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#!/usr/bin/env bpftrace
/*
USAGE:
bpftrace contrib/tracing/log_utxos.bt
This script requires a 'bitcoind' binary compiled with eBPF support and the
'utxochache' tracepoints. By default, it's assumed that 'bitcoind' is
located in './src/bitcoind'. This can be modified in the script below.
NOTE: requires bpftrace v0.12.0 or above.
*/
BEGIN
{
printf("%-7s %-71s %16s %7s %8s\n",
"OP", "Outpoint", "Value", "Height", "Coinbase");
}
/*
Attaches to the 'utxocache:add' tracepoint and prints additions to the UTXO set cache.
*/
usdt:./src/bitcoind:utxocache:add
{
$txid = arg0;
$index = (uint32)arg1;
$height = (uint32)arg2;
$value = (int64)arg3;
$isCoinbase = arg4;
printf("Added ");
$p = $txid + 31;
unroll(32) {
$b = *(uint8*)$p;
printf("%02x", $b);
$p-=1;
}
printf(":%-6d %16ld %7d %s\n", $index, $value, $height, ($isCoinbase ? "Yes" : "No" ));
}
/*
Attaches to the 'utxocache:spent' tracepoint and prints spents from the UTXO set cache.
*/
usdt:./src/bitcoind:utxocache:spent
{
$txid = arg0;
$index = (uint32)arg1;
$height = (uint32)arg2;
$value = (int64)arg3;
$isCoinbase = arg4;
printf("Spent ");
$p = $txid + 31;
unroll(32) {
$b = *(uint8*)$p;
printf("%02x", $b);
$p-=1;
}
printf(":%-6d %16ld %7d %s\n", $index, $value, $height, ($isCoinbase ? "Yes" : "No" ));
}
/*
Attaches to the 'utxocache:uncache' tracepoint and uncache UTXOs from the UTXO set cache.
*/
usdt:./src/bitcoind:utxocache:uncache
{
$txid = arg0;
$index = (uint32)arg1;
$height = (uint32)arg2;
$value = (int64)arg3;
$isCoinbase = arg4;
printf("Uncache ");
$p = $txid + 31;
unroll(32) {
$b = *(uint8*)$p;
printf("%02x", $b);
$p-=1;
}
printf(":%-6d %16ld %7d %s\n", $index, $value, $height, ($isCoinbase ? "Yes" : "No" ));
}
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