Dave Craggs 7 Posted May 21 (edited) I have a component (bpl) I am trying to install. I have installed this successfully on Delphi 12 on my notebook but on my desktop I get It builds fine but when you select install you get the access violation How can you debug this sort of thing? Dave Craggs Edited May 21 by Dave Craggs Share this post Link to post
Lajos Juhász 270 Posted May 21 Select the package and from the main menu activate Run - Parameters. For host application you shoulds select bds.exe (default location is C:\Program Files (x86)\Embarcadero\Studio\23.0\bin\bds.exe). Hit F9 a second instance of Delphi will start in that instance open the package and try to install. You should get a call stack. Share this post Link to post
JonRobertson 63 Posted May 21 Installing the package will require Delphi to call Register. I doubt that Delphi calls Register every time it loads a package. @Dave Craggs Since you are building, do you have source for all of the components in the package? You could add OutputDebugString logging to the Register procedure as a start, to narrow down the component causing the AV. Share this post Link to post
JonRobertson 63 Posted May 21 2 minutes ago, JonRobertson said: Installing the package will require Delphi to call Register. I doubt that Delphi calls Register every time it loads a package. You could try an alternative to Lajos' suggestion. Manually launch a second instance of Delphi, and then use Run->Attach to Process to attach to the first. You will want to check Task Manager before launching the second instance, to get the PID of the first. You will see both instances in the Attach to Process dialog. Share this post Link to post
Anders Melander 1705 Posted May 21 40 minutes ago, JonRobertson said: You will want to check Task Manager before launching the second instance, to get the PID of the first. You will see both instances in the Attach to Process dialog. That's not necessary; The attach dialog doesn't allow you to attach an instance to itself: 1 Share this post Link to post
Dave Craggs 7 Posted May 22 12 hours ago, Lajos Juhász said: Select the package and from the main menu activate Run - Parameters. For host application you shoulds select bds.exe (default location is C:\Program Files (x86)\Embarcadero\Studio\23.0\bin\bds.exe). Hit F9 a second instance of Delphi will start in that instance open the package and try to install. You should get a call stack. Did that - when you say open up the package do you mean open up the project again and run install? Did that and both instances of d12 crashed. I do have the source. Share this post Link to post
Dave Craggs 7 Posted May 22 This also describes the process https://stackoverflow.com/questions/62969608/debugging-a-package-during-component-installation But both instances of Delphi just disappear! Share this post Link to post
Lajos Juhász 270 Posted May 22 25 minutes ago, Dave Craggs said: But both instances of Delphi just disappear! The first instance of bds should debug the second one. Thus, it should break on the error and show the call stack. The last Delphi version where I have had problems that required to debug a second instance of Delphi was XE5. In Delphi 12 I compile without runtime packages and have a limited of debugging this kind of errors. Share this post Link to post
msohn 26 Posted May 22 49 minutes ago, Dave Craggs said: But both instances of Delphi just disappear! A process (and its children) just disappearing without any further error message, typically indicates a stack overflow (from my experience, I'm not aware of other causes). Did you check Windows event log? The crash should definitely be logged there. Maybe it contains a pointer on what the cause was. Did you try setting an as-early-as-possible breakpoint in the loaded package(s). I.e. initialization section of the dpk or a unit. You'd hope you can stop it before the crash occurs. Since you mentioned it worked on another machine: maybe some external references (DLLs etc) are missing? Normally that would just prevent it from loading and not cause such a crash. But I've seen DLLs reacting very strange if in-turn they had missing dependencies (e.g. VC++ runtime missing). Share this post Link to post
Dave Craggs 7 Posted May 22 This is strange Got these from the event log This is Delphi 12.1 Will do a more complete comparison between the two installs. Share this post Link to post
msohn 26 Posted May 22 (edited) 13 minutes ago, Dave Craggs said: Got these from the event log The exception code is STATUS_FATAL_USER_CALLBACK_EXCEPTION, see https://superuser.com/a/1643581 At this stage, I'd try to run DependencyWalker on the bpl to check for missing dependencies. Edited May 22 by msohn Share this post Link to post
Dave Craggs 7 Posted May 22 Is that this? https://dependencywalker.com/ Looks quite old! Share this post Link to post
Remy Lebeau 1330 Posted May 22 6 hours ago, Dave Craggs said: Got these from the event log 0xEEDFADE is a Delphi exception. That's a good sign, it means it was thrown deliberately, not something unexpected like an Access Violation, etc. The 2nd IDE instance that is debugging the 1st instance should be able to show you what the exception actually is. 6 hours ago, Dave Craggs said: 0xC000041D is STATUS_FATAL_USER_CALLBACK_EXCEPTION. That is not a good sign. Of course, it could also just be a side effect of the 1st error. Do you have the same problem if you load the component package dynamically at runtime via LoadPackage()? Or does the error happen strictly during install only? Share this post Link to post
msohn 26 Posted May 22 5 hours ago, Dave Craggs said: Is that this? https://dependencywalker.com/ Looks quite old! Yes it does look old, but it still does the job for me. Did you give it a try? 1 Share this post Link to post
Davide Angeli 43 Posted May 23 (edited) 14 hours ago, Dave Craggs said: Looks quite old! I don't know if could help but a rewrite of the old dependency walker is here: https://github.com/lucasg/Dependencies Edited May 23 by Davide Angeli 1 Share this post Link to post
Dave Craggs 7 Posted May 23 The newer version of the dependency walker worked fine, no issues found. I tried copying the bpl files from the working system and still had the same problem. I wonder if there is a BPL conflict? Share this post Link to post
Dave Craggs 7 Posted May 23 Yes - bpl conflict. These bpls are also stored in SYSWOW64. Conflicting with a previous version of Delphi. I need to rename the BPL files so they are unique to Delphi12 I think. Share this post Link to post
Anders Melander 1705 Posted May 23 2 hours ago, Davide Angeli said: I don't know if could help but a rewrite of the old dependency walker is here: https://github.com/lucasg/Dependencies Ugh. Rewritten in C# using WPF, It's ironic that they've named the new application "Dependencies"; The old one had 1 DLL. The new has 54 DLLs. 2 Share this post Link to post
msohn 26 Posted May 23 34 minutes ago, Dave Craggs said: Yes - bpl conflict. These bpls are also stored in SYSWOW64. Conflicting with a previous version of Delphi. I need to rename the BPL files so they are unique to Delphi12 I think. You might want to consider using $LIBSUFFIX AUTO which is around since 10.4 IIRC. See https://docwiki.embarcadero.com/RADStudio/Athens/en/Description Share this post Link to post
Pat Foley 51 Posted May 23 Also the 290 version should be given a new guid unless using the '280' source is wanted. A new interface needs a new guid. Share this post Link to post