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Merge pull request #4392

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8ae973c Allocate more space if necessary in RandSeedAddPerfMon (Wladimir J. van der Laan)
be873f6 Issue warning if collecting RandSeed data failed (Wladimir J. van der Laan)
fcb0a1b change "char pch[200000]" to "new char[200000]" (daniel)
This commit is contained in:
Wladimir J. van der Laan 2014-06-26 17:10:52 +02:00
commit eacff4a9c6
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GPG Key ID: 74810B012346C9A6
1 changed files with 26 additions and 11 deletions
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37
src/util.cpp
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@ -167,16 +167,31 @@ void RandAddSeedPerfmon()
#ifdef WIN32 #ifdef WIN32
// Don't need this on Linux, OpenSSL automatically uses /dev/urandom // Don't need this on Linux, OpenSSL automatically uses /dev/urandom
// Seed with the entire set of perfmon data // Seed with the entire set of perfmon data
unsigned char pdata[250000]; std::vector <unsigned char> vData(250000,0);
memset(pdata, 0, sizeof(pdata)); long ret = 0;
unsigned long nSize = sizeof(pdata); unsigned long nSize = 0;
long ret = RegQueryValueExA(HKEY_PERFORMANCE_DATA, "Global", NULL, NULL, pdata, &nSize); const size_t nMaxSize = 10000000; // Bail out at more than 10MB of performance data
while (true)
{
nSize = vData.size();
ret = RegQueryValueExA(HKEY_PERFORMANCE_DATA, "Global", NULL, NULL, begin_ptr(vData), &nSize);
if (ret != ERROR_MORE_DATA || vData.size() >= nMaxSize)
break;
vData.resize(std::max((vData.size()*3)/2, nMaxSize)); // Grow size of buffer exponentially
}
RegCloseKey(HKEY_PERFORMANCE_DATA); RegCloseKey(HKEY_PERFORMANCE_DATA);
if (ret == ERROR_SUCCESS) if (ret == ERROR_SUCCESS)
{ {
RAND_add(pdata, nSize, nSize/100.0); RAND_add(begin_ptr(vData), nSize, nSize/100.0);
OPENSSL_cleanse(pdata, nSize); OPENSSL_cleanse(begin_ptr(vData), nSize);
LogPrint("rand", "RandAddSeed() %lu bytes\n", nSize); LogPrint("rand", "%s: %lu bytes\n", __func__, nSize);
} else {
static bool warned = false; // Warn only once
if (!warned)
{
LogPrintf("%s: Warning: RegQueryValueExA(HKEY_PERFORMANCE_DATA) failed with code %i\n", __func__, ret);
warned = true;
}
} }
#endif #endif
} }
@ -1140,15 +1155,15 @@ void ShrinkDebugFile()
if (file && boost::filesystem::file_size(pathLog) > 10 * 1000000) if (file && boost::filesystem::file_size(pathLog) > 10 * 1000000)
{ {
// Restart the file with some of the end // Restart the file with some of the end
char pch[200000]; std::vector <char> vch(200000,0);
fseek(file, -sizeof(pch), SEEK_END); fseek(file, -vch.size(), SEEK_END);
int nBytes = fread(pch, 1, sizeof(pch), file); int nBytes = fread(begin_ptr(vch), 1, vch.size(), file);
fclose(file); fclose(file);
file = fopen(pathLog.string().c_str(), "w"); file = fopen(pathLog.string().c_str(), "w");
if (file) if (file)
{ {
fwrite(pch, 1, nBytes, file); fwrite(begin_ptr(vch), 1, nBytes, file);
fclose(file); fclose(file);
} }
} }