Preliminary debug support for Cython

added the --pyrex-debug flag to Cython's build_ext
added the pyrex_debug boolean to Cython's Cython.Distutils.extension.Extension
    (for per-module debugging information)
debug output is written to the cython_debug directory
bin/cygdb is included (start this from the build directory)
    working commands: cy import, cy locals, cy break
when debugging is active, export all functions as extern

1 files changed, 53 insertions, 0 deletions

diff --git a/bin/cygdb b/bin/cygdb
new file mode 100755
index 000000000..227d5545b
--- /dev/null
+++ b/bin/cygdb
@@ -0,0 +1,53 @@
+#!/usr/bin/env python
+
+"""
+The Cython debugger
+
+The current directory should contain a directory named 'cython_debug', or a
+path to the cython project directory should be given (the parent directory of
+cython_debug).
+"""
+
+import os
+import sys
+import glob
+import tempfile
+import subprocess
+
+def main(import_libpython=False, path_to_debug_info=os.curdir):
+    """
+    Start the Cython debugger. This tells gdb to import the Cython and Python
+    extensions (libpython.py and libcython.py) and it enables gdb's pending 
+    breakpoints
+    """
+    debug_files = glob.glob(
+        os.path.join(os.curdir, 'cython_debug/cython_debug_info_*'))
+
+    if not debug_files:
+        sys.exit('No debug files were found in the current directory. '
+                 'Aborting.')
+        
+    fd, tempfilename = tempfile.mkstemp()
+    f = os.fdopen(fd, 'w')
+    f.write('set breakpoint pending on\n')
+    f.write('python from Cython.Debugger import libcython\n')
+    if import_libpython:
+        f.write('python import libpython')
+    else:
+        f.write('python from Cython.Debugger import libpython\n')
+    f.write('\n'.join('cy import %s\n' % fn for fn in debug_files))
+    f.close()
+    
+    p = subprocess.Popen(['gdb', '-command', tempfilename])
+    while True:
+        try:
+            p.wait()
+        except KeyboardInterrupt:
+            pass
+        else:
+            break
+    os.remove(tempfilename)
+
+
+if __name__ == '__main__':
+    main()
\ No newline at end of file