CDT/summitfall2008/Debug Session

Note: The contents of this page refer to a past CDT summit. For information on other and possible upcoming summits visit CDT/summits

CDI / DSF feature list

• Launching
  • • CDI
      • Support for use-selectable MI protocol versions
      • Supports suspending on shared library events
        • In DSF, this feature should be supported using event breakpoints bug 248587.
    • DSF
      • Detects GDB version at launch time, but has support for only v6.6+
  • Local
    • CDI
      • Supports setting environment variables (DSF: bug 248591)
  • Attach
  • Remote
    • DSF
      • Has explicit launch configuration for remote launch, which is less confusing to users
  • JTAG
    • CDI
      • Custom UI for configuring gdbserver for JTAG debugging. (DSF bug 248593)
  • Post Mortem
    • CDI
      • Feature supported (DSF: bug 202346).
• Breakpoints
  • • CDI
      • Emulates pending breakpoints (loading breakpoints on shared library events). (DSF: bug 248595)
  • Breakpoint Actions
    • CDI
      • Has more actions which use CDI model objects.
    • DSF
      • Does support actions.
      • Remaining issues in bug 228703
  • Menu Actions
    • CDI
      • Toggle support in Variables views. (DSF: bug 248606)
  • Types
    • CDI
      • Event breakpoints are supported. (DSF: bug 248587)
• Debug view
  • • CDI
      • Show full path (for stack frame file names) (DSF: bug 248627)
    • DSF
      • Retrieving limited # of frames
  • Run control
    • CDI
      • Set PC to here (DSF: bug 249162).
      • Run to line (DSF: bug 233230)
      • Resume at line (DSF: bug 248165).
    • DSF
      • Stepping speed throttling
  • Non-stop Multi-threading
    • DSF
      • Supported with GDB 7+
  • Multi-process
    • DSF
      • Supported with GDB 7+
      • Attach to multiple processes after launch
• All variables views
  • • CDI
      • Cast to type. (DFE: bug 219203)
      • Display as array. (DFE: also bug 219203)
      • Show in memory. (DSF: bug 248610)
      • Number format for individual items. (DSF: bug 202556).
      • Detail pane uses a different expression evaluation. (DSF: bug 249169)
    • DSF
      • Set number format for the whole view.
      • Has a show all number formats detail pane.
• Registers
  • Groups
    • CDI
      • User defined groups. (DFE: bug 235747)
• Variables
  • • CDI
      • Add selected global variables. (DFE: bug 219040)
• Expressions
  • • DSF
      • Same variable/register support as in their native views
        • inline editing
        • columns
        • etc.
      • Inline editing of expressions
• Modules
  • • CDI
      • Browsing symbols parsed by the IDE. (DFE: bug 159958)
• Signals
  • • CDI
      • Resume without signal (DFE: bug 249223)
      • Signal view (DFE: bug 249220)
• Disassembly
  • • DSF
      • Toni's disassembly view.
• Console
  • • CDI
      • Verbose mode to show all GDB protocol traffic. (DFE: bug 249227).
      • Save console content.
• Source Lookup
  • • CDI
      • Has enhanced source not found editor. (DFE: bug 159955).
• View update modes
  • • CDI
      • Allows disabling retrieving register or variable updates entirely at launch time
      • Allows user to enable/disable updates of individual registers/register groups/variables through a context menu item
    • DSF
      • User-selected update modes for individual views.
      • Manual refresh button.
      • Debug view: manual refresh mode for list of threads.
      • Force non-lazy mode updating.

CDI/DSF coexistence

• Convert common actions to the command framework.
• Have common commands, but use different handlers for the different models where appropriate.
• Hide actions based on active debug context where appropriate.

Memory rendering

• Ted will try to contribute the traditional rendering to platform.
  • There are possible issues with the rendering being extendible.
  • If the contribution is not acceptable for platform we can contribute it to CDT.

Breakpoint actions -> platform

• Nokia to create a patch for platform
  • Need to fix minor known bugs
  • Need to evaluate API footprint, consider using command framework to avoid adding a new extension point for actions.
  • Need a reference implementation for JDT or PDA example
• Pawel will review the contribution

Disassembly

• If instruction stepping mode is on, disassembly should be shown by default.
• If disassembly view is opened, instruction stepping mode should turn on by default.
• If the disassembly is opened because file didn't have source for a function, when debugger steps out of that function the editor should be shown again.

TCF

• Bring it in:
  • Need to investigate if there are any build issues?
  • Nokia and possibly Freescale would contribute development to it.
  • Wind River can support DSF-TCF development just like DSF-GDB.

Launch

• Support multiple debugger types (DSF, CDI, TCF, etc) through different launch delegates registered for the same launch configuration type.
• Three basic launch types:
  • New Process
  • Attach to Process
  • Post mortem
• Rename "C/C++ Local Application" -> "C/C++ Application"
• Launch Wizard

Supported GDB versions

• DSF
  • Supports v6.7+
  • Supports Linux and mingw
• CDI
  • "works" with v5.2.1
  • QNX has the only active committer and will triage bugs
  • Mikhail will review bug fixes to help avoid breaking old versions