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# Copyright 1998, 2007-2012 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"
set testfile "circ"
set srcfile ${testfile}.c
set binfile $objdir/$subdir/$testfile
if { [gdb_compile "$srcdir/$subdir/$srcfile" $binfile \
executable {debug nowarnings}] != "" } {
untested circ.exp
return -1
}
# Tests:
# 1) Set up a trace experiment that will collect approximately 10 frames,
# requiring more than 512 but less than 1024 bytes of cache buffer.
# (most targets should have at least 1024 bytes of cache buffer!)
# Run and confirm that it collects all 10 frames.
# 2) Artificially limit the trace buffer to 512 bytes, and rerun the
# experiment. Confirm that the first several frames are collected,
# but that the last several are not.
# 3) Set trace buffer to circular mode, still with the artificial limit
# of 512 bytes, and rerun the experiment. Confirm that the last
# several frames are collected, but the first several are not.
#
# return 0 for success, 1 for failure
proc run_trace_experiment { pass } {
gdb_run_cmd
if [gdb_test "tstart" \
"\[\r\n\]*" \
"start trace experiment, pass $pass"] then { return 1; }
if [gdb_test "continue" \
"Continuing.*Breakpoint \[0-9\]+, end.*" \
"run to end, pass $pass"] then { return 1; }
if [gdb_test "tstop" \
"\[\r\n\]*" \
"stop trace experiment, pass $pass"] then { return 1; }
return 0;
}
# return 0 for success, 1 for failure
proc set_a_tracepoint { func } {
if [gdb_test "trace $func" \
"Tracepoint \[0-9\]+ at .*" \
"set tracepoint at $func"] then {
return 1;
}
if [gdb_trace_setactions "set actions for $func" \
"" \
"collect testload" "^$"] then {
return 1;
}
return 0;
}
# return 0 for success, 1 for failure
proc setup_tracepoints { } {
gdb_delete_tracepoints
if [set_a_tracepoint func0] then { return 1; }
if [set_a_tracepoint func1] then { return 1; }
if [set_a_tracepoint func2] then { return 1; }
if [set_a_tracepoint func3] then { return 1; }
if [set_a_tracepoint func4] then { return 1; }
if [set_a_tracepoint func5] then { return 1; }
if [set_a_tracepoint func6] then { return 1; }
if [set_a_tracepoint func7] then { return 1; }
if [set_a_tracepoint func8] then { return 1; }
if [set_a_tracepoint func9] then { return 1; }
return 0;
}
# return 0 for success, 1 for failure
proc trace_buffer_normal { } {
if [gdb_test "maint packet QTBuffer:size:ffffffff" \
"received: .OK." ""] then {
pass "This test cannot be run on this target"
return 1;
}
if [gdb_test "maint packet QTBuffer:circular:0" \
"received: .OK." ""] then {
pass "This test cannot be run on this target"
return 1;
}
return 0;
}
# return 0 for success, 1 for failure
proc gdb_trace_circular_tests { } {
# We generously give ourselves one "pass" if we successfully
# detect that this test cannot be run on this target!
if { ![gdb_target_supports_trace] } then {
pass "Current target does not support trace"
return 1;
}
if [trace_buffer_normal] then { return 1; }
gdb_test "break begin" ".*" ""
gdb_test "break end" ".*" ""
gdb_test "tstop" ".*" ""
gdb_test "tfind none" ".*" ""
if [setup_tracepoints] then { return 1; }
# First, run the trace experiment with default attributes:
# Make sure it behaves as expected.
if [run_trace_experiment 1] then { return 1; }
if [gdb_test "tfind start" \
"#0 func0 .*" \
"find frame zero, pass 1"] then { return 1; }
if [gdb_test "tfind 9" \
"#0 func9 .*" \
"find frame nine, pass 1"] then { return 1; }
if [gdb_test "tfind none" \
"#0 end .*" \
"quit trace debugging, pass 1"] then { return 1; }
# Then, shrink the trace buffer so that it will not hold
# all ten trace frames. Verify that frame zero is still
# collected, but frame nine is not.
if [gdb_test "maint packet QTBuffer:size:200" \
"received: .OK." "shrink the target trace buffer"] then {
return 1;
}
if [run_trace_experiment 2] then { return 1; }
if [gdb_test "tfind start" \
"#0 func0 .*" \
"find frame zero, pass 2"] then { return 1; }
if [gdb_test "tfind 9" \
".* failed to find .*" \
"fail to find frame nine, pass 2"] then { return 1; }
if [gdb_test "tfind none" \
"#0 end .*" \
"quit trace debugging, pass 2"] then { return 1; }
# Finally, make the buffer circular. Now when it runs out of
# space, it should wrap around and overwrite the earliest frames.
# This means that:
# 1) frame zero will be overwritten and therefore unavailable
# 2) the earliest frame in the buffer will be other-than-zero
# 3) frame nine will be available (unlike on pass 2).
if [gdb_test "maint packet QTBuffer:circular:1" \
"received: .OK." "make the target trace buffer circular"] then {
return 1;
}
if [run_trace_experiment 3] then { return 1; }
if [gdb_test "tfind start" \
"#0 func\[1-9\] .*" \
"first frame is NOT frame zero, pass 3"] then { return 1; }
if [gdb_test "tfind 9" \
"#0 func9 .*" \
"find frame nine, pass 3"] then { return 1; }
if [gdb_test "tfind none" \
"#0 end .*" \
"quit trace debugging, pass 3"] then { return 1; }
return 0;
}
# Start with a fresh gdb.
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load $binfile
gdb_test_no_output "set circular-trace-buffer on" \
"set circular-trace-buffer on"
gdb_test "show circular-trace-buffer" "Target's use of circular trace buffer is on." "show circular-trace-buffer (on)"
gdb_test_no_output "set circular-trace-buffer off" \
"set circular-trace-buffer off"
gdb_test "show circular-trace-buffer" "Target's use of circular trace buffer is off." "show circular-trace-buffer (off)"
# Body of test encased in a proc so we can return prematurely.
if { ![gdb_trace_circular_tests] } then {
# Set trace buffer attributes back to normal
trace_buffer_normal;
}
# Finished!
gdb_test "tfind none" ".*" ""
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