HeapTrack Query - Stripped Binary

[sindhu krishnan]

Thank you!

I have updated libunwind to version 1.6.2 and heaptrack to version 1.4.0.

Initially, I believed that there might be an issue with unwinding the
backtrace due to using a stripped binary.
However, I just did LD_PRELOAD of libheaptrack_preload.so to my program.

1) I am still experiencing a crash in libunwind.
(gdb) bt
#0  _ULarm_step (cursor=cursor at entry=0xbe964488) at
../../libunwind-1.6.2/src/arm/Gstep.c:173
#1  0xb6d1b04c in slow_backtrace (uc=0xbe960448, size=64,
buffer=0xbe9684b8) at ../../libunwind-1.6.2/src/mi/backtrace.c:45
#2  unw_backtrace (buffer=buffer at entry=0xbe9684b8, size=size at entry=64)
at ../../libunwind-1.6.2/src/mi/backtrace.c:72
#3  0xb6fa4af0 in Trace::unwind (data=data at entry=0xbe9684b8) at
/usr/src/debug/heaptrack/1.4.0-r0/git/src/track/trace_libunwind.cpp:64
#4  0xb6fa43c4 in Trace::fill (skip=2, this=0xbe9684b0) at
/usr/src/debug/heaptrack/1.4.0-r0/git/src/track/trace.h:44
#5  heaptrack_malloc (ptr=ptr at entry=0x43f258, size=4936) at
/usr/src/debug/heaptrack/1.4.0-r0/git/src/track/libheaptrack.cpp:845
#6  0xb6fa1ada in malloc (size=<optimized out>) at
/usr/src/debug/heaptrack/1.4.0-r0/git/src/track/heaptrack_preload.cpp:214
#7  0xb6153792 in BKNI_Malloc_tagged () from /usr/lib/libnexus.so
#8  0xb6d070a4 in bipc_client_create () from /usr/lib/libnxclient.so
#9  0xb6d04a84 in ?? () from /usr/lib/libnxclient.so
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

2) In certain cases, it is not possible to preload
libheaptrack_preload.so to the program. Although the library is
present in the specified path and has the necessary permissions.

Starting program: /usr/bin/env
LD_PRELOAD=/usr/lib/heaptrack/libheaptrack_preload.so
/usr/bin/audiocap
process 22570 is executing new program: /usr/bin/audiocap
ERROR: ld.so: object '/usr/lib/heaptrack/libheaptrack_preload.so' from
LD_PRELOAD cannot be preloaded (cannot open shared object file):
ignored.

Any suggestions or assistance would really help.

Thank you

On Thu, Jun 15, 2023 at 12:50 PM Milian Wolff <mail at milianw.de> wrote:
>
> On Mittwoch, 14. Juni 2023 22:49:18 CEST sindhu krishnan wrote:
> > Thank you For the inputs!
> >
> > I'm using heaptrack version 1.2.0 and libunwind 1.3.1. I will try with
> > libunwind version 1.6.2.
> >
> > Is there any way to provide debug symbols separately when using a stripped
> > binary?
>
> Yes, with `heaptrack --record-only` followed by a manual invocation of
> `heaptrack_interpret` (see heaptrack bash file for examples). Note that we
> don't yet have good support to add custom sysroot or library search paths
> though - patches welcome.
>
> <snip>
>
> > How do I execute heaptrack for a running process? Do I only need to attach
> > the process to heaptrack, or can I modify the service file to start the
> > process directly with heaptrack?
>
> That's up to you, pick whatever you want/need.
>
> Cheers
> --
> Milian Wolff
> mail at milianw.de
> http://milianw.de