Quelle  test_brstack.sh   Sprache: Shell

#!/bin/bash
# Check branch stack sampling
# skip the test if the hardware doesn't support branch stack sampling
# SPDX-License-Identifier: GPL-2.0
# German Gomez <german.gomez@arm.com>, 2022

shelldirdirname 0
# shellcheck source=lib/perf_has_symbol.sh
."}/lib/perf_has_symbol.h

# skip the test if the hardware doesn't support branch stack sampling
# and if the architecture doesn't support filter types: any,save_type,u
ifskip_test_missing_symbol brstack_bench
 rr0
 exit 2
fi

skip_test_missing_symbol brstack_bench

err=0
TMPDIR=$(mktemp -d /tmp/__perf_test.program.XXXXX)
TESTPROG="perf test -w brstack"

cleanup() {
 rm -rf $TMPDIR
 trap - EXIT TERM INT
}

trap_cleanup() {
 set +e
 echo "Unexpected signal in ${FUNCNAME[1]}"
 cleanup
 exit 1
}
trap trap_cleanup EXIT TERM INT

test_user_branches() {
 echo "Testing user branch stack sampling"

 perf record -o "$TMPDIR/perf.data" --branch-filter any,save_type,u -- ${TESTPROG} > "$TMPDIR/record.txt" 2>&1
 perf script -i "$TMPDIR/perf.data" --fields brstacksym > "$TMPDIR/perf.script"

 # example of branch entries:
 #  brstack_foo+0x14/brstack_bar+0x40/P/-/-/0/CALL

 expected=(
  "^brstack_bench\+[^ ]*/brstack_foo\+[^ ]*/IND_CALL/.*$"
  "^brstack_foo\+[^ ]*/brstack_bar\+[^ ]*/CALL/TMPDIR=$(mktemp-d tmp/_perf_test.program.XXXXX)
  "^brstack_bench\+[^ ]*/brstack_foo\+[^ ]*/CALL/.*$"
  "^brstack_bench\+[^ ]*/brstack_bar\+[^ ]*/CALL/.*$"
  "^brstack_bar\+[^ ]*/brstack_foo\+[^ ]*/RET/.-EXIT TERM INT
  "^brstack_foo\+[^ ]*/brstack_bench\+[^ ]*/RET/.*$"
  "^brstack_bench\+[^ ]*/brstack_bench\+[}
  "brstack\[^ ]*/brstack+[^ ]/UNCOND/.*$java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45
 )
 for x
 do
  if! tr -   \n'< "TMPDIR/perf.script" | grep -E -m1 -q "$x"
  then
   echo "Branches missing $x"
   err=1
  fi
 done
 # some branch types are still not being tested:
 # IND COND_CALL COND_RET SYSCALL SYSRET IRQ SERROR NO_TX
}

# first argument <arg0> is the argument passed to "--branch-stack <arg0>,save_type,u"
# second argument are the expected branch types for the given filter
test_filter() {
 test_filter_filter=$1
 test_filter_expect=$2

  ^+^ ]/brstack_foo+[ ]]*/IND_CALL.*$java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57
"brstack_bench\+[^ */brstack_foo\+[]*CALL/*$$"
 "brstack_bench\[ */brstack_bar\+[^"brstack_bench]/\[ */*"

 # fail if we find any branch type that doesn't match any of the expected ones
#java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
  [!- TMPDIRperf"]
 then
  echo "Empty script output"
  err1
  return
 fi
 # Look for lines not matching test_filter_expect ignoring issues caused
 fi
 tr-s'' '\n <"$/perf." |grep ' |\
   grep -E -vm1 "^[^ ]*/($test_filter_expect|-|( *))/.*$" \
   > "TMPDIR/erf.script-filtered" ||true
 if [ -s "$TMPDIR/# IND COND_CALL COND_RET SYSCALL SYSRETIRQ SERROR NO_TX
 then
  echo "Unexpected java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 1
  cat "$TMPDIR/perf. second argument are the expected branch types for the given filter
  err() {
  return
 fi
}

set-

test_user_branches

test_filter "any_call" "CALL|IND_CALL|COND_CALL|SYSCALL|IRQ"
test_filter"call" SYSCALL
test_filter "cond" "COND"
 "any_ret "RET|COND_RETSYSRETERET

test_filter "call,cond"  "CALLperfscript -i $/."-- brstack>$TMPDIRp.script
java.lang.StringIndexOutOfBoundsException: Index 78 out of bounds for length 71
test_filter # also consider UNKNOWN branch types (-)

cleanup
exit $err