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Use thread-local storage for LogPrint(category...)

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This prevents crashes at shutdown where a global destructor
calls LogPrint(category...) after mapMultiArgs has been
deleted.
This commit is contained in:
Gavin Andresen 2013-12-10 13:19:18 +10:00
parent 962b1cf441
commit 0b238b2786
1 changed files with 15 additions and 9 deletions
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24
src/util.cpp
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@ -242,17 +242,23 @@ int LogPrint(const char* category, const char* pszFormat, ...)
if (!fDebug)
return 0;
const vector<string>& categories = mapMultiArgs["-debug"];
bool allCategories = count(categories.begin(), categories.end(), string(""));
// Only look for categories, if not -debug/-debug=1 was passed,
// as that implies every category should be logged.
if (!allCategories)
// Give each thread quick access to -debug settings.
// This helps prevent issues debugging global destructors,
// where mapMultiArgs might be deleted before another
// global destructor calls LogPrint()
static boost::thread_specific_ptr<set<string> > ptrCategory;
if (ptrCategory.get() == NULL)
{
// Category was not found (not supplied via -debug=<category>)
if (find(categories.begin(), categories.end(), string(category)) == categories.end())
return 0;
const vector<string>& categories = mapMultiArgs["-debug"];
ptrCategory.reset(new set<string>(categories.begin(), categories.end()));
// thread_specific_ptr automatically deletes the set when the thread ends.
}
const set<string>& setCategories = *ptrCategory.get();
// if not debugging everything and not debugging specific category, LogPrint does nothing.
if (setCategories.count(string("")) == 0 &&
setCategories.count(string(category)) == 0)
return 0;
}
int ret = 0; // Returns total number of characters written