bpo-42923: Py_FatalError() avoids fprintf() (GH-24242)

* Replace buffered fprintf() with unbuffered _Py_write_noraise()
  in Py_FatalError().
* _Py_DumpHexadecimal() now accepts uintptr_t.

1 files changed, 4 insertions, 7 deletions

diff --git a/Python/traceback.c b/Python/traceback.c
index b82cfd3..bd5fd35 100644
--- a/Python/traceback.c
+++ b/Python/traceback.c
@@ -649,15 +649,12 @@ _Py_DumpDecimal(int fd, unsigned long value)
     _Py_write_noraise(fd, ptr, end - ptr);
 }
 
-/* Format an integer in range [0; 0xffffffff] to hexadecimal of 'width' digits,
-   and write it into the file fd.
-
-   This function is signal safe. */
-
+/* Format an integer as hexadecimal with width digits into fd file descriptor.
+   The function is signal safe. */
 void
-_Py_DumpHexadecimal(int fd, unsigned long value, Py_ssize_t width)
+_Py_DumpHexadecimal(int fd, uintptr_t value, Py_ssize_t width)
 {
-    char buffer[sizeof(unsigned long) * 2 + 1], *ptr, *end;
+    char buffer[sizeof(uintptr_t) * 2 + 1], *ptr, *end;
     const Py_ssize_t size = Py_ARRAY_LENGTH(buffer) - 1;
 
     if (width > size)