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# This testcase is part of GDB, the GNU debugger.

# Copyright 1997, 1998, 1999, 2000, 2002, 2001, 2003, 2004, 2007, 2008, 2009,

# 2010 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 3 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, see .  */

# step-test.exp -- Expect script to test stepping in gdb

if $tracelevel then {

    strace $tracelevel

}

set testfile step-test

set srcfile ${testfile}.c

set binfile ${objdir}/${subdir}/${testfile}

remote_exec build "rm -f ${binfile}"

if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {

     untested step-test.exp

     return -1

}

gdb_exit

gdb_start

gdb_reinitialize_dir $srcdir/$subdir

gdb_load ${binfile}

if ![runto_main] then {

   fail "Can't run to main"

   return 0

}

# Set a breakpoint at line 45, if stepi then finish fails, we would

# run to the end of the program, which would mess up the rest of the tests.

# Vanilla step/next

#

gdb_test "next" ".*${decimal}.*x = 1;.*" "next 1"

gdb_test "step" ".*${decimal}.*y = 2;.*" "step 1"

# With count

#

gdb_test "next 2" ".*${decimal}.*w = w.*2;.*" "next 2"

gdb_test "step 3" ".*${decimal}.*z = z.*5;.*" "step 3"

gdb_test "next" ".*${decimal}.*callee.*OVER.*" "next 3"

# Step over call

#

gdb_test "next" ".*${decimal}.*callee.*INTO.*" "next over"

# Step into call

#

gdb_test "step" ".*${decimal}.*myglob.*"   "step into"

# Step out of call

#

# I wonder if this is really portable.  Are there any caller-saves

# platforms, on which `finish' will return you to some kind of pop

# instruction, which is attributed to the line containing the function

# call?

# On PA64, we end up at a different instruction than PA32.

# On IA-64, we also end up on callee instead of on the next line due

# to the restoration of the global pointer (which is a caller-save).

# Similarly on MIPS PIC targets.

set test "step out"

if { [istarget "hppa2.0w-hp-hpux*"] || [istarget "ia64-*-*"] || [istarget "mips*-*-*"]} {

    gdb_test_multiple "finish" "$test" {

        -re ".*${decimal}.*a.*5.*= a.*3.*$gdb_prompt $" {

            pass "$test"

        }

        -re ".*${decimal}.*callee.*INTO.*$gdb_prompt $" {

            pass "$test"

        }

    }

} else {

    gdb_test "finish" ".*${decimal}.*a.*5.*= a.*3.*" "step out"

}

### Testing nexti and stepi.

###

### test_i NAME COMMAND HERE THERE

###

### Send COMMAND to gdb over and over, while the output matches the

### regexp HERE, followed by the gdb prompt.  Pass if the output

### eventually matches the regexp THERE, followed by the gdb prompt;

### fail if we have to iterate more than a hundred times, we time out

### talking to gdb, or we get output which is neither HERE nor THERE.  :)

###

### Use NAME as the name of the test.

###

### The exact regexps used are "$HERE.*$gdb_prompt $"

###                        and "$THERE.*$gdb_prompt $"

###

proc test_i {name command here there} {

    global gdb_prompt

    set i 0

    gdb_test_multiple "$command" "$name" {

        -re "$here.*$gdb_prompt $" {

            # Have we gone for too many steps without seeing any progress?

            if {[incr i] >= 100} {

                fail "$name (no progress after 100 steps)"

                return

            }

            send_gdb "$command\n"

            exp_continue

        }

        -re "$there.*$gdb_prompt $" {

            # We've reached the next line.  Rah.

            pass "$name"

            return

        }

    }

}

test_i "stepi to next line" "stepi" \

       ".*${decimal}.*a.*5.* = a.*3" \

       ".*${decimal}.*callee.*STEPI"

# Continue to step until we enter the function.  Also keep stepping

# if this passes through a (useless) PLT entry.

test_i "stepi into function" "stepi" \

       "(.*${decimal}.*callee.*STEPI|.* in callee@plt)" \

       ".*callee \\(\\) at .*step-test\\.c"

# Continue to step until we reach the function's body.  This makes it

# more likely that we've actually completed the prologue, so "finish"

# will work.

test_i "stepi into function's first source line" "stepi" \

        ".*${decimal}.*int callee" \

        ".*${decimal}.*myglob.*; return 0;"

# Have to be careful here, if the finish does not work,

# then we may run to the end of the program, which

# will cause erroneous failures in the rest of the tests

set test "stepi: finish call"

gdb_test_multiple "finish" "$test" {

    -re ".*${decimal}.*callee.*NEXTI.*$gdb_prompt $" {

        pass "$test"

    }

    -re ".*(Program received|Program exited).*$gdb_prompt $" {

        # Oops... We ran to the end of the program...  Better reset

        if {![runto_main]} then {

            fail "$test (Can't run to main)"

            return 0

        }

        if {![runto step-test.c:45]} {

            fail "$test (Can't run to line 45)"

            return 0

        }

        fail "$test"

    }

    -re ".*${decimal}.*callee.*STEPI.*$gdb_prompt $" {

        # On PA64, we end up at a different instruction than PA32.

        # On IA-64, we end up on callee instead of on the following line due

        # to the restoration of the global pointer.

        # Similarly on MIPS PIC targets.

        if { [istarget "hppa2.0w-hp-hpux*"] || [istarget "ia64-*-*"] || [istarget "mips*-*-*"] } {

            test_i "$test" "stepi" \

                ".*${decimal}.*callee.*STEPI"  ".*${decimal}.*callee.*NEXTI"

        } else {

            fail "$test"

        }

    }

}

test_i "nexti over function" "nexti" \

       ".*${decimal}.*callee.*NEXTI" \

       ".*${decimal}.*y = w \\+ z;"

# On some platforms, if we try to step into a function call that

# passes a large structure by value, then we actually end up stepping

# into memcpy, bcopy, or some such --- GCC emits the call to pass the

# argument.  Opinion is bitterly divided about whether this is the

# right behavior for GDB or not, but we'll catch it here, so folks

# won't forget about it.

# Update 4/4/2002 - Regardless of which opinion you have, you would

# probably have to agree that gdb is currently behaving as designed,

# in the absence of additional code to not stop in functions used

# internally by the compiler.  Since the testsuite should be checking

# for conformance to the design, the correct behavior is to accept the

# cases where gdb stops in memcpy/bcopy.

gdb_test \

  "break [gdb_get_line_number "step-test.exp: large struct by value"]" \

  ".*Breakpoint.* at .*" \

  "set breakpoint at call to large_struct_by_value"

gdb_test "continue" \

         ".*Breakpoint ${decimal},.*large_struct_by_value.*" \

         "run to pass large struct"

set test "large struct by value"

gdb_test_multiple "step" "$test" {

    -re ".*step-test.exp: arrive here 1.*$gdb_prompt $" {

        pass "$test"

    }

    -re ".*(memcpy|bcopy).*$gdb_prompt $" {

        send_gdb "finish\n" ; gdb_expect -re "$gdb_prompt $"

        send_gdb "step\n"

        exp_continue

    }

}

gdb_continue_to_end "step-test.exp"

return 0