gdb/testsuite/gdb.cp/breakpoint-shlib-func.exp

# Copyright 2022-2024 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/>.

# Places a breakpoint on a function in a shared library before the
# inferior has started.  GDB will place the breakpoint on the @plt
# symbol in the main executable.
#
# When the inferior is started GDB will re-evaluate the breakpoint
# location and move the breakpoint to the function implementation in
# the shared library.
#
# Then, with the inferior started, delete all breakpoints, and
# re-create the breakpoint on the shared library function, GDB should
# place a single breakpoint on the function implementation in the
# shared library.

require allow_shlib_tests

standard_testfile .cc -lib.cc

set libobj [standard_output_file libfoo.so]
if {[build_executable "build shared library" $libobj $srcfile2 \
	 {debug c++ shlib}] != 0} {
    return -1
}

if {[prepare_for_testing "failed to prepare" $testfile $srcfile \
	 [list debug c++ shlib=$libobj]]} {
    return -1
}

gdb_load_shlib $libobj

# Place the breakpoint before the shared library has been loaded, the
# breakpoint should be placed on the @plt symbol.
gdb_test "break foo" "Breakpoint $decimal at $hex"
gdb_test "info breakpoints" "<foo\\(\\)@plt>"

# Runto main, but don't delete all the breakpoints.
if {![runto_main no-delete-breakpoints]} {
    return -1
}

# The breakpoint should now be showing in `foo` for real.
gdb_test "info breakpoints" \
    "\r\n$decimal\\s+\[^\r\n\]+ in foo\\(\\) at \[^\r\n\]+\r\n.*" \
    "check breakpoints after starting the inferior"

# Now we can delete the breakpoints.
delete_breakpoints

# And recreate the foo breakpoint, we should only get one location,
# the actual location.
gdb_test "break foo" "Breakpoint $decimal at \[^\r\n\]+" \
    "recreate foo breakpoint"

# Check the breakpoint was recreated correctly.
gdb_test "info breakpoints" \
    "\r\n$decimal\\s+\[^\r\n\]+ in foo\\(\\) at \[^\r\n\]+" \
    "check breakpoints after recreation"

# Continue to breakpoint in foo and confirm we stop in the expected
# place.
gdb_continue_to_breakpoint "breakpoint in foo" \
    ".*/\\* Breakpoint in foo\\.  \\*/.*"