Revert "Bug 1444668 - Avoid allocating large AssemblerBuffers. r=luke, r=bbouvier, a=RyanVM"

This reverts commit 9472136272f01b858412f2d9d7854d2daa82496f.

1 files changed, 8 insertions, 0 deletions

diff --git a/js/src/jit/ProcessExecutableMemory.cpp b/js/src/jit/ProcessExecutableMemory.cpp
index 301541541e..71c2ab0dce 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.
 //