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Do not show macro expansion in strncat warnings, which can be defined as 

a builtin.

llvm-svn: 149657
This commit is contained in:
Anna Zaks 2012-02-03 01:27:37 +00:00
parent 60b4f13c11
commit 5069aa33b9
2 changed files with 28 additions and 8 deletions
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23
clang/lib/Sema/SemaChecking.cpp
View File

@ -2742,12 +2742,22 @@ void Sema::CheckStrncatArguments(const CallExpr *CE,
if (PatternType == 0)
return;
// Generate the diagnostic.
SourceLocation SL = LenArg->getLocStart();
SourceRange SR = LenArg->getSourceRange();
SourceManager &SM = PP.getSourceManager();
// If the function is defined as a builtin macro, do not show macro expansion.
if (SM.isMacroArgExpansion(SL)) {
SL = SM.getSpellingLoc(SL);
SR = SourceRange(SM.getSpellingLoc(SR.getBegin()),
SM.getSpellingLoc(SR.getEnd()));
}
if (PatternType == 1)
Diag(DstArg->getLocStart(), diag::warn_strncat_large_size)
<< LenArg->getSourceRange();
Diag(SL, diag::warn_strncat_large_size) << SR;
else
Diag(DstArg->getLocStart(), diag::warn_strncat_src_size)
<< LenArg->getSourceRange();
Diag(SL, diag::warn_strncat_src_size) << SR;
// Output a FIXIT hint if the destination is an array (rather than a
// pointer to an array). This could be enhanced to handle some
@ -2773,9 +2783,8 @@ void Sema::CheckStrncatArguments(const CallExpr *CE,
DstArg->printPretty(OS, Context, 0, getPrintingPolicy());
OS << ") - 1";
Diag(LenArg->getLocStart(), diag::note_strncat_wrong_size)
<< FixItHint::CreateReplacement(LenArg->getSourceRange(),
OS.str());
Diag(SL, diag::note_strncat_wrong_size)
<< FixItHint::CreateReplacement(SR, OS.str());
}
//===--- CHECK: Return Address of Stack Variable --------------------------===//

13
clang/test/Sema/warn-strncat-size.c
View File

@ -1,9 +1,20 @@
// RUN: %clang_cc1 -Wstrncat-size -verify -fsyntax-only %s
// RUN: %clang_cc1 -DUSE_BUILTINS -Wstrncat-size -verify -fsyntax-only %s
// RUN: %clang_cc1 -fsyntax-only -Wstrncat-size -fixit -x c %s
// RUN: %clang_cc1 -DUSE_BUILTINS -fsyntax-only -Wstrncat-size -fixit -x c %s
typedef __SIZE_TYPE__ size_t;
char *strncat(char *, const char *, size_t);
size_t strlen (const char *s);
#ifdef USE_BUILTINS
# define BUILTIN(f) __builtin_ ## f
#else
# define BUILTIN(f) f
#endif
#define strncat BUILTIN(strncat)
char *strncat(char *restrict s1, const char *restrict s2, size_t n);
struct {
char f1[100];
char f2[100][3];