<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Hi Vincent,<br><br></div><div><br>On Apr 18, 2018, at 11:33 AM, <<a href="mailto:Vincent.Blondeau@lamresearch.com">Vincent.Blondeau@lamresearch.com</a>> <<a href="mailto:Vincent.Blondeau@lamresearch.com">Vincent.Blondeau@lamresearch.com</a>> wrote:<br><br></div><blockquote type="cite"><div><span></span></div></blockquote><blockquote type="cite"><div>
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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I would like to set up a breakpoint in the VM but I got this error when running:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">Cannot insert breakpoint 1.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">Error accessing memory address 0x509cad: Input/output error.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">For this, I am using gdb under Cygwin (same issue with powershell) and invoque the primitive I want to test:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console";color:#BFBF00">pharo.cog.spur/builddbg/vm
</span><span style="font-size:9.0pt;font-family:"Lucida Console"">$ gdb --args ./Pharo.exe –headless ../..somewhereOnMyDisk.../Pharo.image eval "FilePluginPrims new primitiveStdioDescriptorIsATTY."<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I get these results:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">GNU gdb (GDB) 7.6.1<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">Reading symbols from C:\Users\BlondVi\Documents\GitRepos\opensmalltalk-vm\build.win32x86\pharo.cog.spur\builddbg\vm\Pharo.exe...done.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console""><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">Next, I set a breakpoint in the primitive C method I created and run the app:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console""><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">(gdb) br sqStdioDescriptorIsATTY<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">Breakpoint 1 at 0x509cb6: file ../../platforms/win32/plugins/FilePlugin/sqWin32FilePrims.c, line 337.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">(gdb) r<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">Starting program: C:\Users\BlondVi\Documents\GitRepos\opensmalltalk-vm\build.win32x86\pharo.cog.spur\builddbg\vm/./Pharo.exe --headless
../../../../../../../../..temp/logoVM/logoVM.image eval "FilePluginPrims new primitiveStdioDescriptorIsATTY."<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">[New Thread 27416.0x95bc]<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">[New Thread 27416.0xa1d0]<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">[New Thread 27416.0x3aa4]<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">[New Thread 27416.0x88bc]<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">(gdb) Warning:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">Cannot insert breakpoint 1.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">Error accessing memory address 0x509cad: Input/output error.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">What should I do to set the breakpoint correctly?</p></div></div></blockquote><div><br></div>AFAICT you're doing everything right. But if you're on 64-bit Cygwin then it won't work. You can build the 32-bit vm on a 64-bit windows but gdb can only be used to debug 64-bit programs. Even installing the gdb from 32-bit Cygwin doesn't work. So if this is your configuration you'll have the create a 32-but Cygwin and debug the 32-bit app there-on.<div><br></div><div>HTH</div><div><br><blockquote type="cite"><div><div class="WordSection1"><p class="MsoNormal"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks in advance,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Vincent Blondeau<span style="font-size:9.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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