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qa: Initialize lockstack to prevent null pointer deref

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MarcoFalke 2018-05-21 21:35:47 -04:00
parent d792e47421
commit fa9da85b7c
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GPG key ID: CE2B75697E69A548
1 changed files with 8 additions and 11 deletions
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19
src/sync.cpp
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@ -75,7 +75,7 @@ struct LockData {
std::mutex dd_mutex;
} static lockdata;
static thread_local std::unique_ptr<LockStack> lockstack;
static thread_local LockStack g_lockstack;
static void potential_deadlock_detected(const std::pair<void*, void*>& mismatch, const LockStack& s1, const LockStack& s2)
{
@ -105,21 +105,18 @@ static void potential_deadlock_detected(const std::pair<void*, void*>& mismatch,
static void push_lock(void* c, const CLockLocation& locklocation)
{
if (!lockstack)
lockstack.reset(new LockStack);
std::lock_guard<std::mutex> lock(lockdata.dd_mutex);
lockstack->push_back(std::make_pair(c, locklocation));
g_lockstack.push_back(std::make_pair(c, locklocation));
for (const std::pair<void*, CLockLocation> & i : (*lockstack)) {
for (const std::pair<void*, CLockLocation>& i : g_lockstack) {
if (i.first == c)
break;
std::pair<void*, void*> p1 = std::make_pair(i.first, c);
if (lockdata.lockorders.count(p1))
continue;
lockdata.lockorders[p1] = (*lockstack);
lockdata.lockorders[p1] = g_lockstack;
std::pair<void*, void*> p2 = std::make_pair(c, i.first);
lockdata.invlockorders.insert(p2);
@ -130,7 +127,7 @@ static void push_lock(void* c, const CLockLocation& locklocation)
static void pop_lock()
{
(*lockstack).pop_back();
g_lockstack.pop_back();
}
void EnterCritical(const char* pszName, const char* pszFile, int nLine, void* cs, bool fTry)
@ -146,14 +143,14 @@ void LeaveCritical()
std::string LocksHeld()
{
std::string result;
for (const std::pair<void*, CLockLocation> & i : *lockstack)
for (const std::pair<void*, CLockLocation>& i : g_lockstack)
result += i.second.ToString() + std::string("\n");
return result;
}
void AssertLockHeldInternal(const char* pszName, const char* pszFile, int nLine, void* cs)
{
for (const std::pair<void*, CLockLocation> & i : *lockstack)
for (const std::pair<void*, CLockLocation>& i : g_lockstack)
if (i.first == cs)
return;
fprintf(stderr, "Assertion failed: lock %s not held in %s:%i; locks held:\n%s", pszName, pszFile, nLine, LocksHeld().c_str());
@ -162,7 +159,7 @@ void AssertLockHeldInternal(const char* pszName, const char* pszFile, int nLine,
void AssertLockNotHeldInternal(const char* pszName, const char* pszFile, int nLine, void* cs)
{
for (const std::pair<void*, CLockLocation>& i : *lockstack) {
for (const std::pair<void*, CLockLocation>& i : g_lockstack) {
if (i.first == cs) {
fprintf(stderr, "Assertion failed: lock %s held in %s:%i; locks held:\n%s", pszName, pszFile, nLine, LocksHeld().c_str());
abort();