https://bugzilla.novell.com/show_bug.cgi?id=705186
https://bugzilla.novell.com/show_bug.cgi?id=705186#c0 Summary: soft-float decompose causes segfaults under some circumstances Classification: Mono Product: Mono: Runtime Version: 2.10.x Platform: Other OS/Version: Linux Status: NEW Severity: Normal Priority: P5 - None Component: JIT AssignedTo: mono-bugs@lists.ximian.com ReportedBy: mirko.wisc...@sma.de QAContact: mono-bugs@lists.ximian.com Found By: --- Blocker: --- User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.2.18) Gecko/20110614 Firefox/3.6.18 ( .NET CLR 3.5.30729; .NET4.0E) It seems that branch-opts optimizes a branch away so that you can have a situation like this: ... fcompare RXX RYY nop Now the ARM specific soft-float decompose in mono/mini/decompose.c tries to replace OP_FCOMPARE + next instruction with some soft-float ARM code. But the next instruction pointer is null so line 1588 in decompose.c segfaults. Reproducible: Always Steps to Reproduce: 1. Compile attached example code 2. Run on x86 3. Run on ARM with soft-float Actual Results: Output is like this on ARM: =========================== This makes the JIT work Stacktrace: at foo.bar.Main () <IL 0x00006, 0x0000f> at (wrapper runtime-invoke) object.runtime_invoke_void (object,intptr,intptr,intptr) <IL 0x0004c, 0xffffffff> Aborted Expected Results: No stacktrace -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the QA contact for the bug. You are the assignee for the bug. _______________________________________________ mono-bugs maillist - mono-bugs@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-bugs