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pszilard
Adept I
‎02-16-2016 09:52 AM

sprofile segfault

The CodeXL 1.9 shipped sprofile segfaults while generating profile data at the end of each run. It looks like I do get a (possibly truncated) csv and a certainly truncated atp file.

Command line:

sprofile --apitrace --tracesummary --occupancy --perfcounter -w $PWD -o prof $PATH_TO_BINARY

Backtrace:

Program received signal SIGSEGV, Segmentation fault.

0x0000000000524a57 in std::__detail::_List_node_base::_M_unhook() ()

(gdb) bt

#0  0x0000000000524a57 in std::__detail::_List_node_base::_M_unhook() ()

#1  0x000000000047e888 in CLAtpFilePart::MergeTimestamp(std::string

const&, std::map<std::string, std::list<GPUTimestamp,

std::allocator<GPUTimestamp> >, std::less<std::string>,

std::allocator<std::pair<std::string const, std::list<GPUTimestamp,

std::allocator<GPUTimestamp> > > > >&, std::vector<CLAPIInfo*,

std::allocator<CLAPIInfo*> >&) ()

#2  0x0000000000480097 in

CLAtpFilePart::UpdateTmpTimestampFiles(std::string const&, std::string

const&) ()

#3  0x0000000000480ae6 in

CLAtpFilePart::WriteContentSection(std::basic_ofstream<char,

std::char_traits<char> >&, std::string const&, std::string const&) ()

#4  0x0000000000497061 in AtpFileWriter::SaveToAtpFile() ()

#5  0x0000000000416b7a in MergeTraceFile(int) [clone .isra.160] ()

#6  0x0000000000417359 in MergeFragFiles(int) ()

#7  0x000000000041a99f in main ()

Is there are better place (e.g. a proper bug-tracker) to report bugs?

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4 Replies
chesik
Staff
Staff
‎02-17-2016 03:03 PM

Do you see this with any application (like perhaps one of the APP SDK samples) or is it specific to your particular application?

Does this only happen when you include both --apitrace and --perfcounter on the sprofile command line?  If you omit one, of those switches does it make a difference?

Chris

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pszilard
In response to chesik
Adept I
‎02-17-2016 04:48 PM

> Do you see this with any application (like perhaps one of the APP SDK samples) or is it specific to your particular application?

Not sure because I started to get a strange error:

sprofile --perfcounter -w /nethome/pszilard/tools/amd-appsdk_2.9_samples/opencl/cl/BufferBandwidth/bin/x86_64/Release -o prof /nethome/pszilard/tools/amd-appsdk_2.9_samples/opencl/cl/BufferBandwidth/bin/x86_64/Release/BufferBandwidth

AMD CodeXL GPU Profiler V3.1.10132 is Enabled

*** Error in `/nethome/pszilard/tools/amd-appsdk_2.9_samples/opencl/cl/BufferBandwidth/bin/x86_64/Release/BufferBandwidth': free(): invalid pointer: 0x00007fe83fe777b8 ***

> Does this only happen when you include both --apitrace and --perfcounter on the sprofile command line?  If you omit one, of those switches does it make a difference?

I think so, I was able to profile with only "--occupancy --perfcounter" earlier today.

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pszilard
In response to pszilard
Adept I
‎02-18-2016 03:42 PM

Actually, it looks like no matter what program I try to profile and what sprofile command line argument combination I use, if I pass "-p/--perfcounter" I now always get the above mentioned error, e.g with the PrefixSum SDK example:

$ sprofile -p ./PrefixSum

AMD CodeXL GPU Profiler V3.1.10132 is Enabled

*** Error in `/nethome/pszilard/tools/amd-appsdk_2.9_samples/opencl/cl/PrefixSum/bin/x86_64/Release/./PrefixSum': free(): invalid pointer: 0x00007f4cae8cf7b8 ***

Failed to generate profile result /nethome/pszilard/Session1.csv.

The pointers it complains about seem to be quite close to each other, e.g. with another application I got 0x00007fb407f487b8.

This is really weird as I have been able to generate profile data on the same machine, same driver, same hardware about a week ago.

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pszilard
In response to pszilard
Adept I
‎02-22-2016 02:19 PM

I figured this out and it is not pretty. Connecting to the remote headless Linux server (Ubuntu 14.04, no X running) without X forwarding, causes sprofile to always crash with -p, but when connecting with X forwarding, it seems to run fine.

Such bugs are preventable and should be prevented by beta testing IMO and it is very concerning that they are not. Is there a beta program for CodeXL?

Here's the backtrace, just in case...

(gdb) r

Starting program: /tmp/PrefixSum

[Thread debugging using libthread_db enabled]

Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

AMD CodeXL GPU Profiler V3.1.10132 is Enabled

*** Error in `/tmp/PrefixSum': free(): invalid pointer: 0x00007ffff73ac7b8 ***

Program received signal SIGABRT, Aborted.

0x00007ffff7024cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56

56 ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.

(gdb) bt

#0  0x00007ffff7024cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56

#1  0x00007ffff70280d8 in __GI_abort () at abort.c:89

#2  0x00007ffff7061394 in __libc_message (do_abort=do_abort@entry=1, fmt=fmt@entry=0x7ffff716fb28 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175

#3  0x00007ffff706d66e in malloc_printerr (ptr=<optimized out>, str=0x7ffff716bc19 "free(): invalid pointer", action=1) at malloc.c:4996

#4  _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at malloc.c:3840

#5  0x00007ffff7e3880d in ?? () from /usr/lib/libatiadlxx.so

#6  0x00007ffff7e48605 in ADL2_Main_Control_Destroy () from /usr/lib/libatiadlxx.so

#7  0x00007fffedefe1c7 in AMDTADLUtils::Unload() () from /opt/tcbsys/amd/codexl/1.9.10132/x86_64/libCLProfileAgent.so

#8  0x00007fffedefe568 in AMDTADLUtils::LoadAndInit() () from /opt/tcbsys/amd/codexl/1.9.10132/x86_64/libCLProfileAgent.so

#9  0x00007fffedefd4d7 in AMDTADLUtils::GetAsicInfoList(std::vector<ADLUtil_ASICInfo, std::allocator<ADLUtil_ASICInfo> >&) () from /opt/tcbsys/amd/codexl/1.9.10132/x86_64/libCLProfileAgent.so

#10 0x00007fffedeabce5 in CLGPAProfiler::Init(Parameters const&, std::string&) () from /opt/tcbsys/amd/codexl/1.9.10132/x86_64/libCLProfileAgent.so

#11 0x00007fffedea1ef7 in InitProfiler() () from /opt/tcbsys/amd/codexl/1.9.10132/x86_64/libCLProfileAgent.so

#12 0x00007fffedea1455 in clAgent_OnLoad () from /opt/tcbsys/amd/codexl/1.9.10132/x86_64/libCLProfileAgent.so

#13 0x00007ffff32c819d in ?? () from /usr/lib/libamdocl64.so

#14 0x00007ffff32c8f77 in ?? () from /usr/lib/libamdocl64.so

#15 0x00007ffff32d8305 in ?? () from /usr/lib/libamdocl64.so

#16 0x00007ffff32a8e53 in clIcdGetPlatformIDsKHR () from /usr/lib/libamdocl64.so

#17 0x00007ffff7bd55b2 in ?? () from /opt/tcbsys/amd/appsdk/2.9/lib/x86_64/libOpenCL.so.1

#18 0x00007ffff7bd7986 in ?? () from /opt/tcbsys/amd/appsdk/2.9/lib/x86_64/libOpenCL.so.1

#19 0x00007ffff6ddda90 in pthread_once () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_once.S:103

#20 0x00007ffff7bd7747 in ?? () from /opt/tcbsys/amd/appsdk/2.9/lib/x86_64/libOpenCL.so.1

#21 0x00007ffff7bd57a5 in ?? () from /opt/tcbsys/amd/appsdk/2.9/lib/x86_64/libOpenCL.so.1

#22 0x00007ffff7bd6f20 in clGetPlatformIDs () from /opt/tcbsys/amd/appsdk/2.9/lib/x86_64/libOpenCL.so.1

#23 0x0000000000412622 in appsdk::CLCommandArgs::validatePlatformAndDeviceOptions (this=0x622010) at /opt/tcbsys/amd/appsdk/2.9/include/SDKUtil/CLUtil.hpp:1121

#24 0x000000000041235e in appsdk::CLCommandArgs::parseCommandLine (this=0x622010, argc=1, argv=0x7fffffffe4a8) at /opt/tcbsys/amd/appsdk/2.9/include/SDKUtil/CLUtil.hpp:1103

#25 0x000000000040f059 in main (argc=1, argv=0x7fffffffe4a8) at /nethome/pszilard/tools/amd-appsdk_2.9_samples/opencl/cl/PrefixSum/PrefixSum.cpp:621

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