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Is it possible to debug an llvm pass using gdb? I couldn't find any docs on the llvm site.
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l command: Use gdb command l or list to print the source code in the debug mode. Use l line-number to view a specific line number (or) l function to view a specific function. bt: backtrack – Print backtrace of all stack frames, or innermost COUNT frames. help – View help for a particular gdb topic — help TOPICNAME.
You can use GDB or lldb with clang.
In brief, LLDB and GDB are two debuggers. The main difference between LLDB and GDB is that in LLDB, the programmer can debug programs written in C, Objective C and C++ while, in GDB, the programmer can debug programs written in Ada, C, C++, Objective C, Pascal, FORTRAN and Go.
The standard LLDB installation provides you with an extensive set of commands designed to be compatible with familiar GDB commands. In addition to using the standard configuration, you can easily customize LLDB to suit your needs. Both GDB and LLDB are of course excellent debuggers without doubt.
Yes. Build LLVM in non-release mode (the default). It takes a bit longer than a release build, but you can use gdb to debug the resulting object file.
One note of caution: I had to upgrade my Linux box to 3GB of memory to make LLVM debug mode link times reasonable.
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