Merge upstream/main into file-output

Merged changes from upstream/main including: - Subprocess enumeration functionality (get_child_pids, is_python_process) - Various fixes and improvements Combined with file-output branch features: - Binary I/O writer and reader for profiling data - Binary format export/replay support 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
pablogsal · Dec 22, 2025 · Dec 15, 2025 · Dec 15, 2025 · Dec 15, 2025 · Dec 15, 2025
commit b90e37c945d3b124cb57fac3e2ccd74c96c24cc0
@@ -562,7 +562,12 @@ def _handle_output(collector, args, pid, mode):
                 sort_mode, limit, not args.no_summary, mode
             )
     else:
-        filename = args.outfile or _generate_output_filename(args.format, pid)
+        # Export to file
+        if args.outfile and os.path.isdir(args.outfile):
+            # If outfile is a directory, generate filename inside it
+            filename = os.path.join(args.outfile, _generate_output_filename(args.format, pid))
+        else:
+            filename = args.outfile or _generate_output_filename(args.format, pid)
         collector.export(filename)
 
 

@@ -41,7 +41,7 @@
 @MODULE__PICKLE_TRUE@_pickle _pickle.c
 @MODULE__QUEUE_TRUE@_queue _queuemodule.c
 @MODULE__RANDOM_TRUE@_random _randommodule.c
-@MODULE__REMOTE_DEBUGGING_TRUE@_remote_debugging _remote_debugging/module.c _remote_debugging/object_reading.c _remote_debugging/code_objects.c _remote_debugging/frames.c _remote_debugging/frame_cache.c _remote_debugging/threads.c _remote_debugging/asyncio.c _remote_debugging/binary_io_writer.c _remote_debugging/binary_io_reader.c
+@MODULE__REMOTE_DEBUGGING_TRUE@_remote_debugging _remote_debugging/module.c _remote_debugging/object_reading.c _remote_debugging/code_objects.c _remote_debugging/frames.c _remote_debugging/frame_cache.c _remote_debugging/threads.c _remote_debugging/asyncio.c _remote_debugging/binary_io_writer.c _remote_debugging/binary_io_reader.c _remote_debugging/subprocess.c
 @MODULE__STRUCT_TRUE@_struct _struct.c
 
 # build supports subinterpreters

@@ -15,10 +15,6 @@
 extern "C" {
 #endif
 
-#ifndef _GNU_SOURCE
-#define _GNU_SOURCE
-#endif
-
 #ifndef Py_BUILD_CORE_BUILTIN
 #  ifndef Py_BUILD_CORE_MODULE
 #    define Py_BUILD_CORE_MODULE 1

diff --git a/Modules/_remote_debugging/clinic/module.c.h b/Modules/_remote_debugging/clinic/module.c.h
@@ -1647,8 +1647,75 @@ _remote_debugging_zstd_available_impl(PyObject *module)
     return PyBool_FromLong(binary_io_zstd_available());
 }
 
+/* ============================================================================
+ * MODULE-LEVEL FUNCTIONS
+ * ============================================================================ */
+
+/*[clinic input]
+_remote_debugging.get_child_pids
+
+    pid: int
+        Process ID of the parent process
+    *
+    recursive: bool = True
+        If True, return all descendants (children, grandchildren, etc.).
+        If False, return only direct children.
+
+Get all child process IDs of the given process.
+
+Returns a list of child process IDs. Returns an empty list if no children
+are found.
+
+This function provides a snapshot of child processes at a moment in time.
+Child processes may exit or new ones may be created after the list is returned.
+
+Raises:
+    OSError: If unable to enumerate processes
+    NotImplementedError: If not supported on this platform
+[clinic start generated code]*/
+
+static PyObject *
+_remote_debugging_get_child_pids_impl(PyObject *module, int pid,
+                                      int recursive)
+/*[clinic end generated code: output=1ae2289c6b953e4b input=3395cbe7f17066c9]*/
+{
+    return enumerate_child_pids((pid_t)pid, recursive);
+}
+
+/*[clinic input]
+_remote_debugging.is_python_process
+
+    pid: int
+
+Check if a process is a Python process.
+[clinic start generated code]*/
+
+static PyObject *
+_remote_debugging_is_python_process_impl(PyObject *module, int pid)
+/*[clinic end generated code: output=22947dc8afcac362 input=13488e28c7295d84]*/
+{
+    proc_handle_t handle;
+
+    if (_Py_RemoteDebug_InitProcHandle(&handle, pid) < 0) {
+        PyErr_Clear();
+        Py_RETURN_FALSE;
+    }
+
+    uintptr_t runtime_start_address = _Py_RemoteDebug_GetPyRuntimeAddress(&handle);
+    _Py_RemoteDebug_CleanupProcHandle(&handle);
+
+    if (runtime_start_address == 0) {
+        PyErr_Clear();
+        Py_RETURN_FALSE;
+    }
+
+    Py_RETURN_TRUE;
+}
+
 static PyMethodDef remote_debugging_methods[] = {
     _REMOTE_DEBUGGING_ZSTD_AVAILABLE_METHODDEF
+    _REMOTE_DEBUGGING_GET_CHILD_PIDS_METHODDEF
+    _REMOTE_DEBUGGING_IS_PYTHON_PROCESS_METHODDEF
     {NULL, NULL, 0, NULL},
 };
 

@@ -107,6 +107,7 @@
     <ClCompile Include="..\Modules\_remote_debugging\asyncio.c" />
     <ClCompile Include="..\Modules\_remote_debugging\binary_io_writer.c" />
     <ClCompile Include="..\Modules\_remote_debugging\binary_io_reader.c" />
+    <ClCompile Include="..\Modules\_remote_debugging\subprocess.c" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\Modules\_remote_debugging\_remote_debugging.h" />

@@ -39,6 +39,9 @@
     <ClCompile Include="..\Modules\_remote_debugging\binary_io_reader.c">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="..\Modules\_remote_debugging\subprocess.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\Modules\_remote_debugging\_remote_debugging.h">