1 # Copyright 2011-2018 Free Software Foundation, Inc.
2 # This program is free software; you can redistribute it and/or modify
3 # it under the terms of the GNU General Public License as published by
4 # the Free Software Foundation; either version 3 of the License, or
5 # (at your option) any later version.
7 # This program is distributed in the hope that it will be useful,
8 # but WITHOUT ANY WARRANTY; without even the implied warranty of
9 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 # GNU General Public License for more details.
12 # You should have received a copy of the GNU General Public License
13 # along with this program. If not, see <http://www.gnu.org/licenses/>.
15 load_lib "trace-support.exp"
18 set executable $testfile
19 set expfile $testfile.exp
21 # Some targets have leading underscores on assembly symbols.
22 set additional_flags [gdb_target_symbol_prefix_flags]
24 if [prepare_for_testing "failed to prepare" $executable $srcfile \
25 [list debug $additional_flags]] {
30 fail "can't run to main to check for trace support"
34 if ![gdb_target_supports_trace] {
35 unsupported "target does not support trace"
39 set libipa [get_in_proc_agent]
40 set remote_libipa [gdb_load_shlib $libipa]
42 # Can't use prepare_for_testing, because that splits compiling into
43 # building objects and then linking, and we'd fail with "linker input
44 # file unused because linking not done" when building the object.
46 if { [gdb_compile "$srcdir/$subdir/$srcfile" $binfile \
47 executable [list debug $additional_flags shlib=$libipa] ] != "" } {
48 untested "failed to compile"
51 clean_restart ${executable}
54 fail "can't run to main for ftrace tests"
58 proc run_trace_experiment {} {
61 ".*Breakpoint \[0-9\]+, begin .*" \
62 "advance to trace begin"
64 gdb_test_no_output "tstart" "start trace experiment"
66 # Fast tracepoint can be set in signal handler, so gdb_collect in
67 # IPA shouldn't call any non-async-signal-safe functions. It is
68 # impractical to list all non-async-signal-safe functions, and set
69 # breakpoints on them, so choose malloc only in this test.
70 gdb_test "b -q malloc"
72 # Performance-wise, gdb_collect in IPA shouldn't call any syscall
73 # in order to keep fast tracepoint fast enough.
75 set test "catch syscall"
76 gdb_test_multiple $test $test {
77 -re "The feature \'catch syscall\' is not supported.*\r\n$gdb_prompt $" {
79 -re ".*$gdb_prompt $" {
85 set test "advance through tracing"
86 gdb_test_multiple "continue" $test {
87 -re "Thread 2 .* hit Catchpoint $decimal \\(call to syscall .*\\).*\r\n$gdb_prompt $" {
88 # IPA starts a helper thread, which calls accept. Ignore it.
92 -re "Breakpoint $decimal, end .*$gdb_prompt $" {
97 gdb_test "tstatus" ".*Trace .*" "check on trace status"
99 gdb_test "tstop" "" ""
102 proc test_fast_tracepoints {} {
107 gdb_breakpoint "begin" qualified
109 gdb_breakpoint "end" qualified
111 gdb_test "print gdb_agent_gdb_trampoline_buffer_error" ".*" ""
113 gdb_test "ftrace set_point" "Fast tracepoint .*" \
114 "fast tracepoint at a long insn"
116 gdb_trace_setactions "collect at set_point: define actions" \
118 "collect globvar, anarg" "^$"
120 # Make a test of shorter fast tracepoints, 32-bit x86 only
122 if { [istarget "i?86-*-*"] } {
124 # A Linux target needs to be able to allocate trampolines in the
125 # 16-bit range, check mmap_min_addr so we can warn testers.
126 if { [istarget "i?86-*-linux*"] } {
128 set minaddr [exec sh -c "cat /proc/sys/vm/mmap_min_addr"]
130 if { [expr $minaddr > 64512] } {
131 warning "mmap_min_addr > 64512, fast tracepoint will fail"
132 warning "do \"sudo sysctl -w vm.mmap_min_addr=32768\" to adjust"
136 gdb_test_multiple "ftrace four_byter" "set 4-byte fast tracepoint" {
137 -re "May not have a fast tracepoint at .*\r\n$gdb_prompt $" {
138 pass "4-byte fast tracepoint could not be set"
140 -re "Fast tracepoint .*\r\n$gdb_prompt $" {
141 pass "4-byte fast tracepoint is set"
148 gdb_trace_setactions "collect at four_byter: define actions" \
150 "collect globvar, anarg" "^$"
156 gdb_test "tfind pc *set_point" "Found trace frame .*" \
157 "tfind set_point frame, first time"
159 gdb_test "print globvar" " = 1"
161 gdb_test "tfind pc *set_point" "Found trace frame .*" \
162 "tfind set_point frame, second time"
164 setup_kfail "gdb/13808" "x86_64-*-linux*"
165 gdb_test "print anarg" " = 200"
167 gdb_test "tfind start" "Found trace frame .*" \
172 gdb_test "tfind pc *four_byter" "Found trace frame .*" \
173 "tfind four_byter frame, first time"
175 gdb_test "print anarg" " = 101" \
176 "look at collected local, first time"
178 gdb_test "tfind pc *four_byter" "Found trace frame .*" \
179 "tfind four_byter frame, second time"
181 gdb_test "print anarg" " = 201" \
182 "look at collected local, second time"
186 # If debugging with the remote target, try force disabling the
187 # fast tracepoints RSP feature, and confirm fast tracepoints
188 # can no longer be downloaded.
189 set test "fast tracepoint could not be downloaded with the feature disabled"
190 if [gdb_is_target_remote] {
191 gdb_test "set remote fast-tracepoints-packet off"
193 gdb_test_multiple "tstart" $test {
194 -re "warning: Target does not support fast tracepoints, downloading .* as regular tracepoint.*\r\n$gdb_prompt $" {
203 gdb_reinitialize_dir $srcdir/$subdir
205 if { [gdb_test "info sharedlibrary" ".*${remote_libipa}.*" "IPA loaded"] != 0 } {
206 untested "could not find IPA lib loaded"
210 test_fast_tracepoints