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Diffstat (limited to 'js/src/jit/ProcessExecutableMemory.cpp')
| -rw-r--r-- | js/src/jit/ProcessExecutableMemory.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/js/src/jit/ProcessExecutableMemory.cpp b/js/src/jit/ProcessExecutableMemory.cpp index 301541541..71c2ab0dc 100644 --- a/js/src/jit/ProcessExecutableMemory.cpp +++ b/js/src/jit/ProcessExecutableMemory.cpp @@ -385,6 +385,14 @@ class PageBitSet #endif }; +// Limit on the number of bytes of executable memory to prevent JIT spraying +// attacks. +#if JS_BITS_PER_WORD == 32 +static const size_t MaxCodeBytesPerProcess = 128 * 1024 * 1024; +#else +static const size_t MaxCodeBytesPerProcess = 1 * 1024 * 1024 * 1024; +#endif + // Per-process executable memory allocator. It reserves a block of memory of // MaxCodeBytesPerProcess bytes, then allocates/deallocates pages from that. // |