binutils-gdb/gdb/testsuite/gdb.base/find-unmapped.exp

# Copyright 2012-2017 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/>.

standard_testfile

if { [prepare_for_testing "failed to prepare" ${testfile}] } {
    return -1
}

if ![runto breakpt] {
    return -1
}

# Basic attempt to read memory from globals.
gdb_test "x/5w global_var_1" \
    "$hex:\[ \t\]+0\[ \t\]+0\[ \t\]+0\[ \t\]+0\r\n$hex:\[ \t\]+Cannot access memory at address $hex"
gdb_test "x/5w global_var_2" \
    "$hex:\[ \t\]+Cannot access memory at address $hex"


# Try a find starting from each global, expecting the search to fail
# due to memory access failure.
#
# If EXPECT_WARNING is true, then expect the "Unable to access
# ... halting search" warning before the "Pattern not found" output.
# Otherwise, don't expect the warning.
#
# (EXPECT_WARNING is necessary because when testing with the RSP
# against servers that support the remote search memory packet, GDB
# does not print that "halting search" warning.  While there are
# servers that do print the same warning message as GDB would if it
# were in charge of the search (like GDBserver), we're only parsing
# GDB's output here, not the server's output.  And while we could read
# GDBserver's output from $inferior_spawn_id, having GDBserver print
# the warnings on its terminal doesn't really help users.  Much better
# would be to extend the remote protocol to let the server tell GDB
# which memory range couldn't be accessed, and then let GDB print the
# warning instead of the server.  See PR gdb/22293.)

proc test_not_found {expect_warning} {
    global decimal hex

    if {$expect_warning} {
	set halting_search_re \
	    "warning: Unable to access $decimal bytes of target memory at $hex, halting search\.\r\n"
    } else {
	set halting_search_re ""
    }

    # Now try a find starting from each global.
    gdb_test "find global_var_0, global_var_2, 0xff" \
	"${halting_search_re}Pattern not found."

    gdb_test "find global_var_1, global_var_2, 0xff" \
	"${halting_search_re}Pattern not found."

    gdb_test "find global_var_2, (global_var_2 + 16), 0xff" \
	"${halting_search_re}Pattern not found."
}

# If testing with the RSP, also test with target-side search
# acceleration disabled.  This serves as proxy for servers that don't
# support the memory search packet, when testing with GDBserver.

if {[target_info gdb_protocol] == "remote"
    || [target_info gdb_protocol] == "extended-remote"} {
    test_not_found 0
    with_test_prefix "search-memory-packet off" {
	gdb_test_no_output "set remote search-memory-packet off"
	test_not_found 0
    }
} else {
    test_not_found 1
}