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DebugTrace

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This commit is contained in:
Ben Burdette 2021-12-23 13:36:39 -07:00
parent deb1fd66e8
commit e5eebda194
5 changed files with 29 additions and 18 deletions
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2
src/libcmd/command.cc
View file

@ -84,7 +84,7 @@ ref<EvalState> EvalCommand::getEvalState()
if (expr.staticenv)
{
auto vm = mapStaticEnvBindings(*expr.staticenv.get(), env);
runRepl(evalState, ref<const Error>(&error), *vm);
runRepl(evalState, &error, *vm);
}
};
}

4
src/libcmd/command.hh
View file

@ -314,8 +314,6 @@ void printClosureDiff(
void runRepl(
ref<EvalState> evalState,
std::optional<ref<const Error>> debugError,
const Error *debugError,
const std::map<std::string, Value *> & extraEnv);
}

11
src/libcmd/repl.cc
View file

@ -50,7 +50,7 @@ struct NixRepl
ref<EvalState> state;
Bindings * autoArgs;
std::optional<ref<const Error>> debugError;
const Error *debugError;
Strings loadedFiles;
@ -470,13 +470,12 @@ bool NixRepl::processLine(string line)
}
else if (arg == "error") {
if (this->debugError.has_value()) {
// TODO user --show-trace setting?
showErrorInfo(std::cout, (*debugError)->info(), true);
if (this->debugError) {
showErrorInfo(std::cout, debugError->info(), true);
}
else
{
notice("error information not available");
notice("error information not available");
}
}
}
@ -893,7 +892,7 @@ std::ostream & NixRepl::printValue(std::ostream & str, Value & v, unsigned int m
void runRepl(
ref<EvalState> evalState,
std::optional<ref<const Error>> debugError,
const Error *debugError,
const std::map<std::string, Value *> & extraEnv)
{
auto repl = std::make_unique<NixRepl>(evalState);

22
src/libexpr/eval.cc
View file

@ -40,7 +40,7 @@ std::function<void(const Error & error, const Env & env, const Expr & expr)> deb
class DebugTraceStacker {
public:
DebugTraceStacker(EvalState &evalState, Trace t)
DebugTraceStacker(EvalState &evalState, DebugTrace t)
:evalState(evalState), trace(t)
{
evalState.debugTraces.push_front(t);
@ -50,7 +50,7 @@ class DebugTraceStacker {
evalState.debugTraces.pop_front();
}
EvalState &evalState;
Trace trace;
DebugTrace trace;
};
static char * dupString(const char * s)
@ -911,12 +911,14 @@ LocalNoInline(void addErrorTrace(Error & e, const Pos & pos, const char * s, con
}
LocalNoInline(std::unique_ptr<DebugTraceStacker>
makeDebugTraceStacker(EvalState &state, std::optional<ErrPos> pos, const char * s, const string & s2))
makeDebugTraceStacker(EvalState &state, Expr &expr, std::optional<ErrPos> pos, const char * s, const string & s2))
{
return std::unique_ptr<DebugTraceStacker>(
new DebugTraceStacker(
state,
Trace {.pos = pos,
DebugTrace
{.pos = pos,
.expr = expr,
.hint = hintfmt(s, s2)
}));
}
@ -1143,6 +1145,7 @@ void EvalState::cacheFile(
debuggerHook ?
makeDebugTraceStacker(
*this,
*e,
(e->getPos() ? std::optional(ErrPos(*e->getPos())) : std::nullopt),
"while evaluating the file '%1%':", resolvedPath)
: std::unique_ptr<DebugTraceStacker>();
@ -1375,6 +1378,7 @@ void ExprSelect::eval(EvalState & state, Env & env, Value & v)
debuggerHook ?
makeDebugTraceStacker(
state,
*this,
*pos2,
"while evaluating the attribute '%1%'",
showAttrPath(state, env, attrPath))
@ -1524,7 +1528,7 @@ void EvalState::callFunction(Value & fun, size_t nrArgs, Value * * args, Value &
try {
std::unique_ptr<DebugTraceStacker> dts =
debuggerHook ?
makeDebugTraceStacker(*this, lambda.pos,
makeDebugTraceStacker(*this, *lambda.body, lambda.pos,
"while evaluating %s",
(lambda.name.set()
? "'" + (string) lambda.name + "'"
@ -1925,10 +1929,14 @@ void EvalState::forceValueDeep(Value & v)
if (v.type() == nAttrs) {
for (auto & i : *v.attrs)
try {
std::unique_ptr<DebugTraceStacker> dts =
debuggerHook ?
makeDebugTraceStacker(*this, *i.pos,
"while evaluating the attribute '%1%'", i.name)
// if the value is a thunk, we're evaling. otherwise no trace necessary.
(i.value->isThunk() ?
makeDebugTraceStacker(*this, *v.thunk.expr, *i.pos,
"while evaluating the attribute '%1%'", i.name)
: std::unique_ptr<DebugTraceStacker>())
: std::unique_ptr<DebugTraceStacker>();
recurse(*i.value);

8
src/libexpr/eval.hh
View file

@ -74,6 +74,12 @@ struct RegexCache;
std::shared_ptr<RegexCache> makeRegexCache();
struct DebugTrace {
std::optional<ErrPos> pos;
Expr &expr;
hintformat hint;
};
class EvalState
{
@ -109,7 +115,7 @@ public:
RootValue vCallFlake = nullptr;
RootValue vImportedDrvToDerivation = nullptr;
std::list<Trace> debugTraces;
std::list<DebugTrace> debugTraces;
private:
SrcToStore srcToStore;