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--- src/3rdparty/chromium/v8/src/flags/flags.cc.orig 2023-09-13 12:11:42 UTC
+++ src/3rdparty/chromium/v8/src/flags/flags.cc
@@ -12,6 +12,10 @@
#include <iomanip>
#include <sstream>
+#if V8_OS_OPENBSD
+#include <sys/mman.h>
+#endif
+
#include "src/base/functional.h"
#include "src/base/logging.h"
#include "src/base/platform/platform.h"
@@ -31,7 +35,11 @@
namespace v8::internal {
// Define {v8_flags}, declared in flags.h.
+#if V8_OS_OPENBSD
+FlagValues v8_flags __attribute__((section(".openbsd.mutable")));
+#else
FlagValues v8_flags;
+#endif
// {v8_flags} needs to be aligned to a memory page, and the size needs to be a
// multiple of a page size. This is required for memory-protection of the memory
@@ -824,6 +832,10 @@ void FlagList::FreezeFlags() {
// Note that for string flags we only protect the pointer itself, but not the
// string storage. TODO(12887): Fix this.
base::OS::SetDataReadOnly(&v8_flags, sizeof(v8_flags));
+#if V8_OS_OPENBSD
+ if (mimmutable(&v8_flags, sizeof(v8_flags)) == -1)
+ FATAL("unable to set immutability of v8_flags");
+#endif
}
// static
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