gdb/testsuite/gdb.base/condbreak.exp

# Copyright 1997-2018 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/>.

# This test was written by Rich Title. 
# Purpose is to test conditional breakpoints.
# Modeled after "break.exp".

#
# test running programs
#

standard_testfile break.c break1.c

if {[prepare_for_testing "failed to prepare" $testfile [list $srcfile $srcfile2] \
	 {debug nowarnings}]} {
    return -1
}

if [get_compiler_info] {
    return -1
}

clean_restart ${binfile}


set bp_location1  [gdb_get_line_number "set breakpoint 1 here"]
set bp_location6  [gdb_get_line_number "set breakpoint 6 here"]
set bp_location8  [gdb_get_line_number "set breakpoint 8 here" $srcfile2]
set bp_location14 [gdb_get_line_number "set breakpoint 14 here" $srcfile2]
set bp_location15 [gdb_get_line_number "set breakpoint 15 here" $srcfile2]
set bp_location17 [gdb_get_line_number "set breakpoint 17 here" $srcfile2]

#
# test break at function
#
gdb_test "break main" \
    "Breakpoint.*at.* file .*$srcfile, line.*" \
    "breakpoint function"

# 
# test conditional break at function
#
gdb_test "break marker1 if 1==1" \
    "Breakpoint.*at.* file .*$srcfile2, line.*"

gdb_test_no_output "delete 2"

#
# test conditional break at line number
#
gdb_test "break $srcfile:$bp_location1 if 1==1" \
    "Breakpoint.*at.* file .*$srcfile, line $bp_location1\\."

gdb_test_no_output "delete 3"

# 
# test conditional break at function
#
gdb_test "break marker1 if (1==1)" \
    "Breakpoint.*at.* file .*$srcfile2, line.*"

#
# test conditional break at line number
#
gdb_test "break $srcfile:$bp_location1 if (1==1)" \
    "Breakpoint.*at.* file .*$srcfile, line $bp_location1\\."

gdb_test "break marker2 if (a==43)" \
    "Breakpoint.*at.* file .*$srcfile2, line.*"

#
# Check break involving inferior function call.
# Ensure there is at least one additional breakpoint with higher VMA.
#
gdb_test "break marker3 if (multi_line_if_conditional(1,1,1)==0)" \
    "Breakpoint.*at.* file .*$srcfile2, line.*"
gdb_test "break marker4" \
    "Breakpoint.*at.* file .*$srcfile2, line.*"

#
# check to see what breakpoints are set
#
gdb_test "info break" \
    "Num     Type\[ \]+Disp Enb Address\[ \]+What.*
\[0-9\]+\[\t \]+breakpoint     keep y.* in main at .*$srcfile:$bp_location6.*
\[0-9\]+\[\t \]+breakpoint     keep y.* in marker1 at .*$srcfile2:$bp_location15.*
\[\t \]+stop only if \\(1==1\\).*
\[0-9\]+\[\t \]+breakpoint     keep y.* in main at .*$srcfile:$bp_location1.*
\[\t \]+stop only if \\(1==1\\).*
\[0-9\]+\[\t \]+breakpoint     keep y.* in marker2 at .*$srcfile2:$bp_location8.*
\[\t \]+stop only if \\(a==43\\).*
\[0-9\]+\[\t \]+breakpoint     keep y.* in marker3 at .*$srcfile2:$bp_location17.*
\[\t \]+stop only if \\(multi_line_if_conditional\\(1,1,1\\)==0\\).*
\[0-9\]+\[\t \]+breakpoint     keep y.* in marker4 at .*$srcfile2:$bp_location14.*" \
    "breakpoint info"


#
# run until the breakpoint at main is hit.
#


rerun_to_main

#
# run until the breakpoint at a line number
#
gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, main \\(argc=.*, argv=.*, envp=.*\\) at .*$srcfile:$bp_location1.*$bp_location1\[\t \]+printf.*factorial.*" \
			"run until breakpoint set at a line number"

#
# run until the breakpoint at marker1
#
# If the inferior stops at the first instruction of a source line, GDB
# won't print the actual PC value; the source line is enough to
# exactly specify the PC.  But if the inferior is instead stopped in
# the midst of a source line, GDB will include the PC in the
# breakpoint hit message.  This way, GDB always provides the exact
# stop location, but avoids clutter when possible.
#
# Suppose you have a function written completely on one source line, like:
#    int foo (int x) { return 0; }
# Setting a breakpoint at `foo' actually places the breakpoint after
# foo's prologue.
#
# GCC's STABS writer always emits a line entry attributing the
# prologue instructions to the line containing the function's open
# brace, even if the first user instruction is also on that line.
# This means that, in the case of a one-line function, you will get
# two line entries in the debug info for the same line: one at the
# function's entry point, and another at the first user instruction.
# GDB preserves these duplicated line entries, and prefers the later
# one; thus, when the program stops after the prologue, at the first
# user instruction, GDB's search finds the second line entry, decides
# that the PC is indeed at the beginning of a source line, and doesn't
# print an address in the breakpoint hit message.
# 
# GCC's Dwarf2 writer, on the other hand, squeezes out duplicate line
# entries, so GDB considers the source line to begin at the start of
# the function's prologue.  Thus, if the program stops at the
# breakpoint, GDB will decide that the PC is not at the beginning of a
# source line, and will print an address.
#
# I think the Dwarf2 writer's behavior is arguably correct, but not
# helpful.  If the user sets a breakpoint at that source line, they
# want that breakpoint to fall after the prologue.  Identifying the
# prologue's code with the opening brace is nice, but it shouldn't
# take precedence over real code.
#
# Until the Dwarf2 writer gets fixed, I'm going to XFAIL its behavior.
gdb_test_multiple "continue" "run until breakpoint at marker1" {
    -re  "Continuing\\..*Breakpoint \[0-9\]+, marker1 \\(\\) at .*$srcfile2:$bp_location15.*$bp_location15\[\t \]+.*$gdb_prompt $" {
	pass "run until breakpoint at marker1"
    }
    -re  "Continuing\\..*Breakpoint \[0-9\]+, $hex in marker1 \\(\\) at .*$srcfile2:$bp_location15.*$bp_location15\[\t \]+.*$gdb_prompt $" {
	xfail "run until breakpoint at marker1"
    }
}

# run until the breakpoint at marker2
# Same issues here as above.
setup_xfail hppa2.0w-*-* 11512CLLbs
gdb_test_multiple "continue" "run until breakpoint at marker2" {
    -re "Continuing\\..*Breakpoint \[0-9\]+, marker2 \\(a=43\\) at .*$srcfile2:$bp_location8.*$bp_location8\[\t \]+.*$gdb_prompt $" {
	pass "run until breakpoint at marker2"
    }
    -re "Continuing\\..*Breakpoint \[0-9\]+, $hex in marker2 \\(a=43\\) at .*$srcfile2:$bp_location8.*$bp_location8\[\t \]+.*$gdb_prompt $" {
	xfail "run until breakpoint at marker2"
    }
}

# Test combinations of conditional and thread-specific breakpoints.
gdb_test "break main if (1==1) thread 999" \
    "Unknown thread 999\\."
gdb_test "break main thread 999 if (1==1)" \
    "Unknown thread 999\\."

# Verify that both if and thread can be distinguished from a breakpoint
# address expression.
gdb_test "break *main if (1==1) thread 999" \
    "Unknown thread 999\\."
gdb_test "break *main thread 999 if (1==1)" \
    "Unknown thread 999\\."

# Similarly for task.
gdb_test "break *main if (1==1) task 999" \
    "Unknown task 999\\."
gdb_test "break *main task 999 if (1==1)" \
    "Unknown task 999\\."

# GDB accepts abbreviations for "thread" and "task".
gdb_test "break *main if (1==1) t 999" \
    "Unknown thread 999\\."
gdb_test "break *main if (1==1) th 999" \
    "Unknown thread 999\\."
gdb_test "break *main if (1==1) ta 999" \
    "Unknown task 999\\."

set test "run until breakpoint at marker3"
gdb_test_multiple "continue" $test {
    -re "Continuing\\..*Breakpoint \[0-9\]+, marker3 \\(a=$hex \"stack\", b=$hex \"trace\"\\) at .*$srcfile2:$bp_location17.*$bp_location17\[\t \]+.*$gdb_prompt $" {
	pass $test
    }
    -re "Continuing\\..*Breakpoint \[0-9\]+, $hex in marker3 \\(a=$hex \"stack\", b=$hex \"trace\"\\) at .*$srcfile2:$bp_location17.*$bp_location17\[\t \]+.*$gdb_prompt $" {
	xfail $test
    }
}

set test "run until breakpoint at marker4"
gdb_test_multiple "continue" $test {
    -re "Continuing\\..*Breakpoint \[0-9\]+, marker4 \\(d=177601976\\) at .*$srcfile2:$bp_location14.*$bp_location14\[\t \]+.*$gdb_prompt $" {
	pass $test
    }
    -re "Continuing\\..*Breakpoint \[0-9\]+, $hex in marker4 \\(d=177601976\\) at .*$srcfile2:$bp_location14.*$bp_location14\[\t \]+.*$gdb_prompt $" {
	xfail $test
    }
}

gdb_test "complete cond 1" "cond 1"
gdb_test "set variable \$var = 1"
gdb_test "complete cond \$v" "cond \\\$var"
gdb_test "complete cond 1 values\[0\].a" "cond 1 values.0..a_field"