From c4ae6cb5005cfa53be0af466a5619e7455c15744 Mon Sep 17 00:00:00 2001 From: Samuel Williams Date: Thu, 17 Apr 2025 22:21:51 +0900 Subject: Prefer `th->ec` for stack base/size. (#13101) --- ext/-test-/stack/stack.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 ext/-test-/stack/stack.c (limited to 'ext/-test-/stack/stack.c') diff --git a/ext/-test-/stack/stack.c b/ext/-test-/stack/stack.c new file mode 100644 index 0000000000..d69ca4da84 --- /dev/null +++ b/ext/-test-/stack/stack.c @@ -0,0 +1,24 @@ +#include "ruby.h" +#include "internal/string.h" + +static VALUE +stack_alloca_overflow(VALUE self) +{ + size_t i = 0; + + while (1) { + // Allocate and touch memory to force actual stack usage: + volatile char *stack = alloca(1024); + stack[0] = (char)i; + stack[1023] = (char)i; + i++; + } + + return Qnil; +} + +void +Init_stack(VALUE klass) +{ + rb_define_singleton_method(rb_cThread, "alloca_overflow", stack_alloca_overflow, 0); +} -- cgit v1.2.3