<div dir="ltr"><div><div><div><div><div>Interestingly, when I recompile on MacOSX, the bug happens on fast version of squeak.stack.v3 but not on debug version!!!<br></div>That means that it's vain to track the problem with VM simulator.<br></div>It's also vain to try debugging at C level...<br><br></div>What remains is:<br>Use lldb the unstripped fast version, put a break point in some arithmetic primitive then stepi into assembly.<br></div>Or carefully inspect the compiler warnings (with ./mvm -- WARNINGS='-Wall -Wextra') and carefully read generated C code to track for a possible undefined behavior striking.<br></div><div>Or compare generated C code with generated C assembly to understand what's going on.<br></div>Or instrument the generated code with undefined behavior guards (I don't remember the clang incantation for that, but it's possible).<br></div><div class="gmail_extra"><br><div class="gmail_quote">2016-09-02 22:09 GMT+02:00 Nicolas Cellier <span dir="ltr"><<a href="mailto:nicolas.cellier.aka.nice@gmail.com" target="_blank">nicolas.cellier.aka.nice@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>Hi Laura,<br></div>it sounds like some LargeIntegers arithmetic is broken in v3...<br></div>The clock symptoms is just a side effect.<br></div><div class="gmail_extra"><br><div class="gmail_quote">2016-09-02 21:23 GMT+02:00 Laura Perez Cerrato <span dir="ltr"><<a href="mailto:lauraperezcerrato@gmail.com" target="_blank">lauraperezcerrato@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <br><div dir="ltr"><div>Hello everyone,</div><div><br></div><div>Lately, while working on the VM, I noticed that a few primitives related with the clock on V3 were returning incorrect values. Cloning the repository and building a Squeak Cog V3 VM produces a VM in which DateAndTime class>>#now answers a value closer than a day to the epoch in both Squeak 4.5 and the lastest version of Cuis. In the lastest version of Cuis, Time class>>#primLocalMicrosecondCl<wbr>ock, Time class>>#primLocalSecondClock and Time class>>#primHighResClock return odd values. This problem is seen exclusively on V3 VMs as far as I can tell, independently of the interpreter. </div><div><br></div><div>I wasn't capable of pinning down the reason for this strange behaviour. If anyone could give me a hand with that, I'd appreaciate it.</div><div><br></div><div>Cheers!</div><div><br></div><div><div><div dir="ltr"><font face="arial, helvetica, sans-serif" color="#000000" size="2">-Laura Perez Cerrato</font></div></div></div>
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