147 lines
4.2 KiB
Plaintext
147 lines
4.2 KiB
Plaintext
# Copyright 1998-2018 Free Software Foundation, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# This test helps making sure QTro support doesn't regress. If the
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# stub supports the newer qXfer:traceframe-info:read, then the QTro
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# paths in the stub are never exercised. PR remote/15455 is an
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# example of a regression that unfortunately went unnoticed for long.
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load_lib trace-support.exp
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standard_testfile
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if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
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return -1
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}
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clean_restart $testfile
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if ![runto_main] {
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fail "can't run to main to check for trace support"
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return -1
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}
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# Check whether we're testing with the remote or extended-remote
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# targets, and whether the target supports tracepoints.
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if ![gdb_is_target_remote] {
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return -1
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}
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if ![gdb_target_supports_trace] {
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unsupported "current target does not support trace"
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return -1
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}
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# Run a trace session, stop it, and then inspect the resulting trace
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# frame (IOW, returns while tfind mode is active).
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proc prepare_for_trace_disassembly { } {
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global gdb_prompt
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gdb_breakpoint "end"
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gdb_test "trace subr" "Tracepoint .*" \
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"tracepoint at subr"
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gdb_trace_setactions "define action" \
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"" \
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"collect parm" "^$"
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gdb_test_no_output "tstart"
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gdb_test "continue" ".*Breakpoint \[0-9\]+, end .*" \
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"advance through tracing"
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gdb_test "tstatus" ".*Collected 1 trace frame.*" \
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"collected 1 trace frame"
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gdb_test_no_output "tstop"
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gdb_tfind_test "tfind start" "start" "0"
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}
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clean_restart $testfile
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runto_main
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# Trace once, issuing a tstatus, so that GDB tries
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# qXfer:trace-frame-info:read.
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prepare_for_trace_disassembly
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# Now check whether the packet is supported.
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set traceframe_info_supported -1
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set test "probe for traceframe-info support"
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gdb_test_multiple "show remote traceframe-info-packet" $test {
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-re ".*Support for .* is auto-detected, currently (\[a-z\]*).*$gdb_prompt $" {
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set status $expect_out(1,string)
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if { $status == "enabled" } {
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set traceframe_info_supported 1
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} else {
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set traceframe_info_supported 0
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}
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pass $test
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}
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}
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if { $traceframe_info_supported == -1 } {
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return -1
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}
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# Check whether we're testing with our own GDBserver.
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set is_gdbserver [target_is_gdbserver]
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if { $is_gdbserver == -1 } {
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return -1
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}
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# Now disassemble (IOW, read from read-only memory) while inspecting a
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# trace frame, twice. Once with qXfer:traceframe-info:read left to
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# auto, and once with it disabled, exercising the QTro fallback path
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# in the stub side.
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foreach tfinfo { auto off } {
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with_test_prefix "qXfer:traceframe-info:read $tfinfo" {
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clean_restart $testfile
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runto_main
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gdb_test_no_output "set remote traceframe-info-packet $tfinfo"
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prepare_for_trace_disassembly
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set test "trace disassembly"
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gdb_test_multiple "disassemble subr" $test {
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-re "<(\.\[0-9\]+|)>:.*End of assembler dump.*$gdb_prompt $" {
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pass $test
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}
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-re "Cannot access memory.*$gdb_prompt $" {
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if { $traceframe_info_supported == 0 } {
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# If qXfer:traceframe-info:read is not supported,
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# then there should be QTro support.
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fail $test
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} elseif { $tfinfo == off && $is_gdbserver == 1 } {
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# We we're testing with GDBserver, we know both
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# qXfer:traceframe-info:read and QTro are
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# supported (although supporting the former only
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# would be sufficient), so issue a FAIL instead of
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# UNSUPPORTED, giving us better visibility of QTro
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# regressions.
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fail $test
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} else {
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# Otherwise, qXfer:traceframe-info:read is
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# supported, making QTro optional, so this isn't
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# really a failure.
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unsupported "$test (no QTro support)"
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}
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}
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}
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}
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}
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