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Home » Community » U++ community news and announcements » Upp 2007.1beta2 released
Re: Upp 2007.1beta2 released [message #7889 is a reply to message #7853] Mon, 29 January 2007 11:15 Go to previous messageGo to previous message
piotr5 is currently offline  piotr5
Messages: 107
Registered: November 2005
Experienced Member
Thanks. another bug I found is that single-file packages don't
get linked into a lib, even though the final link-command does
expect *.a instead of *.o. but this bug is also present in
older versions and I simply ignored it...

but back to the hydra-problem: I tried to debug the "waiting",
and it turned out that waitpid did keep returning -1 to
indicate an error (errno 10, "child does not exist" or something)
while Web/sproc.cpp did interprete this as "child hasn't
exited yes".

the debug-session did look like this:

GNU gdb 2003-02-03-cvs
...
Console::Wait() (this=0xbffeebb8)
    at /home/p/upp/uvs/upp-uvs/ide/Console.cpp:252
252		for(;;) {
(gdb) 
253			ProcessEvents();
(gdb) 
254			switch(Flush()) {
(gdb) 
256				case  0: sleep = min(sleep + 5, 20); break;
(gdb) 
259			Ctrl::GuiSleep(sleep);
(gdb) 
252		for(;;) {
(gdb) 
253			ProcessEvents();
(gdb) 
254			switch(Flush()) {
(gdb) s
Console::Flush() (this=0xbffeebb8)
    at /home/p/upp/uvs/upp-uvs/ide/Console.cpp:67
67		bool done_output = false;
(gdb) n
...
85		for(int i = 0; i < processes.GetCount(); i++) {
(gdb) 
86			Slot& slot = processes[i];
(gdb) 
87			if(!slot.process)
(gdb) 
88				continue;
(gdb) 
85		for(int i = 0; i < processes.GetCount(); i++) {
(gdb) 
86			Slot& slot = processes[i];
(gdb) 
87			if(!slot.process)
(gdb) 
89			String s;
(gdb) 
90			slot.process->Read(s);
(gdb) 
91			if(!IsNull(s)) {
(gdb) 
104			if(!slot.process->IsRunning()) {
(gdb) s
Upp::One<Upp::SlaveProcess>::operator->() (this=0x886d490)
    at /home/p/upp/uvs/upp-uvs/Core/Other.h:30
30		T          *operator->()               { ChkP(); 
...
Upp::LocalSlaveProcess::IsRunning() (this=0x94c5e80)
    at /home/p/upp/uvs/upp-uvs/Web/sproc.cpp:358
358		if(!pid || !IsNull(exit_code)) {
(gdb) n
362		int status = 0, wp;
(gdb) 
363		if((wp = waitpid(pid, &status, WNOHANG | WUNTRACED)) != pid || !DecodeExitCode(status))
(gdb) s
364			return true;
(gdb) p wp
$1 = -1
(gdb) p status
$2 = 0
(gdb) p pid
$3 = 905
(gdb) n
368	}
(gdb) 
Console::Flush() (this=0xbffeebb8)
    at /home/p/upp/uvs/upp-uvs/ide/Console.cpp:114
114			running = true;
(gdb) n
85		for(int i = 0; i < processes.GetCount(); i++) {
(gdb) p processes
$4 = {<MoveableAndDeepCopyOption<Upp::Array<Console::Slot>,Upp::EmptyClass>> = {<Moveable<Upp::Array<Console::Slot>,Upp::DeepCopyOption<Upp::Array<Console::Slot>, Upp::EmptyClass> >> = {<DeepCopyOption<Upp::Array<Console::Slot>,Upp::EmptyClass>> = {<EmptyClass> = {<No data fields>}, <No data fields>}, <No data fields>}, <No data fields>}, 
  vector = {<MoveableAndDeepCopyOption<Upp::Vector<void*>,Upp::EmptyClass>> = {<Moveable<Upp::Vector<void*>,Upp::DeepCopyOption<Upp::Vector<void*>, Upp::EmptyClass> >> = {<DeepCopyOption<Upp::Vector<void*>,Upp::EmptyClass>> = {<EmptyClass> = {<No data fields>}, <No data fields>}, <No data fields>}, <No data fields>}, 
    vector = 0x886d480, items = 2, alloc = 2}}
(gdb) p processes[0]
$5 = (Slot &) @0x8815b80: {
  process = {<MoveableAndDeepCopyOption<Upp::One<Upp::SlaveProcess>,Upp::EmptyClass>> = {<Moveable<Upp::One<Upp::SlaveProcess>,Upp::DeepCopyOption<Upp::One<Upp::SlaveProcess>, Upp::EmptyClass> >> = {<DeepCopyOption<Upp::One<Upp::SlaveProcess>,Upp::EmptyClass>> = {<EmptyClass> = {<No data fields>}, <No data fields>}, <No data fields>}, <No data fields>}, ptr = 0x0}, 
  cmdline = {<AString<char,Upp::String>> = {<Moveable<Upp::String,Upp::EmptyClass>> = {<EmptyClass> = {<No data fields>}, <No data fields>}, 
      ptr = 0x889a33c "/usr/bin/c++ -c  -I\"/home/p/upp/uvs/upp-uvs\" -I\"/usr/X11R6/include\" -I\"/usr/include\" -I\"/usr/X11R6/include/freetype2\" -I\"/opt/upp/uppsrc\" -DflagGUI -DflagGCC -DflagSHARED -DflagDEBUG_FULL -DflagLINUX "...}, <No data fields>}, 
  output = {<AString<char,Upp::String>> = {<Moveable<Upp::String,Upp::EmptyClass>> = {<EmptyClass> = {<No data fields>}, <No data fields>}, 
      ptr = 0x853974c ""}, <No data fields>}, 
  key = {<AString<char,Upp::String>> = {<Moveable<Upp::String,Upp::EmptyClass>> = {<EmptyClass> = {<No data fields>}, <No data fields>}, 
      ptr = 0x94e3404 "/opt/upp/out/Core/GCC.Debug_full.Gui.Release.Shared/Win32Com.o"}, <No data fields>}, 
  group = {<AString<char,Upp::String>> = {<Moveable<Upp::String,Upp::EmptyClass>> = {<EmptyClass> = {<No data fields>}, <No data fields>}, 
      ptr = 0x94a7e44 "Core"}, <No data fields>}, outfile = 0x0, 
  quiet = false, exitcode = 0, last_msecs = 948604485}
(gdb) p processes[1]
$6 = (Slot &) @0x886d490: {
  process = {<MoveableAndDeepCopyOption<Upp::One<Upp::SlaveProcess>,Upp::EmptyClass>> = {<Moveable<Upp::One<Upp::SlaveProcess>,Upp::DeepCopyOption<Upp::One<Upp::SlaveProcess>, Upp::EmptyClass> >> = {<DeepCopyOption<Upp::One<Upp::SlaveProcess>,Upp::EmptyClass>> = {<EmptyClass> = {<No data fields>}, <No data fields>}, <No data fields>}, <No data fields>}, ptr = 0x94c5e80}, 
  cmdline = {<AString<char,Upp::String>> = {<Moveable<Upp::String,Upp::EmptyClass>> = {<EmptyClass> = {<No data fields>}, <No data fields>}, 
      ptr = 0x94e937c "/usr/bin/c++ -c  -I\"/home/p/upp/uvs/upp-uvs\" -I\"/usr/X11R6/include\" -I\"/usr/include\" -I\"/usr/X11R6/include/freetype2\" -I\"/opt/upp/uppsrc\" -DflagGUI -DflagGCC -DflagSHARED -DflagDEBUG_FULL -DflagLINUX "...}, <No data fields>}, 
  output = {<AString<char,Upp::String>> = {<Moveable<Upp::String,Upp::EmptyClass>> = {<EmptyClass> = {<No data fields>}, <No data fields>}, 
      ptr = 0x853974c ""}, <No data fields>}, 
  key = {<AString<char,Upp::String>> = {<Moveable<Upp::String,Upp::EmptyClass>> = {<EmptyClass> = {<No data fields>}, <No data fields>}, 
      ptr = 0x94d89cc "/opt/upp/out/Core/GCC.Debug_full.Gui.Release.Shared/OL_Set.o"}, <No data fields>}, 
  group = {<AString<char,Upp::String>> = {<Moveable<Upp::String,Upp::EmptyClass>> = {<EmptyClass> = {<No data fields>}, <No data fields>}, 
      ptr = 0x94a7e44 "Core"}, <No data fields>}, outfile = 0x0, 
  quiet = false, exitcode = 0, last_msecs = 955095921}
(gdb) q
The program is running.  Quit anyway (and detach it)? (y or n) Detaching from program: /home/p/upp/out/gcc.Debug_full.Gui.Shared/ide, process 362


I fixed this bad behaviour by forcing IsRunning() to return
true only when waitpid didn't return -1, and while I already
where altering the code I also inserted some logging of the
errno. then I tried again, and no locking. still, this is not
a bug-fix, since the process still didn't pass its return-
code. maybe someone might actually find the real bug. I
logged the ide's stdout, here's the output (as above, I
inserted "..." for brevity):

...
LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]
LocalSlaveProcess::Open(/usr/bin/c++ -c ... -o "/opt/upp/out/Core/GCC.Gui.Shared/Mt.o")
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]

LocalSlaveProcess::Open
rpipe[7, 14]
wpipe[15, 16]
	fork, pid = 698, getpid = 294
parent process - continue
LocalSlaveProcess::Open(/usr/bin/c++ -c  ... -o "/opt/upp/out/Core/GCC.Gui.Shared/Thread.o")
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]

LocalSlaveProcess::Open
rpipe[17, 18]
wpipe[19, 20]
	fork, pid = 700, getpid = 294
parent process - continue
IsRunning() -> no, just exited, exit code = 0
IsRunning() -> no
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[7, 14]
wpipe[15, 16]
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]
IsRunning() -> no, just exited, errno = 10
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[17, 18]
wpipe[19, 20]
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]
LocalSlaveProcess::Open(/usr/bin/c++ -c  ... -o "/opt/upp/out/Core/GCC.Gui.Shared/OL_Set.o")
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]

LocalSlaveProcess::Open
rpipe[7, 14]
wpipe[15, 16]
	fork, pid = 704, getpid = 294
parent process - continue
IsRunning() -> no, just exited, exit code = 0
IsRunning() -> no
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[7, 14]
wpipe[15, 16]
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]
LocalSlaveProcess::Open(/usr/bin/c++ -c ... -o "/opt/upp/out/Core/GCC.Gui.Shared/heap.o")
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]

LocalSlaveProcess::Open
rpipe[7, 14]
wpipe[15, 16]
	fork, pid = 707, getpid = 294
parent process - continue
LocalSlaveProcess::Open(/usr/bin/c++ -c ... -o "/opt/upp/out/Core/GCC.Gui.Shared/heapdbg.o")
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]

LocalSlaveProcess::Open
rpipe[17, 18]
wpipe[19, 20]
	fork, pid = 709, getpid = 294
parent process - continue
Read() -> select
Read(), read -> 1024: rpipe[7, 14]
wpipe[15, 16]
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]
LocalSlaveProcess::Open(/usr/bin/c++ -c ... -o "/opt/upp/out/Core/GCC.Gui.Shared/Mt.o")
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]

LocalSlaveProcess::Open
rpipe[7, 14]
wpipe[15, 16]
	fork, pid = 698, getpid = 294
parent process - continue
LocalSlaveProcess::Open(/usr/bin/c++ -c ... -fexceptions 
Read() -> select
Read(), read -> 1024:  -Os -finline-limit=20 -x c++ "/home/p/upp/uvs/upp-uvs/Core/Thread.cpp" -o "/opt/upp/out/Core/GCC.Gui.Shared/Thread.o")
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]

LocalSlaveProcess::Open
rpipe[17, 18]
wpipe[19, 20]
	fork, pid = 700, getpid = 294
parent process - continue
IsRunning() -> no, just exited, exit code = 0
IsRunning() -> no
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[7, 14]
wpipe[15, 16]
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]
IsRunning() -> no, just exited, errno = 10
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[17, 18]
wpipe[19, 20]
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]
LocalSlaveProcess::Open(/usr/bin/c++ -c  -I"/home/p/upp/uvs/upp-uvs" ...
...
LocalSlaveProcess::Open(/usr/bin/c++ -c ... -o "/opt/upp/out/Draw/GCC.Gui.Shared/DrawTextXft.o")
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]

LocalSlaveProcess::Open
rpipe[17, 18]
wpipe[19, 20]
	fork, pid = 
Read() -> select
Read(), read -> 1024: 974, getpid = 294
parent process - continue
IsRunning() -> no, just exited, exit code = 0
IsRunning() -> no
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[7, 14]
wpipe[15, 16]
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]
LocalSlaveProcess::Open(/usr/bin/c++ -c ... -o "/opt/upp/out/Draw/GCC.Gui.Shared/Draw.o")
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]

LocalSlaveProcess::Open
rpipe[7, 14]
wpipe[15, 16]
	fork, pid = 0, getpid = 977
child process - execute application
26arguments:
[0]: </usr/bin/c++>
[1]: <-c>
[2]: <-I/home/p/upp/uvs/upp-uvs>
[3]: <-I/usr/X11R6/include>
[
IsRunning() -> no, just exited, exit code = 0
IsRunning() -> no
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[7, 14]
wpipe[15, 16]
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]
IsRunning() -> no, just exited, errno = 10
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[17, 18]
wpipe[19, 20]
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]
LocalSlaveProcess::Open(/usr/bin/c++ -c ... -o "/opt/upp/out/Draw/GCC.Gui.Shared/DrawOpWin32.o")
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]

LocalSlaveProcess::Open
rpipe[7, 14]
wpipe[15, 16]
	fork, pid = 981, getpid = 294
parent process - continue
LocalSlaveProcess::Open(/usr/bin/c++ -c ... -o "/opt/upp/out/Draw/GCC.Gui.Shared/DrawOpX11.o")
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]

LocalSlaveProcess::Open
rpipe[17, 18]
wpipe[19, 20]
	fork, pid = 983, getpid = 294
parent process - continue
IsRunning() -> no, just exited, exit code = 0
IsRunning() -> no
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[7, 14]
wpipe[15, 16]
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]
LocalSlaveProcess::Open(/usr/bin/c++ -c ... -o "/opt/upp/out/Draw/GCC.Gui.Shared/DrawData.o")
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]

LocalSlaveProcess::Open
rpipe[7, 14]
wpipe[15, 16]
	fork, pid = 986, getpid = 294
parent process - continue
IsRunning() -> no, just exited, exit code = 0
IsRunning() -> no
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[17, 18]
wpipe[19, 20]
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]
LocalSlaveProcess::Open(/usr/bin/c++ -c ... -o "/opt/upp/out/Draw/GCC.Gui.Shared/Drawing.o")
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]

LocalSlaveProcess::Open
rpipe[17, 18]
wpipe[19, 20]
	fork, pid = 989, getpid = 294
parent process - continue
Read() -> select
Read(), read -> 1024: upp/uvs/upp-uvs>
[3]: <-I/usr/X11R6/include>
[
IsRunning() -> no, just exited, exit code = 0
IsRunning() -> no
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[7, 14]
wpipe[15, 16]
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]
IsRunning() -> no, just exited, errno = 10
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[17, 18]
wpipe[19, 20]
IsRunning() -> no
IsRunning() -> no

LocalSlaveProcess::Free, pid = 294
rpipe[-1, -1]
wpipe[-1, -1]
LocalSlaveProcess::Open(/usr/bin/c++ -c  -I"/home/p/upp/uvs/upp-uvs" ...

[Updated on: Mon, 29 January 2007 11:22]

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