gdb/testsuite/gdb.opt/inline-small-func.exp

# 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/>.

# Check for an issue in GDB where buildsym_compunit::record_line was
# removing duplicate line table entries, but skip_prologue_using_sal
# depends on these duplicates to spot the end of the prologue.
#
# When the de-duplication was added this regression was not spotted as
# it requires a particular combination of a (very) small function
# being inlined into an also very small outer function.
#
# See also gdb.dwarf/dw2-inline-small-func.exp for a version of this
# test that makes use of the Dejagnu DWARF compiler.
#
# This test simply compiles with optimization and checks that GDB can
# do something suitable with the compiled binary.  Problems with this
# test are most likely to occur when GDB asks the target specific code
# to skip the prologue (gdbarch_skip_prologue).  Some targets make use
# of skip_prologue_using_sal, which should be fine, however, some
# targets make a poor attempt to duplicate parts of
# skip_prologue_using_sal, these targets could easily fail this test.
# This is not (necessarily) a problem with this test, but could
# indicate a weakness with the target in question.

standard_testfile inline-small-func.c inline-small-func.h

if { [prepare_for_testing "failed to prepare" ${testfile} \
	  [list $srcfile] {debug optimize=-O1}] } {
    return -1
}

if ![runto_main] {
    return -1
}

# Delete all breakpoints so that the output of "info breakpoints"
# below will only contain a single breakpoint.
delete_breakpoints

# Place a breakpoint within the function in the header file.
set linenum [gdb_get_line_number "callee: body" $srcfile2]
gdb_breakpoint "${srcfile2}:${linenum}"

# Check that the breakpoint was placed where we expected.  It should
# appear at the requested line.  When the bug in GDB was present the
# breakpoint would be placed on one of the following lines instead.
gdb_test "info breakpoints" \
    ".* in callee at \[^\r\n\]+${srcfile2}:${linenum}\\y.*"