Changeset 41051 in webkit for trunk/JavaScriptCore/assembler/X86Assembler.h

Timestamp:

Feb 17, 2009, 7:36:03 PM (16 years ago)

Author:

[email protected]

Message:

Add assertion to guard against oversized pc relative calls.

Reviewed by Geoff Garen

File:

• trunk/JavaScriptCore/assembler/X86Assembler.h (modified) (1 diff)

trunk/JavaScriptCore/assembler/X86Assembler.h

@@ -1243 +1243 @@
     {
         ASSERT(from.m_offset != -1);
-        
-        reinterpret_cast<int*>(reinterpret_cast<ptrdiff_t>(code) + from.m_offset)[-1] = reinterpret_cast<ptrdiff_t>(to) - (reinterpret_cast<ptrdiff_t>(code) + from.m_offset);
+        ptrdiff_t linkOffset = reinterpret_cast<ptrdiff_t>(to) - (reinterpret_cast<ptrdiff_t>(code) + from.m_offset);
+        ASSERT(linkOffset == static_cast<int>(linkOffset));
+        reinterpret_cast<int*>(reinterpret_cast<ptrdiff_t>(code) + from.m_offset)[-1] = linkOffset;
     }