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# Copyright 2014-2025 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 that trying to inserting a hw breakpoint in a shared library
# when the target doesn't support hw breakpoints doesn't silently
# error out without informing the user.
require allow_shlib_tests
set main_src hbreak-in-shr-unsupported.c
set lib_src hbreak-in-shr-unsupported-shr.c
standard_testfile ${main_src} ${lib_src}
set lib_basename hbreak-in-shr-unsupported-shr.so
set lib_so [standard_output_file ${lib_basename}]
set lib_opts "debug"
set exec_opts [list debug shlib=${lib_so}]
if { [gdb_compile_shlib ${srcdir}/${subdir}/${lib_src} ${lib_so} $lib_opts] != ""
|| [gdb_compile ${srcdir}/${subdir}/${main_src} ${binfile} executable $exec_opts] != ""} {
untested "failed to compile"
return -1
}
clean_restart $binfile
gdb_load_shlib $lib_so
if {![runto_main]} {
return -1
}
# Get main breakpoint out of the way.
delete_breakpoints
# Easier to test if GDB inserts breakpoints immediately.
gdb_test_no_output "set breakpoint always-inserted on"
# Force-disable Z1 packets, in case the target actually supports
# these.
if {[gdb_protocol_is_remote]} {
gdb_test \
"set remote Z-packet off" \
"Use of Z packets on the current remote target is set to \"off\"."
}
# Probe for hw breakpoints support. With Z packets disabled, this
# should always fail with remote targets. For other targets, with no
# way to force-disable hw breakpoints support, best we can do is skip
# the remainder of the test if hardware breakpoint insertion in a
# function in the main executable succeeds.
set cant_insert_hbreak 0
set supports_hbreak 0
set test "probe hbreak support"
gdb_test_multiple "hbreak -q main" $test {
-re "No hardware breakpoint support in the target.*$gdb_prompt $" {
pass $test
}
-re "Hardware breakpoints used exceeds limit.*$gdb_prompt $" {
pass $test
}
-re "Cannot insert hardware breakpoint.*$gdb_prompt $" {
set cant_insert_hbreak 1
set supports_hbreak 1
pass $test
}
-re "Hardware assisted breakpoint.*at.* file .*$srcfile, line.*$gdb_prompt $" {
set supports_hbreak 1
if {[gdb_protocol_is_remote]} {
# Z-packets have been force-disabled, so this shouldn't
# happen.
fail $test
} else {
pass $test
}
}
}
if {!$supports_hbreak} {
unsupported "no hbreak support"
return
}
if {!$cant_insert_hbreak} {
unsupported "can't disable hw breakpoint support"
return
}
# Get previous hw breakpoint out of the way.
delete_breakpoints
# Without target support, this should always complain. GDB used to
# suppress the error if the breakpoint was set in a shared library.
# While that makes sense for software breakpoints (the memory might be
# unmapped), it doesn't for hardware breakpoints, as those by
# definition are implemented using a mechanism that is not dependent
# on being able to modify the target's memory.
gdb_test "hbreak shrfunc" "Cannot insert hardware breakpoint.*" \
"hbreak shrfunc complains"
gdb_test "info break" "hw breakpoint.*y.*$hex.*in shrfunc at.*" \
"breakpoint not pending"
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