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Random db flush crash simulator

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This commit is contained in:
Pieter Wuille 2017-04-05 01:37:09 -07:00
parent 0580ee08ff
commit eaca1b7b08
2 changed files with 11 additions and 2 deletions
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2
contrib/devtools/check-doc.py
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@ -21,7 +21,7 @@ CMD_GREP_DOCS = r"egrep -r -I 'HelpMessageOpt\(\"\-[^\"=]+?(=|\")' %s" % (CMD_RO
REGEX_ARG = re.compile(r'(?:map(?:Multi)?Args(?:\.count\(|\[)|Get(?:Bool)?Arg\()\"(\-[^\"]+?)\"')
REGEX_DOC = re.compile(r'HelpMessageOpt\(\"(\-[^\"=]+?)(?:=|\")')
# list unsupported, deprecated and duplicate args as they need no documentation
SET_DOC_OPTIONAL = set(['-rpcssl', '-benchmark', '-h', '-help', '-socks', '-tor', '-debugnet', '-whitelistalwaysrelay', '-prematurewitness', '-walletprematurewitness', '-promiscuousmempoolflags', '-blockminsize'])
SET_DOC_OPTIONAL = set(['-rpcssl', '-benchmark', '-h', '-help', '-socks', '-tor', '-debugnet', '-whitelistalwaysrelay', '-prematurewitness', '-walletprematurewitness', '-promiscuousmempoolflags', '-blockminsize', '-dbcrashratio'])
def main():
used = check_output(CMD_GREP_ARGS, shell=True)

11
src/txdb.cpp
View file

@ -7,8 +7,10 @@
#include "chainparams.h"
#include "hash.h"
#include "random.h"
#include "pow.h"
#include "uint256.h"
#include "util.h"
#include <stdint.h>
@ -82,7 +84,7 @@ bool CCoinsViewDB::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) {
size_t count = 0;
size_t changed = 0;
size_t batch_size = (size_t)GetArg("-dbbatchsize", nDefaultDbBatchSize);
int crash_simulate = GetArg("-dbcrashratio", 0);
uint256 old_tip = GetBestBlock();
if (old_tip.IsNull()) {
@ -124,6 +126,13 @@ bool CCoinsViewDB::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) {
LogPrint(BCLog::COINDB, "Writing partial batch of %.2f MiB\n", batch.SizeEstimate() * (1.0 / 1048576.0));
db.WriteBatch(batch);
batch.Clear();
if (crash_simulate) {
static FastRandomContext rng;
if (rng.randrange(crash_simulate) == 0) {
LogPrintf("Simulating a crash. Goodbye.\n");
exit(0);
}
}
}
}