* Use the Boehm garbage collector to reclaim unused memory in the Nix
expression evaluator.
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b0c11cda7e
commit
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@ -20,7 +20,8 @@ EXTRA_DIST = lexer.l parser.y
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AM_CXXFLAGS = \
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-I$(srcdir)/.. \
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-I$(srcdir)/../libutil -I$(srcdir)/../libstore
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-I$(srcdir)/../libutil -I$(srcdir)/../libstore \
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-I/home/eelco/Dev/nix/boehmgc/include
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# Parser generation.
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@ -8,6 +8,9 @@
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#include <cstring>
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#include <gc/gc.h>
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#include <gc/gc_cpp.h>
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#define LocalNoInline(f) static f __attribute__((noinline)); f
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#define LocalNoInlineNoReturn(f) static f __attribute__((noinline, noreturn)); f
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@ -147,7 +150,7 @@ void EvalState::addPrimOp(const string & name,
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v.type = tPrimOp;
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v.primOp.arity = arity;
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v.primOp.fun = primOp;
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v.primOp.name = strdup(name2.c_str());
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v.primOp.name = GC_strdup(name2.c_str());
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staticBaseEnv.vars[symbols.create(name)] = baseEnvDispl;
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baseEnv.values[baseEnvDispl++] = v;
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(*baseEnv.values[0].attrs)[symbols.create(name2)].value = v;
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@ -218,7 +221,7 @@ LocalNoInline(void addErrorPrefix(Error & e, const char * s, const string & s2,
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void mkString(Value & v, const char * s)
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{
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v.type = tString;
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v.string.s = strdup(s);
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v.string.s = GC_strdup(s);
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v.string.context = 0;
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}
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@ -228,9 +231,10 @@ void mkString(Value & v, const string & s, const PathSet & context)
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mkString(v, s.c_str());
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if (!context.empty()) {
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unsigned int n = 0;
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v.string.context = new const char *[context.size() + 1];
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v.string.context = (const char * *)
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GC_malloc((context.size() + 1) * sizeof(char *));
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foreach (PathSet::const_iterator, i, context)
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v.string.context[n++] = strdup(i->c_str());
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v.string.context[n++] = GC_strdup(i->c_str());
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v.string.context[n] = 0;
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}
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}
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@ -239,7 +243,7 @@ void mkString(Value & v, const string & s, const PathSet & context)
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void mkPath(Value & v, const char * s)
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{
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v.type = tPath;
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v.path = strdup(s);
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v.path = GC_strdup(s);
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}
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@ -264,7 +268,7 @@ Value * EvalState::lookupVar(Env * env, const VarRef & var)
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Value * EvalState::allocValues(unsigned int count)
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{
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nrValues += count;
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return new Value[count]; // !!! check destructor
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return (Value *) GC_MALLOC(count * sizeof(Value));
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}
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@ -272,7 +276,7 @@ Env & EvalState::allocEnv(unsigned int size)
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{
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nrEnvs++;
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nrValuesInEnvs += size;
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Env * env = (Env *) malloc(sizeof(Env) + size * sizeof(Value));
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Env * env = (Env *) GC_MALLOC(sizeof(Env) + size * sizeof(Value));
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return *env;
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}
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@ -281,7 +285,7 @@ void EvalState::mkList(Value & v, unsigned int length)
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{
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v.type = tList;
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v.list.length = length;
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v.list.elems = new Value *[length];
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v.list.elems = (Value * *) GC_MALLOC(length * sizeof(Value *));
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nrListElems += length;
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}
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@ -289,7 +293,7 @@ void EvalState::mkList(Value & v, unsigned int length)
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void EvalState::mkAttrs(Value & v)
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{
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v.type = tAttrs;
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v.attrs = new Bindings;
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v.attrs = new (UseGC) Bindings;
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}
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@ -1089,6 +1093,7 @@ void EvalState::printStats()
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bool showStats = getEnv("NIX_SHOW_STATS", "0") != "0";
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Verbosity v = showStats ? lvlInfo : lvlDebug;
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printMsg(v, "evaluation statistics:");
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printMsg(v, format(" size of a value: %1%") % sizeof(Value));
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printMsg(v, format(" expressions evaluated: %1%") % nrEvaluated);
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printMsg(v, format(" stack space used: %1% bytes") % (&x - deepestStack));
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printMsg(v, format(" max eval() nesting depth: %1%") % maxRecursionDepth);
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@ -7,6 +7,8 @@
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#include <map>
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#include <gc/gc_allocator.h>
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namespace nix {
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@ -16,7 +18,7 @@ struct Env;
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struct Value;
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struct Attr;
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typedef std::map<Symbol, Attr> Bindings;
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typedef std::map<Symbol, Attr, std::less<Symbol>, gc_allocator<std::pair<const Symbol, Attr> > > Bindings;
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typedef enum {
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@ -313,6 +315,7 @@ private:
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char * deepestStack; /* for measuring stack usage */
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friend class RecursionCounter;
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friend class ExprOpUpdate;
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};
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@ -4,7 +4,8 @@ nix_env_SOURCES = nix-env.cc profiles.cc profiles.hh user-env.cc user-env.hh hel
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nix_env_LDADD = ../libmain/libmain.la ../libexpr/libexpr.la \
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../libstore/libstore.la ../libutil/libutil.la \
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../boost/format/libformat.la @ADDITIONAL_NETWORK_LIBS@
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../boost/format/libformat.la @ADDITIONAL_NETWORK_LIBS@ \
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-L/home/eelco/Dev/nix/boehmgc/lib -lgc
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nix-env.o: help.txt.hh
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@ -14,4 +15,5 @@ nix-env.o: help.txt.hh
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AM_CXXFLAGS = \
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-I$(srcdir)/.. \
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-I$(srcdir)/../libutil -I$(srcdir)/../libstore \
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-I$(srcdir)/../libexpr -I$(srcdir)/../libmain -I../libexpr
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-I$(srcdir)/../libexpr -I$(srcdir)/../libmain -I../libexpr \
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-I/home/eelco/Dev/nix/boehmgc/include
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@ -3,7 +3,8 @@ bin_PROGRAMS = nix-instantiate
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nix_instantiate_SOURCES = nix-instantiate.cc help.txt
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nix_instantiate_LDADD = ../libmain/libmain.la ../libexpr/libexpr.la \
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../libstore/libstore.la ../libutil/libutil.la \
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../boost/format/libformat.la @ADDITIONAL_NETWORK_LIBS@
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../boost/format/libformat.la @ADDITIONAL_NETWORK_LIBS@ \
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-L/home/eelco/Dev/nix/boehmgc/lib -lgc
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nix-instantiate.o: help.txt.hh
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@ -12,4 +13,6 @@ nix-instantiate.o: help.txt.hh
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AM_CXXFLAGS = \
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-I$(srcdir)/.. -I$(srcdir)/../libutil -I$(srcdir)/../libstore \
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-I$(srcdir)/../libexpr -I$(srcdir)/../libmain -I../libexpr
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-I$(srcdir)/../libexpr -I$(srcdir)/../libmain -I../libexpr \
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-I/home/eelco/Dev/nix/boehmgc/include
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