[Mono-bugs] [Bug 80498][Wis] New - alignment of address returned by localloc

bugzilla-daemon at bugzilla.ximian.com bugzilla-daemon at bugzilla.ximian.com
Thu Jan 11 10:17:11 EST 2007


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Changed by erven.rohou at st.com.

http://bugzilla.ximian.com/show_bug.cgi?id=80498

--- shadow/80498	2007-01-11 10:17:11.000000000 -0500
+++ shadow/80498.tmp.26208	2007-01-11 10:17:11.000000000 -0500
@@ -0,0 +1,44 @@
+Bug#: 80498
+Product: Mono: Runtime
+Version: 1.2
+OS: 
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Wishlist
+Component: JIT
+AssignedTo: lupus at ximian.com                            
+ReportedBy: erven.rohou at st.com               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: alignment of address returned by localloc
+
+This is more a question than a problem.
+
+Description of Problem:
+localloc returns an address aligned to 4. I was wondering if you would
+consider 8.
+
+Steps to reproduce the problem:
+1. Unpack all the attached files in a directory
+2. Run foo with mono
+
+Actual Results: 1
+Expected Results: 0
+
+How often does this happen? 
+sometimes
+
+Additional Information:
+This is compiled from C. The code originally comes from the GCC testsuite.
+The rationale is that I would expect malloc and alloca to have the same
+behavior from the user's point of view. ECMA-335 (Partition 3, 3.47
+suggests to use localloc to implement the C alloca statement).
+If I allocate storage for a double or a longlong, it will not be naturally
+aligned.
+Note that ECMA-335 (Partition 1, 12.6.2) does not require 8-byte alignment,
+only suggests it.
+Just wondering...


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