https://github.com/python/cpython/commit/0563890872b3c63f94953e983fe396615b708540
commit: 0563890872b3c63f94953e983fe396615b708540
branch: main
author: ivonastojanovic <[email protected]>
committer: pablogsal <[email protected]>
date: 2026-05-24T14:12:05+01:00
summary:
gh-149619: Fix `_remote_debugging` permissions error on Linux (#150012)
When running profiling on Linux without sudo, attempts to read
process memory would fail with the misleading error 'Failed to find
the PyRuntime section in process <pid> on Linux platform'.
The actual issue is a permissions error because profiling was not
run with sudo. We were clearing the exception on Linux when trying
to read memory, instead, we should bubble up the permissions error
and show it properly.
files:
M Python/remote_debug.h
diff --git a/Python/remote_debug.h b/Python/remote_debug.h
index 7b2c4f3bcb8077..53bbd571ad3cef 100644
--- a/Python/remote_debug.h
+++ b/Python/remote_debug.h
@@ -170,7 +170,9 @@ _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t
*handle, uintptr_t address
}
char buf[sizeof(_Py_Debug_Cookie) - 1];
if (_Py_RemoteDebug_ReadRemoteMemory(handle, address, sizeof(buf), buf) !=
0) {
- PyErr_Clear();
+ if (!PyErr_ExceptionMatches(PyExc_PermissionError)) {
+ PyErr_Clear();
+ }
return 0;
}
return memcmp(buf, _Py_Debug_Cookie, sizeof(buf)) == 0;
@@ -785,6 +787,10 @@ search_linux_map_for_section(proc_handle_t *handle, const
char* secname, const c
}
if (strstr(filename, substr)) {
+ if (PyErr_ExceptionMatches(PyExc_PermissionError)) {
+ retval = 0;
+ break;
+ }
PyErr_Clear();
retval = search_elf_file_for_section(handle, secname, start, path);
if (retval
@@ -960,12 +966,14 @@ _Py_RemoteDebug_GetPyRuntimeAddress(proc_handle_t* handle)
address = search_linux_map_for_section(handle, "PyRuntime", "python",
_Py_RemoteDebug_ValidatePyRuntimeCookie);
if (address == 0) {
- // Error out: 'python' substring covers both executable and DLL
- PyObject *exc = PyErr_GetRaisedException();
- PyErr_Format(PyExc_RuntimeError,
- "Failed to find the PyRuntime section in process %d on Linux
platform",
- handle->pid);
- _PyErr_ChainExceptions1(exc);
+ if (!PyErr_ExceptionMatches(PyExc_PermissionError)) {
+ // Error out: 'python' substring covers both executable and DLL
+ PyObject *exc = PyErr_GetRaisedException();
+ PyErr_Format(PyExc_RuntimeError,
+ "Failed to find the PyRuntime section in process %d on Linux
platform",
+ handle->pid);
+ _PyErr_ChainExceptions1(exc);
+ }
}
#elif defined(__APPLE__) && defined(TARGET_OS_OSX) && TARGET_OS_OSX
// On macOS, try libpython first, then fall back to python
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