[cfe-commits] r94794 - in /cfe/trunk: include/clang/Analysis/Analyses/PrintfFormatString.h include/clang/Basic/DiagnosticSemaKinds.td lib/Analysis/PrintfFormatString.cpp lib/Sema/SemaChecking.cpp
Ted Kremenek
kremenek at apple.com
Thu Jan 28 19:16:21 PST 2010
Author: kremenek
Date: Thu Jan 28 21:16:21 2010
New Revision: 94794
URL: http://llvm.org/viewvc/llvm-project?rev=94794&view=rev
Log:
Alternate format string checking: issue warnings for incomplete format specifiers.
In addition, move ParseFormatString() and FormatStringHandler() from
the clang::analyze_printf to the clang namespace. Hopefully this will
resolve some link errors on Linux.
Modified:
cfe/trunk/include/clang/Analysis/Analyses/PrintfFormatString.h
cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
cfe/trunk/lib/Analysis/PrintfFormatString.cpp
cfe/trunk/lib/Sema/SemaChecking.cpp
Modified: cfe/trunk/include/clang/Analysis/Analyses/PrintfFormatString.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Analysis/Analyses/PrintfFormatString.h?rev=94794&r1=94793&r2=94794&view=diff
==============================================================================
--- cfe/trunk/include/clang/Analysis/Analyses/PrintfFormatString.h (original)
+++ cfe/trunk/include/clang/Analysis/Analyses/PrintfFormatString.h Thu Jan 28 21:16:21 2010
@@ -74,6 +74,11 @@
bool isUIntArg() const { return kind >= oArg && kind <= XArg; }
bool isDoubleArg() const { return kind >= fArg && kind <= AArg; }
Kind getKind() const { return kind; }
+ unsigned getLength() const {
+ // Conversion specifiers currently only are represented by
+ // single characters, but we be flexible.
+ return 1;
+ }
private:
const char *Position;
@@ -187,24 +192,24 @@
bool hasLeadingZeros() const { return flags & LeadingZeroes; }
};
-
+} // end printf namespace
+
class FormatStringHandler {
public:
FormatStringHandler() {}
virtual ~FormatStringHandler();
virtual void HandleIncompleteFormatSpecifier(const char *startSpecifier,
- const char *endSpecifier) {}
+ unsigned specifierLen) {}
virtual void HandleNullChar(const char *nullCharacter) {}
+
+ virtual void
+ HandleInvalidConversionSpecifier(const analyze_printf::FormatSpecifier &FS,
+ const char *startSpecifier,
+ unsigned specifierLen) {}
- virtual void HandleIncompletePrecision(const char *periodChar) {}
-
- virtual void HandleInvalidConversionSpecifier(const FormatSpecifier &FS,
- const char *startSpecifier,
- unsigned specifierLen) {}
-
- virtual bool HandleFormatSpecifier(const FormatSpecifier &FS,
+ virtual bool HandleFormatSpecifier(const analyze_printf::FormatSpecifier &FS,
const char *startSpecifier,
unsigned specifierLen) {
return true;
@@ -215,6 +220,5 @@
const char *beg, const char *end);
-} // end printf namespace
} // end clang namespace
#endif
Modified: cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td?rev=94794&r1=94793&r2=94794&view=diff
==============================================================================
--- cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td (original)
+++ cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td Thu Jan 28 21:16:21 2010
@@ -2445,6 +2445,8 @@
"more data arguments than '%%' conversions">, InGroup<FormatExtraArgs>;
def warn_printf_invalid_conversion : Warning<
"invalid conversion '%0'">, InGroup<Format>;
+def warn_printf_incomplete_specifier : Warning<
+ "incomplete format specifier '%0'">, InGroup<Format>;
def warn_printf_missing_format_string : Warning<
"format string missing">, InGroup<Format>;
def warn_null_arg : Warning<
Modified: cfe/trunk/lib/Analysis/PrintfFormatString.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Analysis/PrintfFormatString.cpp?rev=94794&r1=94793&r2=94794&view=diff
==============================================================================
--- cfe/trunk/lib/Analysis/PrintfFormatString.cpp (original)
+++ cfe/trunk/lib/Analysis/PrintfFormatString.cpp Thu Jan 28 21:16:21 2010
@@ -16,6 +16,7 @@
using clang::analyze_printf::FormatSpecifier;
using clang::analyze_printf::OptionalAmount;
+using namespace clang;
namespace {
class FormatSpecifierResult {
@@ -83,9 +84,8 @@
return OptionalAmount();
}
-static FormatSpecifierResult
-ParseFormatSpecifier(clang::analyze_printf::FormatStringHandler &H,
- const char *&Beg, const char *E) {
+static FormatSpecifierResult ParseFormatSpecifier(FormatStringHandler &H,
+ const char *&Beg, const char *E) {
using namespace clang::analyze_printf;
@@ -113,7 +113,7 @@
if (I == E) {
// No more characters left?
- H.HandleIncompleteFormatSpecifier(Start, E);
+ H.HandleIncompleteFormatSpecifier(Start, E - Start);
return true;
}
@@ -136,7 +136,7 @@
if (I == E) {
// No more characters left?
- H.HandleIncompleteFormatSpecifier(Start, E);
+ H.HandleIncompleteFormatSpecifier(Start, E - Start);
return true;
}
@@ -145,15 +145,15 @@
if (I == E) {
// No more characters left?
- H.HandleIncompleteFormatSpecifier(Start, E);
+ H.HandleIncompleteFormatSpecifier(Start, E - Start);
return true;
}
// Look for the precision (if any).
if (*I == '.') {
- const char *startPrecision = I++;
+ ++I;
if (I == E) {
- H.HandleIncompletePrecision(I - 1);
+ H.HandleIncompleteFormatSpecifier(Start, E - Start);
return true;
}
@@ -161,7 +161,7 @@
if (I == E) {
// No more characters left?
- H.HandleIncompletePrecision(startPrecision);
+ H.HandleIncompleteFormatSpecifier(Start, E - Start);
return true;
}
}
@@ -188,7 +188,7 @@
if (I == E) {
// No more characters left?
- H.HandleIncompleteFormatSpecifier(Start, E);
+ H.HandleIncompleteFormatSpecifier(Start, E - Start);
return true;
}
@@ -230,8 +230,7 @@
return FormatSpecifierResult(Start, FS);
}
-namespace clang { namespace analyze_printf {
-bool ParseFormatString(FormatStringHandler &H,
+bool clang::ParseFormatString(FormatStringHandler &H,
const char *I, const char *E) {
// Keep looking for a format specifier until we have exhausted the string.
while (I != E) {
@@ -254,4 +253,3 @@
}
FormatStringHandler::~FormatStringHandler() {}
-}} // end namespace clang::analyze_printf
Modified: cfe/trunk/lib/Sema/SemaChecking.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaChecking.cpp?rev=94794&r1=94793&r2=94794&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaChecking.cpp (original)
+++ cfe/trunk/lib/Sema/SemaChecking.cpp Thu Jan 28 21:16:21 2010
@@ -1282,7 +1282,7 @@
namespace {
-class CheckPrintfHandler : public analyze_printf::FormatStringHandler {
+class CheckPrintfHandler : public FormatStringHandler {
Sema &S;
const StringLiteral *FExpr;
const Expr *OrigFormatExpr;
@@ -1306,11 +1306,9 @@
TheCall(theCall), FormatIdx(formatIdx) {}
void DoneProcessing();
-
-// void HandleIncompleteFormatSpecifier(const char *startSpecifier,
-// const char *endSpecifier);
-
-// void HandleIncompletePrecision(const char *periodChar);
+
+ void HandleIncompleteFormatSpecifier(const char *startSpecifier,
+ unsigned specifierLen);
void HandleInvalidConversionSpecifier(const analyze_printf::FormatSpecifier &FS,
const char *startSpecifier,
@@ -1341,16 +1339,25 @@
}
void CheckPrintfHandler::
+HandleIncompleteFormatSpecifier(const char *startSpecifier,
+ unsigned specifierLen) {
+ SourceLocation Loc = getLocationOfByte(startSpecifier);
+ S.Diag(Loc, diag::warn_printf_incomplete_specifier)
+ << llvm::StringRef(startSpecifier, specifierLen)
+ << getFormatRange();
+}
+
+void CheckPrintfHandler::
HandleInvalidConversionSpecifier(const analyze_printf::FormatSpecifier &FS,
const char *startSpecifier,
unsigned specifierLen) {
++NumConversions;
-
- SourceLocation Loc =
- getLocationOfByte(FS.getConversionSpecifier().getStart());
+ const analyze_printf::ConversionSpecifier &CS =
+ FS.getConversionSpecifier();
+ SourceLocation Loc = getLocationOfByte(CS.getStart());
S.Diag(Loc, diag::warn_printf_invalid_conversion)
- << llvm::StringRef(startSpecifier, specifierLen)
+ << llvm::StringRef(CS.getStart(), CS.getLength())
<< getFormatRange();
}
@@ -1495,8 +1502,8 @@
isa<ObjCStringLiteral>(OrigFormatExpr), Str,
HasVAListArg, TheCall, format_idx);
- analyze_printf::ParseFormatString(H, Str, Str + StrLen);
- H.DoneProcessing();
+ if (!ParseFormatString(H, Str, Str + StrLen))
+ H.DoneProcessing();
}
//===--- CHECK: Return Address of Stack Variable --------------------------===//
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