[Bug gprof/21968] New: gprog taking huge time

[sdasgup3 at illinois dot edu]

https://sourceware.org/bugzilla/show_bug.cgi?id=21968

            Bug ID: 21968
           Summary: gprog taking huge  time
           Product: binutils
           Version: 2.28
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gprof
          Assignee: unassigned at sourceware dot org
          Reporter: sdasgup3 at illinois dot edu
  Target Milestone: ---

Hello Team,
I am trying to profile LLVM's tool clang (trunk version) using gprof. Here are
the steps that I followed:
1. Build clang with '-no-pie -g -pg' (-no-pie is used because I am using GCC
6.0 which has default binary generated as pie) 
2. ~/Install/llvm.debug.install/bin/clang++ hello.cpp
  - The size of the gmon.out is 40,149,695 Bytes
3. gprof  -Q -b  ~/Install/llvm.debug.install/bin/clang++

and it waits for 2+hrs.

My GCC version used for building clang is: 6.3.0.

Can anybody please let me know if this is expected behavior or is there some
way I can get more insight ?

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