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# This testcase is part of GDB, the GNU debugger.
#
# Copyright 2016-2024 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/>.
# Skip this test if btrace is disabled.
require allow_btrace_tests allow_python_tests
load_lib gdb-python.exp
standard_testfile
if [prepare_for_testing "failed to prepare" $testfile $srcfile] { return -1 }
if {![runto_main]} {
return -1
}
with_test_prefix "no or double record" {
gdb_test "python print(gdb.current_recording())" "None"
gdb_test_no_output "python gdb.start_recording(\"btrace\")"
gdb_test "python gdb.start_recording(\"btrace\")" \
".*gdb\.error.*: The process is already being recorded\..*" \
"already recording"
gdb_test_no_output "python gdb.stop_recording()" "first"
gdb_test "python gdb.stop_recording()" \
".*gdb\.error.*: No recording is currently active\..*" "second"
}
with_test_prefix "preopened record btrace" {
gdb_test_no_output "record btrace"
gdb_test "python print(gdb.current_recording().method)" "btrace"
gdb_test "python print(gdb.current_recording().format)" "pt|bts"
gdb_test_no_output "python gdb.stop_recording()"
}
with_test_prefix "prepare record" {
gdb_test_no_output "python r = gdb.start_recording(\"btrace\")"
gdb_test "python print(r.method)" "btrace"
gdb_test "python print(r.format)" "pt|bts"
gdb_test "stepi 100" ".*"
# There's a HW bug affecting Processor Trace on some Intel processors.
# The bug was exposed by linux kernel commit 670638477aed
# ("perf/x86/intel/pt: Opportunistically use single range output mode"),
# added in version v5.5.0, and was worked around by commit ce0d998be927
# ("perf/x86/intel/pt: Fix sampling using single range output") in version
# 6.1.0. Detect the kernel version range for which the problem may
# manifest.
set have_xfail 0
set v [linux_kernel_version]
if { $v != {} } {
set have_xfail \
[expr [version_compare [list 5 5 0] <= $v] \
&& [version_compare $v < [list 6 1 0]]]
}
set nonl_re \[^\r\n\]
set xfail_re \
[join \
[list \
"warning: Decode error \\($nonl_re*\\) at instruction $decimal" \
"\\(offset = $hex, pc = $hex\\):" \
"$nonl_re*\\."]]
set xfail_re_2 \
[join \
[list \
"warning: Non-contiguous trace at instruction $decimal" \
"\\(offset = $hex\\)\\."]]
set got_xfail 0
set cmd "python insn = r.instruction_history"
gdb_test_multiple $cmd "" {
-re "^[string_to_regexp $cmd]\r\n$::gdb_prompt $" {
pass $gdb_test_name
}
-re -wrap "($xfail_re|$xfail_re_2)" {
if { $have_xfail } {
xfail $gdb_test_name
set got_xfail 1
} else {
fail $gdb_test_name
}
}
}
if { $got_xfail } {
return
}
# Also handle the case that we're running into the hw bug without
# triggering a decode error.
gdb_test_multiple "python print(len(insn))" "" {
-re -wrap "100" {
pass $gdb_test_name
}
-re -wrap "" {
if { $have_xfail } {
xfail $gdb_test_name
set got_xfail 1
} else {
fail $gdb_test_name
}
}
}
if { $got_xfail } {
return
}
gdb_test_no_output "python call = r.function_call_history"
gdb_test_no_output "python i = insn\[0\]"
gdb_test_no_output "python c = call\[0\]"
}
with_test_prefix "replay begin" {
gdb_test "python print(r.replay_position)" "None"
gdb_test "python r.goto(r.begin)"
gdb_test "python print(r.replay_position.number)" "1"
}
with_test_prefix "replay end" {
gdb_test "python r.goto(r.end)"
gdb_test "python print(r.replay_position)" "None"
}
with_test_prefix "instruction " {
gdb_test "python print(i.number)" "1"
gdb_test "python print(i.sal)" "symbol and line for .*"
gdb_test "python print(i.pc)" "$decimal"
gdb_test "python print(repr(i.data))" "<memory at $hex>"
gdb_test "python print(i.decoded)" ".*"
gdb_test "python print(i.size)" "$decimal"
gdb_test "python print(i.is_speculative)" "False"
}
with_test_prefix "function call" {
gdb_test "python print(c.number)" "1"
gdb_test "python print(c.symbol)" "main"
gdb_test "python print(c.level)" "$decimal"
gdb_test "python print(len(c.instructions))" "$decimal"
gdb_test "python print(c.up)" "None"
gdb_test "python print(c.prev)" "None"
gdb_test "python print(c == c.next.prev)" "True"
}
with_test_prefix "list" {
gdb_test "python print(len(insn\[23:65\]))" "42"
gdb_test "python print(insn\[17:\]\[2\].number)" "20"
gdb_test "python print(i in insn)" "True"
gdb_test "python print(i in call)" "False"
gdb_test "python print(c in insn)" "False"
gdb_test "python print(c in call)" "True"
gdb_test "python print(insn.index(i))" "0"
gdb_test "python print(insn.count(i))" "1"
}
with_test_prefix "sublist" {
gdb_test_no_output "python s1 = insn\[3:72:5\]"
gdb_test_no_output "python s2 = s1\[2:13:3\]"
gdb_test_no_output "python s3 = s1\[13:2:-3\]"
gdb_test_no_output "python s4 = insn\[::-1\]"
gdb_test "python print(\[i.number for i in s1\])" "\\\[4, 9, 14, 19, 24, 29, 34, 39, 44, 49, 54, 59, 64, 69\\\]"
gdb_test "python print(\[i.number for i in s2\])" "\\\[14, 29, 44, 59\\\]"
gdb_test "python print(\[i.number for i in s3\])" "\\\[69, 54, 39, 24\\\]"
gdb_test "python print(len(s1))" "14"
gdb_test "python print(len(s2))" "4"
gdb_test "python print(len(s3))" "4"
gdb_test "python print(len(s4))" "100"
gdb_test "python print(s4\[5\].number)" "95"
gdb_test "python print(s4\[-5\].number)" "5"
gdb_test "python print(s4\[100\].number)" ".*IndexError.*"
gdb_test "python print(s4\[-101\].number)" ".*IndexError.*"
}
with_test_prefix "level" {
gdb_test_no_output "python gdb.stop_recording()"
gdb_test "break inner" "Breakpoint.*"
gdb_test "continue" "Continuing\..*"
gdb_test_no_output "record btrace"
gdb_test "step" "outer ().*" "step one"
gdb_test "step" "main ().*" "step two"
gdb_test "python print(gdb.current_recording().function_call_history\[0\].level)" "1"
gdb_test "python print(gdb.current_recording().function_call_history\[1\].level)" "0"
}
# Note: GDB can incrementally add to the recording from the raw trace data.
# After a clear(), GDB might not have all the raw trace data available in its
# buffer to recreate the full recording it had before the clear().
# So, do this testing last to avoid disturbing subsequent tests.
with_test_prefix "clear" {
gdb_test_no_output "python r.clear()"
gdb_test "python insn = r.instruction_history"
gdb_test_no_output "python i = insn\[0\]"
gdb_test "python print(i.size)" "$decimal"
}
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