[Mono-dev] Soft Debugger issues (can't suspend threads in wait_for_suspend)
I am having trouble with mono soft debugger. - I embed Mono runtime in my program, and I got MonoDevelop to act as SoftDebugger client - Mono soft debugger is loading properly (first breakpoint usually works -- if already set beforehand -- I can see callstacks, etc...) - As soon as I press F5 -- to execute until this breakpoint is reached again next iteration -- or if I disable/reenable this breakpoint, program hang (see log) - Main loop is in C and Mono functions are called regularly. I traced down the problem to thread(s) not suspending (cf log). Usually, it seems it is the Finalizer thread (in this case 2054) that doesn't get suspended. In mono sources, I tried to call mono_gc_collect/mono_gc_invoke_finalizers in the suspend_thread loop. In that case, I can manage to have F5 working (breakpoint trigger every step inside the loop). However it doesn't work as soon as I do anything else (such as removing adding again the breakpoint). I remember seeing this problem on more than 1 thread when I had other threads active (i.e. Waiting for 3(4) threads to suspend...) Does anyone have an idea? Maybe there is something special to do if Mono doesn't keep hand (often back to full unmanaged world since main loop is in C) Debugger log: [0410] Thread started, obj=04702F20, tls=004CDA60. [0410] Suspended. [0410] Resumed. [0410] Suspending vm... [0410] Sent event VM_START, suspend=2. [0410] Suspended. [dbg] Agent thread started, pid=1260 [2054] Thread started, obj=04702E70, tls=004EC1D8. Finalizer thread [2054] Suspended. [dbg] Received command VM(VERSION), id=1. [dbg] Received command VM(SET_PROTOCOL_VERSION), id=2. [dbg] Protocol version 2.2, client protocol version 2.2. [dbg] Received command APPDOMAIN(1), id=3. ... [0410] Suspended. [dbg] Received command TYPE(1), id=1785. [dbg] Received command TYPE(6), id=1786. [2054] Received single step event for suspending. [2054] Suspended. [dbg] Received command VM(RESUME), id=1787. [1260] Resuming vm... [2054] Resumed. [0410] Resumed. [0410] Suspending vm... [0410] Interrupting 2054... [0410] Sent event TYPE_LOAD, suspend=2. [0410] Suspended. [dbg] Received command TYPE(1), id=1788. [dbg] Received command TYPE(6), id=1789. [2054] Received single step event for suspending. [2054] Suspended. [dbg] Received command VM(RESUME), id=1790. [1260] Resuming vm... [2054] Resumed. [0410] Resumed. [0410] Suspending vm... [0410] Interrupting 2054... [0410] Sent event TYPE_LOAD, suspend=2. [0410] Suspended. [dbg] Received command TYPE(1), id=1791. [dbg] Received command TYPE(6), id=1792. [dbg] Received command VM(RESUME), id=1793. [2054] Received single step event for suspending. [2054] Suspended. [1260] Resuming vm... [0410] Resumed. [2054] Resumed. [0410] Suspending vm... [0410] Interrupting 2054... [0410] Sent event TYPE_LOAD, suspend=2. [0410] Suspended. [dbg] Received command TYPE(1), id=1794. [dbg] Received command TYPE(6), id=1795. [dbg] Received command VM(RESUME), id=1796. [1260] Resuming vm... [0410] Resumed. [0410] Breakpoint hit, method=Step, offset=0x1e. [0410] Suspending vm... [0410] Interrupting 2054... [0410] Sent event BREAKPOINT, suspend=2. [0410] Suspended. [dbg] Received command VM(ALL_THREADS), id=1797. [dbg] Received command THREAD(1), id=1798. Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Soft Debugger issues (can't suspend threads in wait_for_suspend)
Just as a small addition, to confirm what I said earlier concerning situation with additional threads. After adding 2 threads that don't actually call mono (simply register them with mono_thread_attach(mono_get_root_domain())), I end up having: Waiting for 2(4) threads to suspend... which mean 1 of the fully native threads is also blocking it. Maybe it can't detect well when threads are running in native mode? I will continue to investigate as well. On Wed, Jan 26, 2011 at 12:58 AM, Virgile Bello virgile.be...@gmail.comwrote: I am having trouble with mono soft debugger. - I embed Mono runtime in my program, and I got MonoDevelop to act as SoftDebugger client - Mono soft debugger is loading properly (first breakpoint usually works -- if already set beforehand -- I can see callstacks, etc...) - As soon as I press F5 -- to execute until this breakpoint is reached again next iteration -- or if I disable/reenable this breakpoint, program hang (see log) - Main loop is in C and Mono functions are called regularly. I traced down the problem to thread(s) not suspending (cf log). Usually, it seems it is the Finalizer thread (in this case 2054) that doesn't get suspended. In mono sources, I tried to call mono_gc_collect/mono_gc_invoke_finalizers in the suspend_thread loop. In that case, I can manage to have F5 working (breakpoint trigger every step inside the loop). However it doesn't work as soon as I do anything else (such as removing adding again the breakpoint). I remember seeing this problem on more than 1 thread when I had other threads active (i.e. Waiting for 3(4) threads to suspend...) Does anyone have an idea? Maybe there is something special to do if Mono doesn't keep hand (often back to full unmanaged world since main loop is in C) Debugger log: [0410] Thread started, obj=04702F20, tls=004CDA60. [0410] Suspended. [0410] Resumed. [0410] Suspending vm... [0410] Sent event VM_START, suspend=2. [0410] Suspended. [dbg] Agent thread started, pid=1260 [2054] Thread started, obj=04702E70, tls=004EC1D8. Finalizer thread [2054] Suspended. [dbg] Received command VM(VERSION), id=1. [dbg] Received command VM(SET_PROTOCOL_VERSION), id=2. [dbg] Protocol version 2.2, client protocol version 2.2. [dbg] Received command APPDOMAIN(1), id=3. ... [0410] Suspended. [dbg] Received command TYPE(1), id=1785. [dbg] Received command TYPE(6), id=1786. [2054] Received single step event for suspending. [2054] Suspended. [dbg] Received command VM(RESUME), id=1787. [1260] Resuming vm... [2054] Resumed. [0410] Resumed. [0410] Suspending vm... [0410] Interrupting 2054... [0410] Sent event TYPE_LOAD, suspend=2. [0410] Suspended. [dbg] Received command TYPE(1), id=1788. [dbg] Received command TYPE(6), id=1789. [2054] Received single step event for suspending. [2054] Suspended. [dbg] Received command VM(RESUME), id=1790. [1260] Resuming vm... [2054] Resumed. [0410] Resumed. [0410] Suspending vm... [0410] Interrupting 2054... [0410] Sent event TYPE_LOAD, suspend=2. [0410] Suspended. [dbg] Received command TYPE(1), id=1791. [dbg] Received command TYPE(6), id=1792. [dbg] Received command VM(RESUME), id=1793. [2054] Received single step event for suspending. [2054] Suspended. [1260] Resuming vm... [0410] Resumed. [2054] Resumed. [0410] Suspending vm... [0410] Interrupting 2054... [0410] Sent event TYPE_LOAD, suspend=2. [0410] Suspended. [dbg] Received command TYPE(1), id=1794. [dbg] Received command TYPE(6), id=1795. [dbg] Received command VM(RESUME), id=1796. [1260] Resuming vm... [0410] Resumed. [0410] Breakpoint hit, method=Step, offset=0x1e. [0410] Suspending vm... [0410] Interrupting 2054... [0410] Sent event BREAKPOINT, suspend=2. [0410] Suspended. [dbg] Received command VM(ALL_THREADS), id=1797. [dbg] Received command THREAD(1), id=1798. Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Soft Debugger issues (can't suspend threads in wait_for_suspend)
Sorry, last small update, if I simply disable the waiting loop in wait_for_suspend() and make is_suspended() always return TRUE, breakpoints/tracing work as expected (except maybe playing with other threads of course). This seems to confirm there might be some false positive when trying to detect threads that run in native mode (mono think they are managed). On Wed, Jan 26, 2011 at 1:06 AM, Virgile Bello virgile.be...@gmail.comwrote: Just as a small addition, to confirm what I said earlier concerning situation with additional threads. After adding 2 threads that don't actually call mono (simply register them with mono_thread_attach(mono_get_root_domain())), I end up having: Waiting for 2(4) threads to suspend... which mean 1 of the fully native threads is also blocking it. Maybe it can't detect well when threads are running in native mode? I will continue to investigate as well. On Wed, Jan 26, 2011 at 12:58 AM, Virgile Bello virgile.be...@gmail.comwrote: I am having trouble with mono soft debugger. - I embed Mono runtime in my program, and I got MonoDevelop to act as SoftDebugger client - Mono soft debugger is loading properly (first breakpoint usually works -- if already set beforehand -- I can see callstacks, etc...) - As soon as I press F5 -- to execute until this breakpoint is reached again next iteration -- or if I disable/reenable this breakpoint, program hang (see log) - Main loop is in C and Mono functions are called regularly. I traced down the problem to thread(s) not suspending (cf log). Usually, it seems it is the Finalizer thread (in this case 2054) that doesn't get suspended. In mono sources, I tried to call mono_gc_collect/mono_gc_invoke_finalizers in the suspend_thread loop. In that case, I can manage to have F5 working (breakpoint trigger every step inside the loop). However it doesn't work as soon as I do anything else (such as removing adding again the breakpoint). I remember seeing this problem on more than 1 thread when I had other threads active (i.e. Waiting for 3(4) threads to suspend...) Does anyone have an idea? Maybe there is something special to do if Mono doesn't keep hand (often back to full unmanaged world since main loop is in C) Debugger log: [0410] Thread started, obj=04702F20, tls=004CDA60. [0410] Suspended. [0410] Resumed. [0410] Suspending vm... [0410] Sent event VM_START, suspend=2. [0410] Suspended. [dbg] Agent thread started, pid=1260 [2054] Thread started, obj=04702E70, tls=004EC1D8. Finalizer thread [2054] Suspended. [dbg] Received command VM(VERSION), id=1. [dbg] Received command VM(SET_PROTOCOL_VERSION), id=2. [dbg] Protocol version 2.2, client protocol version 2.2. [dbg] Received command APPDOMAIN(1), id=3. ... [0410] Suspended. [dbg] Received command TYPE(1), id=1785. [dbg] Received command TYPE(6), id=1786. [2054] Received single step event for suspending. [2054] Suspended. [dbg] Received command VM(RESUME), id=1787. [1260] Resuming vm... [2054] Resumed. [0410] Resumed. [0410] Suspending vm... [0410] Interrupting 2054... [0410] Sent event TYPE_LOAD, suspend=2. [0410] Suspended. [dbg] Received command TYPE(1), id=1788. [dbg] Received command TYPE(6), id=1789. [2054] Received single step event for suspending. [2054] Suspended. [dbg] Received command VM(RESUME), id=1790. [1260] Resuming vm... [2054] Resumed. [0410] Resumed. [0410] Suspending vm... [0410] Interrupting 2054... [0410] Sent event TYPE_LOAD, suspend=2. [0410] Suspended. [dbg] Received command TYPE(1), id=1791. [dbg] Received command TYPE(6), id=1792. [dbg] Received command VM(RESUME), id=1793. [2054] Received single step event for suspending. [2054] Suspended. [1260] Resuming vm... [0410] Resumed. [2054] Resumed. [0410] Suspending vm... [0410] Interrupting 2054... [0410] Sent event TYPE_LOAD, suspend=2. [0410] Suspended. [dbg] Received command TYPE(1), id=1794. [dbg] Received command TYPE(6), id=1795. [dbg] Received command VM(RESUME), id=1796. [1260] Resuming vm... [0410] Resumed. [0410] Breakpoint hit, method=Step, offset=0x1e. [0410] Suspending vm... [0410] Interrupting 2054... [0410] Sent event BREAKPOINT, suspend=2. [0410] Suspended. [dbg] Received command VM(ALL_THREADS), id=1797. [dbg] Received command THREAD(1), id=1798. Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... Waiting for 1(2) threads to suspend... ___
Re: [Mono-dev] Soft Debugger issues (can't suspend threads in wait_for_suspend)
Turns out it might be due to Win32 limitations (QueueUserAPC works only if SleepEx/WaitForMultipleObjectsEx etc... are used), as notify_thread_apc is never called back. I can fix that on my own threads. However, finalizer thread should use such functions as well otherwise it will always hang internally. Sorry for the trouble. On Wed, Jan 26, 2011 at 1:26 AM, Virgile Bello virgile.be...@gmail.comwrote: Sorry, last small update, if I simply disable the waiting loop in wait_for_suspend() and make is_suspended() always return TRUE, breakpoints/tracing work as expected (except maybe playing with other threads of course). This seems to confirm there might be some false positive when trying to detect threads that run in native mode (mono think they are managed). On Wed, Jan 26, 2011 at 1:06 AM, Virgile Bello virgile.be...@gmail.comwrote: Just as a small addition, to confirm what I said earlier concerning situation with additional threads. After adding 2 threads that don't actually call mono (simply register them with mono_thread_attach(mono_get_root_domain())), I end up having: Waiting for 2(4) threads to suspend... which mean 1 of the fully native threads is also blocking it. Maybe it can't detect well when threads are running in native mode? I will continue to investigate as well. On Wed, Jan 26, 2011 at 12:58 AM, Virgile Bello virgile.be...@gmail.comwrote: I am having trouble with mono soft debugger. - I embed Mono runtime in my program, and I got MonoDevelop to act as SoftDebugger client - Mono soft debugger is loading properly (first breakpoint usually works -- if already set beforehand -- I can see callstacks, etc...) - As soon as I press F5 -- to execute until this breakpoint is reached again next iteration -- or if I disable/reenable this breakpoint, program hang (see log) - Main loop is in C and Mono functions are called regularly. I traced down the problem to thread(s) not suspending (cf log). Usually, it seems it is the Finalizer thread (in this case 2054) that doesn't get suspended. In mono sources, I tried to call mono_gc_collect/mono_gc_invoke_finalizers in the suspend_thread loop. In that case, I can manage to have F5 working (breakpoint trigger every step inside the loop). However it doesn't work as soon as I do anything else (such as removing adding again the breakpoint). I remember seeing this problem on more than 1 thread when I had other threads active (i.e. Waiting for 3(4) threads to suspend...) Does anyone have an idea? Maybe there is something special to do if Mono doesn't keep hand (often back to full unmanaged world since main loop is in C) Debugger log: [0410] Thread started, obj=04702F20, tls=004CDA60. [0410] Suspended. [0410] Resumed. [0410] Suspending vm... [0410] Sent event VM_START, suspend=2. [0410] Suspended. [dbg] Agent thread started, pid=1260 [2054] Thread started, obj=04702E70, tls=004EC1D8. Finalizer thread [2054] Suspended. [dbg] Received command VM(VERSION), id=1. [dbg] Received command VM(SET_PROTOCOL_VERSION), id=2. [dbg] Protocol version 2.2, client protocol version 2.2. [dbg] Received command APPDOMAIN(1), id=3. ... [0410] Suspended. [dbg] Received command TYPE(1), id=1785. [dbg] Received command TYPE(6), id=1786. [2054] Received single step event for suspending. [2054] Suspended. [dbg] Received command VM(RESUME), id=1787. [1260] Resuming vm... [2054] Resumed. [0410] Resumed. [0410] Suspending vm... [0410] Interrupting 2054... [0410] Sent event TYPE_LOAD, suspend=2. [0410] Suspended. [dbg] Received command TYPE(1), id=1788. [dbg] Received command TYPE(6), id=1789. [2054] Received single step event for suspending. [2054] Suspended. [dbg] Received command VM(RESUME), id=1790. [1260] Resuming vm... [2054] Resumed. [0410] Resumed. [0410] Suspending vm... [0410] Interrupting 2054... [0410] Sent event TYPE_LOAD, suspend=2. [0410] Suspended. [dbg] Received command TYPE(1), id=1791. [dbg] Received command TYPE(6), id=1792. [dbg] Received command VM(RESUME), id=1793. [2054] Received single step event for suspending. [2054] Suspended. [1260] Resuming vm... [0410] Resumed. [2054] Resumed. [0410] Suspending vm... [0410] Interrupting 2054... [0410] Sent event TYPE_LOAD, suspend=2. [0410] Suspended. [dbg] Received command TYPE(1), id=1794. [dbg] Received command TYPE(6), id=1795. [dbg] Received command VM(RESUME), id=1796. [1260] Resuming vm... [0410] Resumed. [0410] Breakpoint hit, method=Step, offset=0x1e. [0410] Suspending vm... [0410] Interrupting 2054... [0410] Sent event BREAKPOINT, suspend=2. [0410] Suspended. [dbg] Received command VM(ALL_THREADS), id=1797. [dbg] Received command THREAD(1), id=1798. Waiting for 1(2) threads to suspend... Waiting
[Mono-dev] AOT + the osx installer.
When I build mono from source and install on linux, I've noticed that I end up with .so's next to some of the installed dll's and exe's. This provides a nice speedup when running compilers/tools from the mono distribution. Now that we have AOT working on osx, the same optimization makes sense there, too. I decided to try this out with mono 2.8.2 on an intel mac. I manually AOT'd: /Library/Frameworks/Mono.Framework/Versions/Current/lib/mono/*/*.exe /Library/Frameworks/Mono.Framework/Versions/Current/lib/mono/gac/*/*/*.dll I have a project that is about 500kloc of C# and builds with gmcs. AOT'ing the mono distribution as I've described dropped the build time for this project from 84s to 46s on my c2d macbook pro. This is a 44% speedup! I'm unsure who owns the OSX build/packaging, but it seems like this should be a simple change to make since we already do it on linux, and it would be great to get this kind of performance out of the box. ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] AOT + the osx installer.
Hello, I'm unsure who owns the OSX build/packaging, but it seems like this should be a simple change to make since we already do it on linux, and it would be great to get this kind of performance out of the box. It would consume more disk space. Perhaps we could provide the option for the user to toggle those on and off at install time. Miguel ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] AOT + the osx installer.
Hello, On 2011-01-25, at 4:39 PM, Brian Luczkiewicz wrote: When I build mono from source and install on linux, I've noticed that I end up with .so's next to some of the installed dll's and exe's. This provides a nice speedup when running compilers/tools from the mono distribution. Now that we have AOT working on osx, the same optimization makes sense there, too. I decided to try this out with mono 2.8.2 on an intel mac. I manually AOT'd: /Library/Frameworks/Mono.Framework/Versions/Current/lib/mono/*/*.exe /Library/Frameworks/Mono.Framework/Versions/Current/lib/mono/gac/*/*/*.dll I have a project that is about 500kloc of C# and builds with gmcs. AOT'ing the mono distribution as I've described dropped the build time for this project from 84s to 46s on my c2d macbook pro. This is a 44% speedup! This is great news, as we just recently enabled this. Was this with LLVM or with the regular AOT? -g ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
[Mono-dev] C++ Interop
It was with great interest I read about the upcoming FOSDEM presentation on Mono C++ Interop. I was unaware such an project had been started. I looked at http://www.mono-project.com/Interop_with_Native_Libraries and http://www.mono-project.com/CPlusPlus and didn't see any mention of it. Is the result of the summer-of-code project documented somewhere? Many thanks, Sebastian ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] C++ Interop
On Tue, Jan 25, 2011 at 5:54 PM, Sebastian Good sebast...@palladiumconsulting.com wrote: It was with great interest I read about the upcoming FOSDEM presentation on Mono C++ Interop. I was unaware such an project had been started. I looked at http://www.mono-project.com/Interop_with_Native_Libraries and http://www.mono-project.com/CPlusPlus and didn't see any mention of it. Is the result of the summer-of-code project documented somewhere? I am also excited to hear about this talk. There isn't much written documentation on the project yet, though perhaps the pages you mention should be updated to mention it. For now, there's the code at https://github.com/nirvanai/cppinterop, which holds the work I've done over the summer and since. I'd also be happy to answer any questions about it. Best, Alex Corrado ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
