pyinject.gdb: GDB commands to inspect Python processes by injecting/running Python code

pyinject.gdb

+# pyinject.gdb provides GDB commands to inject code into Python processes.
+# see also: https://pyrasite.readthedocs.io/
+
+# xpyrun "<code>" runs python <code>.
+define xpyrun
+    set $_gstate = (int)PyGILState_Ensure()
+    set $_unused_int  = (int)PyRun_SimpleString($arg0)
+    set $_unused_void = (void)PyGILState_Release($_gstate)
+end
+
+# xpybt prints python-level backtrace to program stdout.
+define xpybt
+    xpyrun "import traceback; traceback.print_stack()"
+end
+
+# xpymemtop prints top py-memory usage to program stdout.
+define xpymemtop
+    xpyrun "import objgraph; objgraph.show_most_common_types()"
+end
+
+# vim: ft=gdb