libbacktrace does not include the origin library in its description.

[Febbe]

Would it be possible, to add afunction to get the origin library in case of a function in a dynamic library?
Taking the gcc implementation for example, which uses libbacktrace internally, it currently prints something like:

0# crashHandler at /mnt/c/Users/Febbe/workspace/xournalpp/src/core/control/CrashHandler.cpp:76
   1#      at :0
   2# pthread_kill at :0
   3# raise at :0
   4# MainWindow::MainWindow(GladeSearchpath*, Control*, _GtkApplication*) at /mnt/c/Users/Febbe/workspace/xournalpp/src/core/gui/MainWindow.cpp:54
   5# std::_MakeUniq<MainWindow>::__single_object std::make_unique<MainWindow, GladeSearchpath*, Control*, _GtkApplication*>(GladeSearchpath*&&, Control*&&, _GtkApplication*&&) at :0
   6# on_startup at /mnt/c/Users/Febbe/workspace/xournalpp/src/core/control/XournalMain.cpp:485
   7# g_closure_invoke at :0
   8#      at :0
   9# g_signal_emit_valist at :0
  10# g_signal_emit at :0
  11# g_application_register at :0
  12#      at :0
  13# g_application_run at :0
  14# XournalMain::run(int, char**) at /mnt/c/Users/Febbe/workspace/xournalpp/src/core/control/XournalMain.cpp:690

Note the at :0 in case of missing debug symbols.
That results from a call to backtrace_pcinfo which only return the function name, line number and filename.

In any case I would expect to have the originating library path or at least the name in that line instead of nothing.

Since alternating, the API is not a feasible solution, a function to retrieve the so information from the pc would be useful.
Like

typedef int (*backtrace_so_callback) (void *data, uintptr_t pc,
					const char *sofilename);

extern int backtrace_pcsoinfo (struct backtrace_state *state, uintptr_t pc,
			     backtrace_so_callback callback,
			     backtrace_error_callback error_callback,
			     void *data);`

or

typedef int (*backtrace_pc_verbose_callback) (void *data, uintptr_t pc,
					const char *sofilename, const char *filename, int lineno,
					const char *function);

extern int backtrace_pc_verbose (struct backtrace_state *state, uintptr_t pc,
			     backtrace_pc_verbose_callback callback,
			     backtrace_error_callback error_callback,
			     void *data);`

My current solution is to call dladdr1 to retrieve the so information. But this is not platform independent, I suppose.