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36 lines
1.1 KiB
C++
36 lines
1.1 KiB
C++
--- v8/src/flags/flags.cc.orig 2024-06-18 21:45:06 UTC
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+++ v8/src/flags/flags.cc
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@@ -15,6 +15,10 @@
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#include <set>
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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/lazy-instance.h"
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#include "src/base/platform/platform.h"
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@@ -34,7 +38,11 @@ namespace v8::internal {
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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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@@ -807,6 +815,10 @@ void FlagList::FreezeFlags() {
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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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