[DynInst_API:] MAX_THREADS hardcoded limit

["Bilimale, Husha" <Husha.Bilimale@xxxxxxxxxxxx>]

Hello,

 I was trying to attach to a process that has 96 threads and another process that has 126 threads. Working on a Suse x86-64 system with Dyninst 8.0

 

The Bpatch attach fails with the following logs.

 

[UI]dynProcess.C[1449]: value of tid in slot 0x7fff49f557b8 is 0x3d

[UI]dynProcess.C[1468]: Failed to find empty tid slot

[UI]dynProcess.C[525]: bootstrap failed while registering threads with RT library

Failed to bootstrap process 29726: terminating...

[UI]dynProcess.C[1151]: Terminating process 29726

[../src/procset.C:1513-U] - ProcessSet::terminate entry

[../src/procset.C:1522-U] - Clearing queue pre-force-terminate

 

The MAX_THREADS has a limit of 32 and THREAD_HASH_SIZE=40 hardcoded. Can these values be made configurable or the limit increased ?

 

I changed the hardcoded limit and made it work for the processes that I am trying to instrument.

 

Thanks

Husha Bilimale

Teradata, San Diego