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| author | wolfbeast <mcwerewolf@gmail.com> | 2018-08-30 12:26:26 +0200 |
|---|---|---|
| committer | wolfbeast <mcwerewolf@gmail.com> | 2018-08-30 12:26:26 +0200 |
| commit | f214aa5dbe2c4aa3e543aecc2b6ad96d7786862e (patch) | |
| tree | dcf1a9a2d351b6ab9364f0cbd06a341a8935a706 /js/src/jit/ProcessExecutableMemory.cpp | |
| parent | 0bc2511432fe0cdcae92aae71576b6eb9bad7f5c (diff) | |
| download | UXP-f214aa5dbe2c4aa3e543aecc2b6ad96d7786862e.tar UXP-f214aa5dbe2c4aa3e543aecc2b6ad96d7786862e.tar.gz UXP-f214aa5dbe2c4aa3e543aecc2b6ad96d7786862e.tar.lz UXP-f214aa5dbe2c4aa3e543aecc2b6ad96d7786862e.tar.xz UXP-f214aa5dbe2c4aa3e543aecc2b6ad96d7786862e.zip | |
Revert "Bug 1444668 - Avoid allocating large AssemblerBuffers. r=luke, r=bbouvier, a=RyanVM"
This reverts commit 9472136272f01b858412f2d9d7854d2daa82496f.
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. // |