binutils-gdb/gdb/testsuite/gdb.base/attach.exp

#   Copyright 1997, 1999, 2002 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

# Please email any bugs, comments, and/or additions to this file to:
# bug-gdb@prep.ai.mit.edu

if $tracelevel then {
	strace $tracelevel
	}

set prms_id 0
set bug_id 0

# On HP-UX 11.0, this test is causing a process running the program
# "attach" to be left around spinning.  Until we figure out why, I am
# commenting out the test to avoid polluting tiamat (our 11.0 nightly
# test machine) with these processes. RT
#
# Setting the magic bit in the target app should work.  I added a
# "kill", and also a test for the R3 register warning.  JB
if { [istarget "hppa*-*-hpux*"] } {
    return 0
}

# are we on a target board
if [is_remote target] then {
    return 0
}

set testfile "attach"
set srcfile  ${testfile}.c
set srcfile2 ${testfile}2.c
set binfile  ${objdir}/${subdir}/${testfile}
set binfile2 ${objdir}/${subdir}/${testfile}2
set cleanupfile ${objdir}/${subdir}/${testfile}.awk

#execute_anywhere "rm -f ${binfile} ${binfile2}"
remote_exec build "rm -f ${binfile} ${binfile2}"
# For debugging this test
#
#log_user 1

# Clean out any old files from past runs.
#
remote_exec build "${cleanupfile}"

# build the first test case
#
if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
     gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
}

# Because we can't attach over nfs, copy binfile to /tmp/${binfile}.${pid}
# and replace binfile with a symbolic link

  set pid [pid]
  exec /bin/cp -f ${binfile} /tmp/attach1.${pid}
  exec rm -f ${binfile}
  set binfile /tmp/attach1.${pid}
#  exec ln -s /tmp/attach1.${pid} ${binfile}

# Build the in-system-call test

if  { [gdb_compile "${srcdir}/${subdir}/${srcfile2}" "${binfile2}" executable {debug}] != "" } {
     gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
}

# Because we can't attach over nfs, copy binfile2 to /tmp/${binfile2}.${pid}
# and replace binfile2 with a symbolic link

  set pid [pid]
  exec cp -f ${binfile2} /tmp/attach2.${pid} 
  exec rm -f ${binfile2}
  set binfile2 /tmp/attach2.${pid}
#  exec ln -s /tmp/attach2.${pid} ${binfile2}


if [get_compiler_info ${binfile}] {
    return -1
}

proc do_attach_tests {} {
   global gdb_prompt
   global binfile
   global srcfile
   global testfile
   global objdir
   global subdir
   global timeout

   # Start the program running and then wait for a bit, to be sure
   # that it can be attached to.
   #
   set testpid [eval exec $binfile &]
   exec sleep 2

   # Verify that we cannot attach to nonsense.
   #
   send_gdb "attach abc\n"
   gdb_expect {
      -re ".*Illegal process-id: abc.*$gdb_prompt $"\
                      {pass "attach to nonsense is prohibited"}
      -re "Attaching to.*$gdb_prompt $"\
                      {fail "attach to nonsense is prohibited (bogus pid allowed)"}
      -re "$gdb_prompt $" {fail "attach to nonsense is prohibited"}
      timeout         {fail "(timeout) attach to nonsense is prohibited"}
   }

   # Verify that we cannot attach to what appears to be a valid
   # process ID, but is a process that doesn't exist.  (I don't
   # believe any process is ever assigned #0, at least on HPUX.)
   #
   send_gdb "attach 0\n"
   gdb_expect {
      # This reponse is expected on HP-UX 10.20 (i.e., ptrace-based).
      -re "Attaching to.*, process 0.*No such process.*$gdb_prompt $"\
                      {pass "attach to nonexistent process is prohibited"}
      # This response is expected on HP-UX 11.0 (i.e., ttrace-based).
      -re "Attaching to.*, process 0 failed.*Hint.*$gdb_prompt $"\
                      {pass "attach to nonexistent process is prohibited"}
      -re "Attaching to.*, process 0.*denied.*$gdb_prompt $"\
                      {pass "attach to nonexistent process is prohibited"}
      -re "$gdb_prompt $" {fail "attach to nonexistent process is prohibited"}
      timeout         {fail "(timeout) attach to nonexistent process is prohibited"}
   }

   # Verify that we can attach to the process by first giving its
   # executable name via the file command, and using attach with
   # the process ID.
   #
   # (Actually, the test system appears to do this automatically
   # for us.  So, we must also be prepared to be asked if we want
   # to discard an existing set of symbols.)
   #
   send_gdb "file $binfile\n"
   gdb_expect {
      -re "Load new symbol table from.*y or n.*$" {
         send_gdb "y\n"
         gdb_expect {
            -re "Reading symbols from $binfile\.\.\.*done.*$gdb_prompt $"\
                            {pass "(re)set file, before attach1"}
            -re "$gdb_prompt $" {fail "(re)set file, before attach1"}
            timeout         {fail "(timeout) (re)set file, before attach1"}
         }
      }
      -re "Reading symbols from $binfile\.\.\.*done.*$gdb_prompt $"\
                      {pass "set file, before attach1"}
      -re "$gdb_prompt $" {fail "set file, before attach1"}
      timeout         {fail "(timeout) set file, before attach1"}
   }

   send_gdb "attach $testpid\n"
   gdb_expect {
      -re "Attaching to program.*$binfile, process $testpid.*main.*at .*$srcfile:.*$gdb_prompt $"\
                      {pass "attach1, after setting file"}
      -re "$gdb_prompt $" {fail "attach1, after setting file"}
      timeout         {fail "(timeout) attach1, after setting file"}
   }

   # Verify that we can "see" the variable "should_exit" in the
   # program, and that it is zero.
   #
   send_gdb "print should_exit\n"
   gdb_expect {
      -re ".* = 0.*$gdb_prompt $"\
                      {pass "after attach1, print should_exit"}
      -re "$gdb_prompt $" {fail "after attach1, print should_exit"}
      timeout         {fail "(timeout) after attach1, print should_exit"}
   }

   # Detach the process.
   #
   send_gdb "detach\n"
   gdb_expect {
      -re "Detaching from program: .*$binfile.*$gdb_prompt $"\
                      {pass "attach1 detach"}
      -re "$gdb_prompt $" {fail "attach1 detach"}
      timeout         {fail "(timeout) attach1 detach"}
   }

   # Wait a bit for gdb to finish detaching
   #
   exec sleep 5

   # Purge the symbols from gdb's brain.  (We want to be certain
   # the next attach, which won't be preceded by a "file" command,
   # is really getting the executable file without our help.)
   #
   set old_timeout $timeout
   set timeout 15 
   send_gdb "file\n"
   gdb_expect {
      -re ".*gdb internal error.*$" { 
          fail "Internal error, prob. Memory corruption" 
      }
      -re "No executable file now.*Discard symbol table.*y or n.*$" {
         send_gdb "y\n"
         gdb_expect {
            -re "No symbol file now.*$gdb_prompt $"\
                            {pass "attach1, purging symbols after detach"}
            -re "$gdb_prompt $" {fail "attach1, purging symbols after detach"}
            timeout         {fail "(timeout) attach1, purging symbols after detach"}
         }
      }
      -re "$gdb_prompt $" {fail "attach1, purging file after detach"}
      timeout         {
          fail "(timeout) attach1, purging file after detach"
      }
   }
   set timeout $old_timeout

   # Verify that we can attach to the process just by giving the
   # process ID.
   #
   send_gdb "attach $testpid\n"
   gdb_expect {
      -re "Attaching to process $testpid.*Reading symbols from $binfile.*main.*at .*$gdb_prompt $"\
                      {pass "attach2"}
      -re "$gdb_prompt $" {fail "attach2"}
      timeout         {fail "(timeout) attach2"}
   }

   # Verify that we can modify the variable "should_exit" in the
   # program.
   #
   send_gdb "set should_exit=1\n"
   gdb_expect {
      -re "$gdb_prompt $" {pass "after attach2, set should_exit"}
      timeout         {fail "(timeout) after attach2, set should_exit"}
   }

   # Verify that the modification really happened.
   #
   send_gdb "tbreak 19\n"
   gdb_expect {
      -re "Breakpoint .*at.*$srcfile, line 19.*$gdb_prompt $"\
                      {pass "after attach2, set tbreak postloop"}
      -re "$gdb_prompt $" {fail "after attach2, set tbreak postloop"}
      timeout         {fail "(timeout) after attach2, set tbreak postloop"}
   }
   send_gdb "continue\n"
   gdb_expect {
      -re "main.*at.*$srcfile:19.*$gdb_prompt $"\
                      {pass "after attach2, reach tbreak postloop"}
      -re "$gdb_prompt $" {fail "after attach2, reach tbreak postloop"}
      timeout         {fail "(timeout) after attach2, reach tbreak postloop"}
   }

   # Allow the test process to exit, to cleanup after ourselves.
   #
   send_gdb "continue\n"
   gdb_expect {
      -re "Program exited normally.*$gdb_prompt $"\
                      {pass "after attach2, exit"}
      -re "$gdb_prompt $" {fail "after attach2, exit"}
      timeout         {fail "(timeout) after attach2, exit"}
   }

   # Make sure we don't leave a process around to confuse
   # the next test run (and prevent the compile by keeping
   # the text file busy), in case the "set should_exit" didn't
   # work.
   #
   remote_exec build "kill -9 ${testpid}"
   # Start the program running and then wait for a bit, to be sure
   # that it can be attached to.
   #
   set testpid [eval exec $binfile &]
   exec sleep 2

   # Verify that we can attach to the process, and find its a.out
   # when we're cd'd to some directory that doesn't contain the
   # a.out.  (We use the source path set by the "dir" command.)
   #
   send_gdb "dir ${objdir}/${subdir}\n"
   gdb_expect {
      -re ".*Source directories searched: .*$gdb_prompt $"\
                      {pass "set source path"}
      -re "$gdb_prompt $" {fail "set source path"}
      timeout         {fail "(timeout) set source path"}
   }

   send_gdb "cd /tmp\n"
   gdb_expect {
      -re ".*Working directory /tmp.*$gdb_prompt $"\
                      {pass "cd away from process' a.out"}
      -re "$gdb_prompt $" {fail "cd away from process' a.out"}
      timeout         {fail "(timeout) cd away from process' a.out"}
   }

   # Explicitly flush out any knowledge of the previous attachment.
   send_gdb "symbol\n"
   gdb_expect {
      -re ".*Discard symbol table from.*y or n. $"\
                      {send_gdb "y\n"
                       gdb_expect {
                          -re ".*No symbol file now.*$gdb_prompt $"\
                                          {pass "before attach3, flush symbols"}
                          -re "$gdb_prompt $" {fail "before attach3, flush symbols"}
                          timeout         {fail "(timeout) before attach3, flush symbols"}
                       }
                      }
      -re ".*No symbol file now.*$gdb_prompt $"\
                      {pass "before attach3, flush symbols"}
      -re "$gdb_prompt $" {fail "before attach3, flush symbols"}
      timeout         {fail "(timeout) before attach3, flush symbols"}
   }
   send_gdb "exec\n"
   gdb_expect {
      -re ".*No executable file now.*$gdb_prompt $"\
                      {pass "before attach3, flush exec"}
      -re "$gdb_prompt $" {fail "before attach3, flush exec"}
      timeout         {fail "(timeout) before attach3, flush exec"}
   }

   send_gdb "attach $testpid\n"
   gdb_expect {
      -re "Attaching to process $testpid.*Reading symbols from $binfile.*main.*at .*$gdb_prompt $"\
                      {pass "attach when process' a.out not in cwd"}
      -re "$gdb_prompt $" {fail "attach when process' a.out not in cwd"}
      timeout         {fail "(timeout) attach when process' a.out not in cwd"}
   }

   send_gdb "kill\n"
   gdb_expect {
      -re ".*Kill the program being debugged.*y or n. $"\
                      {send_gdb "y\n"
                       gdb_expect {
                          -re "$gdb_prompt $" {pass "after attach3, exit"}
                          timeout {fail "(timeout) after attach3, exit"}
                       }
                      }
      -re "$gdb_prompt $" {fail "after attach3, exit"}
      timeout         {fail "(timeout) after attach3, exit"}
   }
}

proc do_call_attach_tests {} {
   global gdb_prompt
   global binfile2

   # Start the program running and then wait for a bit, to be sure
   # that it can be attached to.
   #
   set testpid [eval exec $binfile2 &]
   exec sleep 2

   # Attach
   #
   gdb_test "file $binfile2" ".*" "force switch to gdb64, if necessary"
   send_gdb "attach $testpid\n"
   gdb_expect {
      -re ".*warning: reading register.*I.*O error.*$gdb_prompt $" {
         fail "attach call, read register 3 error"
     }
     -re "Attaching to.*process $testpid.*libc.*$gdb_prompt $" {
         pass "attach call"
     }
      -re "$gdb_prompt $" {fail "attach call"}
      timeout         {fail "(timeout) attach call"}
   }

   # See if other registers are problems
   #
   send_gdb "i r r3\n"
   gdb_expect {
       -re ".*warning: reading register.*$gdb_prompt $" {
           pass "CHFts23490: known bug"
       }
       -re ".*r3.*$gdb_prompt $" {
           pass "Bug fixed, Yayyy!"
       }
       timeout { fail "timeout on info reg" }
   }

   # Get rid of the process
   #
   gdb_test "p should_exit = 1" ".*"
   gdb_test "c" ".*Program exited normally.*"
   
   # Be paranoid
   #
    remote_exec build "kill -9 ${testpid}"

}


# Start with a fresh gdb
#
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}

# This is a test of gdb's ability to attach to a running process.
#
do_attach_tests

# Test attaching when the target is inside a system call
#
gdb_exit
gdb_start

# this seems not necessary. - guo
#
# # Since we have moved the executable to /tmp, it will be hard for gdb
# # to find the object file/executable to read the symbols.  This is
# # a known limitation.  We try and get the name of the executable the
# # process is running from a variety of methods, but none is foolproof.
# # Using "dir" will get us the symbols.
# 
# gdb_test "dir ./gdb.base" ".*" "set up directory before attach"
gdb_reinitialize_dir $srcdir/$subdir
do_call_attach_tests

# Cleanup the files placed in /tmp and the symlinks
  remote_exec build "rm -f ${binfile} ${binfile2} /tmp/attach1.${pid} /tmp/attach2.${pid}"

return 0