diff options
Diffstat (limited to 'src/libexpr')
| -rw-r--r-- | src/libexpr/eval.cc | 105 | ||||
| -rw-r--r-- | src/libexpr/eval.hh | 16 |
2 files changed, 78 insertions, 43 deletions
diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc index 2d22a4fdc5c4..56a73b49405a 100644 --- a/src/libexpr/eval.cc +++ b/src/libexpr/eval.cc @@ -93,7 +93,8 @@ string showType(Value & v) EvalState::EvalState() : baseEnv(allocEnv()) { - nrValues = nrEnvs = nrEvaluated = 0; + nrValues = nrEnvs = nrEvaluated = recursionDepth = maxRecursionDepth = 0; + deepestStack = (char *) -1; initNixExprHelpers(); @@ -103,6 +104,12 @@ EvalState::EvalState() : baseEnv(allocEnv()) } +EvalState::~EvalState() +{ + assert(recursionDepth == 0); +} + + void EvalState::addConstant(const string & name, Value & v) { baseEnv.bindings[toATerm(name)] = v; @@ -141,6 +148,11 @@ LocalNoInlineNoReturn(void throwEvalError(const char * s, const string & s2)) throw EvalError(format(s) % s2); } +LocalNoInlineNoReturn(void throwEvalError(const char * s, const string & s2, const string & s3)) +{ + throw EvalError(format(s) % s2 % s3); +} + LocalNoInlineNoReturn(void throwTypeError(const char * s)) { throw TypeError(s); @@ -151,6 +163,11 @@ LocalNoInlineNoReturn(void throwTypeError(const char * s, const string & s2)) throw TypeError(format(s) % s2); } +LocalNoInlineNoReturn(void throwAssertionError(const char * s, const string & s2)) +{ + throw TypeError(format(s) % s2); +} + LocalNoInline(void addErrorPrefix(Error & e, const char * s)) { e.addPrefix(s); @@ -234,7 +251,7 @@ static Value * lookupVar(Env * env, Sym name) } #endif - throw Error(format("undefined variable `%1%'") % aterm2String(name)); + throwEvalError("undefined variable `%1%'", aterm2String(name)); } @@ -295,21 +312,35 @@ void EvalState::evalFile(const Path & path, Value & v) try { eval(e, v); } catch (Error & e) { - e.addPrefix(format("while evaluating the file `%1%':\n") - % path); + addErrorPrefix(e, "while evaluating the file `%1%':\n", path); throw; } } -static char * deepestStack = (char *) -1; /* for measuring stack usage */ +struct RecursionCounter +{ + EvalState & state; + RecursionCounter(EvalState & state) : state(state) + { + state.recursionDepth++; + if (state.recursionDepth > state.maxRecursionDepth) + state.maxRecursionDepth = state.recursionDepth; + } + ~RecursionCounter() + { + state.recursionDepth--; + } +}; void EvalState::eval(Env & env, Expr e, Value & v) { /* When changing this function, make sure that you don't cause a (large) increase in stack consumption! */ - + + /* !!! Disable this eventually. */ + RecursionCounter r(*this); char x; if (&x < deepestStack) deepestStack = &x; @@ -482,8 +513,7 @@ void EvalState::eval(Env & env, Expr e, Value & v) } if (isPath && !context.empty()) - throw EvalError(format("a string that refers to a store path cannot be appended to a path, in `%1%'") - % s.str()); + throwEvalError("a string that refers to a store path cannot be appended to a path, in `%1%'", s.str()); if (isPath) mkPath(v, s.str().c_str()); @@ -498,7 +528,7 @@ void EvalState::eval(Env & env, Expr e, Value & v) /* Assertions. */ else if (matchAssert(e, e1, e2, pos)) { if (!evalBool(env, e1)) - throw AssertionError(format("assertion failed at %1%") % showPos(pos)); + throwAssertionError("assertion failed at %1%", showPos(pos)); eval(env, e2, v); } @@ -538,7 +568,7 @@ void EvalState::eval(Env & env, Expr e, Value & v) mkBool(v, vAttrs.attrs->find(name) != vAttrs.attrs->end()); } - else throw Error("unsupported term"); + else abort(); } @@ -615,8 +645,8 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v) if (j == arg.attrs->end()) { if (!matchDefaultValue(def2, def)) def = 0; - if (def == 0) throw TypeError(format("the argument named `%1%' required by the function is missing") - % aterm2String(name)); + if (def == 0) throwTypeError("the argument named `%1%' required by the function is missing", + aterm2String(name)); mkThunk(v, env2, def); } else { attrsUsed++; @@ -629,7 +659,7 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v) TODO: show the names of the expected/unexpected arguments. */ if (ellipsis == eFalse && attrsUsed != arg.attrs->size()) - throw TypeError("function called with unexpected argument"); + throwTypeError("function called with unexpected argument"); } else abort(); @@ -661,8 +691,7 @@ void EvalState::autoCallFunction(const Bindings & args, Value & fun, Value & res if (j != args.end()) (*actualArgs.attrs)[name] = j->second; else if (!matchDefaultValue(def2, def)) - throw TypeError(format("cannot auto-call a function that has an argument without a default value (`%1% ')") - % aterm2String(name)); + throwTypeError("cannot auto-call a function that has an argument without a default value (`%1%')", aterm2String(name)); } callFunction(fun, actualArgs, res); @@ -680,7 +709,7 @@ bool EvalState::evalBool(Env & env, Expr e) Value v; eval(env, e, v); if (v.type != tBool) - throw TypeError(format("value is %1% while a Boolean was expected") % showType(v)); + throwTypeError("value is %1% while a Boolean was expected", showType(v)); return v.boolean; } @@ -704,7 +733,7 @@ void EvalState::forceValue(Value & v) else if (v.type == tApp) callFunction(*v.app.left, *v.app.right, v); else if (v.type == tBlackhole) - throw EvalError("infinite recursion encountered"); + throwEvalError("infinite recursion encountered"); } @@ -728,7 +757,7 @@ int EvalState::forceInt(Value & v) { forceValue(v); if (v.type != tInt) - throw TypeError(format("value is %1% while an integer was expected") % showType(v)); + throwTypeError("value is %1% while an integer was expected", showType(v)); return v.integer; } @@ -737,7 +766,7 @@ bool EvalState::forceBool(Value & v) { forceValue(v); if (v.type != tBool) - throw TypeError(format("value is %1% while a Boolean was expected") % showType(v)); + throwTypeError("value is %1% while a Boolean was expected", showType(v)); return v.boolean; } @@ -746,7 +775,7 @@ void EvalState::forceAttrs(Value & v) { forceValue(v); if (v.type != tAttrs) - throw TypeError(format("value is %1% while an attribute set was expected") % showType(v)); + throwTypeError("value is %1% while an attribute set was expected", showType(v)); } @@ -754,7 +783,7 @@ void EvalState::forceList(Value & v) { forceValue(v); if (v.type != tList) - throw TypeError(format("value is %1% while a list was expected") % showType(v)); + throwTypeError("value is %1% while a list was expected", showType(v)); } @@ -762,7 +791,7 @@ void EvalState::forceFunction(Value & v) { forceValue(v); if (v.type != tLambda && v.type != tPrimOp && v.type != tPrimOpApp) - throw TypeError(format("value is %1% while a function was expected") % showType(v)); + throwTypeError("value is %1% while a function was expected", showType(v)); } @@ -770,7 +799,7 @@ string EvalState::forceString(Value & v) { forceValue(v); if (v.type != tString) - throw TypeError(format("value is %1% while a string was expected") % showType(v)); + throwTypeError("value is %1% while a string was expected", showType(v)); return string(v.string.s); } @@ -778,10 +807,9 @@ string EvalState::forceString(Value & v) string EvalState::forceString(Value & v, PathSet & context) { string s = forceString(v); - if (v.string.context) { + if (v.string.context) for (const char * * p = v.string.context; *p; ++p) context.insert(*p); - } return s; } @@ -790,8 +818,8 @@ string EvalState::forceStringNoCtx(Value & v) { string s = forceString(v); if (v.string.context) - throw EvalError(format("the string `%1%' is not allowed to refer to a store path (such as `%2%')") - % v.string.s % v.string.context[0]); + throwEvalError("the string `%1%' is not allowed to refer to a store path (such as `%2%')", + v.string.s, v.string.context[0]); return s; } @@ -824,8 +852,7 @@ string EvalState::coerceToString(Value & v, PathSet & context, if (!copyToStore) return path; if (nix::isDerivation(path)) - throw EvalError(format("file names are not allowed to end in `%1%'") - % drvExtension); + throwEvalError("file names are not allowed to end in `%1%'", drvExtension); Path dstPath; if (srcToStore[path] != "") @@ -881,7 +908,7 @@ Path EvalState::coerceToPath(Value & v, PathSet & context) { string path = coerceToString(v, context, false, false); if (path == "" || path[0] != '/') - throw EvalError(format("string `%1%' doesn't represent an absolute path") % path); + throwEvalError("string `%1%' doesn't represent an absolute path", path); return path; } @@ -932,7 +959,7 @@ bool EvalState::eqValues(Value & v1, Value & v2) return false; default: - throw Error(format("cannot compare %1% with %2%") % showType(v1) % showType(v2)); + throwEvalError("cannot compare %1% with %2%", showType(v1), showType(v2)); } } @@ -941,14 +968,14 @@ void EvalState::printStats() { char x; bool showStats = getEnv("NIX_SHOW_STATS", "0") != "0"; - printMsg(showStats ? lvlInfo : lvlDebug, - format("evaluated %1% expressions, used %2% bytes of stack space, allocated %3% values, allocated %4% environments") - % nrEvaluated - % (&x - deepestStack) - % nrValues - % nrEnvs); - if (showStats) - printATermMapStats(); + Verbosity v = showStats ? lvlInfo : lvlDebug; + printMsg(v, "evaluation statistics:"); + 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(" values allocated: %1%") % nrValues); + printMsg(v, format(" environments allocated: %1%") % nrEnvs); } diff --git a/src/libexpr/eval.hh b/src/libexpr/eval.hh index 0ea474447f1f..fb4dd802e0b0 100644 --- a/src/libexpr/eval.hh +++ b/src/libexpr/eval.hh @@ -144,10 +144,6 @@ public: private: SrcToStore srcToStore; - unsigned long nrValues; - unsigned long nrEnvs; - unsigned long nrEvaluated; - bool allowUnsafeEquality; ATermMap parseTrees; @@ -155,6 +151,7 @@ private: public: EvalState(); + ~EvalState(); /* Evaluate an expression read from the given file to normal form. */ @@ -242,6 +239,17 @@ public: /* Print statistics. */ void printStats(); + +private: + + unsigned long nrValues; + unsigned long nrEnvs; + unsigned long nrEvaluated; + unsigned int recursionDepth; + unsigned int maxRecursionDepth; + char * deepestStack; /* for measuring stack usage */ + + friend class RecursionCounter; }; |