[cfe-dev] SourceManager.getFilename() fails to return the name of header file

[Frank Redeker via cfe-dev]

Am 06.12.2016 um 12:32 schrieb Alex L:
> I think that you should be able to get the presumed filename by using
> `SourceManager::getPresumedLoc`, e.g.:
> 
> PresumedLoc PLoc = manager.getPresumedLoc(location);
> if (PLoc.isValid()) {
>   Filename = PLoc.getFilename();
> }
> 
Many thanks Alex, works great for me!


Frank


> On 6 December 2016 at 11:16, Frank Redeker via cfe-dev
> <cfe-dev at lists.llvm.org <mailto:cfe-dev at lists.llvm.org>> wrote:
> 
>     Hello list,
> 
>     I am writing a tool to analyze C/C++ code written for a compiler for
>     MCUs (e.g. a compiler from IAR Systems, Windriver, Cosmic, Keil)
> 
>     To create the input file for my analyzer I have to use the compilers
>     preprocessor to handle the compiler specific command line options. The
>     result of this step is an output file like this.
> 
>     # 1 "T://source.c"
>     # 1 "D:\\Program_Files_32\\Windriver\\diab\\5.9.4.2\\include\\math.h" 1
>     # 1
>     "D:\\Program_Files_32\\Windriver\\diab\\5.9.4.2\\include\\xmacros.h" 1
>     # 1
>     "D:\\Program_Files_32\\Windriver\\diab\\5.9.4.2\\include\\diab/xmacros.h"
>     1
>     .
>     .
>     # 4
>     "D:\\Program_Files_32\\Windriver\\diab\\5.9.4.2\\include\\xmacros.h" 1
>     # 4 "D:\\Program_Files_32\\Windriver\\diab\\5.9.4.2\\include\\math.h" 1
>     .
>     .
>     extern long double double cosl_not_supported(void);
> 
>     inline long double cosl(long double)
>             {
>             return ( long_double_cosl_not_supported() );
>             }
>     .
>     .
>     # 3 "T://source.c"
> 
>     int foo () {
>             return 1;
>     }
> 
> 
>     Inside my AST visitor if have a function like this that gets a
>     FunctionDecl:
> 
>     void handleFunctionDecl (const * FunctionDecl) {
>     }
> 
>     To check if the declaration is inside a system header I use the
>     following code which works as expected:
> 
>     ASTContext &    context(decl->getASTContext());
>     FullSourceLoc   location(context.getFullLoc(decl->getLocStart()));
>     bool            in_system_header(false);
> 
>     if (location.isValid()) {
>        in_system_header = location.isInSystemHeader();
>     }
> 
> 
>     I also want to know the header file from wich the declaration comes and
>     tried the following:
> 
>     ASTContext &      context(decl->getASTContext());
>     SourceManager &   manager(context.getSourceManager());
>     SourceLocation    location(decl->getLocStart());
> 
>     But `manager.getFilename(location)` always returns the name of the main
>     file.
>