Issue #23654: Fix faulthandler._stack_overflow() for the Intel C Compiler (ICC)
Issue #23654: Turn off ICC's tail call optimization for the stack_overflow
generator. ICC turns the recursive tail call into a loop.
Patch written by Matt Frank.
diff --git a/Misc/ACKS b/Misc/ACKS
index cdee1bb..d0d5e25 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -436,6 +436,7 @@
Chris Foster
John Fouhy
Andrew Francis
+Matt Frank
Stefan Franke
Martin Franklin
Kent Frazier
diff --git a/Modules/faulthandler.c b/Modules/faulthandler.c
index 01e7beb..c729414 100644
--- a/Modules/faulthandler.c
+++ b/Modules/faulthandler.c
@@ -911,7 +911,14 @@
}
#if defined(HAVE_SIGALTSTACK) && defined(HAVE_SIGACTION)
-static Py_uintptr_t
+#ifdef __INTEL_COMPILER
+ /* Issue #23654: Turn off ICC's tail call optimization for the
+ * stack_overflow generator. ICC turns the recursive tail call into
+ * a loop. */
+# pragma intel optimization_level 0
+#endif
+static
+Py_uintptr_t
stack_overflow(Py_uintptr_t min_sp, Py_uintptr_t max_sp, size_t *depth)
{
/* allocate 4096 bytes on the stack at each call */