourceManager::getInstantiationLineNumber(SourceLocation Loc) const {
+unsigned SourceManager::getInstantiationLineNumber(SourceLocation Loc,
+ bool *Invalid) const {
if (Loc.isInvalid()) return 0;
std::pair<FileID, unsigned> LocInfo = getDecomposedInstantiationLoc(Loc);
return getLineNumber(LocInfo.first, LocInfo.second);
}
-unsigned SourceManager::getSpellingLineNumber(SourceLocation Loc) const {
+unsigned SourceManager::getSpellingLineNumber(SourceLocation Loc,
+ bool *Invalid) const {
if (Loc.isInvalid()) return 0;
std::pair<FileID, unsigned> LocInfo = getDecomposedSpellingLoc(Loc);
return getLineNumber(LocInfo.first, LocInfo.second);
@@ -931,10 +958,11 @@ SourceManager::getFileCharacteristic(SourceLocation Loc) const {
/// Return the filename or buffer identifier of the buffer the location is in.
/// Note that this name does not respect #line directives. Use getPresumedLoc
/// for normal clients.
-const char *SourceManager::getBufferName(SourceLocation Loc) const {
+const char *SourceManager::getBufferName(SourceLocation Loc,
+ bool *Invalid) const {
if (Loc.isInvalid()) return "<invalid loc>";
- return getBuffer(getFileID(Loc))->getBufferIdentifier();
+ return getBuffer(getFileID(Loc), Invalid)->getBufferIdentifier();
}
@@ -1014,8 +1042,12 @@ SourceLocation SourceManager::getLocation(const FileEntry *SourceFile,
// If this is the first use of line information for this buffer, compute the
/// SourceLineCache for it on demand.
- if (Content->SourceLineCache == 0)
- ComputeLineNumbers(Diag, Content, ContentCacheAlloc);
+ if (Content->SourceLineCache == 0) {
+ bool MyInvalid = false;
+ ComputeLineNumbers(Diag, Content, ContentCacheAlloc, MyInvalid);
+ if (MyInvalid)
+ return SourceLocation();
+ }
// Find the first file ID that corresponds to the given file.
FileID FirstFID;
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2025-05-04 15:05:30 +0000