https://bugs.kde.org/show_bug.cgi?id=386923
Bug ID: 386923
Summary: heaptrack stalls forever in LineReader::getLine
Product: Heaptrack
Version: unspecified
Platform: Debian unstable
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: general
Assignee: m...@milianw.de
Reporter: giuseppe.bilo...@gmail.com
Target Milestone: ---
I tried running clinfo under heaptrack, and noticed that it stalls forever.
A backtrace on a stalled case gives:
#0 0x00007faa3bbf76c0 in __read_nocancel () at
../sysdeps/unix/syscall-template.S:84
#1 0x00007faa3c4855b7 in std::__basic_file<char>::xsgetn(char*, long) () from
/usr/lib/x86_64-linux-gnu/libstdc++.so.6
#2 0x00007faa3c4bed50 in std::basic_filebuf<char, std::char_traits<char>
>::underflow() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#3 0x00007faa3c47d049 in std::basic_istream<char, std::char_traits<char> >&
std::getline<char, std::char_traits<char>, std::allocator<char>
>(std::basic_istream<char, std::char_traits<char> >&,
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>
>&, char) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#4 0x000055aa3a1be937 in std::getline<char, std::char_traits<char>,
std::allocator<char> > (__str="R 5017", __is=...) at
/usr/include/c++/6/bits/basic_string.h:5382
#5 LineReader::getLine (in=..., this=0x7ffe0e404470) at
./src/util/linereader.h:45
#6 main () at ./src/interpret/heaptrack_interpret.cpp:360
With some experimenting, it seems that this happens if (and only if?) the Mesa
OpenCL ICD is available. Possible steps to reproduce, on Debian unstable:
* apt-get install ocl-icd-libopencl1 mesa-opencl-icd clinfo
* run heaptrack clinfo
This can be done also in a virtual machine, since it's not necessary for the
Mesa OpenCL ICD to actually expose any OpenCL devices (on my machine it has 0
devices, for example).
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