Will C++ exceptions safely propagate through C code?

Question

I have a C++ application that calls SQLite's (SQLite is in C) sqlite3_exec() which in turn can call my callback function implemented in C++. SQLite is compiled into a static library.

If an exception escapes my callback will it propagate safely through the C code of SQLite to the C++ code calling sqlite3_exec()?

Answer 1

My guess is that this is compiler dependent. However, throwing an exception in the callback would be a very bad idea. Either it will flat-out not work, or the C code in the SQLite library will be unable to handle it. Consider if this is some code in SQLite:

{
  char * p = malloc( 1000 );
  ...
  call_the_callback();  // might throw an exception
  ...
  free( p );
}

If the exception "works", the C code has no possible way of catching it, and p will never be freed. The same goes for any other resources the library may have allocated, of course.