binutils-gdb/gdb/testsuite/gdb.trace/backtrace.exp

#   Copyright 1998-2017 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 <http://www.gnu.org/licenses/>.

# This file was written by Michael Snyder (msnyder@cygnus.com)

load_lib "trace-support.exp"

standard_testfile actions.c
set executable $testfile
set expfile $testfile.exp

if [prepare_for_testing "failed to prepare" $executable $srcfile \
	[list debug nowarnings]] {
    return -1
}

if ![runto_main] {
    fail "can't run to main to check for trace support"
    return -1
}

if { ![gdb_target_supports_trace] } then {
    unsupported "current target does not support trace"
    return 1

}

#
# test backtraces in trace frames
#

set testline1 0
set testline2 0
set testline3 0
set testline4 0
set testline5 0
set testline6 0

set arg1 1
set arg2 2
set arg3 3
set arg4 4
set arg5 5
set arg6 6

set baseline [gdb_find_recursion_test_baseline $srcfile]
if { $baseline == -1 } {
    fail "could not find gdb_recursion_test function"
    return
}

set return_me 0

gdb_test_multiple "list $baseline, +12" "all tests in this module will fail" {
    -re "\[\r\n\](\[0-9\]+).*gdbtestline 1 " {
	set testline1 $expect_out(1,string)
	exp_continue
    }
    -re "\[\r\n\](\[0-9\]+).*gdbtestline 2 " {
	set testline2 $expect_out(1,string)
	exp_continue
    }
    -re "\[\r\n\](\[0-9\]+).*gdbtestline 3 " {
	set testline3 $expect_out(1,string)
	exp_continue
    }
    -re "\[\r\n\](\[0-9\]+).*gdbtestline 4 " {
	set testline4 $expect_out(1,string)
	exp_continue
    }
    -re "\[\r\n\](\[0-9\]+).*gdbtestline 5 " {
	set testline5 $expect_out(1,string)
	exp_continue
    }
    -re "\[\r\n\](\[0-9\]+).*gdbtestline 6 " {
	set testline6 $expect_out(1,string)
	exp_continue
    }
    -re ".*$gdb_prompt $" {
	if { ($testline1 == 0) || ($testline2 == 0) || ($testline3 == 0) || ($testline4 == 0) || ($testline5 == 0) || ($testline6 == 0) } {
	    untested "unexpected testline values"
	    set return_me 1
all tests in this module will fail."
	}
    }
    default {
	    untested "couldn't match pattern"
	    set return_me 1
all tests in this module will fail."
    }
}

if { $return_me == 1 } then {
    return -1
}

#
# Setup backtrace experiment.  This will involve:
#   1) a tracepoint where nothing is collected
#   2) a tracepoint where only regs are collected
#   3) a tracepoint where regs, locals and args are collected
#   4) a tracepoint where regs plus some amount of stack are collected.
#

gdb_delete_tracepoints
set tdp2 [gdb_gettpnum $testline2]
set tdp3 [gdb_gettpnum $testline3]
set tdp4 [gdb_gettpnum $testline4]
set tdp5 [gdb_gettpnum $testline5]
set tdp6 [gdb_gettpnum $testline6]
if {    $tdp2 <= 0 || $tdp3 <= 0 || \
	$tdp4 <= 0 || $tdp5 <= 0 || $tdp6 <= 0 } then {
    fail "setting tracepoints failed"
    return
}

#gdb_trace_setactions "setup TP to collect FP" \
#	"$tdp2" \
#	"collect \$fp" ""
#

gdb_trace_setactions "8.6: setup TP to collect regs" \
	"$tdp3" \
	"collect \$regs" "^$"

gdb_trace_setactions "8.6: setup TP to collect regs, args, and locals" \
	"$tdp4" \
	"collect \$regs, \$args, \$locs" "^$"

gdb_trace_setactions "8.6: setup TP to collect stack mem cast expr" \
       "$tdp6" \
       "collect \$$fpreg, \(\*\(void \*\*\) \(\$$spreg\)\) @ 128" "^$"

gdb_test_no_output "tstart" ""

gdb_test "break end" ".*" ""
gdb_test "continue" \
    "Continuing.*Breakpoint $decimal, end.*" \
    "run trace experiment"

gdb_test_no_output "tstop" ""

proc gdb_backtrace_tdp_1 { msg } {
    global gdb_prompt
    
    # We are in a trace frame at which we didn't collect anything
    # except $PC.  Therefore we expect to be able to identify stack
    # frame #0, but that's about all.  In particular we do not expect
    # to be able to display the function's arguments or locals, and we
    # do not expect to be able to identify the caller of this function.
    
    gdb_test "backtrace" \
	"#0\[\t \]+gdb_recursion_test.*depth=.*" \
	"$msg"
}

proc gdb_backtrace_tdp_2 { msg } {
    global gdb_prompt

    # We are in a trace frame at which we collected only the registers
    # Therefore we expect to be able to identify stack frame #0, but
    # we don't expect to be able to display its args unles they are
    # passed in registers (which isn't the case for m68k), and we
    # don't expect to be able to identify the caller's stack frame.

    gdb_test "backtrace" \
	"#0\[\t \]+gdb_recursion_test.*depth=.*" \
	"$msg"
}

proc gdb_backtrace_tdp_3 { msg } {
    global gdb_prompt

    # We are in a trace frame at which we collected all registers, all
    # arguments and all locals.  This means that the display of
    # stack frame #0 should be complete (including argument values).

    gdb_test_multiple "backtrace" "$msg" {
	-re "#0\[\t \]+gdb_recursion_test.*depth=\[0-9\]+.*q1=\[0-9\]+.*q2=\[0-9\]+.*q3=\[0-9\]+.*q4=\[0-9\]+.*q5=\[0-9\]+.*q6=\[0-9\]+.*$gdb_prompt $" {
	    pass "$msg"
	}
	-re "#0\[\t \]+gdb_recursion_test.*depth=Cannot access.*$gdb_prompt $" {
	    fail "$msg (failed to collect arguments)"
	}
    }
}

proc gdb_backtrace_tdp_4 { msg depth traceframe } {
    global gdb_prompt

    with_test_prefix "traceframe $traceframe" {
	# We are in a trace frame at which we collected all registers,
	# plus a sizeable hunk of stack memory.  This should enable us to
	# display at least several stack frames worth of backtrace.  We'll
	# assume that if we can't display at least "depth" levels (with
	# args), it counts as an error.

	gdb_test_multiple "backtrace" "$msg" {
	    -re "#$depth\[\t \].*gdb_recursion_test.*depth=\[0-9\]+.*q1=\[0-9\]+.*q2=\[0-9\]+.*q3=\[0-9\]+.*q4=\[0-9\]+.*q5=\[0-9\]+.*q6=\[0-9\]+.*$gdb_prompt $" {
		pass "$msg"
	    }
	    -re "#$depth\[\t \].*gdb_recursion_test.*depth=.*$gdb_prompt $" {
		fail "$msg (args missing from #$depth stack frame)"
	    }
	    -re "#\[0-9\]+\[\t \].*gdb_recursion_test.*depth=.*$gdb_prompt $" {
		fail "$msg (fewer than $depth stack frames found)"
	    }
	}

	set output_string0 ""
	# Match the output of command 'tdump' and save it in
	# $output_string0.
	set test "tdump on frame 0"
	gdb_test_multiple "tdump" $test {
	    -re "tdump\[\r\n\]+(.*)\[\r\n\]+$gdb_prompt $" {
		set output_string0 $expect_out(1,string)
	    }
	}

	gdb_test "up" ".*" ""

	# Test that command 'tdump' still works properly when the
	# selected frame is not the current frame, and save the output
	# in $output_string1.
	set test "tdump on frame 1"
	set output_string1 ""
	gdb_test_multiple "tdump" $test {
	    -re "tdump\[\r\n\]+(.*)\[\r\n\]+$gdb_prompt $" {
		set output_string1 $expect_out(1,string)
	    }
	}

	# Output of 'tdump' on frame 0 and frame 1 should be
	# identical.
	gdb_assert ![string compare $output_string0 $output_string1] \
	    "tdump output"
    }
}

#
# begin backtrace test
#

set timeout 60

gdb_tfind_test "init: make sure not debugging any trace frame" "none" "-1"

gdb_tfind_test "8.6: find start frame" "start" "0"
gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
	"TDP $tdp2:" ""
gdb_backtrace_tdp_1 "8.6: Backtrace, depth == 1, collect nothing"

gdb_tfind_test "8.6: find frame 1"     "1" "1"
gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
	"TDP $tdp3:" ""
gdb_backtrace_tdp_2 "8.6: Backtrace, depth == 1, collect regs"

gdb_tfind_test "8.6: find frame 2"     "2" "2"
gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
	"TDP $tdp4:" ""
gdb_backtrace_tdp_3 "8.6: Backtrace, depth == 1, collect args and locals"


gdb_tfind_test "8.6: find frame 4"     "4" "4"
gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
	"TDP $tdp6:" ""
gdb_backtrace_tdp_4 "8.6: Backtrace, depth == 1, collect stack mem expr" "0" 4

gdb_tfind_test "8.6: find frame 5"     "5" "5"
gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
	"TDP $tdp2:" ""
gdb_backtrace_tdp_1 "8.6: Backtrace, depth == 2, collect nothing"

gdb_tfind_test "8.6: find frame 6"     "6" "6"
gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
	"TDP $tdp3:" ""
gdb_backtrace_tdp_2 "8.6: Backtrace, depth == 2, collect regs"

gdb_tfind_test "8.6: find frame 7"     "7" "7"
gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
	"TDP $tdp4:" ""
gdb_backtrace_tdp_3 "8.6: Backtrace, depth == 2, collect args and locals"


gdb_tfind_test "8.6: find frame 9"     "9" "9"
gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
	"TDP $tdp6:" ""
gdb_backtrace_tdp_4 "8.6: Backtrace, depth == 1, collect stack mem expr" "0" 9

gdb_tfind_test "8.6: find frame 10"    "10" "10"
gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
	"TDP $tdp2:" ""
gdb_backtrace_tdp_1 "8.6: Backtrace, depth == 3, collect nothing"

gdb_tfind_test "8.6: find frame 11"    "11" "11"
gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
	"TDP $tdp3:" ""
gdb_backtrace_tdp_2 "8.6: Backtrace, depth == 3, collect regs"

gdb_tfind_test "8.6: find frame 12"    "12" "12"
gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
	"TDP $tdp4:" ""
gdb_backtrace_tdp_3 "8.6: Backtrace, depth == 3, collect args and locals"


gdb_tfind_test "8.6: find frame 14"    "14" "14"
gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
	"TDP $tdp6:" ""
gdb_backtrace_tdp_4 "8.6: Backtrace, depth == 1, collect stack mem expr" "0" 14

gdb_tfind_test "8.6: find frame 15"    "15" "15"
gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
	"TDP $tdp2:" ""
gdb_backtrace_tdp_1 "8.6: Backtrace, depth == 4, collect nothing"

gdb_tfind_test "8.6: find frame 16"    "16" "16"
gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
	"TDP $tdp3:" ""
gdb_backtrace_tdp_2 "8.6: Backtrace, depth == 4, collect regs"

gdb_tfind_test "8.6: find frame 17"    "17" "17"
gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
	"TDP $tdp4:" ""
gdb_backtrace_tdp_3 "8.6: Backtrace, depth == 4, collect args and locals"


gdb_tfind_test "8.6: find frame 19"    "19" "19"
gdb_test "printf \"TDP \%d:\\n\", \$tracepoint" \
	"TDP $tdp6:" ""
gdb_backtrace_tdp_4 "8.6: Backtrace, depth == 1, collect stack mem expr" "0" 19

gdb_test "printf \"x \%d x\\n\", depth == 3" \
	"x 0 x" \
	"1.13: trace in recursion: depth not equal to 3"

# Finished!
gdb_test "tfind none" ".*" ""