clang 3.8-如何阻止clang创建系统标头的AST？

Question

I recently started using using Clang 3.8 on Fedora 22 machine to make a tool which parses the clang AST and extracts some information from AST nodes. The tool is expected to read in C,C++, and SystemC files.

When I read a file and dump the AST using my tool, it shows me the AST for the system headers as well.

Hence my question: How can I ask my tool not to display the AST of system headers? Because i will be modifying the files and I am afraid that system headers will create an overhead.

PS. I have already tried isInSystemHeader() function, but it is not helpful. Because the parser just keeps digging in the system headers and at some point generates the error. The error is

"/llvm/tools/clang/lib/Basic/SourceLocation.cpp:117: bool clang::FullSourceLoc::isInSystemHeader() const: Assertion `isValid()' failed.

Aborted (core dumped)"

Pointers to solution, or solutions will be highly appreciated :) Thanks.

Answer 1

try:

FullSourceLoc fullSourceLoc(decl->getLocation(), astContext.getSourceManager());
if (fullSourceLoc.isValid() && !fullSourceLoc.isInSystemHeader()) {
     // system header excluded here
}