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Merge branch 'master' into no-manifests

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This commit is contained in:
Eelco Dolstra 2012-08-27 11:09:07 -04:00
commit e94806d030
20 changed files with 325 additions and 139 deletions
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86
src/libexpr/eval.cc
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@ -144,6 +144,8 @@ EvalState::EvalState()
{
nrEnvs = nrValuesInEnvs = nrValues = nrListElems = 0;
nrAttrsets = nrOpUpdates = nrOpUpdateValuesCopied = 0;
nrListConcats = nrPrimOpCalls = nrFunctionCalls = 0;
countCalls = getEnv("NIX_COUNT_CALLS", "0") != "0";
#if HAVE_BOEHMGC
static bool gcInitialised = true;
@ -300,8 +302,10 @@ inline Value * EvalState::lookupVar(Env * env, const VarRef & var)
if (var.fromWith) {
while (1) {
Bindings::iterator j = env->values[0]->attrs->find(var.name);
if (j != env->values[0]->attrs->end())
if (j != env->values[0]->attrs->end()) {
if (countCalls && j->pos) attrSelects[*j->pos]++;
return j->value;
}
if (env->prevWith == 0)
throwEvalError("undefined variable `%1%'", var.name);
for (unsigned int l = env->prevWith; l; --l, env = env->up) ;
@ -344,7 +348,7 @@ void EvalState::mkList(Value & v, unsigned int length)
{
v.type = tList;
v.list.length = length;
v.list.elems = (Value * *) GC_MALLOC(length * sizeof(Value *));
v.list.elems = length ? (Value * *) GC_MALLOC(length * sizeof(Value *)) : 0;
nrListElems += length;
}
@ -619,8 +623,10 @@ void ExprSelect::eval(EvalState & state, Env & env, Value & v)
}
vAttrs = j->value;
pos = j->pos;
if (state.countCalls && pos) state.attrSelects[*pos]++;
}
state.forceValue(*vAttrs);
} catch (Error & e) {
@ -700,6 +706,8 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v)
vArgs[n--] = arg->primOpApp.right;
/* And call the primop. */
nrPrimOpCalls++;
if (countCalls) primOpCalls[primOp->primOp->name]++;
try {
primOp->primOp->fun(*this, vArgs, v);
} catch (Error & e) {
@ -716,7 +724,7 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v)
}
if (fun.type != tLambda)
throwTypeError("attempt to call something which is neither a function nor a primop (built-in operation) but %1%",
throwTypeError("attempt to call something which is not a function but %1%",
showType(fun));
unsigned int size =
@ -760,6 +768,9 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v)
throwTypeError("function at %1% called with unexpected argument", fun.lambda.fun->pos);
}
nrFunctionCalls++;
if (countCalls) functionCalls[fun.lambda.fun->pos]++;
try {
fun.lambda.fun->body->eval(*this, env2, v);
} catch (Error & e) {
@ -902,14 +913,36 @@ void ExprOpUpdate::eval(EvalState & state, Env & env, Value & v)
void ExprOpConcatLists::eval(EvalState & state, Env & env, Value & v)
{
Value v1; e1->eval(state, env, v1);
state.forceList(v1);
Value v2; e2->eval(state, env, v2);
state.forceList(v2);
state.mkList(v, v1.list.length + v2.list.length);
for (unsigned int n = 0; n < v1.list.length; ++n)
v.list.elems[n] = v1.list.elems[n];
for (unsigned int n = 0; n < v2.list.length; ++n)
v.list.elems[n + v1.list.length] = v2.list.elems[n];
Value * lists[2] = { &v1, &v2 };
state.concatLists(v, 2, lists);
}
void EvalState::concatLists(Value & v, unsigned int nrLists, Value * * lists)
{
nrListConcats++;
Value * nonEmpty = 0;
unsigned int len = 0;
for (unsigned int n = 0; n < nrLists; ++n) {
forceList(*lists[n]);
unsigned int l = lists[n]->list.length;
len += l;
if (l) nonEmpty = lists[n];
}
if (nonEmpty && len == nonEmpty->list.length) {
v = *nonEmpty;
return;
}
mkList(v, len);
for (unsigned int n = 0, pos = 0; n < nrLists; ++n) {
unsigned int l = lists[n]->list.length;
memcpy(v.list.elems + pos, lists[n]->list.elems, l * sizeof(Value *));
pos += l;
}
}
@ -932,7 +965,7 @@ void ExprConcatStrings::eval(EvalState & state, Env & env, Value & v)
isPath = vStr.type == tPath;
first = false;
}
s << state.coerceToString(vStr, context, false, !isPath);
}
@ -1207,6 +1240,7 @@ void EvalState::printStats()
% nrEnvs % (nrEnvs * sizeof(Env) + nrValuesInEnvs * sizeof(Value *)));
printMsg(v, format(" list elements: %1% (%2% bytes)")
% nrListElems % (nrListElems * sizeof(Value *)));
printMsg(v, format(" list concatenations: %1%") % nrListConcats);
printMsg(v, format(" values allocated: %1% (%2% bytes)")
% nrValues % (nrValues * sizeof(Value)));
printMsg(v, format(" attribute sets allocated: %1%") % nrAttrsets);
@ -1216,6 +1250,36 @@ void EvalState::printStats()
printMsg(v, format(" number of thunks: %1%") % nrThunks);
printMsg(v, format(" number of thunks avoided: %1%") % nrAvoided);
printMsg(v, format(" number of attr lookups: %1%") % nrLookups);
printMsg(v, format(" number of primop calls: %1%") % nrPrimOpCalls);
printMsg(v, format(" number of function calls: %1%") % nrFunctionCalls);
if (countCalls) {
printMsg(v, format("calls to %1% primops:") % primOpCalls.size());
typedef std::multimap<unsigned int, Symbol> PrimOpCalls_;
std::multimap<unsigned int, Symbol> primOpCalls_;
foreach (PrimOpCalls::iterator, i, primOpCalls)
primOpCalls_.insert(std::pair<unsigned int, Symbol>(i->second, i->first));
foreach_reverse (PrimOpCalls_::reverse_iterator, i, primOpCalls_)
printMsg(v, format("%1$10d %2%") % i->first % i->second);
printMsg(v, format("calls to %1% functions:") % functionCalls.size());
typedef std::multimap<unsigned int, Pos> FunctionCalls_;
std::multimap<unsigned int, Pos> functionCalls_;
foreach (FunctionCalls::iterator, i, functionCalls)
functionCalls_.insert(std::pair<unsigned int, Pos>(i->second, i->first));
foreach_reverse (FunctionCalls_::reverse_iterator, i, functionCalls_)
printMsg(v, format("%1$10d %2%") % i->first % i->second);
printMsg(v, format("evaluations of %1% attributes:") % attrSelects.size());
typedef std::multimap<unsigned int, Pos> AttrSelects_;
std::multimap<unsigned int, Pos> attrSelects_;
foreach (AttrSelects::iterator, i, attrSelects)
attrSelects_.insert(std::pair<unsigned int, Pos>(i->second, i->first));
foreach_reverse (AttrSelects_::reverse_iterator, i, attrSelects_)
printMsg(v, format("%1$10d %2%") % i->first % i->second);
}
}