<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1250"><base href="x-msg://8006/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Stock gdb won’t ever parse M3 expressions nor print M3 values.<div>So, there will always have to be some M3 support added.</div><div>I would much prefer providing M3 library support for source debuggers to parse and print.</div><div>I have no idea whether gdb has ever considered some of the extensibility support I pointed at in the link below.<br><div><br><div>
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-webkit-text-decorations-in-effect: none; text-indent: 0px; -webkit-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; -webkit-text-decorations-in-effect: none; text-indent: 0px; -webkit-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div><font class="Apple-style-span" color="#0000FF"><font class="Apple-style-span" face="Gill Sans"><span class="Apple-style-span" style="color: rgb(0, 0, 255); font-family: 'Gill Sans'; "><span class="Apple-style-span" style="color: rgb(0, 0, 255); font-family: 'Gill Sans'; ">Antony Hosking</span></span></font></font><font class="Apple-style-span" face="Gill Sans"><span class="Apple-style-span" style="font-family: 'Gill Sans'; "><span class="Apple-style-span" style="font-family: 'Gill Sans'; "><span class="Apple-converted-space"> </span>|<span class="Apple-converted-space"> </span></span></span><span class="Apple-style-span" style="font-family: 'Gill Sans'; "><span class="Apple-style-span" style="font-family: 'Gill Sans'; ">Associate Professor</span></span><span class="Apple-style-span" style="font-family: 'Gill Sans'; "><span class="Apple-style-span" style="font-family: 'Gill Sans'; "> | Computer Science | Purdue University</span></span></font></div><div><font class="Apple-style-span" face="GillSans-Light"><span class="Apple-style-span" style="font-family: GillSans-Light; ">305 N. University Street | West Lafayette | IN 47907 | USA</span></font></div><div><font class="Apple-style-span" color="#0000FF" face="Gill Sans"><span class="Apple-style-span" style="color: rgb(0, 0, 255); font-family: 'Gill Sans'; "><span class="Apple-style-span" style="color: rgb(0, 0, 255); font-family: 'Gill Sans'; ">Mobile</span></span></font><font class="Apple-style-span" face="GillSans-Light"><span class="Apple-style-span" style="font-family: GillSans-Light; "><span class="Apple-style-span" style="font-family: GillSans-Light; "><span class="Apple-converted-space"> </span>+1 765 427 5484</span></span></font></div><div><font class="Apple-style-span" face="GillSans-Light"><br class="khtml-block-placeholder"></font></div></span></span></span></span></span></span></span><br class="Apple-interchange-newline"></span></div></span></div></span><br class="Apple-interchange-newline"></span><br class="Apple-interchange-newline">
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<br><div><div>On Sep 10, 2012, at 1:47 AM, Jay K <<a href="mailto:jay.krell@cornell.edu">jay.krell@cornell.edu</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div class="hmmessage" style="font-size: 12pt; font-family: Calibri; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div dir="ltr">Please, no.<br><br>Stock gdb and stock Visual C++ and stock cdb/ntsd/windbg ought to work well with Modula-3.<br>I expect they will pretty good pretty soon, and we should try to make them even better maybe...<br>by making globals visible in a reasonable fashion.<br><br><br>m3gdb isn't supported on Darwin and HP-UX (no stabs), at least.<br>If the gcc backend becomes obsolete and deleted...m3gdb would be the last of the<br>forked always-going-stale never-merging GPL stuff... i.e. another ripe target...<br><br><br><br> - Jay<br><br><div><div id="SkyDrivePlaceholder"></div><hr id="stopSpelling">Subject: Re: [M3devel] "C-generating backend progress report, that nobody asked for" :)<br>From: <a href="mailto:hosking@cs.purdue.edu">hosking@cs.purdue.edu</a><br>Date: Sun, 9 Sep 2012 20:54:12 -0400<br>CC: <a href="mailto:dragisha@m3w.org">dragisha@m3w.org</a>; <a href="mailto:m3devel@elegosoft.com">m3devel@elegosoft.com</a><br>To: <a href="mailto:jay.krell@cornell.edu">jay.krell@cornell.edu</a><br><br>Stock debuggers are designed for C. They generally will not be able to grok M3. Better to use M3 run-time type information as per m3gdb. See <a href="http://dx.doi.org/10.1145/143103.143112" target="_blank">10.1145/143103.143112</a>.<div><br><div><br><div><div>On Sep 9, 2012, at 4:07 PM, Jay <<a href="mailto:jay.krell@cornell.edu">jay.krell@cornell.edu</a>> wrote:</div><br class="ecxApple-interchange-newline"><blockquote><div>The current method stinks for stock debugging. As I understand, globals are combined into structs & the fields all have generated names, & global records are flattened therein.</div><div><br></div><div><br></div><div>It works. But stock debuggers see garbage.</div><div><br><br> - Jay (briefly/pocket-sized-computer-aka-phone)</div><div><br>On Sep 9, 2012, at 12:22 PM, Antony Hosking <<a href="mailto:hosking@cs.purdue.edu">hosking@cs.purdue.edu</a>> wrote:<br><br></div><div></div><blockquote><div>I mis-spoke. I think LLVM can cope with much the same as we currently have. Front-end will continue to compute alignments and layouts. We can assert the front-end's datalayout by passing it to LLVM explicitly, which will complain if it does not match the actual target. This is a rather nice feature of LLVM in that it allows us to retain control while having LLVM optimize accordingly.</div><div><br><div><div>On Sep 9, 2012, at 11:05 AM, Antony Hosking <<a href="mailto:hosking@cs.purdue.edu"></a><a href="mailto:hosking@cs.purdue.edu">hosking@cs.purdue.edu</a>> wrote:</div><br class="ecxApple-interchange-newline"><blockquote><div style="word-wrap: break-word; ">Yes, agreed, these need to be properly typed too.<div>First step will be to lift the M3CG interface.</div><div>Problem: The compiler needs to control layout so that the run-time system knows where to find things. This means that we need to assert alignments and layouts produced by the backend are the same as those in the front-end. LLVM has nice ways to do this. How will we do it in the C backend? Does C have sufficient control over alignment?</div><div><br><div><div>On Sep 9, 2012, at 10:53 AM, Jay <<a href="mailto:jay.krell@cornell.edu"></a><a href="mailto:jay.krell@cornell.edu">jay.krell@cornell.edu</a>> wrote:</div><br class="ecxApple-interchange-newline"><blockquote><div>Btw, can this include "segment"/globals? Can they each be separate named variables? At least some of them?</div><div><br></div><div><br> - Jay (briefly/pocket-sized-computer-aka-phone)</div><div><br>On Sep 9, 2012, at 7:48 AM, Antony Hosking <<a href="mailto:hosking@cs.purdue.edu"></a><a href="mailto:hosking@cs.purdue.edu">hosking@cs.purdue.edu</a>> wrote:<br><br></div><div></div><blockquote>I'm looking at it...<div><br></div><div>First step is to lift slightly the level of M3CG to use properly typed memory access, instead of untyped address + offset.</div><div><br><div><div>On Sep 9, 2012, at 2:32 AM, Dragiša Durić <<a href="mailto:dragisha@m3w.org"></a><a href="mailto:dragisha@m3w.org"></a><a href="mailto:dragisha@m3w.org">dragisha@m3w.org</a>> wrote:</div><br class="ecxApple-interchange-newline"><blockquote><div style="font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; ">I hope somebody will take on LLVM :).</div></blockquote></div></div></blockquote></blockquote></div></div></div></blockquote></div></div></blockquote></blockquote></div></div></div></div></div></div></blockquote></div><br></div></div></body></html>