Created
October 26, 2022 10:56
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#!/bin/bash | |
set -u -e | |
PREFIX="INSN_CNT" | |
BIN="test" | |
PARAMS="" | |
SRC="sut.S" | |
FN="func" | |
MAX_BP_JUMPS_KNOWN=$(grep -c -nP '^\s+j\s' "$SRC") | |
MAX_BP_JUMPS_UNKNOWN=$((MAX_BP_JUMPS_KNOWN + $(grep -c -nP '^\s+j\w*r\s' "$SRC"))) | |
branches() | |
{ | |
# Order matters, first known target jumps, then jumps, then branches | |
while read -r line; do | |
echo " gdb.Breakpoint(\"$SRC: $line\")" | |
done < <(grep -nP '^\s+j\s' "$SRC" | cut -d: -f1) | |
while read -r line; do | |
echo " gdb.Breakpoint(\"$SRC: $line\")" | |
done < <(grep -nP '^\s+j\w*r\s' "$SRC" | cut -d: -f1) | |
while read -r line; do | |
echo " gdb.Breakpoint(\"$SRC: $line\")" | |
done < <(grep -nP '^\s+b' "$SRC" | cut -d: -f1) | |
} | |
cat <<EOF > insn-count.py | |
fn = "$FN" | |
count = 0 | |
branch_count = 0 | |
jump_known_count = 0 | |
jump_unknown_count = 0 | |
cmd = "r $PARAMS" | |
not_done = True | |
def stop_handler(event): | |
global branch_count | |
global jump_known_count | |
global jump_unknown_count | |
global count | |
global cmd | |
global not_done | |
if isinstance(event, gdb.BreakpointEvent) and event.breakpoint.location == fn: | |
gdb.FinishBreakpoint() | |
cmd = "si" | |
elif isinstance(event, gdb.BreakpointEvent) and event.breakpoint.location.startswith("$SRC"): | |
count += 1 | |
if event.breakpoint.number <= $MAX_BP_JUMPS_KNOWN: | |
jump_known_count += 1 | |
elif event.breakpoint.number <= $MAX_BP_JUMPS_UNKNOWN: | |
jump_unknown_count += 1 | |
else: | |
branch_count += 1 | |
cmd = "si" | |
elif isinstance(event, gdb.BreakpointEvent): | |
gdb.write("$PREFIX: insn-count: {}\n".format(count)) | |
gdb.write("$PREFIX: branch-count: {}\n".format(branch_count)) | |
gdb.write("$PREFIX: jump-known-count: {}\n".format(jump_known_count)) | |
gdb.write("$PREFIX: jump-unknown-count: {}\n".format(jump_unknown_count)) | |
not_done = False | |
cmd = "c" | |
elif isinstance(event, gdb.StopEvent): | |
count += 1 | |
cmd = "si" | |
else: | |
raise gdb.GdbError("Unexpected event: {}".format(event)) | |
def insn_count(): | |
gdb.execute("set pagination off") | |
gdb.execute("set confirm off") | |
$(branches) | |
gdb.Breakpoint(fn) | |
gdb.events.stop.connect(stop_handler) | |
while not_done: | |
gdb.execute(cmd) | |
gdb.execute("q") | |
insn_count() | |
EOF | |
echo "source insn-count.py" > insn-count.gdb | |
cmd="gdb -x insn-count.gdb $BIN | grep $PREFIX" | |
echo "$cmd" | |
"$cmd" |
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