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| author | Jan de Mooij <jdemooij@mozilla.com> | 2018-04-10 15:00:49 +0200 |
|---|---|---|
| committer | wolfbeast <mcwerewolf@gmail.com> | 2018-04-19 12:01:40 +0200 |
| commit | 9472136272f01b858412f2d9d7854d2daa82496f (patch) | |
| tree | 3d446907848b183c3c49773ad0e976824c06d4b7 /js/src/jit/ProcessExecutableMemory.h | |
| parent | f243b7b4af1242c2b80726e462bac045d70c37f0 (diff) | |
| download | uxp-9472136272f01b858412f2d9d7854d2daa82496f.tar.gz | |
Bug 1444668 - Avoid allocating large AssemblerBuffers. r=luke, r=bbouvier, a=RyanVM
Diffstat (limited to 'js/src/jit/ProcessExecutableMemory.h')
| -rw-r--r-- | js/src/jit/ProcessExecutableMemory.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/js/src/jit/ProcessExecutableMemory.h b/js/src/jit/ProcessExecutableMemory.h index 078ce7cb75..a0e2fab985 100644 --- a/js/src/jit/ProcessExecutableMemory.h +++ b/js/src/jit/ProcessExecutableMemory.h @@ -17,6 +17,14 @@ namespace jit { // alignment though. static const size_t ExecutableCodePageSize = 64 * 1024; +// 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 + enum class ProtectionSetting { Protected, // Not readable, writable, or executable. Writable, |