| 1 | # Copyright 2011-2014 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. |
| 6 | # |
| 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. |
| 11 | # |
| 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/>. |
| 14 | |
| 15 | load_lib "trace-support.exp" |
| 16 | |
| 17 | standard_testfile |
| 18 | set executable $testfile |
| 19 | set expfile $testfile.exp |
| 20 | |
| 21 | # Some targets have leading underscores on assembly symbols. |
| 22 | set additional_flags [gdb_target_symbol_prefix_flags] |
| 23 | |
| 24 | if [prepare_for_testing $expfile $executable $srcfile \ |
| 25 | [list debug $additional_flags]] { |
| 26 | untested "failed to prepare for trace tests" |
| 27 | return -1 |
| 28 | } |
| 29 | |
| 30 | if ![runto_main] { |
| 31 | fail "Can't run to main to check for trace support" |
| 32 | return -1 |
| 33 | } |
| 34 | |
| 35 | if ![gdb_target_supports_trace] { |
| 36 | unsupported "target does not support trace" |
| 37 | return -1 |
| 38 | } |
| 39 | |
| 40 | set libipa [get_in_proc_agent] |
| 41 | gdb_load_shlibs $libipa |
| 42 | |
| 43 | # Can't use prepare_for_testing, because that splits compiling into |
| 44 | # building objects and then linking, and we'd fail with "linker input |
| 45 | # file unused because linking not done" when building the object. |
| 46 | |
| 47 | if { [gdb_compile "$srcdir/$subdir/$srcfile" $binfile \ |
| 48 | executable [list debug $additional_flags shlib=$libipa] ] != "" } { |
| 49 | untested "failed to compile ftrace tests" |
| 50 | return -1 |
| 51 | } |
| 52 | clean_restart ${executable} |
| 53 | |
| 54 | if ![runto_main] { |
| 55 | fail "Can't run to main for ftrace tests" |
| 56 | return 0 |
| 57 | } |
| 58 | |
| 59 | proc run_trace_experiment {} { |
| 60 | |
| 61 | gdb_test "continue" \ |
| 62 | ".*Breakpoint \[0-9\]+, begin .*" \ |
| 63 | "advance to trace begin" |
| 64 | |
| 65 | gdb_test_no_output "tstart" "start trace experiment" |
| 66 | |
| 67 | gdb_test "continue" \ |
| 68 | ".*Breakpoint \[0-9\]+, end .*" \ |
| 69 | "advance through tracing" |
| 70 | |
| 71 | gdb_test "tstatus" ".*Trace .*" "check on trace status" |
| 72 | |
| 73 | gdb_test "tstop" "" "" |
| 74 | } |
| 75 | |
| 76 | proc test_fast_tracepoints {} { |
| 77 | global gdb_prompt |
| 78 | |
| 79 | set fourgood 0 |
| 80 | |
| 81 | gdb_test "break begin" ".*" "" |
| 82 | |
| 83 | gdb_test "break end" ".*" "" |
| 84 | |
| 85 | gdb_test "print gdb_agent_gdb_trampoline_buffer_error" ".*" "" |
| 86 | |
| 87 | if { [istarget "x86_64-*-*"] || [istarget "i\[34567\]86-*-*"] } { |
| 88 | |
| 89 | gdb_test "ftrace set_point" "Fast tracepoint .*" \ |
| 90 | "fast tracepoint at a long insn" |
| 91 | |
| 92 | gdb_trace_setactions "collect at set_point: define actions" \ |
| 93 | "" \ |
| 94 | "collect globvar, anarg" "^$" |
| 95 | |
| 96 | # Make a test of shorter fast tracepoints, 32-bit x86 only |
| 97 | |
| 98 | if { [istarget "i?86-*-*"] } { |
| 99 | |
| 100 | # A Linux target needs to be able to allocate trampolines in the |
| 101 | # 16-bit range, check mmap_min_addr so we can warn testers. |
| 102 | if { [istarget "i?86-*-linux*"] } { |
| 103 | |
| 104 | set minaddr [exec sh -c "cat /proc/sys/vm/mmap_min_addr"] |
| 105 | |
| 106 | if { [expr $minaddr > 64512] } { |
| 107 | warning "mmap_min_addr > 64512, fast tracepoint will fail" |
| 108 | warning "do \"sudo sysctl -w vm.mmap_min_addr=32768\" to adjust" |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | gdb_test_multiple "ftrace four_byter" "set 4-byte fast tracepoint" { |
| 113 | -re "May not have a fast tracepoint at .*\r\n$gdb_prompt $" { |
| 114 | pass "4-byte fast tracepoint could not be set" |
| 115 | } |
| 116 | -re "Fast tracepoint .*\r\n$gdb_prompt $" { |
| 117 | pass "4-byte fast tracepoint is set" |
| 118 | set fourgood 1 |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | if { $fourgood } { |
| 123 | |
| 124 | gdb_trace_setactions "collect at four_byter: define actions" \ |
| 125 | "" \ |
| 126 | "collect globvar, anarg" "^$" |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | run_trace_experiment |
| 131 | |
| 132 | gdb_test "tfind pc *set_point" "Found trace frame .*" \ |
| 133 | "tfind set_point frame, first time" |
| 134 | |
| 135 | setup_kfail "gdb/13808" "x86_64-*-linux*" |
| 136 | gdb_test "print globvar" " = 1" |
| 137 | |
| 138 | gdb_test "tfind pc *set_point" "Found trace frame .*" \ |
| 139 | "tfind set_point frame, second time" |
| 140 | |
| 141 | setup_kfail "gdb/13808" "x86_64-*-linux*" |
| 142 | gdb_test "print anarg" " = 200" |
| 143 | |
| 144 | gdb_test "tfind start" "Found trace frame .*" \ |
| 145 | "reset tfinding" |
| 146 | |
| 147 | if { $fourgood } { |
| 148 | |
| 149 | gdb_test "tfind pc *four_byter" "Found trace frame .*" \ |
| 150 | "tfind four_byter frame, first time" |
| 151 | |
| 152 | gdb_test "print anarg" " = 101" \ |
| 153 | "look at collected local, first time" |
| 154 | |
| 155 | gdb_test "tfind pc *four_byter" "Found trace frame .*" \ |
| 156 | "tfind four_byter frame, second time" |
| 157 | |
| 158 | gdb_test "print anarg" " = 201" \ |
| 159 | "look at collected local, second time" |
| 160 | |
| 161 | } |
| 162 | |
| 163 | # If debugging with the remote target, try force disabling the |
| 164 | # fast tracepoints RSP feature, and confirm fast tracepoints |
| 165 | # can no longer be downloaded. |
| 166 | set test "fast tracepoint could not be downloaded with the feature disabled" |
| 167 | if [gdb_is_target_remote] { |
| 168 | gdb_test "set remote fast-tracepoints-packet off" |
| 169 | |
| 170 | gdb_test_multiple "tstart" $test { |
| 171 | -re "warning: Target does not support fast tracepoints, downloading .* as regular tracepoint.*\r\n$gdb_prompt $" { |
| 172 | pass $test |
| 173 | } |
| 174 | } |
| 175 | } else { |
| 176 | unsupported $test |
| 177 | } |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | gdb_reinitialize_dir $srcdir/$subdir |
| 182 | |
| 183 | if { [gdb_test "info sharedlibrary" ".*${libipa}.*" "IPA loaded"] != 0 } { |
| 184 | untested "Could not find IPA lib loaded" |
| 185 | return 1 |
| 186 | } |
| 187 | |
| 188 | test_fast_tracepoints |