| # Copyright 2011-2022 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/>. |
| |
| load_lib "trace-support.exp" |
| |
| if {[skip_shlib_tests]} { |
| return 0 |
| } |
| |
| standard_testfile |
| set executable $testfile |
| set expfile $testfile.exp |
| |
| # Some targets have leading underscores on assembly symbols. |
| set additional_flags [gdb_target_symbol_prefix_flags] |
| |
| if ![gdb_trace_common_supports_arch] { |
| unsupported "no trace-common.h support for arch" |
| return -1 |
| } |
| |
| if [prepare_for_testing "failed to prepare" $executable $srcfile \ |
| [list debug $additional_flags]] { |
| return -1 |
| } |
| |
| if ![runto_main] { |
| return -1 |
| } |
| |
| if ![gdb_target_supports_trace] { |
| unsupported "target does not support trace" |
| return -1 |
| } |
| |
| set libipa [get_in_proc_agent] |
| set remote_libipa [gdb_load_shlib $libipa] |
| |
| # Can't use prepare_for_testing, because that splits compiling into |
| # building objects and then linking, and we'd fail with "linker input |
| # file unused because linking not done" when building the object. |
| |
| if { [gdb_compile "$srcdir/$subdir/$srcfile" $binfile \ |
| executable [list debug nopie $additional_flags shlib=$libipa] ] != "" } { |
| untested "failed to compile" |
| return -1 |
| } |
| clean_restart ${executable} |
| |
| if ![runto_main] { |
| return 0 |
| } |
| |
| proc run_trace_experiment {} { |
| |
| gdb_test "continue" \ |
| ".*Breakpoint \[0-9\]+, begin .*" \ |
| "advance to trace begin" |
| |
| gdb_test_no_output "tstart" "start trace experiment" |
| |
| # Fast tracepoint can be set in signal handler, so gdb_collect in |
| # IPA shouldn't call any non-async-signal-safe functions. It is |
| # impractical to list all non-async-signal-safe functions, and set |
| # breakpoints on them, so choose malloc only in this test. |
| gdb_test "b -q malloc" |
| |
| # Performance-wise, gdb_collect in IPA shouldn't call any syscall |
| # in order to keep fast tracepoint fast enough. |
| global gdb_prompt |
| set test "catch syscall" |
| gdb_test_multiple $test $test { |
| -re "The feature \'catch syscall\' is not supported.*\r\n$gdb_prompt $" { |
| } |
| -re ".*$gdb_prompt $" { |
| pass $test |
| } |
| } |
| |
| global decimal |
| set test "advance through tracing" |
| gdb_test_multiple "continue" $test { |
| -re "Thread 2 .* hit Catchpoint $decimal \\(call to syscall .*\\).*\r\n$gdb_prompt $" { |
| # IPA starts a helper thread, which calls accept. Ignore it. |
| send_gdb "continue\n" |
| exp_continue |
| } |
| -re "Breakpoint $decimal, end .*$gdb_prompt $" { |
| pass $test |
| } |
| } |
| |
| gdb_test "tstatus" ".*Trace .*" "check on trace status" |
| |
| gdb_test "tstop" "" "" |
| } |
| |
| proc test_fast_tracepoints {} { |
| global gdb_prompt |
| |
| set fourgood 0 |
| |
| gdb_breakpoint "begin" qualified |
| |
| gdb_breakpoint "end" qualified |
| |
| gdb_test "print gdb_agent_gdb_trampoline_buffer_error" ".*" "" |
| |
| gdb_test "ftrace set_point" "Fast tracepoint .*" \ |
| "fast tracepoint at a long insn" |
| |
| gdb_trace_setactions "collect at set_point: define actions" \ |
| "" \ |
| "collect globvar, anarg" "^$" |
| |
| # Make a test of shorter fast tracepoints, 32-bit x86 only |
| |
| if { [istarget "i?86-*-*"] } { |
| |
| # A Linux target needs to be able to allocate trampolines in the |
| # 16-bit range, check mmap_min_addr so we can warn testers. |
| if { [istarget "i?86-*-linux*"] } { |
| |
| set minaddr [exec sh -c "cat /proc/sys/vm/mmap_min_addr"] |
| |
| if { [expr $minaddr > 64512] } { |
| warning "mmap_min_addr > 64512, fast tracepoint will fail" |
| warning "do \"sudo sysctl -w vm.mmap_min_addr=32768\" to adjust" |
| } |
| } |
| |
| gdb_test_multiple "ftrace four_byter" "set 4-byte fast tracepoint" { |
| -re "May not have a fast tracepoint at .*\r\n$gdb_prompt $" { |
| pass "4-byte fast tracepoint could not be set" |
| } |
| -re "Fast tracepoint .*\r\n$gdb_prompt $" { |
| pass "4-byte fast tracepoint is set" |
| set fourgood 1 |
| } |
| } |
| |
| if { $fourgood } { |
| |
| gdb_trace_setactions "collect at four_byter: define actions" \ |
| "" \ |
| "collect globvar, anarg" "^$" |
| } |
| } |
| |
| run_trace_experiment |
| |
| gdb_test "tfind pc *set_point" "Found trace frame .*" \ |
| "tfind set_point frame, first time" |
| |
| gdb_test "print globvar" " = 1" |
| |
| gdb_test "tfind pc *set_point" "Found trace frame .*" \ |
| "tfind set_point frame, second time" |
| |
| setup_kfail "gdb/13808" "x86_64-*-linux*" |
| gdb_test "print anarg" " = 200" |
| |
| gdb_test "tfind start" "Found trace frame .*" \ |
| "reset tfinding" |
| |
| if { $fourgood } { |
| |
| gdb_test "tfind pc *four_byter" "Found trace frame .*" \ |
| "tfind four_byter frame, first time" |
| |
| gdb_test "print anarg" " = 101" \ |
| "look at collected local, first time" |
| |
| gdb_test "tfind pc *four_byter" "Found trace frame .*" \ |
| "tfind four_byter frame, second time" |
| |
| gdb_test "print anarg" " = 201" \ |
| "look at collected local, second time" |
| |
| } |
| |
| # If debugging with the remote target, try force disabling the |
| # fast tracepoints RSP feature, and confirm fast tracepoints |
| # can no longer be downloaded. |
| set test "fast tracepoint could not be downloaded with the feature disabled" |
| if [gdb_is_target_remote] { |
| gdb_test "set remote fast-tracepoints-packet off" |
| |
| gdb_test_multiple "tstart" $test { |
| -re "warning: Target does not support fast tracepoints, downloading .* as regular tracepoint.*\r\n$gdb_prompt $" { |
| pass $test |
| } |
| } |
| } else { |
| unsupported $test |
| } |
| } |
| |
| gdb_reinitialize_dir $srcdir/$subdir |
| |
| if { [gdb_test "info sharedlibrary" ".*${remote_libipa}.*" "IPA loaded"] != 0 } { |
| untested "could not find IPA lib loaded" |
| return 1 |
| } |
| |
| test_fast_tracepoints |