Dear Rick,
many thanks for your explanation. If I'm understanding correctly I have to
figure out how I have to get the configuration for the semaphores to work
correctly? Does this also include to change the bit of recursion you talked
about to a non recursive version?
Because I read somewhere that recursion works not too well in such cases.
@striketrough text: I guess with the last information this isn't useful anymore.
Yesterday, I did not provide gdb logs of the complete Debug-Build. It was only
for the rexximage executable. With a small sample helloWorld rexx program there
is an interesting difference when trying to execute it.
There is a segmentation fault. It occurs in RexxMemory.cpp line 691.
I attached the 2 GDB-Logfiles.
Thomas
On 7/4/21 9:37 PM, Rick McGuire wrote:
When porting to new *ix environments, it is quite common for there to be
problems getting the configuration for the semaphores to work correctly. From
the stack trace, it is hanging on a request for a mutex semaphore. rexximage
should run completely single threaded, so this should never deadlock. However,
the semaphore in question is already held by the current thread because of a
bit of recursion at startup, so It looks like the semaphores are not properly
handling nested requests.
Rick
On Sun, Jul 4, 2021 at 3:11 PM Thomas Kahr
<[email protected]<mailto:[email protected]>> wrote:
Dear Developers,
the current semester has come to an end and I finished all my exams. So, now I
can fully focus on my little Android Project.
There are some new developments I would like to share with all of you. I'm not
experienced with GDB and STRACE so maybe here are some pros who know what to do
with the output better than me.
1. GDB
As Erich suggested I built a Debug-Version for Android and setup gdbserver on
the device and connected it with GDB on my host System. The output files (I
followed the steps in the Sourceforge ooRexx Website) are attached.
I did not push the whole debug version to the device. I just moved all
necessary files to create rexx.img to the device. When executing rexximage its
also hanging up so I thought it would be a good idea to debug rexximage first
because maybe its more compact. These are the following files:
/bin:
rexximage
rxapi
CoreClasses.orx
PlatformObjects.orx
StreamClasses.orx
/lib:
librexx.so
librexxapi.so
librxregexp.so
librxunixsys.so
(I think not every single lib file is necessary for building the target
rexx.img but I pushed every lib file which was already built when executing
rexximage during the build process)
I also attached 2 Screenshots showing the GDB output on the Host and the
Target. As you can see, on the target I get the "Acitivity output" which Erich
told me I should include. In theory I should also get the same output for the
other 2 .orx Files. Seems like something is wrong here.
2. STrace
Strace is also available on the emulated Android device. I logged the strace
output from "rexx -v" and "rexx bintest.rex" where this .rex-File is just a
HelloWorld.
I also tried it with rexximage rexx.img.
rexx -v is working
rexx bintest.rex is hanging up even with the debug version.
rexximage rexx.img hangs up
The 3 files are attached.
Any suggestions for my next steps. Is the output helpful?
Thanks for your help and best regards
Thomas
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Id Target Id Frame
* 1 Thread 4976.4976 "rexx" 0xf7a11970 in MemoryObject::restoreImage (this=0xf7afac2c <memoryObject>)
at /home/tjk/coding/oorexx/oorexxsvn/main/trunk/interpreter/memory/RexxMemory.cpp:691
Thread 1 (Thread 4976.4976 "rexx"):
#0 0xf7a11970 in MemoryObject::restoreImage (this=0xf7afac2c <memoryObject>) at /home/tjk/coding/oorexx/oorexxsvn/main/trunk/interpreter/memory/RexxMemory.cpp:691
#1 0xf7a1171f in MemoryObject::initialize (this=0xf7afac2c <memoryObject>, restoringImage=true, imageTarget=0x0) at /home/tjk/coding/oorexx/oorexxsvn/main/trunk/interpreter/memory/RexxMemory.cpp:179
#2 0xf7aa9b55 in Interpreter::startInterpreter (mode=Interpreter::RUN_MODE, imageTarget=0x0) at /home/tjk/coding/oorexx/oorexxsvn/main/trunk/interpreter/runtime/Interpreter.cpp:155
#3 0xf7aaa1cd in Interpreter::createInterpreterInstance (options=0x0) at /home/tjk/coding/oorexx/oorexxsvn/main/trunk/interpreter/runtime/Interpreter.cpp:325
#4 0xf7aaa078 in Interpreter::createInstance (instance=@0xffffb400: 0x6f72705f, threadContext=@0xffffb3fc: 0x64666f72, options=0x0) at /home/tjk/coding/oorexx/oorexxsvn/main/trunk/interpreter/runtime/Interpreter.cpp:283
#5 0xf79ab006 in RexxCreateInterpreter (instance=0xffffb400, context=0xffffb3fc, options=0x0) at /home/tjk/coding/oorexx/oorexxsvn/main/trunk/interpreter/api/InterpreterAPI.cpp:395
#6 0x56556e22 in main (argc=2, argv=0xffffd4c4) at /home/tjk/coding/oorexx/oorexxsvn/main/trunk/utilities/rexx/platform/unix/rexx.cpp:136
Thread 1 (Thread 4976.4976 "rexx"):
#0 0xf7a11970 in MemoryObject::restoreImage (this=0xf7afac2c <memoryObject>) at /home/tjk/coding/oorexx/oorexxsvn/main/trunk/interpreter/memory/RexxMemory.cpp:691
primitiveTypeNum = 4155416004
imageSize = 2063764
relocation = 0xf714603c "\204\254\257", <incomplete sequence \367>
markHandler = {<MarkHandler> = {_vptr$MarkHandler = 0xf7ae4c80 <vtable for ImageRestoreMarkHandler+8>}, relocation = 0xf714603c "\204\254\257", <incomplete sequence \367>}
objectPointer = 0xf7146040
endPointer = 0xf733ddd4
saveArray = 0xf7146040
primitiveBehaviours = 0xf7aebee0
#1 0xf7a1171f in MemoryObject::initialize (this=0xf7afac2c <memoryObject>, restoringImage=true, imageTarget=0x0) at /home/tjk/coding/oorexx/oorexxsvn/main/trunk/interpreter/memory/RexxMemory.cpp:179
No locals.
#2 0xf7aa9b55 in Interpreter::startInterpreter (mode=Interpreter::RUN_MODE, imageTarget=0x0) at /home/tjk/coding/oorexx/oorexxsvn/main/trunk/interpreter/runtime/Interpreter.cpp:155
lock = {terminated = false}
#3 0xf7aaa1cd in Interpreter::createInterpreterInstance (options=0x0) at /home/tjk/coding/oorexx/oorexxsvn/main/trunk/interpreter/runtime/Interpreter.cpp:325
lock = {terminated = false}
rootActivity = 0x0
instance = 0x3
#4 0xf7aaa078 in Interpreter::createInstance (instance=@0xffffb400: 0x6f72705f, threadContext=@0xffffb3fc: 0x64666f72, options=0x0) at /home/tjk/coding/oorexx/oorexxsvn/main/trunk/interpreter/runtime/Interpreter.cpp:283
newInstance = 0xf7ebcb90 <__kernel_vsyscall>
activity = 0x0
#5 0xf79ab006 in RexxCreateInterpreter (instance=0xffffb400, context=0xffffb3fc, options=0x0) at /home/tjk/coding/oorexx/oorexxsvn/main/trunk/interpreter/api/InterpreterAPI.cpp:395
No locals.
#6 0x56556e22 in main (argc=2, argv=0xffffd4c4) at /home/tjk/coding/oorexx/oorexxsvn/main/trunk/utilities/rexx/platform/unix/rexx.cpp:136
i = 2
rc = 0
program_name = 0xffffd614 "hello.rex"
arg_buffer = '\000' <repeats 652 times>...
cp = 0xffffd614 "hello.rex"
argument = {strlength = 0, strptr = 0xffffb428 ""}
argCount = 0
ptr = 0xf7783245 <system_properties+37> "/dev/__properties__"
rexxrc = 0
from_string = false
real_argument = true
instore = {{strlength = 0, strptr = 0x0}, {strlength = 0, strptr = 0x0}}
pgmInst = 0x6f72705f
pgmThrdInst = 0x64666f72
rxargs = 0x400
rxcargs = 0xffffb3d8
dir = 0xf7704839 <ContextNode::Open(bool, bool*)+377>
result = 0xffffb7f8
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