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Merge remote-tracking branch 'origin/2.29-maintenance' into detsys-main

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This commit is contained in:
Eelco Dolstra 2025-05-16 12:48:44 +02:00
commit c20642ac7b
354 changed files with 6768 additions and 3808 deletions
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116
src/libexpr/primops.cc
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@ -98,7 +98,7 @@ StringMap EvalState::realiseContext(const NixStringContext & context, StorePathS
if (drvs.empty()) return {};
if (isIFD && !settings.enableImportFromDerivation)
error<EvalBaseError>(
error<IFDError>(
"cannot build '%1%' during evaluation because the option 'allow-import-from-derivation' is disabled",
drvs.begin()->to_string(*store)
).debugThrow();
@ -895,18 +895,40 @@ static void prim_ceil(EvalState & state, const PosIdx pos, Value * * args, Value
{
auto value = state.forceFloat(*args[0], args[0]->determinePos(pos),
"while evaluating the first argument passed to builtins.ceil");
v.mkInt(ceil(value));
auto ceilValue = ceil(value);
bool isInt = args[0]->type() == nInt;
constexpr NixFloat int_min = std::numeric_limits<NixInt::Inner>::min(); // power of 2, so that no rounding occurs
if (ceilValue >= int_min && ceilValue < -int_min) {
v.mkInt(ceilValue);
} else if (isInt) {
// a NixInt, e.g. INT64_MAX, can be rounded to -int_min due to the cast to NixFloat
state.error<EvalError>("Due to a bug (see https://github.com/NixOS/nix/issues/12899) the NixInt argument %1% caused undefined behavior in previous Nix versions.\n\tFuture Nix versions might implement the correct behavior.", args[0]->integer().value).atPos(pos).debugThrow();
} else {
state.error<EvalError>("NixFloat argument %1% is not in the range of NixInt", args[0]->fpoint()).atPos(pos).debugThrow();
}
// `forceFloat` casts NixInt to NixFloat, but instead NixInt args shall be returned unmodified
if (isInt) {
auto arg = args[0]->integer();
auto res = v.integer();
if (arg != res) {
state.error<EvalError>("Due to a bug (see https://github.com/NixOS/nix/issues/12899) a loss of precision occured in previous Nix versions because the NixInt argument %1% was rounded to %2%.\n\tFuture Nix versions might implement the correct behavior.", arg, res).atPos(pos).debugThrow();
}
}
}
static RegisterPrimOp primop_ceil({
.name = "__ceil",
.args = {"double"},
.args = {"number"},
.doc = R"(
Converts an IEEE-754 double-precision floating-point number (*double*) to
the next higher integer.
Rounds and converts *number* to the next higher NixInt value if possible, i.e. `ceil *number* >= *number*` and
`ceil *number* - *number* < 1`.
If the datatype is neither an integer nor a "float", an evaluation error will be
thrown.
An evaluation error is thrown, if there exists no such NixInt value `ceil *number*`.
Due to bugs in previous Nix versions an evaluation error might be thrown, if the datatype of *number* is
a NixInt and if `*number* < -9007199254740992` or `*number* > 9007199254740992`.
If the datatype of *number* is neither a NixInt (signed 64-bit integer) nor a NixFloat
(IEEE-754 double-precision floating-point number), an evaluation error will be thrown.
)",
.fun = prim_ceil,
});
@ -914,18 +936,40 @@ static RegisterPrimOp primop_ceil({
static void prim_floor(EvalState & state, const PosIdx pos, Value * * args, Value & v)
{
auto value = state.forceFloat(*args[0], args[0]->determinePos(pos), "while evaluating the first argument passed to builtins.floor");
v.mkInt(floor(value));
auto floorValue = floor(value);
bool isInt = args[0]->type() == nInt;
constexpr NixFloat int_min = std::numeric_limits<NixInt::Inner>::min(); // power of 2, so that no rounding occurs
if (floorValue >= int_min && floorValue < -int_min) {
v.mkInt(floorValue);
} else if (isInt) {
// a NixInt, e.g. INT64_MAX, can be rounded to -int_min due to the cast to NixFloat
state.error<EvalError>("Due to a bug (see https://github.com/NixOS/nix/issues/12899) the NixInt argument %1% caused undefined behavior in previous Nix versions.\n\tFuture Nix versions might implement the correct behavior.", args[0]->integer().value).atPos(pos).debugThrow();
} else {
state.error<EvalError>("NixFloat argument %1% is not in the range of NixInt", args[0]->fpoint()).atPos(pos).debugThrow();
}
// `forceFloat` casts NixInt to NixFloat, but instead NixInt args shall be returned unmodified
if (isInt) {
auto arg = args[0]->integer();
auto res = v.integer();
if (arg != res) {
state.error<EvalError>("Due to a bug (see https://github.com/NixOS/nix/issues/12899) a loss of precision occured in previous Nix versions because the NixInt argument %1% was rounded to %2%.\n\tFuture Nix versions might implement the correct behavior.", arg, res).atPos(pos).debugThrow();
}
}
}
static RegisterPrimOp primop_floor({
.name = "__floor",
.args = {"double"},
.args = {"number"},
.doc = R"(
Converts an IEEE-754 double-precision floating-point number (*double*) to
the next lower integer.
Rounds and converts *number* to the next lower NixInt value if possible, i.e. `floor *number* <= *number*` and
`*number* - floor *number* < 1`.
If the datatype is neither an integer nor a "float", an evaluation error will be
thrown.
An evaluation error is thrown, if there exists no such NixInt value `floor *number*`.
Due to bugs in previous Nix versions an evaluation error might be thrown, if the datatype of *number* is
a NixInt and if `*number* < -9007199254740992` or `*number* > 9007199254740992`.
If the datatype of *number* is neither a NixInt (signed 64-bit integer) nor a NixFloat
(IEEE-754 double-precision floating-point number), an evaluation error will be thrown.
)",
.fun = prim_floor,
});
@ -2813,7 +2857,13 @@ static void prim_unsafeGetAttrPos(EvalState & state, const PosIdx pos, Value * *
static RegisterPrimOp primop_unsafeGetAttrPos(PrimOp {
.name = "__unsafeGetAttrPos",
.args = {"s", "set"},
.arity = 2,
.doc = R"(
`unsafeGetAttrPos` returns the position of the attribute named *s*
from *set*. This is used by Nixpkgs to provide location information
in error messages.
)",
.fun = prim_unsafeGetAttrPos,
});
@ -4299,9 +4349,7 @@ struct RegexCache
{
struct State
{
// TODO use C++20 transparent comparison when available
std::unordered_map<std::string_view, std::regex> cache;
std::list<std::string> keys;
std::unordered_map<std::string, std::regex, StringViewHash, std::equal_to<>> cache;
};
Sync<State> state_;
@ -4312,8 +4360,14 @@ struct RegexCache
auto it = state->cache.find(re);
if (it != state->cache.end())
return it->second;
state->keys.emplace_back(re);
return state->cache.emplace(state->keys.back(), std::regex(state->keys.back(), std::regex::extended)).first->second;
/* No std::regex constructor overload from std::string_view, but can be constructed
from a pointer + size or an iterator range. */
return state->cache
.emplace(
std::piecewise_construct,
std::forward_as_tuple(re),
std::forward_as_tuple(/*s=*/re.data(), /*count=*/re.size(), std::regex::extended))
.first->second;
}
};
@ -4697,13 +4751,9 @@ static RegisterPrimOp primop_splitVersion({
*************************************************************/
RegisterPrimOp::PrimOps * RegisterPrimOp::primOps;
RegisterPrimOp::RegisterPrimOp(PrimOp && primOp)
{
if (!primOps) primOps = new PrimOps;
primOps->push_back(std::move(primOp));
primOps().push_back(std::move(primOp));
}
@ -4957,14 +5007,18 @@ void EvalState::createBaseEnv(const EvalSettings & evalSettings)
)",
});
if (RegisterPrimOp::primOps)
for (auto & primOp : *RegisterPrimOp::primOps)
if (experimentalFeatureSettings.isEnabled(primOp.experimentalFeature))
{
auto primOpAdjusted = primOp;
primOpAdjusted.arity = std::max(primOp.args.size(), primOp.arity);
addPrimOp(std::move(primOpAdjusted));
}
for (auto & primOp : RegisterPrimOp::primOps())
if (experimentalFeatureSettings.isEnabled(primOp.experimentalFeature)) {
auto primOpAdjusted = primOp;
primOpAdjusted.arity = std::max(primOp.args.size(), primOp.arity);
addPrimOp(std::move(primOpAdjusted));
}
for (auto & primOp : evalSettings.extraPrimOps) {
auto primOpAdjusted = primOp;
primOpAdjusted.arity = std::max(primOp.args.size(), primOp.arity);
addPrimOp(std::move(primOpAdjusted));
}
for (auto & primOp : evalSettings.extraPrimOps) {
auto primOpAdjusted = primOp;