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-rw-r--r--src/init.cpp5
-rw-r--r--src/util.cpp8
2 files changed, 10 insertions, 3 deletions
diff --git a/src/init.cpp b/src/init.cpp
index d7d60b0fbc..7c108ac4a6 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -1146,8 +1146,11 @@ bool AppInitMain(boost::thread_group& threadGroup, CScheduler& scheduler)
#ifndef WIN32
CreatePidFile(GetPidFile(), getpid());
#endif
- if (GetBoolArg("-shrinkdebugfile", !fDebug))
+ if (GetBoolArg("-shrinkdebugfile", !fDebug)) {
+ // Do this first since it both loads a bunch of debug.log into memory,
+ // and because this needs to happen before any other debug.log printing
ShrinkDebugFile();
+ }
if (fPrintToDebugLog)
OpenDebugLog();
diff --git a/src/util.cpp b/src/util.cpp
index 08ee6b8b87..ba157625d8 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -723,13 +723,17 @@ void AllocateFileRange(FILE *file, unsigned int offset, unsigned int length) {
void ShrinkDebugFile()
{
+ // Amount of debug.log to save at end when shrinking (must fit in memory)
+ constexpr size_t RECENT_DEBUG_HISTORY_SIZE = 10 * 1000000;
// Scroll debug.log if it's getting too big
boost::filesystem::path pathLog = GetDataDir() / "debug.log";
FILE* file = fopen(pathLog.string().c_str(), "r");
- if (file && boost::filesystem::file_size(pathLog) > 10 * 1000000)
+ // If debug.log file is more than 10% bigger the RECENT_DEBUG_HISTORY_SIZE
+ // trim it down by saving only the last RECENT_DEBUG_HISTORY_SIZE bytes
+ if (file && boost::filesystem::file_size(pathLog) > 11 * (RECENT_DEBUG_HISTORY_SIZE / 10))
{
// Restart the file with some of the end
- std::vector <char> vch(200000,0);
+ std::vector<char> vch(RECENT_DEBUG_HISTORY_SIZE, 0);
fseek(file, -((long)vch.size()), SEEK_END);
int nBytes = fread(vch.data(), 1, vch.size(), file);
fclose(file);