1# Copyright 2008-2023 Free Software Foundation, Inc. 2 3# This program is free software; you can redistribute it and/or modify 4# it under the terms of the GNU General Public License as published by 5# the Free Software Foundation; either version 3 of the License, or 6# (at your option) any later version. 7# 8# This program is distributed in the hope that it will be useful, 9# but WITHOUT ANY WARRANTY; without even the implied warranty of 10# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11# GNU General Public License for more details. 12# 13# You should have received a copy of the GNU General Public License 14# along with this program. If not, see <http://www.gnu.org/licenses/>. 15 16# This file is part of the GDB testsuite. 17# 18# 'reverse-finish' used to have a bug where user breakpoints set at 19# the functions entry would be ignored. Make sure the bug doesn't 20# reappear. 21 22# The test sets a breakpoint with the command break *void_func to set a 23# breakpoint on the first instruction of the function. The issue is on 24# PowerPC it uses Global Entry Points (GEP) and Local Entry Points (LEP). 25# The GEP is the first instruction in the function. It sets up register 26# r2 and then reaches the LEP. 27# 28# <void_func>: 29# lis r2,4098 <- GEP 30# addi r2,r2,32512 31# mflr r0 <- LEP 32# std r0,16(r1) 33# .... 34 35# 36# The command break *void_func sets the breakpoint on the GEP. Calling 37# the function with void_func() will enter the function via the LEP. So, 38# this test needs to use a function pointer to call void_func() so the 39# function will be entered via the GEP to work as designed on PowerPC in 40# addition to non-PowerPC systems. On non-PowerPC systems, the GEP and LEP 41# are the same. 42 43if ![supports_reverse] { 44 return 45} 46 47standard_testfile 48 49if { [prepare_for_testing "failed to prepare" "$testfile" $srcfile] } { 50 return -1 51} 52 53if {![runto_main]} { 54 return 0 55} 56 57if [supports_process_record] { 58 # Activate process record/replay 59 gdb_test_no_output "record" "turn on process record" 60} 61 62# Start the test. 63set breakloc [gdb_get_line_number "VOID FUNC" "$srcfile"] 64gdb_test "tbreak void_func" \ 65 "Temporary breakpoint $decimal at .*$srcfile, line $breakloc\." \ 66 "set breakpoint on void_func" 67gdb_continue_to_breakpoint "void_func" ".*$srcfile:$breakloc.*" 68 69# We stop at the brekapoint on void_func, but breakpoint on 70# *void_func will be set at the same place if function void_func doesn't 71# have prologue. One step forward to avoid this. 72gdb_test "si" 73 74gdb_test "break \*void_func" \ 75 "Breakpoint $decimal at .*" \ 76 "set breakpoint at void_func's entry" 77 78gdb_test "reverse-finish" \ 79 ".*Breakpoint .*, void_func.*" \ 80 "reverse-finish from void_func trips breakpoint at entry" 81 82gdb_test "frame" "#0 void_func.*" "no spurious proceed after breakpoint stop" 83