gdb/testsuite/gdb.threads/dlopen-libpthread.exp

# Copyright 2011-2023 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/>.

if {![isnative] || ![istarget *-linux*] || [skip_shlib_tests]} {
    return 0
}

load_lib prelink-support.exp

set testfile "dlopen-libpthread"
set srcmainfile ${testfile}.c
set srclibfile ${testfile}-lib.c
set executable ${testfile}
set binfile_lib [standard_output_file ${executable}.so]
set lib_dlopen [shlib_target_file ${executable}.so]

# Use build_executable_own_libs as prelinked libpthread.so can produce false
# PASS - it is OK if GDB processes it still before relocation.

set relink_args [build_executable_own_libs ${testfile}.exp ${executable}.so $srclibfile {debug shlib_pthreads} no]
if {$relink_args == "" || ![prelink_no $relink_args]
    || [prepare_for_testing "failed to prepare" ${executable} ${srcmainfile} {debug shlib_load}] } {
    return -1
}
gdb_load_shlib $binfile_lib

if { ![runto_main] } {
    return -1
}

set probe_names {}
# Fedora 17 name.  There's specific code in
# svr4_find_and_create_probe_breakpoints to deal with this.
lappend probe_names rtld_map_complete
# Upstream name.
lappend probe_names map_complete

set have_probe 0
foreach probe_name $probe_names {
    set cmd "info probes all rtld ^$probe_name$"
    gdb_test_multiple $cmd "" {
	-re -wrap "\[ \t\]$probe_name\[ \t\]+0x\[0-9a-f\]+.*" {
	    set have_probe 1
	}
	-re -wrap "No probes matched\\." {
	}
    }
}

if { !$have_probe } {
    untested "no matching probes"
    return -1
}

# We link the exec without -lpthread, but libpthread.so may already be loaded at main
# due to LD_PRELOAD.
set libpthread_maybe_preloaded 0
set binfile [standard_output_file $executable]
if { [has_dependency $binfile /libpthread\\.so] == 1 } {
    set libpthread_maybe_preloaded 1
}

# We link the shlib with -lpthread, but since glibc 2.34 libpthread has been
# merged with libc, so libpthread.so may not be a dependency.
set libpthread_missing 0
if { [has_dependency $binfile_lib /libpthread\\.so] == 0 } {
    set libpthread_missing 1
}

set test "libpthread.so not found"
gdb_test_multiple "info sharedlibrary" $test {
    -re "/libpthread\\.so.*\r\n$gdb_prompt $" {
	if { $libpthread_maybe_preloaded } {
	    unsupported $test
	} else {
	    fail $test
	}
    }
    -re "/libc\\.so.*\r\n$gdb_prompt $" {
	pass $test
    }
}

gdb_test "set variable filename=\"$lib_dlopen\""

gdb_breakpoint "notify"

# The error was:
# Cannot find new threads: generic error
gdb_continue_to_breakpoint "notify" ".* notify-here .*"

if { !$libpthread_missing } {
    gdb_test "info sharedlibrary" {/libpthread\.so.*} "libpthread.so found"
}