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move throw to preverve Error type; turn off debugger for tryEval

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This commit is contained in:
Ben Burdette 2022-04-08 12:34:27 -06:00
parent 1a93ac8133
commit b8b8ec7101
8 changed files with 361 additions and 140 deletions
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2
src/libcmd/repl.cc
View file

@ -50,7 +50,7 @@ struct NixRepl
ref<EvalState> state;
Bindings * autoArgs;
const Error *debugError;
const Error *debugError;
int debugTraceIndex;
Strings loadedFiles;

46
src/libexpr/eval-cache.cc
View file

@ -528,14 +528,22 @@ std::string AttrCursor::getString()
debug("using cached string attribute '%s'", getAttrPathStr());
return s->first;
} else
root->state.debug_throw(TypeError("'%s' is not a string", getAttrPathStr()));
{
auto e = TypeError("'%s' is not a string", getAttrPathStr());
root->state.debugLastTrace(e);
throw e;
}
}
}
auto & v = forceValue();
if (v.type() != nString && v.type() != nPath)
root->state.debug_throw(TypeError("'%s' is not a string but %s", getAttrPathStr(), showType(v.type())));
{
auto e = TypeError("'%s' is not a string but %s", getAttrPathStr(), showType(v.type()));
root->state.debugLastTrace(e);
throw e;
}
return v.type() == nString ? v.string.s : v.path;
}
@ -559,7 +567,11 @@ string_t AttrCursor::getStringWithContext()
return *s;
}
} else
root->state.debug_throw(TypeError("'%s' is not a string", getAttrPathStr()));
{
auto e = TypeError("'%s' is not a string", getAttrPathStr());
root->state.debugLastTrace(e);
throw e;
}
}
}
@ -571,7 +583,9 @@ string_t AttrCursor::getStringWithContext()
return {v.path, {}};
else
{
root->state.debug_throw(TypeError("'%s' is not a string but %s", getAttrPathStr(), showType(v.type())));
auto e = TypeError("'%s' is not a string but %s", getAttrPathStr(), showType(v.type()));
root->state.debugLastTrace(e);
throw e;
return {v.path, {}}; // should never execute
}
}
@ -586,14 +600,22 @@ bool AttrCursor::getBool()
debug("using cached Boolean attribute '%s'", getAttrPathStr());
return *b;
} else
root->state.debug_throw(TypeError("'%s' is not a Boolean", getAttrPathStr()));
{
auto e = TypeError("'%s' is not a Boolean", getAttrPathStr());
root->state.debugLastTrace(e);
throw e;
}
}
}
auto & v = forceValue();
if (v.type() != nBool)
root->state.debug_throw(TypeError("'%s' is not a Boolean", getAttrPathStr()));
{
auto e = TypeError("'%s' is not a Boolean", getAttrPathStr());
root->state.debugLastTrace(e);
throw e;
}
return v.boolean;
}
@ -608,14 +630,22 @@ std::vector<Symbol> AttrCursor::getAttrs()
debug("using cached attrset attribute '%s'", getAttrPathStr());
return *attrs;
} else
root->state.debug_throw(TypeError("'%s' is not an attribute set", getAttrPathStr()));
{
auto e = TypeError("'%s' is not an attribute set", getAttrPathStr());
root->state.debugLastTrace(e);
throw e;
}
}
}
auto & v = forceValue();
if (v.type() != nAttrs)
root->state.debug_throw(TypeError("'%s' is not an attribute set", getAttrPathStr()));
{
auto e = TypeError("'%s' is not an attribute set", getAttrPathStr());
root->state.debugLastTrace(e);
throw e;
}
std::vector<Symbol> attrs;
for (auto & attr : *getValue().attrs)

26
src/libexpr/eval.cc
View file

@ -833,15 +833,13 @@ LocalNoInlineNoReturn(void throwEvalError(const char * s, const std::string & s2
throw error;
}
void EvalState::debug_throw(Error e) {
void EvalState::debugLastTrace(Error & e) {
// call this in the situation where Expr and Env are inaccessible. The debugger will start in the last context
// that's in the DebugTrace stack.
if (debuggerHook && !debugTraces.empty()) {
DebugTrace &last = debugTraces.front();
debuggerHook(&e, last.env, last.expr);
}
throw e;
}
LocalNoInlineNoReturn(void throwEvalError(const Pos & pos, const Suggestions & suggestions, const char * s, const std::string & s2, Env & env, Expr &expr))
@ -865,10 +863,7 @@ LocalNoInlineNoReturn(void throwEvalError(const Pos & pos, const char * s, const
.errPos = pos
});
if (debuggerHook && !evalState.debugTraces.empty()) {
DebugTrace &last = evalState.debugTraces.front();
debuggerHook(&error, last.env, last.expr);
}
evalState.debugLastTrace(error);
throw error;
}
@ -906,10 +901,7 @@ LocalNoInlineNoReturn(void throwEvalError(const Pos & pos, const char * s, const
.errPos = pos
});
if (debuggerHook && !evalState.debugTraces.empty()) {
DebugTrace &last = evalState.debugTraces.front();
debuggerHook(&error, last.env, last.expr);
}
evalState.debugLastTrace(error);
throw error;
}
@ -921,10 +913,7 @@ LocalNoInlineNoReturn(void throwEvalError(const char * s, const std::string & s2
.errPos = noPos
});
if (debuggerHook && !evalState.debugTraces.empty()) {
DebugTrace &last = evalState.debugTraces.front();
debuggerHook(&error, last.env, last.expr);
}
evalState.debugLastTrace(error);
throw error;
}
@ -950,10 +939,7 @@ LocalNoInlineNoReturn(void throwTypeError(const Pos & pos, const char * s, EvalS
.errPos = pos
});
if (debuggerHook && !evalState.debugTraces.empty()) {
DebugTrace &last = evalState.debugTraces.front();
debuggerHook(&error, last.env, last.expr);
}
evalState.debugLastTrace(error);
throw error;
}
@ -972,8 +958,6 @@ LocalNoInlineNoReturn(void throwTypeError(const Pos & pos, const char * s, const
throw error;
}
// LocalNoInlineNoReturn(void throwTypeError(const char * s, const Value & v));
LocalNoInlineNoReturn(void throwTypeError(const Pos & pos, const char * s, const ExprLambda & fun, const Symbol & s2, Env & env, Expr &expr))
{
auto error = TypeError({

2
src/libexpr/eval.hh
View file

@ -119,7 +119,7 @@ public:
bool debugStop;
bool debugQuit;
std::list<DebugTrace> debugTraces;
void debug_throw(Error e);
void debugLastTrace(Error & e);
private:
SrcToStore srcToStore;

7
src/libexpr/parser.y
View file

@ -783,14 +783,15 @@ Path EvalState::findFile(SearchPath & searchPath, const std::string_view path, c
if (hasPrefix(path, "nix/"))
return concatStrings(corepkgsPrefix, path.substr(4));
debug_throw(ThrownError({
auto e = ThrownError({
.msg = hintfmt(evalSettings.pureEval
? "cannot look up '<%s>' in pure evaluation mode (use '--impure' to override)"
: "file '%s' was not found in the Nix search path (add it using $NIX_PATH or -I)",
path),
.errPos = pos
}));
return Path(); // should never execute due to debug_throw above.
});
debugLastTrace(e);
throw e;
}

337
src/libexpr/primops.cc
View file

@ -46,7 +46,11 @@ StringMap EvalState::realiseContext(const PathSet & context)
auto [ctx, outputName] = decodeContext(*store, i);
auto ctxS = store->printStorePath(ctx);
if (!store->isValidPath(ctx))
debug_throw(InvalidPathError(store->printStorePath(ctx)));
{
auto e = InvalidPathError(store->printStorePath(ctx));
debugLastTrace(e);
throw e;
}
if (!outputName.empty() && ctx.isDerivation()) {
drvs.push_back({ctx, {outputName}});
} else {
@ -57,9 +61,13 @@ StringMap EvalState::realiseContext(const PathSet & context)
if (drvs.empty()) return {};
if (!evalSettings.enableImportFromDerivation)
debug_throw(Error(
{
auto e = Error(
"cannot build '%1%' during evaluation because the option 'allow-import-from-derivation' is disabled",
store->printStorePath(drvs.begin()->drvPath)));
store->printStorePath(drvs.begin()->drvPath));
debugLastTrace(e);
throw e;
}
/* Build/substitute the context. */
std::vector<DerivedPath> buildReqs;
@ -71,8 +79,12 @@ StringMap EvalState::realiseContext(const PathSet & context)
auto outputPaths = store->queryDerivationOutputMap(drvPath);
for (auto & outputName : outputs) {
if (outputPaths.count(outputName) == 0)
debug_throw(Error("derivation '%s' does not have an output named '%s'",
store->printStorePath(drvPath), outputName));
{
auto e = Error("derivation '%s' does not have an output named '%s'",
store->printStorePath(drvPath), outputName);
debugLastTrace(e);
throw e;
}
res.insert_or_assign(
downstreamPlaceholder(*store, drvPath, outputName),
store->printStorePath(outputPaths.at(outputName))
@ -318,17 +330,29 @@ void prim_importNative(EvalState & state, const Pos & pos, Value * * args, Value
void *handle = dlopen(path.c_str(), RTLD_LAZY | RTLD_LOCAL);
if (!handle)
state.debug_throw(EvalError("could not open '%1%': %2%", path, dlerror()));
{
auto e = EvalError("could not open '%1%': %2%", path, dlerror());
state.debugLastTrace(e);
throw e;
}
dlerror();
ValueInitializer func = (ValueInitializer) dlsym(handle, sym.c_str());
if(!func) {
char *message = dlerror();
if (message)
state.debug_throw(EvalError("could not load symbol '%1%' from '%2%': %3%", sym, path, message));
{
auto e = EvalError("could not load symbol '%1%' from '%2%': %3%", sym, path, message);
state.debugLastTrace(e);
throw e;
}
else
state.debug_throw(EvalError("symbol '%1%' from '%2%' resolved to NULL when a function pointer was expected",
sym, path));
{
auto e = EvalError("symbol '%1%' from '%2%' resolved to NULL when a function pointer was expected",
sym, path);
state.debugLastTrace(e);
throw e;
}
}
(func)(state, v);
@ -344,10 +368,12 @@ void prim_exec(EvalState & state, const Pos & pos, Value * * args, Value & v)
auto elems = args[0]->listElems();
auto count = args[0]->listSize();
if (count == 0) {
state.debug_throw(EvalError({
auto e = EvalError({
.msg = hintfmt("at least one argument to 'exec' required"),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
PathSet context;
auto program = state.coerceToString(pos, *elems[0], context, false, false).toOwned();
@ -358,11 +384,13 @@ void prim_exec(EvalState & state, const Pos & pos, Value * * args, Value & v)
try {
auto _ = state.realiseContext(context); // FIXME: Handle CA derivations
} catch (InvalidPathError & e) {
state.debug_throw(EvalError({
auto ee = EvalError({
.msg = hintfmt("cannot execute '%1%', since path '%2%' is not valid",
program, e.path),
.errPos = pos
}));
});
state.debugLastTrace(ee);
throw ee;
}
auto output = runProgram(program, true, commandArgs);
@ -545,7 +573,11 @@ struct CompareValues
if (v1->type() == nInt && v2->type() == nFloat)
return v1->integer < v2->fpoint;
if (v1->type() != v2->type())
state.debug_throw(EvalError("cannot compare %1% with %2%", showType(*v1), showType(*v2)));
{
auto e = EvalError("cannot compare %1% with %2%", showType(*v1), showType(*v2));
state.debugLastTrace(e);
throw e;
}
switch (v1->type()) {
case nInt:
return v1->integer < v2->integer;
@ -567,8 +599,11 @@ struct CompareValues
}
}
default:
state.debug_throw(EvalError("cannot compare %1% with %2%", showType(*v1), showType(*v2)));
return false;
{
auto e = EvalError("cannot compare %1% with %2%", showType(*v1), showType(*v2));
state.debugLastTrace(e);
throw e;
}
}
}
};
@ -598,10 +633,12 @@ static Bindings::iterator getAttr(
Pos aPos = *attrSet->pos;
if (aPos == noPos) {
state.debug_throw(TypeError({
auto e = TypeError({
.msg = errorMsg,
.errPos = pos,
}));
});
state.debugLastTrace(e);
throw e;
} else {
auto e = TypeError({
.msg = errorMsg,
@ -611,7 +648,8 @@ static Bindings::iterator getAttr(
// Adding another trace for the function name to make it clear
// which call received wrong arguments.
e.addTrace(pos, hintfmt("while invoking '%s'", funcName));
state.debug_throw(e);
state.debugLastTrace(e);
throw e;
}
}
@ -665,10 +703,14 @@ static void prim_genericClosure(EvalState & state, const Pos & pos, Value * * ar
Bindings::iterator key =
e->attrs->find(state.sKey);
if (key == e->attrs->end())
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("attribute 'key' required"),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
state.forceValue(*key->value, pos);
if (!doneKeys.insert(key->value).second) continue;
@ -768,7 +810,11 @@ static RegisterPrimOp primop_abort({
{
PathSet context;
auto s = state.coerceToString(pos, *args[0], context).toOwned();
state.debug_throw(Abort("evaluation aborted with the following error message: '%1%'", s));
{
auto e = Abort("evaluation aborted with the following error message: '%1%'", s);
state.debugLastTrace(e);
throw e;
}
}
});
@ -786,7 +832,9 @@ static RegisterPrimOp primop_throw({
{
PathSet context;
auto s = state.coerceToString(pos, *args[0], context).toOwned();
state.debug_throw(ThrownError(s));
auto e = ThrownError(s);
state.debugLastTrace(e);
throw e;
}
});
@ -851,6 +899,8 @@ static RegisterPrimOp primop_floor({
static void prim_tryEval(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
auto attrs = state.buildBindings(2);
auto saveDebuggerHook = debuggerHook;
debuggerHook = 0;
try {
state.forceValue(*args[0], pos);
attrs.insert(state.sValue, args[0]);
@ -859,6 +909,7 @@ static void prim_tryEval(EvalState & state, const Pos & pos, Value * * args, Val
attrs.alloc(state.sValue).mkBool(false);
attrs.alloc("success").mkBool(false);
}
debuggerHook = saveDebuggerHook;
v.mkAttrs(attrs);
}
@ -1041,37 +1092,53 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
if (s == "recursive") ingestionMethod = FileIngestionMethod::Recursive;
else if (s == "flat") ingestionMethod = FileIngestionMethod::Flat;
else
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("invalid value '%s' for 'outputHashMode' attribute", s),
.errPos = posDrvName
}));
});
state.debugLastTrace(e);
throw e;
}
};
auto handleOutputs = [&](const Strings & ss) {
outputs.clear();
for (auto & j : ss) {
if (outputs.find(j) != outputs.end())
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("duplicate derivation output '%1%'", j),
.errPos = posDrvName
}));
});
state.debugLastTrace(e);
throw e;
}
/* !!! Check whether j is a valid attribute
name. */
/* Derivations cannot be named ‘drv’, because
then we'd have an attribute ‘drvPath’ in
the resulting set. */
if (j == "drv")
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("invalid derivation output name 'drv'" ),
.errPos = posDrvName
}));
});
state.debugLastTrace(e);
throw e;
}
outputs.insert(j);
}
if (outputs.empty())
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("derivation cannot have an empty set of outputs"),
.errPos = posDrvName
}));
});
state.debugLastTrace(e);
throw e;
}
};
try {
@ -1196,23 +1263,35 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
/* Do we have all required attributes? */
if (drv.builder == "")
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("required attribute 'builder' missing"),
.errPos = posDrvName
}));
});
state.debugLastTrace(e);
throw e;
}
if (drv.platform == "")
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("required attribute 'system' missing"),
.errPos = posDrvName
}));
});
state.debugLastTrace(e);
throw e;
}
/* Check whether the derivation name is valid. */
if (isDerivation(drvName))
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("derivation names are not allowed to end in '%s'", drvExtension),
.errPos = posDrvName
}));
});
state.debugLastTrace(e);
throw e;
}
if (outputHash) {
/* Handle fixed-output derivations.
@ -1220,10 +1299,14 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
Ignore `__contentAddressed` because fixed output derivations are
already content addressed. */
if (outputs.size() != 1 || *(outputs.begin()) != "out")
state.debug_throw(Error({
{
auto e = Error({
.msg = hintfmt("multiple outputs are not supported in fixed-output derivations"),
.errPos = posDrvName
}));
});
state.debugLastTrace(e);
throw e;
}
auto h = newHashAllowEmpty(*outputHash, parseHashTypeOpt(outputHashAlgo));
@ -1386,10 +1469,14 @@ static RegisterPrimOp primop_toPath({
static void prim_storePath(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
if (evalSettings.pureEval)
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("'%s' is not allowed in pure evaluation mode", "builtins.storePath"),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
PathSet context;
Path path = state.checkSourcePath(state.coerceToPath(pos, *args[0], context));
@ -1398,10 +1485,14 @@ static void prim_storePath(EvalState & state, const Pos & pos, Value * * args, V
e.g. nix-push does the right thing. */
if (!state.store->isStorePath(path)) path = canonPath(path, true);
if (!state.store->isInStore(path))
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("path '%1%' is not in the Nix store", path),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
auto path2 = state.store->toStorePath(path).first;
if (!settings.readOnlyMode)
state.store->ensurePath(path2);
@ -1504,7 +1595,11 @@ static void prim_readFile(EvalState & state, const Pos & pos, Value * * args, Va
auto path = realisePath(state, pos, *args[0]);
auto s = readFile(path);
if (s.find((char) 0) != std::string::npos)
state.debug_throw(Error("the contents of the file '%1%' cannot be represented as a Nix string", path));
{
auto e = Error("the contents of the file '%1%' cannot be represented as a Nix string", path);
state.debugLastTrace(e);
throw e;
}
StorePathSet refs;
if (state.store->isInStore(path)) {
try {
@ -1556,10 +1651,12 @@ static void prim_findFile(EvalState & state, const Pos & pos, Value * * args, Va
auto rewrites = state.realiseContext(context);
path = rewriteStrings(path, rewrites);
} catch (InvalidPathError & e) {
state.debug_throw(EvalError({
auto ee = EvalError({
.msg = hintfmt("cannot find '%1%', since path '%2%' is not valid", path, e.path),
.errPos = pos
}));
});
state.debugLastTrace(ee);
throw ee;
}
@ -1583,10 +1680,14 @@ static void prim_hashFile(EvalState & state, const Pos & pos, Value * * args, Va
auto type = state.forceStringNoCtx(*args[0], pos);
std::optional<HashType> ht = parseHashType(type);
if (!ht)
state.debug_throw(Error({
{
auto e = Error({
.msg = hintfmt("unknown hash type '%1%'", type),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
auto path = realisePath(state, pos, *args[1]);
@ -1823,13 +1924,17 @@ static void prim_toFile(EvalState & state, const Pos & pos, Value * * args, Valu
for (auto path : context) {
if (path.at(0) != '/')
state.debug_throw(EvalError( {
{
auto e = EvalError( {
.msg = hintfmt(
"in 'toFile': the file named '%1%' must not contain a reference "
"to a derivation but contains (%2%)",
name, path),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
refs.insert(state.store->parseStorePath(path));
}
@ -1986,7 +2091,11 @@ static void addPath(
? state.store->computeStorePathForPath(name, path, method, htSHA256, filter).first
: state.store->addToStore(name, path, method, htSHA256, filter, state.repair, refs);
if (expectedHash && expectedStorePath != dstPath)
state.debug_throw(Error("store path mismatch in (possibly filtered) path added from '%s'", path));
{
auto e = Error("store path mismatch in (possibly filtered) path added from '%s'", path);
state.debugLastTrace(e);
throw e;
}
state.allowAndSetStorePathString(dstPath, v);
} else
state.allowAndSetStorePathString(*expectedStorePath, v);
@ -2004,12 +2113,16 @@ static void prim_filterSource(EvalState & state, const Pos & pos, Value * * args
state.forceValue(*args[0], pos);
if (args[0]->type() != nFunction)
state.debug_throw(TypeError({
{
auto e = TypeError({
.msg = hintfmt(
"first argument in call to 'filterSource' is not a function but %1%",
showType(*args[0])),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
addPath(state, pos, std::string(baseNameOf(path)), path, args[0], FileIngestionMethod::Recursive, std::nullopt, v, context);
}
@ -2093,16 +2206,24 @@ static void prim_path(EvalState & state, const Pos & pos, Value * * args, Value
else if (n == "sha256")
expectedHash = newHashAllowEmpty(state.forceStringNoCtx(*attr.value, *attr.pos), htSHA256);
else
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("unsupported argument '%1%' to 'addPath'", attr.name),
.errPos = *attr.pos
}));
});
state.debugLastTrace(e);
throw e;
}
}
if (path.empty())
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("'path' required"),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
if (name.empty())
name = baseNameOf(path);
@ -2473,10 +2594,14 @@ static void prim_functionArgs(EvalState & state, const Pos & pos, Value * * args
return;
}
if (!args[0]->isLambda())
state.debug_throw(TypeError({
{
auto e = TypeError({
.msg = hintfmt("'functionArgs' requires a function"),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
if (!args[0]->lambda.fun->hasFormals()) {
v.mkAttrs(&state.emptyBindings);
@ -2564,7 +2689,8 @@ static void prim_zipAttrsWith(EvalState & state, const Pos & pos, Value * * args
attrsSeen[attr.name].first++;
} catch (TypeError & e) {
e.addTrace(pos, hintfmt("while invoking '%s'", "zipAttrsWith"));
state.debug_throw(e);
state.debugLastTrace(e);
throw e;
}
}
@ -2651,10 +2777,14 @@ static void elemAt(EvalState & state, const Pos & pos, Value & list, int n, Valu
{
state.forceList(list, pos);
if (n < 0 || (unsigned int) n >= list.listSize())
state.debug_throw(Error({
{
auto e = Error({
.msg = hintfmt("list index %1% is out of boundz", n),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
state.forceValue(*list.listElems()[n], pos);
v = *list.listElems()[n];
}
@ -2699,10 +2829,14 @@ static void prim_tail(EvalState & state, const Pos & pos, Value * * args, Value
{
state.forceList(*args[0], pos);
if (args[0]->listSize() == 0)
state.debug_throw(Error({
{
auto e = Error({
.msg = hintfmt("'tail' called on an empty list"),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
state.mkList(v, args[0]->listSize() - 1);
for (unsigned int n = 0; n < v.listSize(); ++n)
@ -2937,10 +3071,14 @@ static void prim_genList(EvalState & state, const Pos & pos, Value * * args, Val
auto len = state.forceInt(*args[1], pos);
if (len < 0)
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("cannot create list of size %1%", len),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
state.mkList(v, len);
@ -3149,7 +3287,8 @@ static void prim_concatMap(EvalState & state, const Pos & pos, Value * * args, V
state.forceList(lists[n], lists[n].determinePos(args[0]->determinePos(pos)));
} catch (TypeError &e) {
e.addTrace(pos, hintfmt("while invoking '%s'", "concatMap"));
state.debug_throw(e);
state.debugLastTrace(e);
throw e;
}
len += lists[n].listSize();
}
@ -3244,10 +3383,14 @@ static void prim_div(EvalState & state, const Pos & pos, Value * * args, Value &
NixFloat f2 = state.forceFloat(*args[1], pos);
if (f2 == 0)
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("division by zero"),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
if (args[0]->type() == nFloat || args[1]->type() == nFloat) {
v.mkFloat(state.forceFloat(*args[0], pos) / state.forceFloat(*args[1], pos));
@ -3256,10 +3399,14 @@ static void prim_div(EvalState & state, const Pos & pos, Value * * args, Value &
NixInt i2 = state.forceInt(*args[1], pos);
/* Avoid division overflow as it might raise SIGFPE. */
if (i1 == std::numeric_limits<NixInt>::min() && i2 == -1)
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("overflow in integer division"),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
v.mkInt(i1 / i2);
}
@ -3387,10 +3534,14 @@ static void prim_substring(EvalState & state, const Pos & pos, Value * * args, V
auto s = state.coerceToString(pos, *args[2], context);
if (start < 0)
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("negative start position in 'substring'"),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
v.mkString((unsigned int) start >= s->size() ? "" : s->substr(start, len), context);
}
@ -3438,10 +3589,14 @@ static void prim_hashString(EvalState & state, const Pos & pos, Value * * args,
auto type = state.forceStringNoCtx(*args[0], pos);
std::optional<HashType> ht = parseHashType(type);
if (!ht)
state.debug_throw(Error({
{
auto e = Error({
.msg = hintfmt("unknown hash type '%1%'", type),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
PathSet context; // discarded
auto s = state.forceString(*args[1], context, pos);
@ -3511,15 +3666,19 @@ void prim_match(EvalState & state, const Pos & pos, Value * * args, Value & v)
} catch (std::regex_error &e) {
if (e.code() == std::regex_constants::error_space) {
// limit is _GLIBCXX_REGEX_STATE_LIMIT for libstdc++
state.debug_throw(EvalError({
auto e = EvalError({
.msg = hintfmt("memory limit exceeded by regular expression '%s'", re),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
} else {
state.debug_throw(EvalError({
auto e = EvalError({
.msg = hintfmt("invalid regular expression '%s'", re),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
}
}
@ -3616,15 +3775,19 @@ void prim_split(EvalState & state, const Pos & pos, Value * * args, Value & v)
} catch (std::regex_error &e) {
if (e.code() == std::regex_constants::error_space) {
// limit is _GLIBCXX_REGEX_STATE_LIMIT for libstdc++
state.debug_throw(EvalError({
auto e = EvalError({
.msg = hintfmt("memory limit exceeded by regular expression '%s'", re),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
} else {
state.debug_throw(EvalError({
auto e = EvalError({
.msg = hintfmt("invalid regular expression '%s'", re),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
}
}
@ -3701,10 +3864,14 @@ static void prim_replaceStrings(EvalState & state, const Pos & pos, Value * * ar
state.forceList(*args[0], pos);
state.forceList(*args[1], pos);
if (args[0]->listSize() != args[1]->listSize())
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("'from' and 'to' arguments to 'replaceStrings' have different lengths"),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
std::vector<std::string> from;
from.reserve(args[0]->listSize());

74
src/libexpr/primops/fetchTree.cc
View file

@ -108,16 +108,25 @@ static void fetchTree(
if (auto aType = args[0]->attrs->get(state.sType)) {
if (type)
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("unexpected attribute 'type'"),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
type = state.forceStringNoCtx(*aType->value, *aType->pos);
} else if (!type)
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("attribute 'type' is missing in call to 'fetchTree'"),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
attrs.emplace("type", type.value());
@ -138,16 +147,24 @@ static void fetchTree(
else if (attr.value->type() == nInt)
attrs.emplace(attr.name, uint64_t(attr.value->integer));
else
state.debug_throw(TypeError("fetchTree argument '%s' is %s while a string, Boolean or integer is expected",
attr.name, showType(*attr.value)));
{
auto e = TypeError("fetchTree argument '%s' is %s while a string, Boolean or integer is expected",
attr.name, showType(*attr.value));
state.debugLastTrace(e);
throw e;
}
}
if (!params.allowNameArgument)
if (auto nameIter = attrs.find("name"); nameIter != attrs.end())
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("attribute 'name' isn’t supported in call to 'fetchTree'"),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
input = fetchers::Input::fromAttrs(std::move(attrs));
} else {
@ -167,7 +184,11 @@ static void fetchTree(
input = lookupInRegistries(state.store, input).first;
if (evalSettings.pureEval && !input.isLocked())
state.debug_throw(EvalError("in pure evaluation mode, 'fetchTree' requires a locked input, at %s", pos));
{
auto e = EvalError("in pure evaluation mode, 'fetchTree' requires a locked input, at %s", pos);
state.debugLastTrace(e);
throw e;
}
auto [tree, input2] = input.fetch(state.store);
@ -205,18 +226,25 @@ static void fetch(EvalState & state, const Pos & pos, Value * * args, Value & v,
expectedHash = newHashAllowEmpty(state.forceStringNoCtx(*attr.value, *attr.pos), htSHA256);
else if (n == "name")
name = state.forceStringNoCtx(*attr.value, *attr.pos);
else
state.debug_throw(EvalError({
.msg = hintfmt("unsupported argument '%s' to '%s'", attr.name, who),
.errPos = *attr.pos
}));
else {
auto e = EvalError({
.msg = hintfmt("unsupported argument '%s' to '%s'", attr.name, who),
.errPos = *attr.pos
});
state.debugLastTrace(e);
throw e;
}
}
if (!url)
state.debug_throw(EvalError({
{
auto e = EvalError({
.msg = hintfmt("'url' argument required"),
.errPos = pos
}));
});
state.debugLastTrace(e);
throw e;
}
} else
url = state.forceStringNoCtx(*args[0], pos);
@ -228,7 +256,11 @@ static void fetch(EvalState & state, const Pos & pos, Value * * args, Value & v,
name = baseNameOf(*url);
if (evalSettings.pureEval && !expectedHash)
state.debug_throw(EvalError("in pure evaluation mode, '%s' requires a 'sha256' argument", who));
{
auto e = EvalError("in pure evaluation mode, '%s' requires a 'sha256' argument", who);
state.debugLastTrace(e);
throw e;
}
// early exit if pinned and already in the store
if (expectedHash && expectedHash->type == htSHA256) {
@ -255,8 +287,12 @@ static void fetch(EvalState & state, const Pos & pos, Value * * args, Value & v,
? state.store->queryPathInfo(storePath)->narHash
: hashFile(htSHA256, state.store->toRealPath(storePath));
if (hash != *expectedHash)
state.debug_throw(EvalError((unsigned int) 102, "hash mismatch in file downloaded from '%s':\n specified: %s\n got: %s",
*url, expectedHash->to_string(Base32, true), hash.to_string(Base32, true)));
{
auto e = EvalError((unsigned int) 102, "hash mismatch in file downloaded from '%s':\n specified: %s\n got: %s",
*url, expectedHash->to_string(Base32, true), hash.to_string(Base32, true));
state.debugLastTrace(e);
throw e;
}
}
state.allowAndSetStorePathString(storePath, v);

7
src/libexpr/value-to-json.cc
View file

@ -85,7 +85,8 @@ void printValueAsJSON(EvalState & state, bool strict,
.errPos = v.determinePos(pos)
});
e.addTrace(pos, hintfmt("message for the trace"));
state.debug_throw(e);
state.debugLastTrace(e);
throw e;
}
}
@ -99,7 +100,9 @@ void printValueAsJSON(EvalState & state, bool strict,
void ExternalValueBase::printValueAsJSON(EvalState & state, bool strict,
JSONPlaceholder & out, PathSet & context) const
{
state.debug_throw(TypeError("cannot convert %1% to JSON", showType()));
auto e = TypeError("cannot convert %1% to JSON", showType());
state.debugLastTrace(e);
throw e;
}