mmap for poison heap

source/quickjs-internal.h

@@ -78,7 +78,7 @@
  */
 // #define DUMP_BYTECODE  (1)
 /* dump GC summary: old/new heap, recovery %, heap growth */
-// #define DUMP_GC
+#define DUMP_GC
 /* dump detailed GC: roots, scanning, object traversal (implies DUMP_GC) */
 // #define DUMP_GC_DETAIL
 #ifdef DUMP_GC_DETAIL
@@ -115,6 +115,14 @@
 #define gc_poison_region(addr, size) ((void)0)
 #define gc_unpoison_region(addr, size) ((void)0)
 #endif
+
+#include <sys/mman.h>
+#include <unistd.h>
+
+static inline size_t poison_page_align(size_t size) {
+  size_t ps = (size_t)sysconf(_SC_PAGESIZE);
+  return (size + ps - 1) & ~(ps - 1);
+}
 #endif /* POISON_HEAP */
 
 #ifdef HAVE_ASAN