diff options
| -rw-r--r-- | src/util.cpp | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/src/util.cpp b/src/util.cpp index 7946089571..a96963689a 100644 --- a/src/util.cpp +++ b/src/util.cpp @@ -169,8 +169,17 @@ void RandAddSeedPerfmon() // Don't need this on Linux, OpenSSL automatically uses /dev/urandom // Seed with the entire set of perfmon data std::vector <unsigned char> vData(250000,0); - unsigned long nSize = vData.size(); - long ret = RegQueryValueExA(HKEY_PERFORMANCE_DATA, "Global", NULL, NULL, begin_ptr(vData), &nSize); + long ret = 0; + unsigned long nSize = 0; + 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); if (ret == ERROR_SUCCESS) { |