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Add support for analyzing FreeBSD kernel printf extensions.

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This adds a new __freebsd_kprintf__ format string type, which enables
checking when used in __attribute__((format(...))) attributes.  It can
check the FreeBSD kernel specific %b, %D, %r and %y specifiers, using
existing diagnostic messages.  Also adds test cases for all these
specifiers.

Differential Revision: http://reviews.llvm.org/D7154

llvm-svn: 229921
This commit is contained in:
Dimitry Andric
2015-02-19 22:32:33 +00:00
parent f567e1aab7
commit 6b5ed34a40
8 changed files with 154 additions and 9 deletions
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16
clang/lib/Analysis/FormatString.cpp
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@@ -552,6 +552,12 @@ const char *ConversionSpecifier::toString() const {
// Objective-C specific specifiers.
case ObjCObjArg: return "@";
// FreeBSD kernel specific specifiers.
case FreeBSDbArg: return "b";
case FreeBSDDArg: return "D";
case FreeBSDrArg: return "r";
case FreeBSDyArg: return "y";
// GlibC specific specifiers.
case PrintErrno: return "m";
@@ -647,6 +653,9 @@ bool FormatSpecifier::hasValidLengthModifier(const TargetInfo &Target) const {
case ConversionSpecifier::XArg:
case ConversionSpecifier::nArg:
return true;
case ConversionSpecifier::FreeBSDrArg:
case ConversionSpecifier::FreeBSDyArg:
return Target.getTriple().isOSFreeBSD();
default:
return false;
}
@@ -677,6 +686,9 @@ bool FormatSpecifier::hasValidLengthModifier(const TargetInfo &Target) const {
case ConversionSpecifier::ScanListArg:
case ConversionSpecifier::ZArg:
return true;
case ConversionSpecifier::FreeBSDrArg:
case ConversionSpecifier::FreeBSDyArg:
return Target.getTriple().isOSFreeBSD();
default:
return false;
}
@@ -807,6 +819,10 @@ bool FormatSpecifier::hasStandardConversionSpecifier(const LangOptions &LangOpt)
case ConversionSpecifier::SArg:
return LangOpt.ObjC1 || LangOpt.ObjC2;
case ConversionSpecifier::InvalidSpecifier:
case ConversionSpecifier::FreeBSDbArg:
case ConversionSpecifier::FreeBSDDArg:
case ConversionSpecifier::FreeBSDrArg:
case ConversionSpecifier::FreeBSDyArg:
case ConversionSpecifier::PrintErrno:
case ConversionSpecifier::DArg:
case ConversionSpecifier::OArg: