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# Copyright 2020-2021 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/>.
# Test defining a conditional breakpoint that applies to multiple
# locations with different contexts (e.g. different set of local vars).
standard_testfile .cc
if {[prepare_for_testing "failed to prepare" ${binfile} ${srcfile}]} {
return
}
set warning "warning: failed to validate condition"
set fill "\[^\r\n\]*"
# Location indices are determined by their address, which depends on
# how the compiler emits the code. We keep a map from the location
# index to the location context (i.e. A, Base, or C), so that we can
# write tests without hard-coding location indices.
set loc_name(1) ""
set loc_name(2) ""
set loc_name(3) ""
# And, for convenience, a reverse map from the name to the index.
set loc_index(A) 0
set loc_index(Base) 0
set loc_index(C) 0
# Find breakpoint location contexts.
proc find_location_contexts {} {
global loc_name loc_index bpnum1 fill
global decimal hex gdb_prompt
gdb_test_multiple "info breakpoint $bpnum1" "find_location_indices" {
-re "stop only if ${fill}\r\n" {
exp_continue
}
-re "^${bpnum1}\.($decimal) ${fill} ${hex} in (A|Base|C)::func${fill}\r\n" {
set index $expect_out(1,string)
set name $expect_out(2,string)
set loc_name($index) $name
set loc_index($name) $index
exp_continue
}
-re "$gdb_prompt $" {
verbose -log "Loc names: $loc_name(1), $loc_name(2), $loc_name(3)"
gdb_assert { ![string equal $loc_name(1) $loc_name(2)] }
gdb_assert { ![string equal $loc_name(1) $loc_name(3)] }
gdb_assert { ![string equal $loc_name(2) $loc_name(3)] }
gdb_assert { [string length $loc_name(1)] > 0 }
gdb_assert { [string length $loc_name(2)] > 0 }
gdb_assert { [string length $loc_name(3)] > 0 }
}
}
}
# Test the breakpoint location enabled states. STATES is a list of
# location states. We assume STATES to contain the state for A, Base,
# and C, and in this order. E.g. {N* y n} for 'N*' at A::func, 'y' at
# B::func, and 'n' at C::func, respectively.
proc check_bp_locations {bpnum states cond {msg ""}} {
global loc_name fill
# Map location names to location states.
set loc_states(A) [lindex $states 0]
set loc_states(Base) [lindex $states 1]
set loc_states(C) [lindex $states 2]
if {$cond == ""} {
set cond_info ""
} else {
set bp_hit_info "${fill}(\r\n${fill}breakpoint already hit 1 time)?"
set cond_info "\r\n${fill}stop only if ${cond}${bp_hit_info}"
}
set expected [multi_line \
"Num${fill}" \
"${bpnum}${fill}breakpoint${fill}keep y${fill}MULTIPLE${fill}${cond_info}" \
"${bpnum}.1${fill} $loc_states($loc_name(1)) ${fill}" \
"${bpnum}.2${fill} $loc_states($loc_name(2)) ${fill}" \
"${bpnum}.3${fill} $loc_states($loc_name(3)) ${fill}"]
if {[lsearch $states N*] >= 0} {
append expected "\r\n\\(\\*\\): Breakpoint condition is invalid at this location."
}
gdb_test "info break $bpnum" $expected "check bp $bpnum $msg"
}
# Scenario 1: Define breakpoints conditionally, using the "break N if
# cond" syntax. Run the program, check that we hit those locations
# only.
with_test_prefix "scenario 1" {
# Define the conditional breakpoints. Two locations (Base::func
# and C::func) should be disabled. We do not test location
# indices strictly at this moment, because we don't know them,
# yet. We have strict location index tests below.
gdb_test "break func if a == 10" \
[multi_line \
"${warning} at location $decimal, disabling:" \
" No symbol \"a\" in current context." \
"${warning} at location $decimal, disabling:" \
" No symbol \"a\" in current context." \
"Breakpoint $decimal at $fill .3 locations."] \
"define bp with condition a == 10"
set bpnum1 [get_integer_valueof "\$bpnum" 0 "get bpnum1"]
gdb_test "break func if c == 30" \
[multi_line \
".*${warning} at location $decimal, disabling:" \
" No symbol \"c\" in current context." \
".*${warning} at location $decimal, disabling:" \
" No symbol \"c\" in current context." \
".*Breakpoint $decimal at $fill .3 locations."] \
"define bp with condition c == 30"
set bpnum2 [get_integer_valueof "\$bpnum" 0 "get bpnum2"]
find_location_contexts
with_test_prefix "before run" {
check_bp_locations $bpnum1 {y N* N*} "a == 10"
check_bp_locations $bpnum2 {N* N* y} "c == 30"
}
# Do not use runto_main, it deletes all breakpoints.
gdb_run_cmd
# Check our conditional breakpoints.
gdb_test "" ".*Breakpoint \[0-9\]+, A::func .*" \
"run until A::func"
gdb_test "print a" " = 10"
gdb_test "continue" "Continuing.*Breakpoint \[0-9\]+, C::func .*" \
"run until C::func"
gdb_test "print c" " = 30"
# No more hits!
gdb_continue_to_end
with_test_prefix "after run" {
check_bp_locations $bpnum1 {y N* N*} "a == 10"
check_bp_locations $bpnum2 {N* N* y} "c == 30"
}
}
# Start GDB with two breakpoints and define the conditions separately.
proc setup_bps {} {
global srcfile binfile srcfile2 decimal
global bpnum1 bpnum2 bp_location warning loc_index
clean_restart ${binfile}
# Define the breakpoints.
gdb_breakpoint "func"
set bpnum1 [get_integer_valueof "\$bpnum" 0 "get bpnum1"]
gdb_breakpoint "func"
set bpnum2 [get_integer_valueof "\$bpnum" 0 "get bpnum2"]
# Defining a condition on 'a' disables 2 locations.
set locs [lsort -integer "$loc_index(Base) $loc_index(C)"]
gdb_test "cond $bpnum1 a == 10" \
[multi_line \
"$warning at location ${bpnum1}.[lindex $locs 0], disabling:" \
" No symbol \"a\" in current context." \
"$warning at location ${bpnum1}.[lindex $locs 1], disabling:" \
" No symbol \"a\" in current context."]
# Defining a condition on 'c' disables 2 locations.
set locs [lsort -integer "$loc_index(Base) $loc_index(A)"]
gdb_test "cond $bpnum2 c == 30" \
[multi_line \
"$warning at location ${bpnum2}.[lindex $locs 0], disabling:" \
" No symbol \"c\" in current context." \
"$warning at location ${bpnum2}.[lindex $locs 1], disabling:" \
" No symbol \"c\" in current context."]
}
# Scenario 2: Define breakpoints unconditionally, and then define
# conditions using the "cond N <cond>" syntax. Expect that the
# locations where <cond> is not evaluatable are disabled. Run the
# program, check that we hit the enabled locations only.
with_test_prefix "scenario 2" {
setup_bps
with_test_prefix "before run" {
check_bp_locations $bpnum1 {y N* N*} "a == 10"
check_bp_locations $bpnum2 {N* N* y} "c == 30"
}
# Do not use runto_main, it deletes all breakpoints.
gdb_run_cmd
# Check that we hit enabled locations only.
gdb_test "" ".*Breakpoint \[0-9\]+, A::func .*" \
"run until A::func"
gdb_test "print a" " = 10"
gdb_test "continue" "Continuing.*Breakpoint \[0-9\]+, C::func .*" \
"run until C::func"
gdb_test "print c" " = 30"
# No more hits!
gdb_continue_to_end
with_test_prefix "after run" {
check_bp_locations $bpnum1 {y N* N*} "a == 10"
check_bp_locations $bpnum2 {N* N* y} "c == 30"
}
}
# Scenario 3: Apply misc. checks on the already-defined breakpoints.
with_test_prefix "scenario 3" {
setup_bps
set locs [lsort -integer "$loc_index(Base) $loc_index(A)"]
gdb_test "cond $bpnum1 c == 30" \
[multi_line \
"${warning} at location ${bpnum1}.[lindex $locs 0], disabling:" \
" No symbol \"c\" in current context." \
"${warning} at location ${bpnum1}.[lindex $locs 1], disabling:" \
" No symbol \"c\" in current context." \
"Breakpoint ${bpnum1}'s condition is now valid at location $loc_index(C), enabling."] \
"change the condition of bp 1"
check_bp_locations $bpnum1 {N* N* y} "c == 30" "after changing the condition"
gdb_test "cond $bpnum1" \
[multi_line \
"Breakpoint ${bpnum1}'s condition is now valid at location [lindex $locs 0], enabling." \
"Breakpoint ${bpnum1}'s condition is now valid at location [lindex $locs 1], enabling." \
"Breakpoint ${bpnum1} now unconditional."] \
"reset the condition of bp 1"
check_bp_locations $bpnum1 {y y y} "" "after resetting the condition"
gdb_test_no_output "disable ${bpnum2}.$loc_index(A)"
check_bp_locations $bpnum2 {N* N* y} "c == 30" "after disabling loc for A"
gdb_test "cond $bpnum2" ".*" "reset the condition of bp 2"
check_bp_locations $bpnum2 {n y y} "" "loc for A should remain disabled"
gdb_test_no_output "disable ${bpnum2}.$loc_index(C)"
check_bp_locations $bpnum2 {n y n} "" "after disabling loc for C"
gdb_test "cond $bpnum2 c == 30" \
[multi_line \
"${warning} at location ${bpnum2}.$loc_index(Base), disabling:" \
" No symbol \"c\" in current context."] \
"re-define a condition"
check_bp_locations $bpnum2 {N* N* n} "c == 30" "loc for C should remain disabled"
gdb_test "enable ${bpnum2}.$loc_index(Base)" \
"Breakpoint ${bpnum2}'s condition is invalid at location $loc_index(Base), cannot enable." \
"reject enabling a location that is disabled-by-cond"
check_bp_locations $bpnum2 {N* N* n} "c == 30" "after enable attempt"
gdb_test "cond $bpnum2 garbage" \
"No symbol \"garbage\" in current context." \
"reject condition if bad for all locations"
gdb_test_no_output "delete $bpnum1"
# Do not use runto_main, it deletes all breakpoints.
gdb_breakpoint "main"
gdb_run_cmd
gdb_test "" ".*reakpoint .*, main .*${srcfile}.*" "start"
# The second BP's locations are all disabled. No more hits!
gdb_continue_to_end
}
# Scenario 4: Test the '-force'/'-force-condition' flag.
with_test_prefix "force" {
clean_restart ${binfile}
gdb_breakpoint "func"
# Pick a condition that is invalid at every location.
set bpnum1 [get_integer_valueof "\$bpnum" 0 "get bpnum1"]
gdb_test "cond -force $bpnum1 foo" \
[multi_line \
"${warning} at location ${bpnum1}.1, disabling:" \
" No symbol \"foo\" in current context." \
"${warning} at location ${bpnum1}.2, disabling:" \
" No symbol \"foo\" in current context." \
"${warning} at location ${bpnum1}.3, disabling:" \
" No symbol \"foo\" in current context."] \
"force the condition of bp 1"
check_bp_locations $bpnum1 {N* N* N*} "foo" "after forcing the condition"
# Now with the 'break' command.
gdb_breakpoint "func -force-condition if baz"
set bpnum2 [get_integer_valueof "\$bpnum" 0 "get bpnum2"]
check_bp_locations $bpnum2 {N* N* N*} "baz" "set using the break command"
}