2023-08-16 22:26:55 +00:00
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Index: v8/src/flags/flags.cc
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--- v8/src/flags/flags.cc.orig
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+++ v8/src/flags/flags.cc
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@@ -12,6 +12,10 @@
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#include <iomanip>
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#include <sstream>
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+#if V8_OS_OPENBSD
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+#include <sys/mman.h>
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+#endif
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+
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#include "src/base/functional.h"
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#include "src/base/logging.h"
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#include "src/base/platform/platform.h"
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@@ -31,7 +35,11 @@
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namespace v8::internal {
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// Define {v8_flags}, declared in flags.h.
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+#if V8_OS_OPENBSD
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+FlagValues v8_flags __attribute__((section(".openbsd.mutable")));
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+#else
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FlagValues v8_flags;
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+#endif
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// {v8_flags} needs to be aligned to a memory page, and the size needs to be a
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// multiple of a page size. This is required for memory-protection of the memory
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2023-09-14 00:49:35 +00:00
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@@ -824,6 +832,10 @@ void FlagList::FreezeFlags() {
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2023-08-16 22:26:55 +00:00
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// Note that for string flags we only protect the pointer itself, but not the
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// string storage. TODO(12887): Fix this.
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base::OS::SetDataReadOnly(&v8_flags, sizeof(v8_flags));
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+#if V8_OS_OPENBSD
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+ if (mimmutable(&v8_flags, sizeof(v8_flags)) == -1)
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+ FATAL("unable to set immutability of v8_flags");
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+#endif
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}
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// static
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