Esempio n. 1
0
// Main lua VM debug hook
void LSProfiler::profileHook(lua_State *L, lua_Debug *ar)
{
    // Only process calls from the main thread for now
#ifdef LOOM_ENABLE_JIT
    lua_State *mainL = mainthread(G(L));
#else
    lua_State *mainL = L->l_G->mainthread;
#endif
    if (mainL != L)
        return;

    MethodBase *methodBase = NULL;

    if (ar->event == LUA_HOOKCALL)
    {
        methodBase = getTopMethod(L);

        if (methodBase)
        {
            methodStack.push(methodBase);
            enterMethod(methodBase->getFullMemberName());
        }
    }

    if (ar->event == LUA_HOOKRET)
    {
        methodBase = getTopMethod(L);

        if (methodBase)
        {
            if (methodStack.size())
            {
                methodStack.pop();
                leaveMethod(methodBase->getFullMemberName());
            }
        }
    }
}
Esempio n. 2
0
void LSProfiler::getCurrentStack(lua_State *L, utStack<MethodBase *>& stack)
{
    int       top = lua_gettop(L);
    lua_Debug lstack;
    int       stackFrame = 0;

    MethodBase *lastMethod = NULL;

    while (true)
    {
        // if we get a null result here, we are out of stack
        if (!lua_getstack(L, stackFrame++, &lstack))
        {
            lua_settop(L, top);
            return;
        }

        // something bad in denmark
        if (!lua_getinfo(L, "f", &lstack))
        {
            lua_settop(L, top);
            return;
        }

        bool cfunc = false;
        if (lua_iscfunction(L, -1))
        {
            cfunc = true;
        }

        lua_rawgeti(L, LUA_GLOBALSINDEX, LSINDEXMETHODLOOKUP);
        lua_pushvalue(L, -2);
        lua_rawget(L, -2);

        if (lua_isnil(L, -1))
        {
            lua_settop(L, top);
            continue;
        }

        MethodBase *methodBase = (MethodBase *)lua_topointer(L, -1);

        lua_settop(L, top);

#ifdef LOOM_ENABLE_JIT
        // We do not receive line return hooks for native calls under JIT :(
        // So, don't add to initial stack
        if (cfunc)
        {
            continue;
        }
#endif


        if (shouldFilterFunction(methodBase->getFullMemberName()))
        {
            continue;
        }

        // we only want the root call, not the pcall wrapper
        if (cfunc && (lastMethod == methodBase))
        {
            continue;
        }

        lastMethod = methodBase;

        stack.push(methodBase);
    }
}
Esempio n. 3
0
void LSProfiler::dumpAllocations(lua_State *L)
{
    lua_gc(L, LUA_GCCOLLECT, 0);

#ifdef LOOM_ENABLE_JIT
    lmLog(gProfilerLogGroup, "Please note: Profiling under JIT does not include native function calls.");
    lmLog(gProfilerLogGroup, "switch to the interpreted VM in order to gather native method allocation");
#endif

    utList<LSProfilerTypeAllocation *> allocs;
    utHashTable<utPointerHashKey, MethodAllocation> methodAggr;

    // Prepare for object allocation dump
    for (UTsize i = 0; i < allocations.size(); i++)
    {
        LSProfilerTypeAllocation* alloc = allocations.at(i);
        allocs.push_back(alloc);
    }

    lmLog(gProfilerLogGroup, "");
    lmLog(gProfilerLogGroup, "Object Allocation Dump");
    lmLog(gProfilerLogGroup, "----------------------");

    while (allocs.size())
    {
        int best = -1;
        LSProfilerTypeAllocation *bestType = NULL;

        for (UTsize i = 0; i < allocs.size(); i++)
        {
            LSProfilerTypeAllocation *alloc = allocs.at(i);

            if (alloc->alive > best)
            {
                best     = alloc->alive;
                bestType = alloc;
            }
        }

        lmAssert(bestType, "couldn't get bestType");

        allocs.erase(bestType);

        lmLog(gProfilerLogGroup, "Alive: %i (%i KiB), Total: %i (%i KiB), Type: %s", bestType->alive, bestType->memoryCurrent/1024, bestType->total, bestType->memoryTotal/1024, bestType->type->getFullName().c_str());

        if (bestType->anonTotal)
        {
            lmLog(gProfilerLogGroup, "    Alive: %i, Total %i (Anonymous)", bestType->anonTotal, bestType->anonCurrent);
        }

        for (UTsize j = 0; j < bestType->methodCurrent.size(); j++)
        {
            MethodBase *methodBase = (MethodBase *)bestType->methodCurrent.keyAt(j).key();
            lmAssert(methodBase == (MethodBase *)bestType->methodTotal.keyAt(j).key(), "mismatched methodbase");

            int *value1 = bestType->methodCurrent.get(methodBase);
            int *value2 = bestType->methodTotal.get(methodBase);

            lmAssert(value1 && value2, "bad pointer on allocation");

            lmLog(gProfilerLogGroup, "     Alive %i, Total %i (%s)", (*value1), (*value2), methodBase->getFullMemberName());
        }
    }

    // Aggregate method allocations
    for (UTsize i = 0; i < allocations.size(); i++)
    {
        LSProfilerTypeAllocation* alloc = allocations.at(i);
        utHashTable<utPointerHashKey, int> &methodCurrent = alloc->methodCurrent;
        utHashTable<utPointerHashKey, int> &methodTotal = alloc->methodTotal;
        for (UTsize j = 0; j < methodCurrent.size(); j++) {
            utPointerHashKey key = methodCurrent.keyAt(j);
            int *current = methodCurrent.get(key);
            lmAssert(current != NULL, "Internal hash table error");
            int *total = methodTotal.get(key);
            lmAssert(total != NULL, "Internal total hash table inconsistency error");
            MethodAllocation *aggr = methodAggr.get(key);
            if (aggr == NULL)
            {
                // First seen method, insert initial values
                MethodAllocation ma;
                ma.currentCount = *current;
                ma.totalCount = *total;
                ma.currentBytes = alloc->memoryCurrent;
                ma.totalBytes = alloc->memoryTotal;
                ma.allocations.push_back(alloc);
                methodAggr.insert(key, ma);
            }
            else
            {
                // Method already seen, update tracked values
                aggr->currentCount += *current;
                aggr->totalCount += *total;
                aggr->currentBytes += alloc->memoryCurrent;
                aggr->totalBytes += alloc->memoryTotal;
                aggr->allocations.push_back(alloc);
            }
        }
    }

    utArray<int> sortByTotal;
    sortByTotal.resize(methodAggr.size());
    for (UTsize i = 0; i < sortByTotal.size(); i++) sortByTotal[i] = i;

    sortMethods = &methodAggr;
    SDL_qsort((void*)sortByTotal.ptr(), sortByTotal.size(), sizeof(int), sortMethodsByTotalCount);
    sortMethods = NULL;

    lmLog(gProfilerLogGroup, "");
    lmLog(gProfilerLogGroup, "Aggregated Method Allocation");
    lmLog(gProfilerLogGroup, "----------------------------");

    for (UTsize i = 0; i < methodAggr.size(); i++)
    {
        utPointerHashKey key = methodAggr.keyAt(sortByTotal[i]);
        MethodBase *methodBase = (MethodBase *)key.key();
        lmAssert(methodBase != NULL, "Internal aggregated method base missing");
        MethodAllocation &ma = *methodAggr.get(key);
        
        lmLog(gProfilerLogGroup, "Total: %i (%i KiB), Alive: %i (%i KiB), Method: %s", ma.totalCount, ma.totalBytes/1024, ma.currentCount, ma.currentBytes/1024, methodBase->getFullMemberName());
        
        //SDL_qsort((void*)ma.allocations.ptr(), ma.allocations.size(), sizeof(LSProfilerTypeAllocation*), sortAllocsByTotal);

        for (UTsize j = 0; j < ma.allocations.size(); j++)
        {
            LSProfilerTypeAllocation* alloc = ma.allocations.at(j);
            int &methodCurrent = *alloc->methodCurrent.get(key);
            int &methodTotal = *alloc->methodTotal.get(key);
            lmLog(gProfilerLogGroup, "     Total: %i / %i (%i kiB), Alive: %i / %i (%i KiB), Type: %s", methodTotal, alloc->total, alloc->memoryTotal / 1024, methodCurrent, alloc->alive, alloc->memoryCurrent / 1024, alloc->type->getFullName().c_str());
        }
    }

}
Esempio n. 4
0
MethodBase *LSProfiler::getTopMethod(lua_State *L)
{
    int       top = lua_gettop(L);
    lua_Debug stack;

    // if we get a null result here, we are out of stack
    if (!lua_getstack(L, 0, &stack))
    {
        lua_settop(L, top);
        return NULL;
    }

    if (!lua_getinfo(L, "f", &stack))
    {
        lua_settop(L, top);
        return NULL;
    }

    bool iscfunc = false;
    if (lua_iscfunction(L, -1))
    {
        iscfunc = true;
    }


#ifdef LOOM_ENABLE_JIT
    // We do not receive line return hooks for native calls under JIT :(
    // So, if we want to profile native methods, we need to be under interpreted VM
    if (iscfunc)
    {
        lua_settop(L, top);
        return NULL;
    }
#endif


    lua_rawgeti(L, LUA_GLOBALSINDEX, LSINDEXMETHODLOOKUP);
    lua_pushvalue(L, -2);
    lua_rawget(L, -2);

    if (lua_isnil(L, -1))
    {
        lua_settop(L, top);
        return NULL;
    }

    MethodBase *methodBase = (MethodBase *)lua_topointer(L, -1);

    lua_settop(L, top);

    if (iscfunc && !methodBase->isNative())
    {
        return NULL;
    }

    if (shouldFilterFunction(methodBase->getFullMemberName()))
    {
        return NULL;
    }

    return methodBase;
}