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Test Your Knowledge in Computers #503
Difficulty: Easy
The flow of control (or simply control flow) is how a program processes its instructions.
True or False?
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pstack(1) [centos man page]

GSTACK(1)						     Linux Programmer's Manual							 GSTACK(1)

NAME
gstack - print a stack trace of a running process SYNOPSIS
gstack pid DESCRIPTION
gstack attaches to the active process named by the pid on the command line, and prints out an execution stack trace. If ELF symbols exist in the binary (usually the case unless you have run strip(1)), then symbolic addresses are printed as well. If the process is part of a thread group, then gstack will print out a stack trace for each of the threads in the group. SEE ALSO
nm(1), ptrace(2), gdb(1) AUTHORS
Ross Thompson <ross@whatsis.com> Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla> Red Hat Linux Feb 15 2008 GSTACK(1)

Check Out this Related Man Page

PSTACK(1)						     Linux Programmer's Manual							 PSTACK(1)

NAME
pstack - print a stack trace of running processes SYNOPSIS
pstack pid [...] DESCRIPTION
pstack attaches to the active processes named by the pids on the command line, and prints out an execution stack trace, including a hint at what the function arguments are. If symbols exist in the binary (usually the case unless you have run strip(1)), then symbolic addresses are printed as well. If the process is part of a thread group, then pstack will print out a stack trace for each of the threads in the group. RESTRICTIONS
pstack currently works only on Linux, only on an x86 machine running 32 bit ELF binaries (64 bit not supported). Also, for symbolic infor- mation, you need to use a GNU compiler to generate your program, and you can't strip symbols from the binaries. For thread information to be dumped, you have to use the debug-aware version of the LinuxThreads libpthread.so library. (To check, run nm(1) on your pthreads library, and make sure that the symbol "__pthread_threads_debug" is defined.) Threads are not supported with the newer NPTL libpthread.so library. SEE ALSO
nm(1), ptrace(2) AUTHORS
Ross Thompson <ross@whatsis.com> Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla> Red Hat Linux Feb 25 2002 PSTACK(1)

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