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* Merge the GC branch.

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This commit is contained in:
Eelco Dolstra 2010-10-29 15:04:39 +00:00
parent 8dadcede65 26def5392f
commit 4aced7f8d0
30 changed files with 681 additions and 416 deletions
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2
Makefile.am
View file

@ -2,6 +2,8 @@ SUBDIRS = externals src scripts corepkgs doc misc tests
EXTRA_DIST = substitute.mk nix.spec nix.spec.in bootstrap.sh \
nix.conf.example NEWS version
pkginclude_HEADERS = config.h
include ./substitute.mk
nix.spec: nix.spec.in

13
configure.ac
View file

@ -250,6 +250,19 @@ AC_SUBST(bzip2_bin)
AC_SUBST(bzip2_bin_test)
# Whether to use the Boehm garbage collector.
AC_ARG_ENABLE(gc, AC_HELP_STRING([--enable-gc],
[enable garbage collection in the Nix expression evaluator (requires Boehm GC)]),
gc=$enableval, gc=)
if test -n "$gc"; then
PKG_CHECK_MODULES([BDW_GC], [bdw-gc])
boehmgc_lib="-L$boehmgc/lib -lgc"
CXXFLAGS="$BDW_GC_CFLAGS $CXXFLAGS"
AC_DEFINE(HAVE_BOEHMGC, 1, [Whether to use the Boehm garbage collector.])
fi
AC_SUBST(boehmgc_lib)
AC_ARG_ENABLE(init-state, AC_HELP_STRING([--disable-init-state],
[do not initialise DB etc. in `make install']),
init_state=$enableval, init_state=yes)

11
doc/manual/env-common.xml
View file

@ -271,6 +271,17 @@ $ mount -o bind /mnt/otherdisk/nix /nix</screen>
</varlistentry>
<varlistentry><term><envar>GC_INITIAL_HEAP_SIZE</envar></term>
<listitem><para>If Nix has been configured to use the Boehm garbage
collector, this variable sets the initial size of the heap in bytes.
It defaults to 384 MiB. Setting it to a low value reduces memory
consumption, but will increase runtime due to the overhead of
garbage collection.</para></listitem>
</varlistentry>
</variablelist>

7
doc/manual/installation.xml
View file

@ -105,6 +105,13 @@ this packages. Alternatively, if you already have it installed, you
can use <command>configure</command>'s <option>--with-bzip2</option>
options to point to their respective locations.</para>
<para>Nix can optionally use the <link
xlink:href="http://www.hpl.hp.com/personal/Hans_Boehm/gc/">Boehm
garbage collector</link> to reduce the evaluator’s memory consumption.
To enable it, install <literal>pkgconfig</literal> and the Boehm
garbage collector, and pass the flag <option>--enable-gc</option> to
<command>configure</command>.</para>
</section>

21
doc/manual/release-notes.xml
View file

@ -6,6 +6,27 @@
<!--==================================================================-->
<section xml:id="ssec-relnotes-1.0"><title>Release 1.0 (TBA)</title>
<para>This release has the following improvements:</para>
<itemizedlist>
<listitem>
<para>Nix can now optionally use the Boehm garbage collector.
This significantly reduces the Nix evaluator’s memory footprint,
especially when evaluating large NixOS system configurations. It
can be enabled using the <option>--enable-gc</option> configure
option.</para>
</listitem>
</itemizedlist>
</section>
<!--==================================================================-->
<section xml:id="ssec-relnotes-0.16"><title>Release 0.16 (August 17, 2010)</title>

7
release.nix
View file

@ -18,8 +18,8 @@ let
inherit officialRelease;
buildInputs =
[ curl bison flex2533 perl libxml2 libxslt w3m bzip2
tetex dblatex nukeReferences
[ curl bison24 flex2535 perl libxml2 libxslt w3m bzip2
tetex dblatex nukeReferences pkgconfig
];
configureFlags = ''
@ -67,11 +67,12 @@ let
name = "nix";
src = tarball;
buildInputs = [ curl perl bzip2 openssl ];
buildInputs = [ curl perl bzip2 openssl pkgconfig boehmgc ];
configureFlags = ''
--disable-init-state
--with-bzip2=${bzip2}
--enable-gc
'';
};

2
src/libexpr/Makefile.am
View file

@ -11,7 +11,7 @@ pkginclude_HEADERS = \
names.hh symbol-table.hh
libexpr_la_LIBADD = ../libutil/libutil.la ../libstore/libstore.la \
../boost/format/libformat.la
../boost/format/libformat.la @boehmgc_lib@
BUILT_SOURCES = \
parser-tab.hh lexer-tab.hh parser-tab.cc lexer-tab.cc

5
src/libexpr/attr-path.cc
View file

@ -5,8 +5,9 @@
namespace nix {
// !!! Shouldn't we return a pointer to a Value?
void findAlongAttrPath(EvalState & state, const string & attrPath,
const Bindings & autoArgs, Expr * e, Value & v)
Bindings & autoArgs, Expr * e, Value & v)
{
Strings tokens = tokenizeString(attrPath, ".");
@ -48,7 +49,7 @@ void findAlongAttrPath(EvalState & state, const string & attrPath,
Bindings::iterator a = v.attrs->find(state.symbols.create(attr));
if (a == v.attrs->end())
throw Error(format("attribute `%1%' in selection path `%2%' not found") % attr % curPath);
v = a->second.value;
v = *a->value;
}
else if (apType == apIndex) {

2
src/libexpr/attr-path.hh
View file

@ -11,7 +11,7 @@ namespace nix {
void findAlongAttrPath(EvalState & state, const string & attrPath,
const Bindings & autoArgs, Expr * e, Value & v);
Bindings & autoArgs, Expr * e, Value & v);
}

12
src/libexpr/common-opts.cc
View file

@ -20,13 +20,17 @@ bool parseOptionArg(const string & arg, Strings::iterator & i,
if (i == argsEnd) throw error;
string value = *i++;
Value & v(autoArgs[state.symbols.create(name)].value);
/* !!! check for duplicates! */
Value * v = state.allocValue();
autoArgs.push_back(Attr(state.symbols.create(name), v));
if (arg == "--arg")
state.mkThunk_(v, parseExprFromString(state, value, absPath(".")));
state.mkThunk_(*v, parseExprFromString(state, value, absPath(".")));
else
mkString(v, value);
mkString(*v, value);
autoArgs.sort(); // !!! inefficient
return true;
}

391
src/libexpr/eval.cc
View file

@ -8,12 +8,43 @@
#include <cstring>
#if HAVE_BOEHMGC
#include <gc/gc.h>
#include <gc/gc_cpp.h>
#define NEW new (UseGC)
#else
#define GC_STRDUP strdup
#define GC_MALLOC malloc
#define NEW new
#endif
#define LocalNoInline(f) static f __attribute__((noinline)); f
#define LocalNoInlineNoReturn(f) static f __attribute__((noinline, noreturn)); f
namespace nix {
Bindings::iterator Bindings::find(const Symbol & name)
{
Attr key(name, 0);
iterator i = lower_bound(begin(), end(), key);
if (i != end() && i->name == name) return i;
return end();
}
void Bindings::sort()
{
std::sort(begin(), end());
}
std::ostream & operator << (std::ostream & str, const Value & v)
@ -46,7 +77,7 @@ std::ostream & operator << (std::ostream & str, const Value & v)
typedef std::map<string, Value *> Sorted;
Sorted sorted;
foreach (Bindings::iterator, i, *v.attrs)
sorted[i->first] = &i->second.value;
sorted[i->name] = i->value;
foreach (Sorted::iterator, i, sorted)
str << i->first << " = " << *i->second << "; ";
str << "}";
@ -60,7 +91,6 @@ std::ostream & operator << (std::ostream & str, const Value & v)
break;
case tThunk:
case tApp:
case tCopy:
str << "<CODE>";
break;
case tLambda:
@ -92,7 +122,6 @@ string showType(const Value & v)
case tThunk: return "a thunk";
case tApp: return "a function application";
case tLambda: return "a function";
case tCopy: return "a copy";
case tBlackhole: return "a black hole";
case tPrimOp: return "a built-in function";
case tPrimOpApp: return "a partially applied built-in function";
@ -116,6 +145,7 @@ EvalState::EvalState()
{
nrEnvs = nrValuesInEnvs = nrValues = nrListElems = 0;
nrEvaluated = recursionDepth = maxRecursionDepth = 0;
nrAttrsets = nrOpUpdates = nrOpUpdateValuesCopied = 0;
deepestStack = (char *) -1;
createBaseEnv();
@ -132,25 +162,26 @@ EvalState::~EvalState()
void EvalState::addConstant(const string & name, Value & v)
{
Value * v2 = allocValue();
*v2 = v;
staticBaseEnv.vars[symbols.create(name)] = baseEnvDispl;
baseEnv.values[baseEnvDispl++] = v;
baseEnv.values[baseEnvDispl++] = v2;
string name2 = string(name, 0, 2) == "__" ? string(name, 2) : name;
(*baseEnv.values[0].attrs)[symbols.create(name2)].value = v;
baseEnv.values[0]->attrs->push_back(Attr(symbols.create(name2), v2));
}
void EvalState::addPrimOp(const string & name,
unsigned int arity, PrimOp primOp)
unsigned int arity, PrimOpFun primOp)
{
Value v;
Value * v = allocValue();
string name2 = string(name, 0, 2) == "__" ? string(name, 2) : name;
v.type = tPrimOp;
v.primOp.arity = arity;
v.primOp.fun = primOp;
v.primOp.name = strdup(name2.c_str());
Symbol sym = symbols.create(name2);
v->type = tPrimOp;
v->primOp = NEW PrimOp(primOp, arity, sym);
staticBaseEnv.vars[symbols.create(name)] = baseEnvDispl;
baseEnv.values[baseEnvDispl++] = v;
(*baseEnv.values[0].attrs)[symbols.create(name2)].value = v;
baseEnv.values[0]->attrs->push_back(Attr(sym, v));
}
@ -218,7 +249,7 @@ LocalNoInline(void addErrorPrefix(Error & e, const char * s, const string & s2,
void mkString(Value & v, const char * s)
{
v.type = tString;
v.string.s = strdup(s);
v.string.s = GC_STRDUP(s);
v.string.context = 0;
}
@ -228,18 +259,28 @@ void mkString(Value & v, const string & s, const PathSet & context)
mkString(v, s.c_str());
if (!context.empty()) {
unsigned int n = 0;
v.string.context = new const char *[context.size() + 1];
foreach (PathSet::const_iterator, i, context)
v.string.context[n++] = strdup(i->c_str());
v.string.context = (const char * *)
GC_MALLOC((context.size() + 1) * sizeof(char *));
foreach (PathSet::const_iterator, i, context)
v.string.context[n++] = GC_STRDUP(i->c_str());
v.string.context[n] = 0;
}
}
void mkString(Value & v, const Symbol & s)
{
v.type = tString;
v.string.s = ((string) s).c_str();
v.string.context = 0;
}
void mkPath(Value & v, const char * s)
{
clearValue(v);
v.type = tPath;
v.path = strdup(s);
v.path = GC_STRDUP(s);
}
@ -249,22 +290,22 @@ 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())
return &j->second.value;
Bindings::iterator j = env->values[0]->attrs->find(var.name);
if (j != env->values[0]->attrs->end())
return j->value;
if (env->prevWith == 0)
throwEvalError("undefined variable `%1%'", var.name);
for (unsigned int l = env->prevWith; l; --l, env = env->up) ;
}
} else
return &env->values[var.displ];
return env->values[var.displ];
}
Value * EvalState::allocValues(unsigned int count)
Value * EvalState::allocValue()
{
nrValues += count;
return new Value[count]; // !!! check destructor
nrValues++;
return (Value *) GC_MALLOC(sizeof(Value));
}
@ -272,24 +313,51 @@ Env & EvalState::allocEnv(unsigned int size)
{
nrEnvs++;
nrValuesInEnvs += size;
Env * env = (Env *) malloc(sizeof(Env) + size * sizeof(Value));
Env * env = (Env *) GC_MALLOC(sizeof(Env) + size * sizeof(Value *));
/* Clear the values because maybeThunk() expects this. */
for (unsigned i = 0; i < size; ++i)
env->values[i] = 0;
return *env;
}
Value * EvalState::allocAttr(Value & vAttrs, const Symbol & name)
{
Value * v = allocValue();
vAttrs.attrs->push_back(Attr(name, v));
return v;
}
void EvalState::mkList(Value & v, unsigned int length)
{
v.type = tList;
v.list.length = length;
v.list.elems = new Value *[length];
v.list.elems = (Value * *) GC_MALLOC(length * sizeof(Value *));
nrListElems += length;
}
void EvalState::mkAttrs(Value & v)
void EvalState::mkAttrs(Value & v, unsigned int expected)
{
clearValue(v);
v.type = tAttrs;
v.attrs = new Bindings;
v.attrs = NEW Bindings;
v.attrs->reserve(expected);
nrAttrsets++;
}
unsigned long nrThunks = 0;
static inline void mkThunk(Value & v, Env & env, Expr * expr)
{
v.type = tThunk;
v.thunk.env = &env;
v.thunk.expr = expr;
nrThunks++;
}
@ -299,14 +367,28 @@ void EvalState::mkThunk_(Value & v, Expr * expr)
}
void EvalState::cloneAttrs(Value & src, Value & dst)
unsigned long nrAvoided = 0;
/* Create a thunk for the delayed computation of the given expression
in the given environment. But if the expression is a variable,
then look it up right away. This significantly reduces the number
of thunks allocated. */
Value * EvalState::maybeThunk(Env & env, Expr * expr)
{
mkAttrs(dst);
foreach (Bindings::iterator, i, *src.attrs) {
Attr & a = (*dst.attrs)[i->first];
mkCopy(a.value, i->second.value);
a.pos = i->second.pos;
ExprVar * var;
/* Ignore variables from `withs' because they can throw an
exception. */
if ((var = dynamic_cast<ExprVar *>(expr))) {
Value * v = lookupVar(&env, var->info);
/* The value might not be initialised in the environment yet.
In that case, ignore it. */
if (v) { nrAvoided++; return v; }
}
Value * v = allocValue();
mkThunk(*v, env, expr);
return v;
}
@ -404,7 +486,7 @@ void ExprInt::eval(EvalState & state, Env & env, Value & v)
void ExprString::eval(EvalState & state, Env & env, Value & v)
{
mkString(v, s.c_str());
mkString(v, s);
}
@ -416,35 +498,38 @@ void ExprPath::eval(EvalState & state, Env & env, Value & v)
void ExprAttrs::eval(EvalState & state, Env & env, Value & v)
{
state.mkAttrs(v);
state.mkAttrs(v, attrs.size());
if (recursive) {
/* Create a new environment that contains the attributes in
this `rec'. */
Env & env2(state.allocEnv(attrs.size() + inherited.size()));
Env & env2(state.allocEnv(attrs.size()));
env2.up = &env;
unsigned int displ = 0;
AttrDefs::iterator overrides = attrs.find(state.sOverrides);
bool hasOverrides = overrides != attrs.end();
/* The recursive attributes are evaluated in the new
environment. */
foreach (Attrs::iterator, i, attrs) {
nix::Attr & a = (*v.attrs)[i->first];
mkThunk(a.value, env2, i->second.first);
mkCopy(env2.values[displ++], a.value);
a.pos = &i->second.second;
}
/* The inherited attributes, on the other hand, are
evaluated in the original environment. */
foreach (list<Inherited>::iterator, i, inherited) {
nix::Attr & a = (*v.attrs)[i->first.name];
Value * v2 = state.lookupVar(&env, i->first);
mkCopy(a.value, *v2);
mkCopy(env2.values[displ++], *v2);
a.pos = &i->second;
}
environment, while the inherited attributes are evaluated
in the original environment. */
unsigned int displ = 0;
foreach (AttrDefs::iterator, i, attrs)
if (i->second.inherited) {
/* !!! handle overrides? */
Value * vAttr = state.lookupVar(&env, i->second.var);
env2.values[displ++] = vAttr;
v.attrs->push_back(Attr(i->first, vAttr, &i->second.pos));
} else {
Value * vAttr;
if (hasOverrides) {
vAttr = state.allocValue();
mkThunk(*vAttr, env2, i->second.e);
} else
vAttr = state.maybeThunk(env2, i->second.e);
env2.values[displ++] = vAttr;
v.attrs->push_back(Attr(i->first, vAttr, &i->second.pos));
}
/* If the rec contains an attribute called `__overrides', then
evaluate it, and add the attributes in that set to the rec.
This allows overriding of recursive attributes, which is
@ -453,28 +538,27 @@ void ExprAttrs::eval(EvalState & state, Env & env, Value & v)
still reference the original value, because that value has
been substituted into the bodies of the other attributes.
Hence we need __overrides.) */
Bindings::iterator overrides = v.attrs->find(state.sOverrides);
if (overrides != v.attrs->end()) {
state.forceAttrs(overrides->second.value);
foreach (Bindings::iterator, i, *overrides->second.value.attrs) {
nix::Attr & a = (*v.attrs)[i->first];
mkCopy(a.value, i->second.value);
if (hasOverrides) {
Value * vOverrides = (*v.attrs)[overrides->second.displ].value;
state.forceAttrs(*vOverrides);
foreach (Bindings::iterator, i, *vOverrides->attrs) {
AttrDefs::iterator j = attrs.find(i->name);
if (j != attrs.end()) {
(*v.attrs)[j->second.displ] = *i;
env2.values[j->second.displ] = i->value;
} else
v.attrs->push_back(*i);
}
v.attrs->sort();
}
}
else {
foreach (Attrs::iterator, i, attrs) {
nix::Attr & a = (*v.attrs)[i->first];
mkThunk(a.value, env, i->second.first);
a.pos = &i->second.second;
}
foreach (list<Inherited>::iterator, i, inherited) {
nix::Attr & a = (*v.attrs)[i->first.name];
mkCopy(a.value, *state.lookupVar(&env, i->first));
a.pos = &i->second;
}
foreach (AttrDefs::iterator, i, attrs)
if (i->second.inherited)
v.attrs->push_back(Attr(i->first, state.lookupVar(&env, i->second.var), &i->second.pos));
else
v.attrs->push_back(Attr(i->first, state.maybeThunk(env, i->second.e), &i->second.pos));
}
}
@ -483,20 +567,18 @@ void ExprLet::eval(EvalState & state, Env & env, Value & v)
{
/* Create a new environment that contains the attributes in this
`let'. */
Env & env2(state.allocEnv(attrs->attrs.size() + attrs->inherited.size()));
Env & env2(state.allocEnv(attrs->attrs.size()));
env2.up = &env;
unsigned int displ = 0;
/* The recursive attributes are evaluated in the new
/* The recursive attributes are evaluated in the new environment,
while the inherited attributes are evaluated in the original
environment. */
foreach (ExprAttrs::Attrs::iterator, i, attrs->attrs)
mkThunk(env2.values[displ++], env2, i->second.first);
/* The inherited attributes, on the other hand, are evaluated in
the original environment. */
foreach (list<ExprAttrs::Inherited>::iterator, i, attrs->inherited)
mkCopy(env2.values[displ++], *state.lookupVar(&env, i->first));
unsigned int displ = 0;
foreach (ExprAttrs::AttrDefs::iterator, i, attrs->attrs)
if (i->second.inherited)
env2.values[displ++] = state.lookupVar(&env, i->second.var);
else
env2.values[displ++] = state.maybeThunk(env2, i->second.e);
state.eval(env2, body, v);
}
@ -505,11 +587,8 @@ void ExprLet::eval(EvalState & state, Env & env, Value & v)
void ExprList::eval(EvalState & state, Env & env, Value & v)
{
state.mkList(v, elems.size());
Value * vs = state.allocValues(v.list.length);
for (unsigned int n = 0; n < v.list.length; ++n) {
v.list.elems[n] = &vs[n];
mkThunk(vs[n], env, elems[n]);
}
for (unsigned int n = 0; n < v.list.length; ++n)
v.list.elems[n] = state.maybeThunk(env, elems[n]);
}
@ -521,21 +600,26 @@ void ExprVar::eval(EvalState & state, Env & env, Value & v)
}
unsigned long nrLookups = 0;
unsigned long nrLookupSize = 0;
void ExprSelect::eval(EvalState & state, Env & env, Value & v)
{
nrLookups++;
Value v2;
state.evalAttrs(env, e, v2);
nrLookupSize += v2.attrs->size();
Bindings::iterator i = v2.attrs->find(name);
if (i == v2.attrs->end())
throwEvalError("attribute `%1%' missing", name);
try {
state.forceValue(i->second.value);
state.forceValue(*i->value);
} catch (Error & e) {
addErrorPrefix(e, "while evaluating the attribute `%1%' at %2%:\n",
name, *i->second.pos);
name, *i->pos);
throw;
}
v = i->second.value;
v = *i->value;
}
@ -559,24 +643,27 @@ void ExprApp::eval(EvalState & state, Env & env, Value & v)
{
Value vFun;
state.eval(env, e1, vFun);
Value vArg;
mkThunk(vArg, env, e2); // !!! should this be on the heap?
state.callFunction(vFun, vArg, v);
state.callFunction(vFun, *state.maybeThunk(env, e2), v);
}
void EvalState::callFunction(Value & fun, Value & arg, Value & v)
{
if (fun.type == tPrimOp || fun.type == tPrimOpApp) {
unsigned int argsLeft =
fun.type == tPrimOp ? fun.primOp.arity : fun.primOpApp.argsLeft;
/* Figure out the number of arguments still needed. */
unsigned int argsDone = 0;
Value * primOp = &fun;
while (primOp->type == tPrimOpApp) {
argsDone++;
primOp = primOp->primOpApp.left;
}
assert(primOp->type == tPrimOp);
unsigned int arity = primOp->primOp->arity;
unsigned int argsLeft = arity - argsDone;
if (argsLeft == 1) {
/* We have all the arguments, so call the primop. First
find the primop. */
Value * primOp = &fun;
while (primOp->type == tPrimOpApp) primOp = primOp->primOpApp.left;
assert(primOp->type == tPrimOp);
unsigned int arity = primOp->primOp.arity;
/* We have all the arguments, so call the primop. */
/* Put all the arguments in an array. */
Value * vArgs[arity];
@ -587,19 +674,16 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v)
/* And call the primop. */
try {
primOp->primOp.fun(*this, vArgs, v);
primOp->primOp->fun(*this, vArgs, v);
} catch (Error & e) {
addErrorPrefix(e, "while evaluating the builtin function `%1%':\n", primOp->primOp.name);
addErrorPrefix(e, "while evaluating the builtin function `%1%':\n", primOp->primOp->name);
throw;
}
} else {
Value * v2 = allocValues(2);
v2[0] = fun;
v2[1] = arg;
v.type = tPrimOpApp;
v.primOpApp.left = &v2[0];
v.primOpApp.right = &v2[1];
v.primOpApp.argsLeft = argsLeft - 1;
v.primOpApp.left = allocValue();
*v.primOpApp.left = fun;
v.primOpApp.right = &arg;
}
return;
}
@ -617,13 +701,13 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v)
unsigned int displ = 0;
if (!fun.lambda.fun->matchAttrs)
env2.values[displ++] = arg;
env2.values[displ++] = &arg;
else {
forceAttrs(arg);
if (!fun.lambda.fun->arg.empty())
env2.values[displ++] = arg;
env2.values[displ++] = &arg;
/* For each formal argument, get the actual argument. If
there is no matching actual argument but the formal
@ -633,11 +717,11 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v)
Bindings::iterator j = arg.attrs->find(i->name);
if (j == arg.attrs->end()) {
if (!i->def) throwTypeError("function at %1% called without required argument `%2%'",
fun.lambda.fun->pos, i->name);
mkThunk(env2.values[displ++], env2, i->def);
fun.lambda.fun->pos, i->name);
env2.values[displ++] = maybeThunk(env2, i->def);
} else {
attrsUsed++;
mkCopy(env2.values[displ++], j->second.value);
env2.values[displ++] = j->value;
}
}
@ -645,7 +729,7 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v)
argument (unless the attribute match specifies a `...').
TODO: show the names of the expected/unexpected
arguments. */
if (!fun.lambda.fun->formals->ellipsis && attrsUsed != arg.attrs->size())
if (!fun.lambda.fun->formals->ellipsis && attrsUsed != arg.attrs->size())
throwTypeError("function at %1% called with unexpected argument", fun.lambda.fun->pos);
}
@ -658,7 +742,7 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v)
}
void EvalState::autoCallFunction(const Bindings & args, Value & fun, Value & res)
void EvalState::autoCallFunction(Bindings & args, Value & fun, Value & res)
{
forceValue(fun);
@ -668,16 +752,18 @@ void EvalState::autoCallFunction(const Bindings & args, Value & fun, Value & res
}
Value actualArgs;
mkAttrs(actualArgs);
mkAttrs(actualArgs, fun.lambda.fun->formals->formals.size());
foreach (Formals::Formals_::iterator, i, fun.lambda.fun->formals->formals) {
Bindings::const_iterator j = args.find(i->name);
Bindings::iterator j = args.find(i->name);
if (j != args.end())
(*actualArgs.attrs)[i->name] = j->second;
actualArgs.attrs->push_back(*j);
else if (!i->def)
throwTypeError("cannot auto-call a function that has an argument without a default value (`%1%')", i->name);
}
actualArgs.attrs->sort();
callFunction(fun, actualArgs, res);
}
@ -688,7 +774,8 @@ void ExprWith::eval(EvalState & state, Env & env, Value & v)
env2.up = &env;
env2.prevWith = prevWith;
state.evalAttrs(env, attrs, env2.values[0]);
env2.values[0] = state.allocValue();
state.evalAttrs(env, attrs, *env2.values[0]);
state.eval(env2, body, v);
}
@ -754,16 +841,34 @@ void ExprOpUpdate::eval(EvalState & state, Env & env, Value & v)
state.evalAttrs(env, e1, v1);
state.evalAttrs(env, e2, v2);
state.nrOpUpdates++;
if (v1.attrs->size() == 0) { v = v2; return; }
if (v2.attrs->size() == 0) { v = v1; return; }
state.cloneAttrs(v1, v);
state.mkAttrs(v, v1.attrs->size() + v2.attrs->size());
foreach (Bindings::iterator, i, *v2.attrs) {
Attr & a = (*v.attrs)[i->first];
mkCopy(a.value, i->second.value);
a.pos = i->second.pos;
/* Merge the attribute sets, preferring values from the second
set. Make sure to keep the resulting vector in sorted
order. */
Bindings::iterator i = v1.attrs->begin();
Bindings::iterator j = v2.attrs->begin();
while (i != v1.attrs->end() && j != v2.attrs->end()) {
if (i->name == j->name) {
v.attrs->push_back(*j);
++i; ++j;
}
else if (i->name < j->name)
v.attrs->push_back(*i++);
else
v.attrs->push_back(*j++);
}
while (i != v1.attrs->end()) v.attrs->push_back(*i++);
while (j != v2.attrs->end()) v.attrs->push_back(*j++);
state.nrOpUpdateValuesCopied += v.attrs->size();
}
@ -826,10 +931,6 @@ void EvalState::forceValue(Value & v)
throw;
}
}
else if (v.type == tCopy) {
forceValue(*v.val);
v = *v.val;
}
else if (v.type == tApp)
callFunction(*v.app.left, *v.app.right, v);
else if (v.type == tBlackhole)
@ -843,7 +944,7 @@ void EvalState::strictForceValue(Value & v)
if (v.type == tAttrs) {
foreach (Bindings::iterator, i, *v.attrs)
strictForceValue(i->second.value);
strictForceValue(*i->value);
}
else if (v.type == tList) {
@ -934,7 +1035,7 @@ bool EvalState::isDerivation(Value & v)
{
if (v.type != tAttrs) return false;
Bindings::iterator i = v.attrs->find(sType);
return i != v.attrs->end() && forceStringNoCtx(i->second.value) == "derivation";
return i != v.attrs->end() && forceStringNoCtx(*i->value) == "derivation";
}
@ -978,7 +1079,7 @@ string EvalState::coerceToString(Value & v, PathSet & context,
Bindings::iterator i = v.attrs->find(sOutPath);
if (i == v.attrs->end())
throwTypeError("cannot coerce an attribute set (except a derivation) to a string");
return coerceToString(i->second.value, context, coerceMore, copyToStore);
return coerceToString(*i->value, context, coerceMore, copyToStore);
}
if (coerceMore) {
@ -1064,9 +1165,9 @@ bool EvalState::eqValues(Value & v1, Value & v2)
case tAttrs: {
if (v1.attrs->size() != v2.attrs->size()) return false;
Bindings::iterator i, j;
for (i = v1.attrs->begin(), j = v2.attrs->begin(); i != v1.attrs->end(); ++i, ++j)
if (i->first != j->first || !eqValues(i->second.value, j->second.value))
Bindings::iterator i = v1.attrs->begin(), j = v2.attrs->begin();
for ( ; i != v1.attrs->end(); ++i, ++j)
if (i->name != j->name || !eqValues(*i->value, *j->value))
return false;
return true;
}
@ -1089,20 +1190,26 @@ void EvalState::printStats()
bool showStats = getEnv("NIX_SHOW_STATS", "0") != "0";
Verbosity v = showStats ? lvlInfo : lvlDebug;
printMsg(v, "evaluation statistics:");
printMsg(v, format(" size of a value: %1%") % sizeof(Value));
printMsg(v, format(" expressions evaluated: %1%") % nrEvaluated);
printMsg(v, format(" stack space used: %1% bytes") % (&x - deepestStack));
printMsg(v, format(" max eval() nesting depth: %1%") % maxRecursionDepth);
printMsg(v, format(" stack space per eval() level: %1% bytes")
% ((&x - deepestStack) / (float) maxRecursionDepth));
printMsg(v, format(" environments allocated: %1% (%2% bytes)")
% nrEnvs % (nrEnvs * sizeof(Env)));
printMsg(v, format(" values allocated in environments: %1% (%2% bytes)")
% nrValuesInEnvs % (nrValuesInEnvs * sizeof(Value)));
% nrEnvs % (nrEnvs * sizeof(Env) + nrValuesInEnvs * sizeof(Value *)));
printMsg(v, format(" list elements: %1% (%2% bytes)")
% nrListElems % (nrListElems * sizeof(Value *)));
printMsg(v, format(" misc. values allocated: %1% (%2% bytes)")
printMsg(v, format(" values allocated: %1% (%2% bytes)")
% nrValues % (nrValues * sizeof(Value)));
printMsg(v, format(" attribute sets allocated: %1%") % nrAttrsets);
printMsg(v, format(" right-biased unions: %1%") % nrOpUpdates);
printMsg(v, format(" values copied in right-biased unions: %1%") % nrOpUpdateValuesCopied);
printMsg(v, format(" symbols in symbol table: %1%") % symbols.size());
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(" attr lookup size: %1%") % nrLookupSize);
}

100
src/libexpr/eval.hh
View file

@ -7,6 +7,10 @@
#include <map>
#if HAVE_BOEHMGC
#include <gc/gc_allocator.h>
#endif
namespace nix {
@ -16,7 +20,22 @@ struct Env;
struct Value;
struct Attr;
typedef std::map<Symbol, Attr> Bindings;
/* Attribute sets are represented as a vector of attributes, sorted by
symbol (i.e. pointer to the attribute name in the symbol table). */
#if HAVE_BOEHMGC
typedef std::vector<Attr, gc_allocator<Attr> > BindingsBase;
#else
typedef std::vector<Attr> BindingsBase;
#endif
class Bindings : public BindingsBase
{
public:
iterator find(const Symbol & name);
void sort();
};
typedef enum {
@ -30,14 +49,23 @@ typedef enum {
tThunk,
tApp,
tLambda,
tCopy,
tBlackhole,
tPrimOp,
tPrimOpApp,
} ValueType;
typedef void (* PrimOp) (EvalState & state, Value * * args, Value & v);
typedef void (* PrimOpFun) (EvalState & state, Value * * args, Value & v);
struct PrimOp
{
PrimOpFun fun;
unsigned int arity;
Symbol name;
PrimOp(PrimOpFun fun, unsigned int arity, Symbol name)
: fun(fun), arity(arity), name(name) { }
};
struct Value
@ -90,15 +118,9 @@ struct Value
Env * env;
ExprLambda * fun;
} lambda;
Value * val;
struct {
PrimOp fun;
char * name;
unsigned int arity;
} primOp;
PrimOp * primOp;
struct {
Value * left, * right;
unsigned int argsLeft;
} primOpApp;
};
};
@ -108,20 +130,36 @@ struct Env
{
Env * up;
unsigned int prevWith; // nr of levels up to next `with' environment
Value values[0];
Value * values[0];
};
struct Attr
{
Value value;
Symbol name;
Value * value;
Pos * pos;
Attr(Symbol name, Value * value, Pos * pos = &noPos)
: name(name), value(value), pos(pos) { };
Attr() : pos(&noPos) { };
bool operator < (const Attr & a) const
{
return name < a.name;
}
};
/* After overwriting an app node, be sure to clear pointers in the
Value to ensure that the target isn't kept alive unnecessarily. */
static inline void clearValue(Value & v)
{
v.app.right = 0;
}
static inline void mkInt(Value & v, int n)
{
clearValue(v);
v.type = tInt;
v.integer = n;
}
@ -129,26 +167,12 @@ static inline void mkInt(Value & v, int n)
static inline void mkBool(Value & v, bool b)
{
clearValue(v);
v.type = tBool;
v.boolean = b;
}
static inline void mkThunk(Value & v, Env & env, Expr * expr)
{
v.type = tThunk;
v.thunk.env = &env;
v.thunk.expr = expr;
}
static inline void mkCopy(Value & v, Value & src)
{
v.type = tCopy;
v.val = &src;
}
static inline void mkApp(Value & v, Value & left, Value & right)
{
v.type = tApp;
@ -268,7 +292,7 @@ private:
void addConstant(const string & name, Value & v);
void addPrimOp(const string & name,
unsigned int arity, PrimOp primOp);
unsigned int arity, PrimOpFun primOp);
Value * lookupVar(Env * env, const VarRef & var);
@ -286,18 +310,20 @@ public:
/* Automatically call a function for which each argument has a
default value or has a binding in the `args' map. */
void autoCallFunction(const Bindings & args, Value & fun, Value & res);
void autoCallFunction(Bindings & args, Value & fun, Value & res);
/* Allocation primitives. */
Value * allocValues(unsigned int count);
Value * allocValue();
Env & allocEnv(unsigned int size);
void mkList(Value & v, unsigned int length);
void mkAttrs(Value & v);
void mkThunk_(Value & v, Expr * expr);
void cloneAttrs(Value & src, Value & dst);
Value * allocAttr(Value & vAttrs, const Symbol & name);
void mkList(Value & v, unsigned int length);
void mkAttrs(Value & v, unsigned int expected);
void mkThunk_(Value & v, Expr * expr);
Value * maybeThunk(Env & env, Expr * expr);
/* Print statistics. */
void printStats();
@ -308,11 +334,15 @@ private:
unsigned long nrValues;
unsigned long nrListElems;
unsigned long nrEvaluated;
unsigned long nrAttrsets;
unsigned long nrOpUpdates;
unsigned long nrOpUpdateValuesCopied;
unsigned int recursionDepth;
unsigned int maxRecursionDepth;
char * deepestStack; /* for measuring stack usage */
friend class RecursionCounter;
friend class ExprOpUpdate;
};

44
src/libexpr/get-drvs.cc
View file

@ -10,7 +10,7 @@ string DrvInfo::queryDrvPath(EvalState & state) const
if (drvPath == "" && attrs) {
Bindings::iterator i = attrs->find(state.sDrvPath);
PathSet context;
(string &) drvPath = i != attrs->end() ? state.coerceToPath(i->second.value, context) : "";
(string &) drvPath = i != attrs->end() ? state.coerceToPath(*i->value, context) : "";
}
return drvPath;
}
@ -21,7 +21,7 @@ string DrvInfo::queryOutPath(EvalState & state) const
if (outPath == "" && attrs) {
Bindings::iterator i = attrs->find(state.sOutPath);
PathSet context;
(string &) outPath = i != attrs->end() ? state.coerceToPath(i->second.value, context) : "";
(string &) outPath = i != attrs->end() ? state.coerceToPath(*i->value, context) : "";
}
return outPath;
}
@ -36,23 +36,23 @@ MetaInfo DrvInfo::queryMetaInfo(EvalState & state) const
Bindings::iterator a = attrs->find(state.sMeta);
if (a == attrs->end()) return meta; /* fine, empty meta information */
state.forceAttrs(a->second.value);
state.forceAttrs(*a->value);
foreach (Bindings::iterator, i, *a->second.value.attrs) {
foreach (Bindings::iterator, i, *a->value->attrs) {
MetaValue value;
state.forceValue(i->second.value);
if (i->second.value.type == tString) {
state.forceValue(*i->value);
if (i->value->type == tString) {
value.type = MetaValue::tpString;
value.stringValue = i->second.value.string.s;
} else if (i->second.value.type == tInt) {
value.stringValue = i->value->string.s;
} else if (i->value->type == tInt) {
value.type = MetaValue::tpInt;
value.intValue = i->second.value.integer;
} else if (i->second.value.type == tList) {
value.intValue = i->value->integer;
} else if (i->value->type == tList) {
value.type = MetaValue::tpStrings;
for (unsigned int j = 0; j < i->second.value.list.length; ++j)
value.stringValues.push_back(state.forceStringNoCtx(*i->second.value.list.elems[j]));
for (unsigned int j = 0; j < i->value->list.length; ++j)
value.stringValues.push_back(state.forceStringNoCtx(*i->value->list.elems[j]));
} else continue;
((MetaInfo &) meta)[i->first] = value;
((MetaInfo &) meta)[i->name] = value;
}
return meta;
@ -99,13 +99,13 @@ static bool getDerivation(EvalState & state, Value & v,
Bindings::iterator i = v.attrs->find(state.sName);
/* !!! We really would like to have a decent back trace here. */
if (i == v.attrs->end()) throw TypeError("derivation name missing");
drv.name = state.forceStringNoCtx(i->second.value);
drv.name = state.forceStringNoCtx(*i->value);
i = v.attrs->find(state.sSystem);
if (i == v.attrs->end())
Bindings::iterator i2 = v.attrs->find(state.sSystem);
if (i2 == v.attrs->end())
drv.system = "unknown";
else
drv.system = state.forceStringNoCtx(i->second.value);
drv.system = state.forceStringNoCtx(*i2->value);
drv.attrs = v.attrs;
@ -138,7 +138,7 @@ static string addToPath(const string & s1, const string & s2)
static void getDerivations(EvalState & state, Value & vIn,
const string & pathPrefix, const Bindings & autoArgs,
const string & pathPrefix, Bindings & autoArgs,
DrvInfos & drvs, Done & done)
{
Value v;
@ -163,12 +163,12 @@ static void getDerivations(EvalState & state, Value & vIn,
typedef std::map<string, Symbol> SortedSymbols;
SortedSymbols attrs;
foreach (Bindings::iterator, i, *v.attrs)
attrs.insert(std::pair<string, Symbol>(i->first, i->first));
attrs.insert(std::pair<string, Symbol>(i->name, i->name));
foreach (SortedSymbols::iterator, i, attrs) {
startNest(nest, lvlDebug, format("evaluating attribute `%1%'") % i->first);
string pathPrefix2 = addToPath(pathPrefix, i->first);
Value & v2((*v.attrs)[i->second].value);
Value & v2(*v.attrs->find(i->second)->value);
if (combineChannels)
getDerivations(state, v2, pathPrefix2, autoArgs, drvs, done);
else if (getDerivation(state, v2, pathPrefix2, drvs, done)) {
@ -178,7 +178,7 @@ static void getDerivations(EvalState & state, Value & vIn,
attribute. */
if (v2.type == tAttrs) {
Bindings::iterator j = v2.attrs->find(state.symbols.create("recurseForDerivations"));
if (j != v2.attrs->end() && state.forceBool(j->second.value))
if (j != v2.attrs->end() && state.forceBool(*j->value))
getDerivations(state, v2, pathPrefix2, autoArgs, drvs, done);
}
}
@ -200,7 +200,7 @@ static void getDerivations(EvalState & state, Value & vIn,
void getDerivations(EvalState & state, Value & v, const string & pathPrefix,
const Bindings & autoArgs, DrvInfos & drvs)
Bindings & autoArgs, DrvInfos & drvs)
{
Done done;
getDerivations(state, v, pathPrefix, autoArgs, drvs, done);

2
src/libexpr/get-drvs.hh
View file

@ -70,7 +70,7 @@ typedef list<DrvInfo> DrvInfos;
bool getDerivation(EvalState & state, Value & v, DrvInfo & drv);
void getDerivations(EvalState & state, Value & v, const string & pathPrefix,
const Bindings & autoArgs, DrvInfos & drvs);
Bindings & autoArgs, DrvInfos & drvs);
}

8
src/libexpr/lexer.l
View file

@ -46,7 +46,7 @@ static void adjustLoc(YYLTYPE * loc, const char * s, size_t len)
}
static Expr * unescapeStr(const char * s)
static Expr * unescapeStr(SymbolTable & symbols, const char * s)
{
string t;
char c;
@ -66,7 +66,7 @@ static Expr * unescapeStr(const char * s)
}
else t += c;
}
return new ExprString(t);
return new ExprString(symbols.create(t));
}
@ -119,7 +119,7 @@ inherit { return INHERIT; }
"$\"" will be consumed as part of a string, rather
than a "$" followed by the string terminator.
Disallow "$\"" for now. */
yylval->e = unescapeStr(yytext);
yylval->e = unescapeStr(data->symbols, yytext);
return STR;
}
<STRING>\$\{ { BEGIN(INITIAL); return DOLLAR_CURLY; }
@ -140,7 +140,7 @@ inherit { return INHERIT; }
return IND_STR;
}
<IND_STRING>\'\'\\. {
yylval->e = unescapeStr(yytext + 2);
yylval->e = unescapeStr(data->symbols, yytext + 2);
return IND_STR;
}
<IND_STRING>\$\{ { BEGIN(INITIAL); return DOLLAR_CURLY; }

63
src/libexpr/nixexpr.cc
View file

@ -55,10 +55,11 @@ void ExprAttrs::show(std::ostream & str)
{
if (recursive) str << "rec ";
str << "{ ";
foreach (list<Inherited>::iterator, i, inherited)
str << "inherit " << i->first.name << "; ";
foreach (Attrs::iterator, i, attrs)
str << i->first << " = " << *i->second.first << "; ";
foreach (AttrDefs::iterator, i, attrs)
if (i->second.inherited)
str << "inherit " << i->first << " " << "; ";
else
str << i->first << " = " << *i->second.e << "; ";
str << "}";
}
@ -91,10 +92,11 @@ void ExprLambda::show(std::ostream & str)
void ExprLet::show(std::ostream & str)
{
str << "let ";
foreach (list<ExprAttrs::Inherited>::iterator, i, attrs->inherited)
str << "inherit " << i->first.name << "; ";
foreach (ExprAttrs::Attrs::iterator, i, attrs->attrs)
str << i->first << " = " << *i->second.first << "; ";
foreach (ExprAttrs::AttrDefs::iterator, i, attrs->attrs)
if (i->second.inherited)
str << "inherit " << i->first << "; ";
else
str << i->first << " = " << *i->second.e << "; ";
str << "in " << *body;
}
@ -211,26 +213,18 @@ void ExprAttrs::bindVars(const StaticEnv & env)
StaticEnv newEnv(false, &env);
unsigned int displ = 0;
foreach (ExprAttrs::Attrs::iterator, i, attrs)
newEnv.vars[i->first] = displ++;
foreach (list<Inherited>::iterator, i, inherited) {
newEnv.vars[i->first.name] = displ++;
i->first.bind(env);
}
foreach (ExprAttrs::Attrs::iterator, i, attrs)
i->second.first->bindVars(newEnv);
foreach (AttrDefs::iterator, i, attrs)
newEnv.vars[i->first] = i->second.displ = displ++;
foreach (AttrDefs::iterator, i, attrs)
if (i->second.inherited) i->second.var.bind(env);
else i->second.e->bindVars(newEnv);
}
else {
foreach (ExprAttrs::Attrs::iterator, i, attrs)
i->second.first->bindVars(env);
foreach (list<Inherited>::iterator, i, inherited)
i->first.bind(env);
}
else
foreach (AttrDefs::iterator, i, attrs)
if (i->second.inherited) i->second.var.bind(env);
else i->second.e->bindVars(env);
}
void ExprList::bindVars(const StaticEnv & env)
@ -263,17 +257,12 @@ void ExprLet::bindVars(const StaticEnv & env)
StaticEnv newEnv(false, &env);
unsigned int displ = 0;
foreach (ExprAttrs::Attrs::iterator, i, attrs->attrs)
newEnv.vars[i->first] = displ++;
foreach (list<ExprAttrs::Inherited>::iterator, i, attrs->inherited) {
newEnv.vars[i->first.name] = displ++;
i->first.bind(env);
}
foreach (ExprAttrs::Attrs::iterator, i, attrs->attrs)
i->second.first->bindVars(newEnv);
foreach (ExprAttrs::AttrDefs::iterator, i, attrs->attrs)
newEnv.vars[i->first] = i->second.displ = displ++;
foreach (ExprAttrs::AttrDefs::iterator, i, attrs->attrs)
if (i->second.inherited) i->second.var.bind(env);
else i->second.e->bindVars(newEnv);
body->bindVars(newEnv);
}

23
src/libexpr/nixexpr.hh
View file

@ -65,8 +65,8 @@ struct ExprInt : Expr
struct ExprString : Expr
{
string s;
ExprString(const string & s) : s(s) { };
Symbol s;
ExprString(const Symbol & s) : s(s) { };
COMMON_METHODS
};
@ -101,6 +101,7 @@ struct VarRef
unsigned int level;
unsigned int displ;
VarRef() { };
VarRef(const Symbol & name) : name(name) { };
void bind(const StaticEnv & env);
};
@ -131,12 +132,18 @@ struct ExprOpHasAttr : Expr
struct ExprAttrs : Expr
{
bool recursive;
typedef std::pair<Expr *, Pos> Attr;
typedef std::pair<VarRef, Pos> Inherited;
typedef std::map<Symbol, Attr> Attrs;
Attrs attrs;
list<Inherited> inherited;
std::map<Symbol, Pos> attrNames; // used during parsing
struct AttrDef {
bool inherited;
Expr * e; // if not inherited
VarRef var; // if inherited
Pos pos;
unsigned int displ; // displacement
AttrDef(Expr * e, const Pos & pos) : inherited(false), e(e), pos(pos) { };
AttrDef(const Symbol & name, const Pos & pos) : inherited(true), var(name), pos(pos) { };
AttrDef() { };
};
typedef std::map<Symbol, AttrDef> AttrDefs;
AttrDefs attrs;
ExprAttrs() : recursive(false) { };
COMMON_METHODS
};

104
src/libexpr/parser.y
View file

@ -7,19 +7,44 @@
%parse-param { yyscan_t scanner }
%parse-param { ParseData * data }
%lex-param { yyscan_t scanner }
%lex-param { ParseData * data }
%{
/* Newer versions of Bison copy the declarations below to
parser-tab.hh, which sucks bigtime since lexer.l doesn't want that
stuff. So allow it to be excluded. */
#ifndef BISON_HEADER_HACK
#define BISON_HEADER_HACK
%code requires {
#ifndef BISON_HEADER
#define BISON_HEADER
#include "util.hh"
#include "nixexpr.hh"
namespace nix {
struct ParseData
{
SymbolTable & symbols;
Expr * result;
Path basePath;
Path path;
string error;
Symbol sLetBody;
ParseData(SymbolTable & symbols)
: symbols(symbols)
, sLetBody(symbols.create("<let-body>"))
{ };
};
}
#define YY_DECL int yylex \
(YYSTYPE * yylval_param, YYLTYPE * yylloc_param, yyscan_t yyscanner, nix::ParseData * data)
#endif
}
%{
#include "parser-tab.hh"
#include "lexer-tab.hh"
#define YYSTYPE YYSTYPE // workaround a bug in Bison 2.4
@ -28,27 +53,13 @@
#include <stdlib.h>
#include <string.h>
YY_DECL;
using namespace nix;
namespace nix {
struct ParseData
{
SymbolTable & symbols;
Expr * result;
Path basePath;
Path path;
string error;
Symbol sLetBody;
ParseData(SymbolTable & symbols)
: symbols(symbols)
, sLetBody(symbols.create("<let-body>"))
{ };
};
static string showAttrPath(const vector<Symbol> & attrPath)
{
@ -82,20 +93,20 @@ static void addAttr(ExprAttrs * attrs, const vector<Symbol> & attrPath,
unsigned int n = 0;
foreach (vector<Symbol>::const_iterator, i, attrPath) {
n++;
ExprAttrs::Attrs::iterator j = attrs->attrs.find(*i);
ExprAttrs::AttrDefs::iterator j = attrs->attrs.find(*i);
if (j != attrs->attrs.end()) {
ExprAttrs * attrs2 = dynamic_cast<ExprAttrs *>(j->second.first);
if (!attrs2 || n == attrPath.size()) dupAttr(attrPath, pos, j->second.second);
attrs = attrs2;
if (!j->second.inherited) {
ExprAttrs * attrs2 = dynamic_cast<ExprAttrs *>(j->second.e);
if (!attrs2 || n == attrPath.size()) dupAttr(attrPath, pos, j->second.pos);
attrs = attrs2;
} else
dupAttr(attrPath, pos, j->second.pos);
} else {
if (attrs->attrNames.find(*i) != attrs->attrNames.end())
dupAttr(attrPath, pos, attrs->attrNames[*i]);
attrs->attrNames[*i] = pos;
if (n == attrPath.size())
attrs->attrs[*i] = ExprAttrs::Attr(e, pos);
attrs->attrs[*i] = ExprAttrs::AttrDef(e, pos);
else {
ExprAttrs * nested = new ExprAttrs;
attrs->attrs[*i] = ExprAttrs::Attr(nested, pos);
attrs->attrs[*i] = ExprAttrs::AttrDef(nested, pos);
attrs = nested;
}
}
@ -113,9 +124,9 @@ static void addFormal(const Pos & pos, Formals * formals, const Formal & formal)
}
static Expr * stripIndentation(vector<Expr *> & es)
static Expr * stripIndentation(SymbolTable & symbols, vector<Expr *> & es)
{
if (es.empty()) return new ExprString("");
if (es.empty()) return new ExprString(symbols.create(""));
/* Figure out the minimum indentation. Note that by design
whitespace-only final lines are not taken into account. (So
@ -195,7 +206,7 @@ static Expr * stripIndentation(vector<Expr *> & es)
s2 = string(s2, 0, p + 1);
}
es2->push_back(new ExprString(s2));
es2->push_back(new ExprString(symbols.create(s2)));
}
return new ExprConcatStrings(es2);
@ -224,9 +235,6 @@ void yyerror(YYLTYPE * loc, yyscan_t scanner, ParseData * data, const char * err
}
#endif
%}
%union {
@ -337,15 +345,15 @@ expr_simple
| INT { $$ = new ExprInt($1); }
| '"' string_parts '"' {
/* For efficiency, and to simplify parse trees a bit. */
if ($2->empty()) $$ = new ExprString("");
if ($2->empty()) $$ = new ExprString(data->symbols.create(""));
else if ($2->size() == 1) $$ = $2->front();
else $$ = new ExprConcatStrings($2);
}
| IND_STRING_OPEN ind_string_parts IND_STRING_CLOSE {
$$ = stripIndentation(*$2);
$$ = stripIndentation(data->symbols, *$2);
}
| PATH { $$ = new ExprPath(absPath($1, data->basePath)); }
| URI { $$ = new ExprString($1); }
| URI { $$ = new ExprString(data->symbols.create($1)); }
| '(' expr ')' { $$ = $2; }
/* Let expressions `let {..., body = ...}' are just desugared
into `(rec {..., body = ...}).body'. */
@ -375,21 +383,19 @@ binds
| binds INHERIT ids ';'
{ $$ = $1;
foreach (vector<Symbol>::iterator, i, *$3) {
if ($$->attrNames.find(*i) != $$->attrNames.end())
dupAttr(*i, makeCurPos(@3, data), $$->attrNames[*i]);
if ($$->attrs.find(*i) != $$->attrs.end())
dupAttr(*i, makeCurPos(@3, data), $$->attrs[*i].pos);
Pos pos = makeCurPos(@3, data);
$$->inherited.push_back(ExprAttrs::Inherited(*i, pos));
$$->attrNames[*i] = pos;
$$->attrs[*i] = ExprAttrs::AttrDef(*i, pos);
}
}
| binds INHERIT '(' expr ')' ids ';'
{ $$ = $1;
/* !!! Should ensure sharing of the expression in $4. */
foreach (vector<Symbol>::iterator, i, *$6) {
if ($$->attrNames.find(*i) != $$->attrNames.end())
dupAttr(*i, makeCurPos(@6, data), $$->attrNames[*i]);
$$->attrs[*i] = ExprAttrs::Attr(new ExprSelect($4, *i), makeCurPos(@6, data));
$$->attrNames[*i] = makeCurPos(@6, data);
if ($$->attrs.find(*i) != $$->attrs.end())
dupAttr(*i, makeCurPos(@6, data), $$->attrs[*i].pos);
$$->attrs[*i] = ExprAttrs::AttrDef(new ExprSelect($4, *i), makeCurPos(@6, data));
}}
| { $$ = new ExprAttrs; }

161
src/libexpr/primops.cc
View file

@ -119,24 +119,24 @@ static void prim_genericClosure(EvalState & state, Value * * args, Value & v)
args[0]->attrs->find(state.symbols.create("startSet"));
if (startSet == args[0]->attrs->end())
throw EvalError("attribute `startSet' required");
state.forceList(startSet->second.value);
state.forceList(*startSet->value);
list<Value *> workSet;
for (unsigned int n = 0; n < startSet->second.value.list.length; ++n)
workSet.push_back(startSet->second.value.list.elems[n]);
for (unsigned int n = 0; n < startSet->value->list.length; ++n)
workSet.push_back(startSet->value->list.elems[n]);
/* Get the operator. */
Bindings::iterator op =
args[0]->attrs->find(state.symbols.create("operator"));
if (op == args[0]->attrs->end())
throw EvalError("attribute `operator' required");
state.forceValue(op->second.value);
state.forceValue(*op->value);
/* Construct the closure by applying the operator to element of
`workSet', adding the result to `workSet', continuing until
no new elements are found. */
list<Value> res;
set<Value, CompareValues> doneKeys;
set<Value, CompareValues> doneKeys; // !!! use Value *?
while (!workSet.empty()) {
Value * e = *(workSet.begin());
workSet.pop_front();
@ -147,15 +147,15 @@ static void prim_genericClosure(EvalState & state, Value * * args, Value & v)
e->attrs->find(state.symbols.create("key"));
if (key == e->attrs->end())
throw EvalError("attribute `key' required");
state.forceValue(key->second.value);
state.forceValue(*key->value);
if (doneKeys.find(key->second.value) != doneKeys.end()) continue;
doneKeys.insert(key->second.value);
if (doneKeys.find(*key->value) != doneKeys.end()) continue;
doneKeys.insert(*key->value);
res.push_back(*e);
/* Call the `operator' function with `e' as argument. */
Value call;
mkApp(call, op->second.value, *e);
mkApp(call, *op->value, *e);
state.forceList(call);
/* Add the values returned by the operator to the work set. */
@ -167,13 +167,9 @@ static void prim_genericClosure(EvalState & state, Value * * args, Value & v)
/* Create the result list. */
state.mkList(v, res.size());
Value * vs = state.allocValues(res.size());
unsigned int n = 0;
foreach (list<Value>::iterator, i, res) {
v.list.elems[n] = &vs[n];
vs[n++] = *i;
}
foreach (list<Value>::iterator, i, res)
*(v.list.elems[n++] = state.allocValue()) = *i;
}
@ -210,15 +206,16 @@ static void prim_addErrorContext(EvalState & state, Value * * args, Value & v)
* else => {success=false; value=false;} */
static void prim_tryEval(EvalState & state, Value * * args, Value & v)
{
state.mkAttrs(v);
state.mkAttrs(v, 2);
try {
state.forceValue(*args[0]);
(*v.attrs)[state.symbols.create("value")].value = *args[0];
mkBool((*v.attrs)[state.symbols.create("success")].value, true);
v.attrs->push_back(Attr(state.symbols.create("value"), args[0]));
mkBool(*state.allocAttr(v, state.symbols.create("success")), true);
} catch (AssertionError & e) {
mkBool((*v.attrs)[state.symbols.create("value")].value, false);
mkBool((*v.attrs)[state.symbols.create("success")].value, false);
mkBool(*state.allocAttr(v, state.symbols.create("value")), false);
mkBool(*state.allocAttr(v, state.symbols.create("success")), false);
}
v.attrs->sort();
}
@ -324,9 +321,9 @@ static void prim_derivationStrict(EvalState & state, Value * * args, Value & v)
if (attr == args[0]->attrs->end())
throw EvalError("required attribute `name' missing");
string drvName;
Pos & posDrvName(*attr->second.pos);
Pos & posDrvName(*attr->pos);
try {
drvName = state.forceStringNoCtx(attr->second.value);
drvName = state.forceStringNoCtx(*attr->value);
} catch (Error & e) {
e.addPrefix(format("while evaluating the derivation attribute `name' at %1%:\n") % posDrvName);
throw;
@ -341,7 +338,7 @@ static void prim_derivationStrict(EvalState & state, Value * * args, Value & v)
bool outputHashRecursive = false;
foreach (Bindings::iterator, i, *args[0]->attrs) {
string key = i->first;
string key = i->name;
startNest(nest, lvlVomit, format("processing attribute `%1%'") % key);
try {
@ -349,9 +346,9 @@ static void prim_derivationStrict(EvalState & state, Value * * args, Value & v)
/* The `args' attribute is special: it supplies the
command-line arguments to the builder. */
if (key == "args") {
state.forceList(i->second.value);
for (unsigned int n = 0; n < i->second.value.list.length; ++n) {
string s = state.coerceToString(*i->second.value.list.elems[n], context, true);
state.forceList(*i->value);
for (unsigned int n = 0; n < i->value->list.length; ++n) {
string s = state.coerceToString(*i->value->list.elems[n], context, true);
drv.args.push_back(s);
}
}
@ -359,11 +356,11 @@ static void prim_derivationStrict(EvalState & state, Value * * args, Value & v)
/* All other attributes are passed to the builder through
the environment. */
else {
string s = state.coerceToString(i->second.value, context, true);
string s = state.coerceToString(*i->value, context, true);
drv.env[key] = s;
if (key == "builder") drv.builder = s;
else if (i->first == state.sSystem) drv.platform = s;
else if (i->first == state.sName) drvName = s;
else if (i->name == state.sSystem) drv.platform = s;
else if (i->name == state.sName) drvName = s;
else if (key == "outputHash") outputHash = s;
else if (key == "outputHashAlgo") outputHashAlgo = s;
else if (key == "outputHashMode") {
@ -375,7 +372,7 @@ static void prim_derivationStrict(EvalState & state, Value * * args, Value & v)
} catch (Error & e) {
e.addPrefix(format("while evaluating the derivation attribute `%1%' at %2%:\n")
% key % *i->second.pos);
% key % *i->pos);
e.addPrefix(format("while instantiating the derivation named `%1%' at %2%:\n")
% drvName % posDrvName);
throw;
@ -487,9 +484,10 @@ static void prim_derivationStrict(EvalState & state, Value * * args, Value & v)
state.drvHashes[drvPath] = hashDerivationModulo(state, drv);
/* !!! assumes a single output */
state.mkAttrs(v);
mkString((*v.attrs)[state.sOutPath].value, outPath, singleton<PathSet>(drvPath));
mkString((*v.attrs)[state.sDrvPath].value, drvPath, singleton<PathSet>("=" + drvPath));
state.mkAttrs(v, 2);
mkString(*state.allocAttr(v, state.sOutPath), outPath, singleton<PathSet>(drvPath));
mkString(*state.allocAttr(v, state.sDrvPath), drvPath, singleton<PathSet>("=" + drvPath));
v.attrs->sort();
}
@ -689,17 +687,14 @@ static void prim_attrNames(EvalState & state, Value * * args, Value & v)
state.forceAttrs(*args[0]);
state.mkList(v, args[0]->attrs->size());
Value * vs = state.allocValues(v.list.length);
StringSet names;
foreach (Bindings::iterator, i, *args[0]->attrs)
names.insert(i->first);
names.insert(i->name);
unsigned int n = 0;
foreach (StringSet::iterator, i, names) {
v.list.elems[n] = &vs[n];
mkString(vs[n++], *i);
}
foreach (StringSet::iterator, i, names)
mkString(*(v.list.elems[n++] = state.allocValue()), *i);
}
@ -713,8 +708,8 @@ static void prim_getAttr(EvalState & state, Value * * args, Value & v)
if (i == args[1]->attrs->end())
throw EvalError(format("attribute `%1%' missing") % attr);
// !!! add to stack trace?
state.forceValue(i->second.value);
v = i->second.value;
state.forceValue(*i->value);
v = *i->value;
}
@ -740,11 +735,20 @@ static void prim_removeAttrs(EvalState & state, Value * * args, Value & v)
state.forceAttrs(*args[0]);
state.forceList(*args[1]);
state.cloneAttrs(*args[0], v);
/* Get the attribute names to be removed. */
std::set<Symbol> names;
for (unsigned int i = 0; i < args[1]->list.length; ++i) {
state.forceStringNoCtx(*args[1]->list.elems[i]);
v.attrs->erase(state.symbols.create(args[1]->list.elems[i]->string.s));
names.insert(state.symbols.create(args[1]->list.elems[i]->string.s));
}
/* Copy all attributes not in that set. Note that we don't need
to sort v.attrs because it's a subset of an already sorted
vector. */
state.mkAttrs(v, args[0]->attrs->size());
foreach (Bindings::iterator, i, *args[0]->attrs) {
if (names.find(i->name) == names.end())
v.attrs->push_back(*i);
}
}
@ -757,7 +761,9 @@ static void prim_listToAttrs(EvalState & state, Value * * args, Value & v)
{
state.forceList(*args[0]);
state.mkAttrs(v);
state.mkAttrs(v, args[0]->list.length);
std::set<Symbol> seen;
for (unsigned int i = 0; i < args[0]->list.length; ++i) {
Value & v2(*args[0]->list.elems[i]);
@ -766,16 +772,21 @@ static void prim_listToAttrs(EvalState & state, Value * * args, Value & v)
Bindings::iterator j = v2.attrs->find(state.sName);
if (j == v2.attrs->end())
throw TypeError("`name' attribute missing in a call to `listToAttrs'");
string name = state.forceStringNoCtx(j->second.value);
string name = state.forceStringNoCtx(*j->value);
j = v2.attrs->find(state.symbols.create("value"));
if (j == v2.attrs->end())
Bindings::iterator j2 = v2.attrs->find(state.symbols.create("value"));
if (j2 == v2.attrs->end())
throw TypeError("`value' attribute missing in a call to `listToAttrs'");
Attr & a = (*v.attrs)[state.symbols.create(name)];
mkCopy(a.value, j->second.value);
a.pos = j->second.pos;
Symbol sym = state.symbols.create(name);
if (seen.find(sym) == seen.end()) {
v.attrs->push_back(Attr(sym, j2->value, j2->pos));
seen.insert(sym);
}
/* !!! Throw an error if `name' already exists? */
}
v.attrs->sort();
}
@ -787,15 +798,12 @@ static void prim_intersectAttrs(EvalState & state, Value * * args, Value & v)
state.forceAttrs(*args[0]);
state.forceAttrs(*args[1]);
state.mkAttrs(v);
state.mkAttrs(v, std::min(args[0]->attrs->size(), args[1]->attrs->size()));
foreach (Bindings::iterator, i, *args[0]->attrs) {
Bindings::iterator j = args[1]->attrs->find(i->first);
if (j != args[1]->attrs->end()) {
Attr & a = (*v.attrs)[j->first];
mkCopy(a.value, j->second.value);
a.pos = j->second.pos;
}
Bindings::iterator j = args[1]->attrs->find(i->name);
if (j != args[1]->attrs->end())
v.attrs->push_back(*j);
}
}
@ -819,12 +827,16 @@ static void prim_functionArgs(EvalState & state, Value * * args, Value & v)
if (args[0]->type != tLambda)
throw TypeError("`functionArgs' requires a function");
state.mkAttrs(v);
if (!args[0]->lambda.fun->matchAttrs) return;
if (!args[0]->lambda.fun->matchAttrs) {
state.mkAttrs(v, 0);
return;
}
state.mkAttrs(v, args[0]->lambda.fun->formals->formals.size());
foreach (Formals::Formals_::iterator, i, args[0]->lambda.fun->formals->formals)
mkBool((*v.attrs)[i->name].value, i->def);
// !!! should optimise booleans (allocate only once)
mkBool(*state.allocAttr(v, i->name), i->def);
v.attrs->sort();
}
@ -872,12 +884,10 @@ static void prim_map(EvalState & state, Value * * args, Value & v)
state.forceList(*args[1]);
state.mkList(v, args[1]->list.length);
Value * vs = state.allocValues(v.list.length);
for (unsigned int n = 0; n < v.list.length; ++n) {
v.list.elems[n] = &vs[n];
mkApp(vs[n], *args[0], *args[1]->list.elems[n]);
}
for (unsigned int n = 0; n < v.list.length; ++n)
mkApp(*(v.list.elems[n] = state.allocValue()),
*args[0], *args[1]->list.elems[n]);
}
@ -1006,9 +1016,10 @@ static void prim_parseDrvName(EvalState & state, Value * * args, Value & v)
{
string name = state.forceStringNoCtx(*args[0]);
DrvName parsed(name);
state.mkAttrs(v);
mkString((*v.attrs)[state.sName].value, parsed.name);
mkString((*v.attrs)[state.symbols.create("version")].value, parsed.version);
state.mkAttrs(v, 2);
mkString(*state.allocAttr(v, state.sName), parsed.name);
mkString(*state.allocAttr(v, state.symbols.create("version")), parsed.version);
v.attrs->sort();
}
@ -1033,7 +1044,7 @@ void EvalState::createBaseEnv()
Value v;
/* `builtins' must be first! */
mkAttrs(v);
mkAttrs(v, 128);
addConstant("builtins", v);
mkBool(v, true);
@ -1072,7 +1083,7 @@ void EvalState::createBaseEnv()
/* Add a wrapper around the derivation primop that computes the
`drvPath' and `outPath' attributes lazily. */
string s = "attrs: let res = derivationStrict attrs; in attrs // { drvPath = res.drvPath; outPath = res.outPath; type = \"derivation\"; }";
mkThunk(v, baseEnv, parseExprFromString(*this, s, "/"));
mkThunk_(v, parseExprFromString(*this, s, "/"));
addConstant("derivation", v);
// Paths
@ -1121,7 +1132,11 @@ void EvalState::createBaseEnv()
// Versions
addPrimOp("__parseDrvName", 1, prim_parseDrvName);
addPrimOp("__compareVersions", 2, prim_compareVersions);
addPrimOp("__compareVersions", 2, prim_compareVersions);
/* Now that we've added all primops, sort the `builtins' attribute
set, because attribute lookups expect it to be sorted. */
baseEnv.values[0]->attrs->sort();
}

2
src/libexpr/symbol-table.hh
View file

@ -28,6 +28,8 @@ private:
friend class SymbolTable;
public:
Symbol() : s(0) { };
bool operator == (const Symbol & s2) const
{
return s == s2.s;

18
src/libexpr/value-to-xml.cc
View file

@ -34,10 +34,10 @@ static void showAttrs(EvalState & state, bool strict, bool location,
StringSet names;
foreach (Bindings::iterator, i, attrs)
names.insert(i->first);
names.insert(i->name);
foreach (StringSet::iterator, i, names) {
Attr & a(attrs[state.symbols.create(*i)]);
Attr & a(*attrs.find(state.symbols.create(*i)));
XMLAttrs xmlAttrs;
xmlAttrs["name"] = *i;
@ -45,7 +45,7 @@ static void showAttrs(EvalState & state, bool strict, bool location,
XMLOpenElement _(doc, "attr", xmlAttrs);
printValueAsXML(state, strict, location,
a.value, doc, context, drvsSeen);
*a.value, doc, context, drvsSeen);
}
}
@ -90,16 +90,16 @@ static void printValueAsXML(EvalState & state, bool strict, bool location,
Path drvPath;
a = v.attrs->find(state.sDrvPath);
if (a != v.attrs->end()) {
if (strict) state.forceValue(a->second.value);
if (a->second.value.type == tString)
xmlAttrs["drvPath"] = drvPath = a->second.value.string.s;
if (strict) state.forceValue(*a->value);
if (a->value->type == tString)
xmlAttrs["drvPath"] = drvPath = a->value->string.s;
}
a = v.attrs->find(state.sOutPath);
if (a != v.attrs->end()) {
if (strict) state.forceValue(a->second.value);
if (a->second.value.type == tString)
xmlAttrs["outPath"] = a->second.value.string.s;
if (strict) state.forceValue(*a->value);
if (a->value->type == tString)
xmlAttrs["outPath"] = a->value->string.s;
}
XMLOpenElement _(doc, "derivation", xmlAttrs);

2
src/libmain/Makefile.am
View file

@ -2,7 +2,7 @@ pkglib_LTLIBRARIES = libmain.la
libmain_la_SOURCES = shared.cc
libmain_la_LIBADD = ../libstore/libstore.la
libmain_la_LIBADD = ../libstore/libstore.la @boehmgc_lib@
pkginclude_HEADERS = shared.hh

32
src/libmain/shared.cc
View file

@ -13,6 +13,10 @@
#include <sys/stat.h>
#include <unistd.h>
#if HAVE_BOEHMGC
#include <gc/gc.h>
#endif
namespace nix {
@ -314,6 +318,14 @@ static void setuidInit()
}
/* Called when the Boehm GC runs out of memory. */
static void * oomHandler(size_t requested)
{
/* Convert this to a proper C++ exception. */
throw std::bad_alloc();
}
}
@ -335,6 +347,26 @@ int main(int argc, char * * argv)
std::ios::sync_with_stdio(false);
#if HAVE_BOEHMGC
/* Initialise the Boehm garbage collector. This isn't necessary
on most platforms, but for portability we do it anyway. */
GC_INIT();
GC_oom_fn = oomHandler;
/* Set the initial heap size to something fairly big (384 MiB) so
that in most cases we don't need to garbage collect at all.
(Collection has a fairly significant overhead, some.) The heap
size can be overriden through libgc's GC_INITIAL_HEAP_SIZE
environment variable. We should probably also provide a
nix.conf setting for this. Note that GC_expand_hp() causes a
lot of virtual, but not physical (resident) memory to be
allocated. This might be a problem on systems that don't
overcommit. */
if (!getenv("GC_INITIAL_HEAP_SIZE"))
GC_expand_hp(384 * 1024 * 1024);
#endif
try {
try {
initAndRun(argc, argv);

8
src/nix-env/nix-env.cc
View file

@ -132,7 +132,7 @@ static void getAllExprs(EvalState & state,
if (hasSuffix(attrName, ".nix"))
attrName = string(attrName, 0, attrName.size() - 4);
attrs.attrs[state.symbols.create(attrName)] =
ExprAttrs::Attr(parseExprFromFile(state, absPath(path2)), noPos);
ExprAttrs::AttrDef(parseExprFromFile(state, absPath(path2)), noPos);
}
else
/* `path2' is a directory (with no default.nix in it);
@ -154,14 +154,14 @@ static Expr * loadSourceExpr(EvalState & state, const Path & path)
some system-wide directory). */
ExprAttrs * attrs = new ExprAttrs;
attrs->attrs[state.symbols.create("_combineChannels")] =
ExprAttrs::Attr(new ExprList(), noPos);
ExprAttrs::AttrDef(new ExprList(), noPos);
getAllExprs(state, path, *attrs);
return attrs;
}
static void loadDerivations(EvalState & state, Path nixExprPath,
string systemFilter, const Bindings & autoArgs,
string systemFilter, Bindings & autoArgs,
const string & pathPrefix, DrvInfos & elems)
{
Value v;
@ -321,7 +321,7 @@ static bool isPath(const string & s)
static void queryInstSources(EvalState & state,
const InstallSourceInfo & instSource, const Strings & args,
InstallSourceInfo & instSource, const Strings & args,
DrvInfos & elems, bool newestOnly)
{
InstallSourceType type = instSource.type;

40
src/nix-env/user-env.cc
View file

@ -25,7 +25,8 @@ DrvInfos queryInstalled(EvalState & state, const Path & userEnv)
if (pathExists(manifestFile)) {
Value v;
state.eval(parseExprFromFile(state, manifestFile), v);
getDerivations(state, v, "", Bindings(), elems);
Bindings bindings;
getDerivations(state, v, "", bindings, elems);
} else if (pathExists(oldManifestFile))
readLegacyManifest(oldManifestFile, elems);
@ -58,23 +59,24 @@ bool createUserEnv(EvalState & state, DrvInfos & elems,
the meta attributes. */
Path drvPath = keepDerivations ? i->queryDrvPath(state) : "";
Value & v(*state.allocValues(1));
Value & v(*state.allocValue());
manifest.list.elems[n++] = &v;
state.mkAttrs(v);
state.mkAttrs(v, 8);
mkString((*v.attrs)[state.sType].value, "derivation");
mkString((*v.attrs)[state.sName].value, i->name);
mkString((*v.attrs)[state.sSystem].value, i->system);
mkString((*v.attrs)[state.sOutPath].value, i->queryOutPath(state));
mkString(*state.allocAttr(v, state.sType), "derivation");
mkString(*state.allocAttr(v, state.sName), i->name);
mkString(*state.allocAttr(v, state.sSystem), i->system);
mkString(*state.allocAttr(v, state.sOutPath), i->queryOutPath(state));
if (drvPath != "")
mkString((*v.attrs)[state.sDrvPath].value, i->queryDrvPath(state));
state.mkAttrs((*v.attrs)[state.sMeta].value);
mkString(*state.allocAttr(v, state.sDrvPath), i->queryDrvPath(state));
Value & vMeta = *state.allocAttr(v, state.sMeta);
state.mkAttrs(vMeta, 16);
MetaInfo meta = i->queryMetaInfo(state);
foreach (MetaInfo::const_iterator, j, meta) {
Value & v2((*(*v.attrs)[state.sMeta].value.attrs)[state.symbols.create(j->first)].value);
Value & v2(*state.allocAttr(vMeta, state.symbols.create(j->first)));
switch (j->second.type) {
case MetaValue::tpInt: mkInt(v2, j->second.intValue); break;
case MetaValue::tpString: mkString(v2, j->second.stringValue); break;
@ -82,7 +84,7 @@ bool createUserEnv(EvalState & state, DrvInfos & elems,
state.mkList(v2, j->second.stringValues.size());
unsigned int m = 0;
foreach (Strings::const_iterator, k, j->second.stringValues) {
v2.list.elems[m] = state.allocValues(1);
v2.list.elems[m] = state.allocValue();
mkString(*v2.list.elems[m++], *k);
}
break;
@ -91,6 +93,9 @@ bool createUserEnv(EvalState & state, DrvInfos & elems,
}
}
vMeta.attrs->sort();
v.attrs->sort();
/* This is only necessary when installing store paths, e.g.,
`nix-env -i /nix/store/abcd...-foo'. */
store->addTempRoot(i->queryOutPath(state));
@ -113,11 +118,12 @@ bool createUserEnv(EvalState & state, DrvInfos & elems,
/* Construct a Nix expression that calls the user environment
builder with the manifest as argument. */
Value args, topLevel;
state.mkAttrs(args);
mkString((*args.attrs)[state.sSystem].value, thisSystem);
mkString((*args.attrs)[state.symbols.create("manifest")].value,
state.mkAttrs(args, 3);
mkString(*state.allocAttr(args, state.sSystem), thisSystem);
mkString(*state.allocAttr(args, state.symbols.create("manifest")),
manifestFile, singleton<PathSet>(manifestFile));
(*args.attrs)[state.symbols.create("derivations")].value = manifest;
args.attrs->push_back(Attr(state.symbols.create("derivations"), &manifest));
args.attrs->sort();
mkApp(topLevel, envBuilder, args);
/* Evaluate it. */

2
src/nix-instantiate/nix-instantiate.cc
View file

@ -38,7 +38,7 @@ static bool indirectRoot = false;
void processExpr(EvalState & state, const Strings & attrPaths,
bool parseOnly, bool strict, const Bindings & autoArgs,
bool parseOnly, bool strict, Bindings & autoArgs,
bool evalOnly, bool xmlOutput, bool location, Expr * e)
{
if (parseOnly)

2
tests/lang/eval-okay-listtoattrs.exp
View file

@ -1 +1 @@
"AA"
"AAbar"

3
tests/lang/eval-okay-listtoattrs.nix
View file

@ -7,4 +7,5 @@ let
a = builtins.listToAttrs list;
b = builtins.listToAttrs ( list ++ list );
r = builtins.listToAttrs [ (asi "result" [ a b ]) ( asi "throw" (throw "this should not be thrown")) ];
in concat (map (x: x.a) r.result)
x = builtins.listToAttrs [ (asi "foo" "bar") (asi "foo" "bla") ];
in concat (map (x: x.a) r.result) + x.foo

1
tests/lang/eval-okay-overrides.exp Normal file
View file

@ -0,0 +1 @@
2

9
tests/lang/eval-okay-overrides.nix Normal file
View file

@ -0,0 +1,9 @@
let
overrides = { a = 2; };
in (rec {
__overrides = overrides;
x = a;
a = 1;
}).x