gdb/testsuite/gdb.opt/inline-cmds.exp

# Copyright 2008-2021 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/>.

load_lib mi-support.exp
set MIFLAGS "-i=mi"

standard_testfile .c inline-markers.c

if {[prepare_for_testing "failed to prepare" $testfile \
	 [list $srcfile $srcfile2] {debug additional_flags=-Winline}]} {
    return -1
}

gdb_test_no_output "set listsize 1"

runto_main

get_compiler_info
get_debug_format
if { [skip_inline_frame_tests] } {
    untested "skipping inline frame tests"
    return
}

# First, check that the things we expected to be inlined really were,
# and those that shouldn't be weren't.
set line1 [gdb_get_line_number "set breakpoint 1 here" ${srcfile2}]
gdb_breakpoint $srcfile2:$line1
set line2 [gdb_get_line_number "set breakpoint 2 here" ${srcfile2}]
gdb_breakpoint $srcfile2:$line2

gdb_test "continue" ".*set breakpoint 1 here.*" "continue to bar (1)"
gdb_test "backtrace" "#0  bar.*#1  .*func1.*#2  .*main.*" \
    "backtrace from bar (1)"
gdb_test "up" "#1  .*func1.*" "up from bar (1)"
gdb_test "info frame" ".*inlined into frame.*" "func1 inlined (1)"

gdb_test "continue" ".*set breakpoint 1 here.*" "continue to bar (2)"
gdb_test "backtrace" "#0  bar.*#1  .*func1.*#2  .*func2.*#3  .*main.*" \
    "backtrace from bar (2)"
gdb_test "up" "#1  .*func1.*" "up from bar (2)"
gdb_test "info frame" ".*inlined into frame.*" "func1 inlined (2)"
gdb_test "up" "#2  .*func2.*" "up from func1 (2)"
gdb_test "info frame" ".*inlined into frame.*" "func2 inlined (2)"

gdb_test "continue" ".*set breakpoint 2 here.*" "continue to marker"
gdb_test "backtrace" "#0  marker.*#1  .*main.*" "backtrace from marker"
gdb_test "info frame" ".*called by frame.*" "marker not inlined"

# Next, check that we can next over inlined functions.  We should not end up
# inside any of them.
delete_breakpoints
runto_main

# The lines before the first inlined call.
set first "x = 7|y = 8"

# Some extra lines that end up in our stepping due to code motion.
set opt "start of main|result = 0"

# We start this test with a "list" instead of a "next", in case the
# first non-prologue instruction in main comes from the inlined function.
set msg "next over inlined functions"
gdb_test_multiple "list" $msg {
    -re "($first|result = func1|result = func2|$opt).*$gdb_prompt $" {
	send_gdb "next\r"
	exp_continue
    }
    -re "marker \\\(\\\);\r\n$gdb_prompt $" {
	pass $msg
    }
}

# Check that when next shows the call of func1, it has not happened yet.
runto_main

# Like the return value of gdb_test: -1 something is wrong, 0 passed, 1 failed.
set bt_test -1
set x_test -1
set func1_step -1

set last_was_func1_call 0
set msg "next past inlined func1"
gdb_test_multiple "list" $msg {
    -re "($first|$opt).*$gdb_prompt $" {
	set last_was_func1_call 0
	send_gdb "next\r"
	exp_continue
    }
    -re "result = func1 \\\(\\\);\r\n$gdb_prompt $" {
	# Check whether x has been set.  If 0, we may be doing something
	# else associated with this line besides the inlined call - e.g.
	# loading the address of result.  If 7, we may be at the call site.
	# If 15, though, we might be past the call and back at the store to
	# result - that's OK, as long as we weren't just here (see
	# func1_step above).
	set x_val -1
	gdb_test_multiple "print x" "" {
	    -re "\\\$$decimal = (\[0-9\]*)\r\n$gdb_prompt $" {
		set x_val $expect_out(1,string)
	    }
	    -re "$gdb_prompt $" { }
	}
	if { $x_val == 0 || $x_val == 7 } {
	    if { $x_test != 1 } {
		set x_test 0
	    }
	} elseif { $x_val == 15 } {
	    if { $func1_step == -1 } {
		# We passed func1 without stopping at the call site.
		set x_test 1
	    }
	} else {
	    set x_test 1
	}

	# func1 should not show up on backtraces if we are at its call
	# site.
	if { $bt_test != 1 } {
	    set bt_test [gdb_test "backtrace" "#0  \[^#]*main.*" ""]
	}

	# When we next over func1, we should not return to the same
	# line.  But we might go past the line, according to source
	# code order, and then come back.  A valid but odd layout is
	# body of func1, load result's address into a register using
	# the source location of "result = 0" several lines down, and
	# then return to this line for the store.  GCC 4.3 does that
	# on ARM.
	if { $last_was_func1_call } {
	    set func1_step 1
	} elseif { $func1_step == -1 } {
	    set func1_step 0
	}
	set last_was_func1_call 1

	send_gdb "next\r"
	exp_continue
    }

    -re "result = func2 \\\(\\\);\r\n$gdb_prompt $" {
	pass $msg
    }
}

if { $x_test == 0 } {
    pass "print x before func1"
} else {
    fail "print x before func1"
}

if { $bt_test == 0 } {
    pass "backtrace does not include func1"
} else {
    fail "backtrace does not include func1"
}

if { $bt_test == 0 } {
    pass "stepped over call to func1"
} else {
    fail "stepped over call to func1"
}

# Next, check that we can single step into inlined functions.  We should always
# "stop" at the call sites before entering them.
runto_main

set msg "step into func1"
set saw_call_site 0
gdb_test_multiple "list" $msg {
    -re "($first|$opt).*$gdb_prompt $" {
	send_gdb "step\r"
	exp_continue
    }
    -re "result = func1.*$gdb_prompt $" {
	set saw_call_site 1
	send_gdb "step\r"
	exp_continue
    }
    -re "func1 \\\(\\\) at .*\r\n$decimal.*bar \\\(\\\);\r\n$gdb_prompt $" {
	if { $saw_call_site } {
	    pass $msg
	} else {
	    fail $msg
	}
    }
}

# Check finish out of an inlined function.
set msg "finish from func1"
gdb_test_multiple "finish" $msg {
    -re "result = func1 \\\(\\\);\r\n$gdb_prompt $" {
	pass $msg
    }
    -re "($first|$opt).*$gdb_prompt $" {
	# Whoops.  We finished, but ended up back at an earlier line.  Keep
	# trying.
	send_gdb "step\r"
	exp_continue
    }
    -re "func1 \\\(\\\) at .*\r\n$decimal.*bar \\\(\\\);\r\n$gdb_prompt $" {
	send_gdb "finish\r"
	exp_continue
    }
}

# Test some corner cases involving consecutive inlined functions.
set line3 [gdb_get_line_number "set breakpoint 3 here"]
gdb_breakpoint $line3
gdb_continue_to_breakpoint "consecutive func1"

gdb_test "next" ".*func1 .*first call.*" "next to first func1"
gdb_test "next" ".*func1 .*second call.*" "next to second func1"

# It is easier when the two inlined functions are not on the same line.
set line4 [gdb_get_line_number "set breakpoint 4 here"]
gdb_breakpoint $line4
gdb_continue_to_breakpoint "func1 then func3"

gdb_test "next" ".*func1 \\\(\\\);" "next to func1 before func3"
gdb_test "next" ".*func3 \\\(\\\);" "next to func3"

# Test finishing out of one thing and into another.
set line5 [gdb_get_line_number "set breakpoint 5 here"]
gdb_breakpoint $line5
gdb_continue_to_breakpoint "finish into func1"

gdb_test "next" ".*marker \\\(\\\);" "next to finish marker"
gdb_test "step" ".*set breakpoint 2 here.*" "step into finish marker"

# Some architectures will have one or more instructions after
# the call instruction which still are part of the call sequence,
# so it should be expected to return to the caller line after issue 
# a 'finish' command.
gdb_test_multiple "finish" "finish from marker" {
    -re "func1 \\\(\\\);.*\r\n$gdb_prompt $" {
	pass "finish from marker to func1"
    }
    -re "marker \\\(\\\);.*\r\n$gdb_prompt $" {
	pass "finish from marker"
	gdb_test "step" "func1 \\\(\\\);.*" "step after marker to reach func1"
    }
}

gdb_test "step" "bar \\\(\\\);" "step into func1 for finish"
gdb_test "finish" "func3 \\\(\\\);" "finish from func1 to func3"

# Test a deeper call stack.
set line6 [gdb_get_line_number "set breakpoint 6 here"]
gdb_breakpoint $line6
gdb_continue_to_breakpoint "before the outer_inline call"
gdb_test "step" "marker \\\(\\\) at .*" "reach 1 the outer_inline call"
gdb_test_multiple "finish" "finish from marker" {
    -re "main \\\(\\\) at .*outer_inline2 \\\(\\\);.*\r\n$gdb_prompt $" {
	pass "reach outer_inline2"
    }
    -re "main \\\(\\\) at .*marker \\\(\\\);.*\r\n$gdb_prompt $" {
	pass "finish from marker"
	gdb_test "step" "outer_inline2 \\\(\\\);.*" "step after marker to reach outer_inline2"
    }
}
gdb_test "bt" "#0  main.*" "backtrace at main of outer_inline"
gdb_test "step" "outer_inline2 \\\(\\\) at .*" "enter outer_inline2"
gdb_test "bt" "#0  outer_inline2.*#1  main.*" "backtrace at outer_inline2"
gdb_test "step" "outer_inline1 \\\(\\\) at .*" "enter outer_inline1 from outer_inline2"

set msg "backtrace at outer_inline1"
gdb_test_multiple "bt" $msg {
    -re "#0  outer_inline1.*#1  outer_inline2.*#2  main.*$gdb_prompt $" {
	pass $msg
    }
    -re "#0  $hex in outer_inline1.*#1  outer_inline2.*#2  main.*$gdb_prompt $" {
	# Binutils PR gas/6717.  Gas moves .loc past .p2align and the
	# leading nop of the inlined call appears to be on the same line
	# as main's call to marker.
	xfail $msg
	gdb_test "step" "noinline \\\(\\\);" "step to call of noinline"
    }
}

gdb_test "step" "noinline \\\(\\\) at .*" "enter noinline from outer_inline1"
gdb_test "bt" "#0  noinline.*#1  .*outer_inline1.*#2  .*outer_inline2.*#3  main.*" "backtrace at noinline from outer_inline1"
gdb_test "step" "inlined_fn \\\(\\\) at .*" "enter inlined_fn from noinline"
gdb_test "bt" "#0  inlined_fn.*#1  noinline.*#2  .*outer_inline1.*#3  .*outer_inline2.*#4  main.*" "backtrace at inlined_fn from noinline"
gdb_test "info frame" ".*inlined into frame.*" "inlined_fn from noinline inlined"
gdb_test "up" "#1  noinline.*" "up to noinline"
gdb_test "info frame" ".*\n called by frame.*" "noinline from outer_inline1 not inlined"
gdb_test "up" "#2  .*outer_inline1.*" "up to outer_inline1"
gdb_test "info frame" ".*inlined into frame.*" "outer_inline1 inlined"
gdb_test "up" "#3  .*outer_inline2.*" "up to outer_inline2"
gdb_test "info frame" ".*inlined into frame.*" "outer_inline2 inlined"
gdb_test "up" "#4  main.*" "up from outer_inline2"
gdb_test "info frame" ".*\n caller of frame.*" "main not inlined"

gdb_exit

# Send a CLI "step" command over MI.  CLI_OUTPUT_RE is a regexp that
# matches the expected CLI output.  MESSAGE is used as test message.

proc mi_cli_step {cli_output_re message} {
    global mi_gdb_prompt
    global srcfile
    global decimal

    send_gdb "interpreter-exec console \"step\"\n"
    gdb_expect {
	-re "\\^running\r\n\\*running,thread-id=\"all\"\r\n${mi_gdb_prompt}${cli_output_re}" {
	    pass $message
	}
	timeout {
	    fail "$message (timeout)"
	}
	eof {
	    fail "$message (eof)"
	}
    }

    # mi_expect_stop handles "set mi-async on/off" differences.
    mi_expect_stop "end-stepping-range" "\[^\r\n\]*" "" ".*$srcfile" "$decimal" \
	"" "got *stopped for $message"
}

# Test that stepping into an inlined function with the CLI "step"
# command run while the top interpreter is MI results in the expected
# CLI output sent to MI's console.
with_test_prefix "mi" {
    if [mi_gdb_start] {
	continue
    }
    mi_gdb_load ${binfile}
    mi_runto_main

    set line_number [gdb_get_line_number "set mi break here"]
    mi_gdb_test "-break-insert ${srcfile}:${line_number}" \
	{\^done,bkpt=.number="2",type="breakpoint".*\}} \
	"set breakpoint"

    mi_execute_to "exec-continue" "breakpoint-hit" "main" "" ".*" ".*" \
	{ "" "disp=\"keep\"" } "breakpoint hit"

    incr line_number 2

    # Step to the line that does an inline call.
    set re "~\"$line_number\\\\t  result = func1 \\(\\);\\\\n\"\r\n"
    mi_cli_step "${re}" "step to inline call"

    # Step into the inlined function.
    set re [multi_line \
		"~\"func1 \\(\\) at .*$srcfile:$decimal\\\\n\"" \
		"~\"$decimal\\\\t  bar \\(\\);\\\\n\"\r\n"]
    mi_cli_step "${re}" "step into inline call"
}