path: root/gdb/testsuite/gdb.opt/inline-break.exp

# Copyright 2012-2019 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/>.

# Note that the testcase gdb.dwarf2/dw2-inline-break.exp largely
# mirrors this testcase, and should be updated if this testcase is
# changed.

standard_testfile

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

# Return a string that may be used to match the output of "info break NUM".
#
# Optional arguments:
#
# source    - the name of the source file
# func      - the name of the function
# disp      - the event disposition
# enabled   - enable state
# locs      - number of locations
# line      - source line number (ignored without -source)

proc break_info_1 {num args} {
    global decimal

    # Column delimiter
    set c {[\t ]+}

    # Row delimiter
    set end {[\r\n \t]+}

    # Table header
    set header "[join [list Num Type Disp Enb Address What] ${c}]"

    # Get/configure any optional parameters.
    parse_args [list {source ""} {func ".*"} {disp "keep"} \
		    {enabled "y"} {locs 1} [list line $decimal] \
		    {type "breakpoint"}]

    if {$source != ""} {
	set source "$source:$line"
    }

    # Result starts with the standard header.
    set result "$header${end}"

    # Set up for multi-location breakpoint marker.
    if {$locs == 1} {
	set multi ".*"
    } else {
	set multi "<MULTIPLE>${end}"
    }
    append result "[join [list $num $type $disp $enabled $multi] $c]"

    # Add location info.
    for {set i 1} {$i <= $locs} {incr i} {
	if {$locs > 1} {
	    append result "[join [list $num.$i $enabled] $c].*"
	}

	#  Add function/source file info.
	append result "in $func at .*$source${end}"
    }

    return $result
}

#
# func1 is a static inlined function that is called once.
# The result should be a single-location breakpoint.
#
gdb_test "break func1" \
    "Breakpoint.*at.* file .*$srcfile, line.*"

#
# func2 is a non-static inlined function that is called once.
# The result should be a breakpoint with two locations: the
# out-of-line function and the single inlined instance.
#
gdb_test "break func2" \
    "Breakpoint.*at.*func2.*\\(2 locations\\)"

#
# func3b is a static inlined function that is called once from
# within another static inlined function.  The result should be
# a single-location breakpoint.
#
gdb_test "break func3b" \
    "Breakpoint.*at.* file .*$srcfile, line.*"

#
# func4b is a static inlined function that is called once from
# within a non-static inlined function.  The result should be
# a breakpoint with two locations: the inlined instance within
# the inlined call to func4a in main, and the inlined instance
# within the out-of-line func4a.
#
gdb_test "break func4b" \
    "Breakpoint.*at.*func4b.*\\(2 locations\\)"

#
# func5b is a non-static inlined function that is called once
# from within a static inlined function.  The result should be a
# breakpoint with two locations: the out-of-line function and the
# inlined instance within the inlined call to func5a in main.
#
gdb_test "break func5b" \
    "Breakpoint.*at.*func5b.*\\(2 locations\\)"
#
# func6b is a non-static inlined function that is called once from
# within another non-static inlined function.  The result should be
# a breakpoint with three locations: the out-of-line function, the
# inlined instance within the out-of-line func6a, and the inlined
# instance within the inlined call to func6a in main,
#
gdb_test "break func6b" \
    "Breakpoint.*at.*func6b.*\\(3 locations\\)"

#
# func7b is a static inlined function that is called twice: once from
# func7a, and once from main.  The result should be a breakpoint with
# two locations: the inlined instance within the inlined instance of
# func7a, and the inlined instance within main.
#
gdb_test "break func7b" \
    "Breakpoint.*at.*func7b.*\\(2 locations\\)"

#
# func8b is a non-static inlined function that is called twice: once
# func8a, and once from main.  The result should be a breakpoint with
# three locations: the out-of-line function, the inlined instance
# within the inlined instance of func7a, and the inlined instance
# within main.
#
gdb_test "break func8b" \
    "Breakpoint.*at.*func8b.*\\(3 locations\\)"

#
# func1 is a static inlined function.  The result should be that no
# symbol is found to print.
#
gdb_test "print func1" \
    "No symbol \"func1\" in current context."

#
# func2 is a non-static inlined function.  The result should be that
# one symbol is found to print, and that the printed symbol is called
# "func2".  Note that this does not cover the failure case that two
# symbols were found, but that gdb chose the out-of-line copy to
# print, but if this was failing the "print func1" test would likely
# fail instead.
#
gdb_test "print func2" \
    "\\\$.* = {int \\(int\\)} .* <func2>"

# Test that "info break" reports the location of the breakpoints "inside"
# the inlined functions

set results(1) [break_info_1 1 -source $srcfile -func "func1"]
set results(2) [break_info_1 2 -locs 2 -source $srcfile -func "func2"]
set results(3) [break_info_1 3 -source $srcfile -func "func3b"]
set results(4) [break_info_1 4 -locs 2 -source $srcfile -func "func4b"]
set results(5) [break_info_1 5 -locs 2 -source $srcfile -func "func5b"]
set results(6) [break_info_1 6 -locs 3 -source $srcfile -func "func6b"]
set results(7) [break_info_1 7 -locs 2 -source $srcfile -func "func7b"]
set results(8) [break_info_1 8 -locs 3 -source $srcfile -func "func8b"]

for {set i 1} {$i <= [array size results]} {incr i} {
    send_log "Expecting: $results($i)\n"
    gdb_test "info break $i" $results($i)
}

# Test "permanent" and "temporary" breakpoints.
foreach_with_prefix cmd [list "break" "tbreak"] {

    # Start with a clean state.
    delete_breakpoints
    if {![runto main]} {
	untested "could not run to main"
	return -1
    }

    # Assemble flags to pass to gdb_breakpoint.  Lame but this is just
    # a test suite!
    set break_flags "message"
    if {[string match $cmd "tbreak"]} {
	lappend break_flags "temporary"
    }

    # Insert breakpoints for all inline_func? and not_inline_func? and check
    # that we actually stop where we think we should.
    for {set i 1} {$i < 4} {incr i} {
	foreach inline {"not_inline" "inline"} {
	    eval gdb_breakpoint "${inline}_func$i" $break_flags
	}
    }

    set ws {[\r\n\t ]+}
    set backtrace [list "(in|at)? main"]
    for {set i 3} {$i > 0} {incr i -1} {

	foreach inline {"not_inline" "inline"} {

	    # Check that we stop at the correct location and print out
	    # the (possibly) inlined frames.
	    set num [gdb_get_line_number "/* ${inline}_func$i  */"]
	    set pattern ".*$srcfile:$num${ws}.*$num${ws}int y = $decimal;"
	    append pattern "${ws}/\\\* ${inline}_func$i  \\\*/"
	    send_log "Expecting $pattern\n"
	    gdb_continue_to_breakpoint "${inline}_func$i" $pattern

	    # Also check for the correct backtrace.
	    set backtrace [linsert $backtrace 0 "(in|at)?${ws}${inline}_func$i"]
	    gdb_test_sequence "bt" "bt stopped in ${inline}_func$i" $backtrace
	}
    }
}

# func_extern_caller calls func_inline_caller which calls
# func_inline_callee.  The latter two are both inline functions.  Test
# that setting a breakpoint on each of the functions reports a stop at
# that function.  This exercises the inline frame skipping logic.  If
# we set a breakpoint at function A, we want to present the stop at A,
# even if A's entry code is an inlined call to another inline function
# B.

foreach_with_prefix func {
    "func_extern_caller"
    "func_inline_caller"
    "func_inline_callee"
} {
    clean_restart $binfile

    if {![runto main]} {
	untested "could not run to main"
	continue
    }

    gdb_breakpoint $func
    gdb_test "continue" "Breakpoint .* $func .*at .*$srcfile.*" \
	"breakpoint hit presents stop at breakpointed function"
}

# Test setting a breakpoint in an inline function by line number and
# by address, and that GDB presents the stop there.

set line [gdb_get_line_number "break here"]

with_test_prefix "line number" {
    clean_restart $binfile

    if {![runto main]} {
	untested "could not run to main"
	continue
    }

    # Set the breakpoint by line number, and check that GDB reports
    # the breakpoint location being the inline function.
    gdb_test "break $srcfile:$line" ".*Breakpoint .* at .*: file .*$srcfile, line $line."

    gdb_test "info break \$bpnum" "in func1 at .*$srcfile:$line"

    gdb_test "continue" "Breakpoint .*, func1 \\(x=1\\) at .*$srcfile:$line.*break here.*" \
	"breakpoint hit presents stop at inlined function"

    # Save the PC for the following by-address test.
    set address [get_hexadecimal_valueof "\$pc" "0"]
}

# Test setting a breakpoint in an inline function by address, and that
# GDB presents the stop there.

with_test_prefix "address" {

    clean_restart $binfile

    if {![runto main]} {
	untested "could not run to main"
	continue
    }

    # Set the breakpoint by address, and check that GDB reports the
    # breakpoint location being the inline function.
    gdb_test "break *$address" ".*Breakpoint .* at $address: file .*$srcfile, line $line."

    gdb_test "info break \$bpnum" "in func1 at .*$srcfile:$line"

    gdb_test "continue" "Breakpoint .*, func1 \\(x=1\\) at .*$srcfile:$line.*break here.*" \
	"breakpoint hit presents stop at inlined function"
}

with_test_prefix "check alignment" {

    clean_restart $binfile

    if {![runto main]} {
	untested "could not run to main"
	continue
    }

    gdb_test "break func4b" \
	"Breakpoint.*at.*func4b.*\\(2 locations\\)"

    set expected_line_length -1
    gdb_test_multiple "info break \$bpnum" "xxxx" {
	-re "Num     Type           Disp Enb Address            What\r\n" {
	    exp_continue
	}
	-re "($decimal \[^\r\n\]+)<MULTIPLE>\[^\r\n\]+\r\n" {
	    if {$expected_line_length != -1} {
		fail "multiple header lines seen"
	    }
	    set expected_line_length [string length $expect_out(1,string)]
	    exp_continue
	}
	-re "($decimal\.($decimal) \[^\r\n\]+)$hex\[^\r\n\]+\r\n" {
	    set len [string length $expect_out(1,string)]
	    set loc $expect_out(2,string)
	    gdb_assert {$len == $expected_line_length} \
		"check alignment of location line $loc"
	    exp_continue
	}
	-re "$gdb_prompt $" {
	}
    }
}

unset -nocomplain results