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Difference between revisions of "CDT/Obsolete/MultiCoreDebugWorkingGroup/calls/minutes"

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= Multicore Debug Workgroup Minutes of Meetings =
 
= Multicore Debug Workgroup Minutes of Meetings =
  
−
== July 10th, 2012 ==
+
== June 9th, 2015 ==
  
 
=== Attendees ===
 
=== Attendees ===
  
 
# Phil Mason (Broadcom)
 
# Phil Mason (Broadcom)
 +
# Marc Dumais (Ericsson)
 +
# Jonah Graham (Kichwa Coders)
 
# Mikhail Khodjaiants (Mentor)
 
# Mikhail Khodjaiants (Mentor)
−
# Jason Litton (Sage)
+
# Jeff Johnston (RedHat)
−
# Abeer Bagul (Tensilica)
+
# William Riley (Renesas)
−
# Bill Swanson (Tilera)
+
 
# Marc Khouzam (Ericsson)
 
# Marc Khouzam (Ericsson)
  
 
=== Minutes ===
 
=== Minutes ===
  
−
'''General'''
+
* Mars release
−
* Marc on vacation next meeting. If someone can chair the meeting that would be great, if not, we'll have to cancel the August call.
+
** William did the GDB Hardware debug testinging without any issues
 +
* RCP Standalone debugger
 +
** CDT's update site now has an rcp and rcp-repository directory.  The first contains the RCP tar files, the second is update site for the RCP (that update site will make sense for future upgrades).
 +
** We plan on putting a direct link in CDT's download page to the RCP binaries and update site.
 +
** How can we advertise this?
 +
** Update N&N
 +
** Update Standalone debugger wiki page
 +
** Maybe Doug can blog about it?
 +
** We could put some info in the CDT documentation, although it is too late for 8.7
 +
** Is there a use case for the RCP Standalone debugger and the Standalone debugger scrip?
 +
* Remote debugging
 +
** GDB 7.10 will allow to use the remote binary even on the host.
 +
*** Won't work for stripped remote binaries
 +
*** Could be a problem if the bandwith between GDB and gdbserver is bad
 +
*** CDT will need to allwo the user to choose between using the remote binary or not
 +
*** https://bugs.eclipse.org/bugs/show_bug.cgi?id=400033#c46
 +
*** The 'stripped' binary problem can apply to local attach, where the process could have been run using a stripped binary
 +
** Automatic remote debugging could provide an option to automatically strip the binary before uploading it to the target
 +
* Interrupting issues
 +
** On slow targets, interrupt can take a long enough time that the user presses interrupt a second time, which can kill GDB
 +
** CDT should disable the interrupt button when an interrupt is pending.
 +
** This was in the context of setting breakpoints which require CDT to interrupt the target
 +
** GDB requires we interrupt the target to set breakpoints only on linux and only for native (not using gdbserver).  We will try to get this improved in GDB to not have this restriction and allow CDT to be simpler
 +
* Need to improve extensibility of DSF-GDB services [http://eclip.se/469763 Bug 469763]
 +
** Example of current situation:
 +
DSF-GDB provides:
 +
  GDBRunControl_7_2_NS extends GDBRunControl_7_0_NS
 +
someone specializes this by creating
 +
  MyPrivateGDBRunControl extends GDBRunControl_7_2_NS
 +
The day that CDT adds a new version like
 +
  GDBRunControl_7_9_NS extends GDBRunControl_7_2_NS
 +
the extending class MyPrivateGDBRunControl will not use GDBRunControl_7_9_NS
 +
unless the developer notices this new version. Both Mikhail and William confirmed
 +
they regularly have this issue.
  
−
'''Demo of Expressions view working sets'''
+
We propose to insert an empty class that will always be at the top.
−
* Abeer gave a nice demo of the current status of the Expressions view working set (see [https://bugs.eclipse.org/372181 bug 372181]).
+
  Something like
−
* Working sets can be created in the expressions view and associated to an instance of the view
+
  GDBRunControl_NS_Head extends GDBRunControl_7_2_NS
−
* A user can then create a set of expressions for a core, and pin the view to that core; then she would use a cloned view to show a different set of expressions for another core.  That way, only expressions that make sense to the relevant core would be shown.
+
Extenders would use
−
* Suggestion to display in the view what working set is active at the time.  We could use the view secondary id as is done by the Clone feature, or maybe it would be better to use the 'description' bar that is used by the Pin feature.
+
  MyPrivateGDBRunControl extends GDBRunControl_NS_Head
−
* Suggestion to 'link' working sets with a debug context.  That way, when the debug context changes, the expressions view would automatically change the active working set to match that debug context. This would allow the expressions view to automatically display the expressions that can be evaluated for the debug context.
+
When CDT wants to introduce GDBRunControl_7_9_NS, we would do it like this:
−
* Suggestion to use GDB's ability to evaluate an expression to decided if that expression should be displayed or not.  So, when a debug context is selected, all active expressions are sent to GDB; all expressions that return an error are deactivated for that debug context. This is kind of building working sets automatically based on the validity of an expression.
+
  GDBRunControl_NS_Head extends GDBRunControl_7_9_NS extends GDBRunControl_7_2_NS
−
* Abeer will push current solution to Gerrit to allow people to try it
+
  which will allow MyPrivateGDBRunControl to automatically inherit from the new version.
 +
  This change need not break the API and could be done easily anytime.
  
−
'''Enhanced Expressions view'''
+
* Watchpoint using GDB's -location flag [http://eclip.se/469764 Bug 469764]
−
* [http://wiki.eclipse.org/CDT/EnhancedExpressionsProposed Enhancement] to allow to filter registers (see [http://bugs.eclipse.org/381754 bug 381754]).
+
** Currently setting watchpoints to say ptr->a will cause the watchpoint to follow the expression.
−
* Marc has finished coding the feature.  The code is entirely independent of the rest of the Expressions service code, so it should be easy to maintain.  Marc will commit to master and see how things go.
+
** If the value of ptr changes, the watchpoint will hit
−
* How to make the user aware of this feature?  Of course through the New&Noteworthy, but is there a 'live' way to tell the user the Expressions view accepts these matching patterns? 
+
** Often, the user wants to know if the original ptr->a changes
−
* Suggestion to have a context-menu entry to show that this feature is available.
+
** GDB offers this by using the 'watch -location' flag
 +
** CDT should offer access to that
 +
** Jonah has confirmed that to workaround this limitation he has to first find the address of ptr->a and use that hard coded address to set the wathpoint
  
−
'''Register-grouping for DSF-GDB'''
+
== May 12th, 2015 ==
−
* It would be nice to have in-view cell editing support like for the Expressions view.  That would make creating groups easy, and we could use the same solution as what is being done for the 'Enhanced Expressions view'.  The complexity of such a solution is unclear at this time.
+
−
* An easier solution is to mimic the CDI register-grouping solution.
+
−
* An enhancement to the CDI solution is to use in-view multi-selection to specify the content of a new register group.
+
−
* Marc will work on this solution in the short-term (see [http://bugs.eclipse.org/235747 bug 235747]).
+
−
 
+
−
'''Memory problems'''
+
−
* Memory views don't work with multi-process
+
−
* Are memory spaces of DSF the solution to that?
+
−
* Mikhail to create a bug for this problem
+
−
 
+
−
== June 12th, 2012 ==
+
  
 
=== Attendees ===
 
=== Attendees ===
  
−
# Norman Yee (Analog Devices)
+
# Andrew McLachlan (Analog Devices)
 
# Phil Mason (Broadcom)
 
# Phil Mason (Broadcom)
 +
# Alvaro Sanchez-Leon (Ericsson)
 +
# Marc Dumais (Ericsson)
 
# Mikhail Khodjaiants (Mentor)
 
# Mikhail Khodjaiants (Mentor)
−
# Abid Hafiz (Mentor)
+
# William Riley (Renesas)
−
# Mark Goodchild (Renesas Electronics)
+
−
# Abeer Bagul (Tensilica)
+
−
# Bill Swanson (Tilera)
+
 
# Marc Khouzam (Ericsson)
 
# Marc Khouzam (Ericsson)
  
 
=== Minutes ===
 
=== Minutes ===
  
−
'''General'''
+
* Mars release
−
* Juno is a good release for Debug.  Most new features for CDT.
+
** 8.7 branch created.  Bugs should be committed to both cdt_8_7 and master
 +
* Standalone debugger fails to launch with M6 [http://eclip.se/467109 Bug 467109]
 +
** Marc K sees this on his machine.  Alvaro to try on his machine to confirm
 +
* RCP Standalone debugger
 +
** Separate download to install
 +
** Easy to get working
 +
** Easy way to get users to use Eclipse without any setup
 +
** Patch under review
 +
* Docker contribution
 +
** Waiting for IP approval CORRECTION after meeting: IP Approval received. Contribution to Linux Tools done for M7. Contribution to CDT being updated for RC1
 +
** Plugins in LinuxTools to support Docker containers
 +
** Patch proposed for CDT to launch a binary inside a Docker container (similar to remote debugging)
 +
** Would be an optional feature of CDT
 +
* Register Grouping and Variable Objects for registers
 +
** Mikhail has continued work on this patch but has no time currently
 +
** Trying a new registers service with a second service on top to do the grouping
 +
** What are the registers listed that don't have names given by GDB?
 +
** We can fetch the values using -data-list-register-values and the index, but we don't have a name for the user
 +
** Without a name, it does not seem valuable for a user
 +
** Can't use varObj with this also, as it needs a name
 +
* RunControl Grouping
 +
** Marc K working on reviving Dobrin's grouping patch
 +
** Final goal is to support GDB's planned ITSet grouping feature
 +
* [https://wiki.eclipse.org/CDT/User/NewIn87#Exited_processes_shown_in_the_debug_view Showing Exited processes]
 +
* Other
 +
** GDB has a format to pad hex output with 0s.  This can be useful especially for registers
 +
** Should CDT use it?  Should it be another optional format for the user to choose from?
  
−
'''Testing for Juno'''
+
== March 17th, 2015 ==
−
* Manual Linux testing was [http://wiki.eclipse.org/CDT/8.1_RC3_Testing done]
+
−
* We need someone that will take care of Windows testing.  Mikhail did try a small session on Windows and it was ok.
+
−
* JUnit test for Debug [https://bugs.eclipse.org/bugs/show_bug.cgi?id=378834 soon to be running] on Hudson at Eclipse.org.  Starting with GDB 7.4 only.
+
−
 
+
−
'''Enhanced Expressions view'''
+
−
* [[CDT/EnhancedExpressions | Enhanced expressions view proposal]] to allow to filter registers (see [https://bugs.eclipse.org/bugs/show_bug.cgi?id=381754 bug 381754])
+
−
* Prototype available, Marc to focus to this feature next
+
−
 
+
−
'''Breakpoint improvements'''
+
−
* Breakpoints are the weakest part of CDT
+
−
* Improving the situation is of interest to Ericsson, Mentor, Tensilica, Renesas.
+
−
* Need context-sensitive breakpoints.  Mikhail had started this in [https://bugs.eclipse.org/bugs/show_bug.cgi?id=360735 bug 360735]
+
−
* Suggestion to have an editable hover in the editor to select which threads/cores a breakpoint applies to
+
−
* Suggestion in having breakpoint view show an entry for each target a breakpoint can be applied to
+
−
* We could add bp hit count to the bp view if we have a per-target breakpoint entry
+
−
* Complexity arises when looking at surrounding scenarios: before launching, multiple debug sessions, etc.  We should determine what the user-experience should be during a debugging session, and then somehow deal with all the surrounding scenarios.
+
−
* Would be nice to get people to focus on this effort and get some improvements done, as there is a lot of interest
+
−
 
+
−
'''Visualizer'''
+
−
* What should be the next steps for the Visualizer/Multicore Visualizer?
+
−
* What to choose for generic Visualizer and what for Multicore Visualizer
+
−
** Should try to make things generic when possible, without spending too much extra time on it
+
−
* Showing extra hardware.  What kind of hardware should we support?  Need concrete examples
+
−
 
+
−
'''OS Awareness'''
+
−
* [https://bugs.eclipse.org/360314 OS Awareness bug 360314]
+
−
* GDB support available in HEAD, with one more tweak expected.
+
−
* Review comments posted on Gerrit.  Vladimir updating contribution to match comments.
+
−
* Updated contribution is expected to make use of DSF services instead of sending commands from the view code to GDB
+
−
 
+
−
== May 8th, 2012 ==
+
  
 
=== Attendees ===
 
=== Attendees ===
  
 +
# Andrew McLachlan (Analog Devices)
 
# Phil Mason (Broadcom)
 
# Phil Mason (Broadcom)
 +
# Alvaro Sanchez-Leon (Ericsson)
 +
# Marc-Andre Laperle (Ericsson)
 +
# Marc Dumais (Ericsson)
 
# Mikhail Khodjaiants (Mentor)
 
# Mikhail Khodjaiants (Mentor)
−
# Jason Litton (Sage)
+
# Doug Schaefer (QNX)
−
# Bill Swanson (Tilera)
+
# William Riley (Renesas)
 
# Marc Khouzam (Ericsson)
 
# Marc Khouzam (Ericsson)
  
 
=== Minutes ===
 
=== Minutes ===
 +
* Summary of CDT Summit/CDT Day/EclipseCon
 +
** Java 8
 +
** do we do it on master, it will break java 7, it should be done on the 9_0 branch
 +
** email to the list
 +
* cdt 9.0 for Mars+1 release (June 2016)
 +
** 9_0 branch where API breaking changes are allowed
 +
* Doug plans to split out native plugins into their own git repo and build them separately to provide them to others that should not depend on CDT
 +
* CDT 8.7 plans
 +
** Grouping feature to support
 +
*** Marc K has started looking at this again, based on the work from TI
 +
** Memory view fixes/improvements
 +
*** Alvaro working on this
 +
** VarObjects for Registers would be interesting.
 +
*** Currently we assume every register is under a group, but it may not be the right thing to do
 +
* Enhancement bug written to LaunchBar allowing to handle multiple launches/launch group http://eclip.se/462372
 +
** Mikhail has a patch that removes some duplications in the debug view in the case of the launch group
 +
* Patches needing review
 +
** A couple of breakpoint patches from Mikhail
 +
** William submitted a patch for managed build, will email the list to get noticed
  
−
'''General'''
+
== February 5th, 2015 ==
−
* Feature freeze has come and gone.
+
−
* Deadline for bug fixes for Juno is June 15th.
+
−
* We have a good list of [http://wiki.eclipse.org/CDT/User/NewIn81#Debug new features] that apply to multicore in Juno:
+
−
** Multicore Visualizer View
+
−
** Edit Breakpoint on Create
+
−
** Timeout support for GDB commands
+
−
** Multi-select Resume/Suspend operations
+
−
** Show only suspended threads in Debug view
+
−
* Work continues for Kepler
+
−
 
+
−
'''Testing for Juno'''
+
−
* It would be good for people to tests Juno.  Focus from this group would be the new Debug features added to Juno
+
−
* Bill will look at testing the Multicore Visualizer by end of May
+
−
* Sage uses CDT on Windows.  Jason will run some tests for the Juno release on Windows.
+
−
* Jason will try to to get the Debug JUnit tests to work on Windows again.
+
−
* Mikhail has access to a Windows machine but needs to get it properly setup.
+
−
* Marc will do testing on Linux and will focus on the new features of Debug
+
−
 
+
−
'''Proposed features'''
+
−
* Marc posted a list of ideas for multicore-debugging on the wiki [http://wiki.eclipse.org/CDT/MultiCoreDebugWorkingGroup/PotentialFeatures#General_enhancements_proposed_for_Multicore_Debugging here]
+
−
* Mentor discussing making improvement to breakpoints, which could be in-line with proposal above
+
−
 
+
−
'''OS Awareness'''
+
−
* New patch posted by Vladimir.  Too late for Juno but Marc will try to get it in early for Kepler.  Still dependent on GDB functionality that is not in open-source yet, so we'll need that resolved.
+
−
* [https://bugs.eclipse.org/360314 OS Awareness bug 360314]
+
−
 
+
−
 
+
−
== April 10th, 2012 ==
+
  
 
=== Attendees ===
 
=== Attendees ===
  
 
# Phil Mason (Broadcom)
 
# Phil Mason (Broadcom)
 +
# Alvaro Sanchez-Leon (Ericsson)
 +
# Marc Dumais (Ericsson)
 
# Mikhail Khodjaiants (Mentor)
 
# Mikhail Khodjaiants (Mentor)
−
# Jason Litton (Sage)
+
# Vladimir Prus (Mentor)
−
# Bill Swanson (Tilera)
+
# Doug Schaefer (QNX)
 +
# Jeff Johnston (RedHat)
 
# Marc Khouzam (Ericsson)
 
# Marc Khouzam (Ericsson)
  
 
=== Minutes ===
 
=== Minutes ===
−
''' Things for Juno'''
+
* [https://wiki.eclipse.org/CDT/summitecon2015 CDT Summit/CDT Day]
−
 
+
** Planning continues.  10 attendees have signed up so far.  Based on last year, we expect more though
−
* Marc was planning on working on Multiple selection https://bugs.eclipse.org/bugs/show_bug.cgi?id=330974
+
* CDT 8.6 release
−
** Mikhail mentioned that the Selection policy may be a problem
+
** [https://wiki.eclipse.org/CDT/Manual_Testing Joint testing] to be done
−
** Platform may require changes for selection policy
+
** We hope to have it done by the end of this week
−
** Already some selection policy problems are being seen
+
** Everything is on track for the release
−
** A good selection policy is important for usability, so it is important for the multi-selection feature
+
* Next CDT release to be 8.7
−
 
+
** Less than two months left until API freeze for Mars, and it does not seem anyone has plans or needs to break the API
−
* Debug testing for 4.2 ongoing.
+
** Doug [https://dev.eclipse.org/mhonarc/lists/cdt-dev/msg28861.html posted to the list] to see if there was any concerns about that
−
** Things look good for Tracepoints and Pin&Clon (which were broken with earlier builds of 4.2)
+
* CDT for Mars
−
** Reverse debugging buttons don't work properly with 4.2. Marc will report problems
+
** work continues for o.e.remote
−
 
+
** LaunchBar is being updated to follow o.e.remote new APIs
−
* Jason will not be able to work on multicore at this time because Sage needs all-stop for multicore debug, but CDT is more focused on non-stop.o
+
** Autotools will need to be updated as well
−
** Trying to get all-stop to work nicely with multicore may be something Sage can look at
+
** Still planning on removing CDT's dependency to RSE for Mars (Remote Debug launch)
−
 
+
** Connections should not be part of launch configuration as connections are user-specific. Instead using an OSGI service will be better.
−
''' Things post-Juno (Kepler) '''
+
* FindBugs
−
 
+
** Marc to post a patch to enable running FindBugs and PMD as a build profile.
−
* Marc's current plans is to focus on adding features to the multicore visualizer
+
** We can have the nightly build use that profile and see if that proves valuable.
−
 
+
** This will increase the build by about 20 minutes but provide valuable feedback
−
''' Architecture-specific visualization'''
+
** The verify job will not run FindBugs
−
* It was suggested that visualizations that are specific to different architectures (e.g., Tilera) could still be added to CDT.
+
* Visual Studio support contribution
−
** We can imagine having visualizations for many different architectures (Tilera, TI, Intel, etc)
+
** [https://dev.eclipse.org/mhonarc/lists/cdt-dev/msg28851.html Guy B offered to contribute] a Visual Studio integration to CDT
−
** This would allow users that have multiple different architectures without need to change their tool for each one
+
** Sounds like it can be interesting to some.
−
** Visualization is not the only factor however; connection with the backend (e.g., using GDB) may not be the same as what is in CDT.
+
** Guy was asked to open a bug to discuss the contribution process
−
 
+
== January 13th, 2015 ==
−
== March 13th, 2012 ==
+
  
 
=== Attendees ===
 
=== Attendees ===
  
−
# Norman Yee (Analog Devices)
+
# Alvaro Sanchez-Leon (Ericsson)
−
# Phil Mason (Broadcom)
+
# Marc Dumais (Ericsson)
 
# Mikhail Khodjaiants (Mentor)
 
# Mikhail Khodjaiants (Mentor)
−
# Bill Swanson (Tilera)
+
# Doug Schaefer (QNX)
 +
# Jeff Johnston (RedHat)
 +
# William Riley (Renesas)
 
# Marc Khouzam (Ericsson)
 
# Marc Khouzam (Ericsson)
  
 
=== Minutes ===
 
=== Minutes ===
−
 
+
* CDT Summit/CDT Day
−
'''Visualizer view '''
+
** CDT Summit wiki.  Please sign up.
−
* Visualizer examples plugin was added to CDT with two examples
+
** CDT Day planned. 7 talks on different topics related to CDT
−
** Problems Visualizer
+
* CDT 8.6 anything missing?
−
** SourceGraph Visualizer
+
** Nothing major planned for the last week
−
* The examples show different ways on how to extend the Visualizer framework.
+
* Register grouping committed. https://wiki.eclipse.org/CDT/User/NewIn86#Register_grouping
−
 
+
** VarObjects for Registers would be interesting.
−
'''Enhanced breakpoints'''
+
** If time allows, Mikhail may have a look again.
−
* We see that Pawel is making good progress
+
* All Debug JUnit tests running on HIPP using all of GDB >= 7.1
−
 
+
**  Local tests all pass: https://hudson.eclipse.org/cdt/job/debug-tests-master-all-gdb-versions/
−
'''Expressions view additions'''
+
** Remote tests down to 7 failures: https://hudson.eclipse.org/cdt/job/debug-remote-tests-master-all-gdb-versions/
−
* Pawel posted some comments/suggestions to the bug
+
* Older GDB support
−
 
+
** In some cases, probably with more recent GCCs, GDB 7.0 cannot step over printf (and maybe other issues)
−
'''Grouping'''
+
** We discussed and approved only supporting GDB 7.1 and higher
−
* Interest from Mentor, but nothing planned for the moment
+
** We won't remove the code supporting older GDBs but we won't work on making those work
−
 
+
** We will announce in N&N and make it part of the 8.6 review record
−
== February 14th, 2012 ==
+
* SWTBot testing for Debug/CDT https://git.eclipse.org/r/#/c/35988/
−
 
+
** Proof of concept that provides one test.
−
=== Attendees ===
+
** Marc K to review and commit very soon to get the infrastructure in
−
 
+
* LaunchBar will be part of Mars
−
# Phil Mason (Broadcom)
+
** Doug will work on a CDT remote launch using o.e.remote
−
# Eugene Ostroukhov (Nvidia)
+
** Doug got request to have a UI for multiple launches working with the launch bar
−
# Bruce Griffith (Sage)
+
* Launch UI
−
# Abeer Bagul (Tensilica)
+
** Mikhail has started work on it again
−
# Bill Swanson (Tilera)
+
−
# Randy Rohrbach (Windriver)
+
−
# Marc Khouzam (Ericsson)
+
−
 
+
−
=== Minutes ===
+
−
 
+
−
'''General'''
+
−
* Why not much focus on multi-vendor debug solution so that plugins from one vendor be used into another CDT installation?
+
−
** Probably not an interesting business case for vendors
+
−
** For others, they need to change the platform, so they can't work on someone else's IDE
+
−
* Marc will make time to review some contributions that are pending. Anyone else?
+
−
 
+
−
'''Visualizer view progress'''
+
−
* [http://bugs.eclipse.org/335027 Bug 335027]
+
−
* Feature has been contributed!
+
−
* Bill nominated as committer.
+
−
* New&Noteworthy http://wiki.eclipse.org/CDT/User/NewIn90#Multicore_Visualizer_View
+
−
* Multi-select feature would be very useful
+
−
 
+
−
'''Enhanced breakpoints'''
+
−
* Pawel and Randy are working on this.  Progress going well both in Platform and CDT
+
−
* Ability to create a breakpoint and specify its attributes at creation time
+
−
* Allowing to add more complex preferences to breakpoints
+
−
* Must verify how Tracepoints will be impacted
+
−
 
+
−
'''Expressions view additions'''
+
−
* Contribution bug will be posted soon
+
−
 
+
−
'''Grouping'''
+
−
* No update
+
−
 
+
−
== January 17th, 2012 ==
+
−
 
+
−
=== Attendees ===
+
−
 
+
−
# Norman Yee (Analog Devices)
+
−
# Phil Mason (Broadcom)
+
−
# Eugene Ostroukhov (Nvidia)
+
−
# Pete Macliesh (Tensilica)
+
−
# Abeer Bagul (Tensilica)
+
−
# Bill Swanson (Tilera)
+
−
# Doug Schaefer (Windriver)
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# Marc Khouzam (Ericsson)
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=== Minutes ===
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'''Visualizer view progress'''
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* [http://bugs.eclipse.org/335027 Bug 335027]
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* More feature have been added: selection, synchronization with Debug View, toolbar, context menu
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* Marc finishing some proposed refactoring before contribution is started
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* CQ should be opened this week to contribute.  Will go into master branch as an optional feature.
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* Demo was given.  Very cool!
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* Wasted space in visualizer view.  Can CPUs 'hug' Cores to avoid that waste?  Cores should stay square.
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* Need multi-selection run-control for visualizer [http://bugs.eclipse.org/330974 Bug 330974].  Marc will contact Dobrin to see if any progress was made.
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* This could apply to target management to show what is running on the target.  Would this be a second visualizer view for TM or a different visualizer in the same view?  This brings up the nice applicability of Pin&Clone.
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* Pin and clone would apply well to visualizer
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* How do we show process info in visualizer?
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** Process on cores don't really matter, what matters is what threads belong to the same process
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** brightness can be used to show all threads in the same process as the one selected
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'''Expressions view additions'''
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* Enhancement to allow the expressions view to use Working Sets.  The idea is to use Pin&Clone and Working sets to show only the expressions for a specific core (i.e. context)
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* Demo
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** Nice demo showing how working groups and pin&clone can be used to show a subset of expressions and pin them to a core
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** Working groups have been added to DSF and allow to filter the expressions view
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** Wizard was also added to create working groups and to easily pin them.
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* Abeer will open a bugzilla to contribute this feature to CDT.
+
  
 
= Older minutes of meeting =
 
= Older minutes of meeting =
  
 +
[[CDT/MultiCoreDebugWorkingGroup/calls/minutes/2014 | 2014 Minutes of meetings]]<br>
 +
[[CDT/MultiCoreDebugWorkingGroup/calls/minutes/2013 | 2013 Minutes of meetings]]<br>
 +
[[CDT/MultiCoreDebugWorkingGroup/calls/minutes/2012 | 2012 Minutes of meetings]]<br>
 
[[CDT/MultiCoreDebugWorkingGroup/calls/minutes/2011 | 2011 Minutes of meetings]]<br>
 
[[CDT/MultiCoreDebugWorkingGroup/calls/minutes/2011 | 2011 Minutes of meetings]]<br>
 
[[CDT/MultiCoreDebugWorkingGroup/calls/minutes/2010 | 2010 Minutes of meetings]]<br>
 
[[CDT/MultiCoreDebugWorkingGroup/calls/minutes/2010 | 2010 Minutes of meetings]]<br>

Revision as of 14:19, 9 June 2015

Multicore Debug Workgroup Minutes of Meetings

June 9th, 2015

Attendees

  1. Phil Mason (Broadcom)
  2. Marc Dumais (Ericsson)
  3. Jonah Graham (Kichwa Coders)
  4. Mikhail Khodjaiants (Mentor)
  5. Jeff Johnston (RedHat)
  6. William Riley (Renesas)
  7. Marc Khouzam (Ericsson)

Minutes

  • Mars release
    • William did the GDB Hardware debug testinging without any issues
  • RCP Standalone debugger
    • CDT's update site now has an rcp and rcp-repository directory. The first contains the RCP tar files, the second is update site for the RCP (that update site will make sense for future upgrades).
    • We plan on putting a direct link in CDT's download page to the RCP binaries and update site.
    • How can we advertise this?
    • Update N&N
    • Update Standalone debugger wiki page
    • Maybe Doug can blog about it?
    • We could put some info in the CDT documentation, although it is too late for 8.7
    • Is there a use case for the RCP Standalone debugger and the Standalone debugger scrip?
  • Remote debugging
    • GDB 7.10 will allow to use the remote binary even on the host.
      • Won't work for stripped remote binaries
      • Could be a problem if the bandwith between GDB and gdbserver is bad
      • CDT will need to allwo the user to choose between using the remote binary or not
      • https://bugs.eclipse.org/bugs/show_bug.cgi?id=400033#c46
      • The 'stripped' binary problem can apply to local attach, where the process could have been run using a stripped binary
    • Automatic remote debugging could provide an option to automatically strip the binary before uploading it to the target
  • Interrupting issues
    • On slow targets, interrupt can take a long enough time that the user presses interrupt a second time, which can kill GDB
    • CDT should disable the interrupt button when an interrupt is pending.
    • This was in the context of setting breakpoints which require CDT to interrupt the target
    • GDB requires we interrupt the target to set breakpoints only on linux and only for native (not using gdbserver). We will try to get this improved in GDB to not have this restriction and allow CDT to be simpler
  • Need to improve extensibility of DSF-GDB services Bug 469763
    • Example of current situation:
DSF-GDB provides: 
  GDBRunControl_7_2_NS extends GDBRunControl_7_0_NS
someone specializes this by creating
  MyPrivateGDBRunControl extends GDBRunControl_7_2_NS
The day that CDT adds a new version like
  GDBRunControl_7_9_NS extends GDBRunControl_7_2_NS
the extending class MyPrivateGDBRunControl will not use GDBRunControl_7_9_NS
unless the developer notices this new version. Both Mikhail and William confirmed
they regularly have this issue.

We propose to insert an empty class that will always be at the top.
Something like
  GDBRunControl_NS_Head extends GDBRunControl_7_2_NS
Extenders would use
  MyPrivateGDBRunControl extends GDBRunControl_NS_Head
When CDT wants to introduce GDBRunControl_7_9_NS, we would do it like this:
  GDBRunControl_NS_Head extends GDBRunControl_7_9_NS extends GDBRunControl_7_2_NS
which will allow MyPrivateGDBRunControl to automatically inherit from the new version.
This change need not break the API and could be done easily anytime.
  • Watchpoint using GDB's -location flag Bug 469764
    • Currently setting watchpoints to say ptr->a will cause the watchpoint to follow the expression.
    • If the value of ptr changes, the watchpoint will hit
    • Often, the user wants to know if the original ptr->a changes
    • GDB offers this by using the 'watch -location' flag
    • CDT should offer access to that
    • Jonah has confirmed that to workaround this limitation he has to first find the address of ptr->a and use that hard coded address to set the wathpoint

May 12th, 2015

Attendees

  1. Andrew McLachlan (Analog Devices)
  2. Phil Mason (Broadcom)
  3. Alvaro Sanchez-Leon (Ericsson)
  4. Marc Dumais (Ericsson)
  5. Mikhail Khodjaiants (Mentor)
  6. William Riley (Renesas)
  7. Marc Khouzam (Ericsson)

Minutes

  • Mars release
    • 8.7 branch created. Bugs should be committed to both cdt_8_7 and master
  • Standalone debugger fails to launch with M6 Bug 467109
    • Marc K sees this on his machine. Alvaro to try on his machine to confirm
  • RCP Standalone debugger
    • Separate download to install
    • Easy to get working
    • Easy way to get users to use Eclipse without any setup
    • Patch under review
  • Docker contribution
    • Waiting for IP approval CORRECTION after meeting: IP Approval received. Contribution to Linux Tools done for M7. Contribution to CDT being updated for RC1
    • Plugins in LinuxTools to support Docker containers
    • Patch proposed for CDT to launch a binary inside a Docker container (similar to remote debugging)
    • Would be an optional feature of CDT
  • Register Grouping and Variable Objects for registers
    • Mikhail has continued work on this patch but has no time currently
    • Trying a new registers service with a second service on top to do the grouping
    • What are the registers listed that don't have names given by GDB?
    • We can fetch the values using -data-list-register-values and the index, but we don't have a name for the user
    • Without a name, it does not seem valuable for a user
    • Can't use varObj with this also, as it needs a name
  • RunControl Grouping
    • Marc K working on reviving Dobrin's grouping patch
    • Final goal is to support GDB's planned ITSet grouping feature
  • Showing Exited processes
  • Other
    • GDB has a format to pad hex output with 0s. This can be useful especially for registers
    • Should CDT use it? Should it be another optional format for the user to choose from?

March 17th, 2015

Attendees

  1. Andrew McLachlan (Analog Devices)
  2. Phil Mason (Broadcom)
  3. Alvaro Sanchez-Leon (Ericsson)
  4. Marc-Andre Laperle (Ericsson)
  5. Marc Dumais (Ericsson)
  6. Mikhail Khodjaiants (Mentor)
  7. Doug Schaefer (QNX)
  8. William Riley (Renesas)
  9. Marc Khouzam (Ericsson)

Minutes

  • Summary of CDT Summit/CDT Day/EclipseCon
    • Java 8
    • do we do it on master, it will break java 7, it should be done on the 9_0 branch
    • email to the list
  • cdt 9.0 for Mars+1 release (June 2016)
    • 9_0 branch where API breaking changes are allowed
  • Doug plans to split out native plugins into their own git repo and build them separately to provide them to others that should not depend on CDT
  • CDT 8.7 plans
    • Grouping feature to support
      • Marc K has started looking at this again, based on the work from TI
    • Memory view fixes/improvements
      • Alvaro working on this
    • VarObjects for Registers would be interesting.
      • Currently we assume every register is under a group, but it may not be the right thing to do
  • Enhancement bug written to LaunchBar allowing to handle multiple launches/launch group http://eclip.se/462372
    • Mikhail has a patch that removes some duplications in the debug view in the case of the launch group
  • Patches needing review
    • A couple of breakpoint patches from Mikhail
    • William submitted a patch for managed build, will email the list to get noticed

February 5th, 2015

Attendees

  1. Phil Mason (Broadcom)
  2. Alvaro Sanchez-Leon (Ericsson)
  3. Marc Dumais (Ericsson)
  4. Mikhail Khodjaiants (Mentor)
  5. Vladimir Prus (Mentor)
  6. Doug Schaefer (QNX)
  7. Jeff Johnston (RedHat)
  8. Marc Khouzam (Ericsson)

Minutes

  • CDT Summit/CDT Day
    • Planning continues. 10 attendees have signed up so far. Based on last year, we expect more though
  • CDT 8.6 release
    • Joint testing to be done
    • We hope to have it done by the end of this week
    • Everything is on track for the release
  • Next CDT release to be 8.7
    • Less than two months left until API freeze for Mars, and it does not seem anyone has plans or needs to break the API
    • Doug posted to the list to see if there was any concerns about that
  • CDT for Mars
    • work continues for o.e.remote
    • LaunchBar is being updated to follow o.e.remote new APIs
    • Autotools will need to be updated as well
    • Still planning on removing CDT's dependency to RSE for Mars (Remote Debug launch)
    • Connections should not be part of launch configuration as connections are user-specific. Instead using an OSGI service will be better.
  • FindBugs
    • Marc to post a patch to enable running FindBugs and PMD as a build profile.
    • We can have the nightly build use that profile and see if that proves valuable.
    • This will increase the build by about 20 minutes but provide valuable feedback
    • The verify job will not run FindBugs
  • Visual Studio support contribution
    • Guy B offered to contribute a Visual Studio integration to CDT
    • Sounds like it can be interesting to some.
    • Guy was asked to open a bug to discuss the contribution process

January 13th, 2015

Attendees

  1. Alvaro Sanchez-Leon (Ericsson)
  2. Marc Dumais (Ericsson)
  3. Mikhail Khodjaiants (Mentor)
  4. Doug Schaefer (QNX)
  5. Jeff Johnston (RedHat)
  6. William Riley (Renesas)
  7. Marc Khouzam (Ericsson)

Minutes

  • CDT Summit/CDT Day
    • CDT Summit wiki. Please sign up.
    • CDT Day planned. 7 talks on different topics related to CDT
  • CDT 8.6 anything missing?
    • Nothing major planned for the last week
  • Register grouping committed. https://wiki.eclipse.org/CDT/User/NewIn86#Register_grouping
    • VarObjects for Registers would be interesting.
    • If time allows, Mikhail may have a look again.
  • All Debug JUnit tests running on HIPP using all of GDB >= 7.1
  • Older GDB support
    • In some cases, probably with more recent GCCs, GDB 7.0 cannot step over printf (and maybe other issues)
    • We discussed and approved only supporting GDB 7.1 and higher
    • We won't remove the code supporting older GDBs but we won't work on making those work
    • We will announce in N&N and make it part of the 8.6 review record
  • SWTBot testing for Debug/CDT https://git.eclipse.org/r/#/c/35988/
    • Proof of concept that provides one test.
    • Marc K to review and commit very soon to get the infrastructure in
  • LaunchBar will be part of Mars
    • Doug will work on a CDT remote launch using o.e.remote
    • Doug got request to have a UI for multiple launches working with the launch bar
  • Launch UI
    • Mikhail has started work on it again

Older minutes of meeting

2014 Minutes of meetings
2013 Minutes of meetings
2012 Minutes of meetings
2011 Minutes of meetings
2010 Minutes of meetings

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