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-rw-r--r--CMakeLists.txt9
-rw-r--r--absl/container/flat_hash_map_test.cc1
-rw-r--r--absl/container/internal/raw_hash_set.h46
-rw-r--r--absl/container/internal/raw_hash_set_test.cc125
-rw-r--r--absl/memory/memory.h15
-rw-r--r--absl/numeric/int128.cc22
-rw-r--r--absl/numeric/int128_test.cc14
-rw-r--r--absl/strings/string_view.h2
-rw-r--r--absl/time/internal/cctz/BUILD.bazel2
-rw-r--r--absl/time/internal/cctz/include/cctz/civil_time.h2
-rw-r--r--absl/time/internal/cctz/include/cctz/civil_time_detail.h2
-rw-r--r--absl/time/internal/cctz/include/cctz/time_zone.h4
-rw-r--r--absl/time/internal/cctz/include/cctz/zone_info_source.h2
-rw-r--r--absl/time/internal/cctz/src/cctz_benchmark.cc2
-rw-r--r--absl/time/internal/cctz/src/civil_time_detail.cc2
-rw-r--r--absl/time/internal/cctz/src/civil_time_test.cc2
-rw-r--r--absl/time/internal/cctz/src/time_zone_fixed.cc2
-rw-r--r--absl/time/internal/cctz/src/time_zone_fixed.h2
-rw-r--r--absl/time/internal/cctz/src/time_zone_format.cc2
-rw-r--r--absl/time/internal/cctz/src/time_zone_format_test.cc2
-rw-r--r--absl/time/internal/cctz/src/time_zone_if.cc2
-rw-r--r--absl/time/internal/cctz/src/time_zone_if.h2
-rw-r--r--absl/time/internal/cctz/src/time_zone_impl.cc2
-rw-r--r--absl/time/internal/cctz/src/time_zone_impl.h2
-rw-r--r--absl/time/internal/cctz/src/time_zone_info.cc4
-rw-r--r--absl/time/internal/cctz/src/time_zone_info.h2
-rw-r--r--absl/time/internal/cctz/src/time_zone_libc.cc2
-rw-r--r--absl/time/internal/cctz/src/time_zone_libc.h2
-rw-r--r--absl/time/internal/cctz/src/time_zone_lookup.cc14
-rw-r--r--absl/time/internal/cctz/src/time_zone_lookup_test.cc2
-rw-r--r--absl/time/internal/cctz/src/time_zone_posix.cc2
-rw-r--r--absl/time/internal/cctz/src/time_zone_posix.h2
-rw-r--r--absl/time/internal/cctz/src/zone_info_source.cc2
-rw-r--r--absl/time/internal/cctz/testdata/zoneinfo/iso3166.tab2
-rw-r--r--absl/types/any.h2
-rw-r--r--absl/types/optional.h2
-rw-r--r--absl/types/variant.h2
37 files changed, 180 insertions, 128 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt
index a56d238b..571e48c5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,9 +14,12 @@
# limitations under the License.
#
-# We require 3.0 for modern, target-based CMake. We require 3.1 for the use of
-# CXX_STANDARD in our targets.
-cmake_minimum_required(VERSION 3.1)
+# Most widely used distributions have cmake 3.5 or greater available as of March
+# 2019. A notable exception is RHEL-7 (CentOS7). You can install a current
+# version of CMake by first installing Extra Packages for Enterprise Linux
+# (https://fedoraproject.org/wiki/EPEL#Extra_Packages_for_Enterprise_Linux_.28EPEL.29)
+# and then issuing `yum install cmake3` on the command line.
+cmake_minimum_required(VERSION 3.5)
# Compiler id for Apple Clang is now AppleClang.
if (POLICY CMP0025)
diff --git a/absl/container/flat_hash_map_test.cc b/absl/container/flat_hash_map_test.cc
index 562305e4..bae5c15d 100644
--- a/absl/container/flat_hash_map_test.cc
+++ b/absl/container/flat_hash_map_test.cc
@@ -141,6 +141,7 @@ TEST(FlatHashMap, LazyKeyPattern) {
int conversions = 0;
int hashes = 0;
flat_hash_map<size_t, size_t, Hash, Eq> m(0, Hash{&hashes});
+ m.reserve(3);
m[LazyInt(1, &conversions)] = 1;
EXPECT_THAT(m, UnorderedElementsAre(Pair(1, 1)));
diff --git a/absl/container/internal/raw_hash_set.h b/absl/container/internal/raw_hash_set.h
index c4f198bb..85e33344 100644
--- a/absl/container/internal/raw_hash_set.h
+++ b/absl/container/internal/raw_hash_set.h
@@ -446,9 +446,7 @@ using Group = GroupPortableImpl;
template <class Policy, class Hash, class Eq, class Alloc>
class raw_hash_set;
-inline bool IsValidCapacity(size_t n) {
- return ((n + 1) & n) == 0 && n >= Group::kWidth - 1;
-}
+inline bool IsValidCapacity(size_t n) { return ((n + 1) & n) == 0 && n > 0; }
// PRECONDITION:
// IsValidCapacity(capacity)
@@ -470,13 +468,9 @@ inline void ConvertDeletedToEmptyAndFullToDeleted(
ctrl[capacity] = kSentinel;
}
-// Rounds up the capacity to the next power of 2 minus 1 and ensures it is
-// greater or equal to Group::kWidth - 1.
+// Rounds up the capacity to the next power of 2 minus 1, with a minimum of 1.
inline size_t NormalizeCapacity(size_t n) {
- constexpr size_t kMinCapacity = Group::kWidth - 1;
- return n <= kMinCapacity
- ? kMinCapacity
- : (std::numeric_limits<size_t>::max)() >> LeadingZeros(n);
+ return n ? ~size_t{} >> LeadingZeros(n) : 1;
}
// We use 7/8th as maximum load factor.
@@ -1507,6 +1501,7 @@ class raw_hash_set {
void drop_deletes_without_resize() ABSL_ATTRIBUTE_NOINLINE {
assert(IsValidCapacity(capacity_));
+ assert(!is_small());
// Algorithm:
// - mark all DELETED slots as EMPTY
// - mark all FULL slots as DELETED
@@ -1572,7 +1567,7 @@ class raw_hash_set {
void rehash_and_grow_if_necessary() {
if (capacity_ == 0) {
- resize(Group::kWidth - 1);
+ resize(1);
} else if (size() <= CapacityToGrowth(capacity()) / 2) {
// Squash DELETED without growing if there is enough capacity.
drop_deletes_without_resize();
@@ -1619,17 +1614,15 @@ class raw_hash_set {
auto mask = g.MatchEmptyOrDeleted();
if (mask) {
#if !defined(NDEBUG)
- // We want to force small tables to have random entries too, so
- // in debug build we will randomly insert in either the front or back of
+ // We want to add entropy even when ASLR is not enabled.
+ // In debug build we will randomly insert in either the front or back of
// the group.
// TODO(kfm,sbenza): revisit after we do unconditional mixing
- if (ShouldInsertBackwards(hash, ctrl_))
+ if (!is_small() && ShouldInsertBackwards(hash, ctrl_)) {
return {seq.offset(mask.HighestBitSet()), seq.index()};
- else
- return {seq.offset(mask.LowestBitSet()), seq.index()};
-#else
- return {seq.offset(mask.LowestBitSet()), seq.index()};
+ }
#endif
+ return {seq.offset(mask.LowestBitSet()), seq.index()};
}
assert(seq.index() < capacity_ && "full table!");
seq.next();
@@ -1732,11 +1725,28 @@ class raw_hash_set {
}
ctrl_[i] = h;
- ctrl_[((i - Group::kWidth) & capacity_) + Group::kWidth] = h;
+ ctrl_[((i - Group::kWidth) & capacity_) + 1 +
+ ((Group::kWidth - 1) & capacity_)] = h;
}
size_t& growth_left() { return settings_.template get<0>(); }
+ // The representation of the object has two modes:
+ // - small: For capacities < kWidth-1
+ // - large: For the rest.
+ //
+ // Differences:
+ // - In small mode we are able to use the whole capacity. The extra control
+ // bytes give us at least one "empty" control byte to stop the iteration.
+ // This is important to make 1 a valid capacity.
+ //
+ // - In small mode only the first `capacity()` control bytes after the
+ // sentinel are valid. The rest contain dummy kEmpty values that do not
+ // represent a real slot. This is important to take into account on
+ // find_first_non_full(), where we never try ShouldInsertBackwards() for
+ // small tables.
+ bool is_small() const { return capacity_ < Group::kWidth - 1; }
+
hasher& hash_ref() { return settings_.template get<1>(); }
const hasher& hash_ref() const { return settings_.template get<1>(); }
key_equal& eq_ref() { return settings_.template get<2>(); }
diff --git a/absl/container/internal/raw_hash_set_test.cc b/absl/container/internal/raw_hash_set_test.cc
index b684571f..db0bb823 100644
--- a/absl/container/internal/raw_hash_set_test.cc
+++ b/absl/container/internal/raw_hash_set_test.cc
@@ -55,13 +55,16 @@ using ::testing::Pair;
using ::testing::UnorderedElementsAre;
TEST(Util, NormalizeCapacity) {
- constexpr size_t kMinCapacity = Group::kWidth - 1;
- EXPECT_EQ(kMinCapacity, NormalizeCapacity(0));
- EXPECT_EQ(kMinCapacity, NormalizeCapacity(1));
- EXPECT_EQ(kMinCapacity, NormalizeCapacity(2));
- EXPECT_EQ(kMinCapacity, NormalizeCapacity(kMinCapacity));
- EXPECT_EQ(kMinCapacity * 2 + 1, NormalizeCapacity(kMinCapacity + 1));
- EXPECT_EQ(kMinCapacity * 2 + 1, NormalizeCapacity(kMinCapacity + 2));
+ EXPECT_EQ(1, NormalizeCapacity(0));
+ EXPECT_EQ(1, NormalizeCapacity(1));
+ EXPECT_EQ(3, NormalizeCapacity(2));
+ EXPECT_EQ(3, NormalizeCapacity(3));
+ EXPECT_EQ(7, NormalizeCapacity(4));
+ EXPECT_EQ(7, NormalizeCapacity(7));
+ EXPECT_EQ(15, NormalizeCapacity(8));
+ EXPECT_EQ(15, NormalizeCapacity(15));
+ EXPECT_EQ(15 * 2 + 1, NormalizeCapacity(15 + 1));
+ EXPECT_EQ(15 * 2 + 1, NormalizeCapacity(15 + 2));
}
TEST(Util, GrowthAndCapacity) {
@@ -72,10 +75,7 @@ TEST(Util, GrowthAndCapacity) {
size_t capacity = NormalizeCapacity(GrowthToLowerboundCapacity(growth));
// The capacity is large enough for `growth`
EXPECT_THAT(CapacityToGrowth(capacity), Ge(growth));
- if (growth < Group::kWidth - 1) {
- // Fits in one group, that is the minimum capacity.
- EXPECT_EQ(capacity, Group::kWidth - 1);
- } else {
+ if (growth != 0 && capacity > 1) {
// There is no smaller capacity that works.
EXPECT_THAT(CapacityToGrowth(capacity / 2), Lt(growth));
}
@@ -814,7 +814,7 @@ TEST(Table, EnsureNonQuadraticAsInRust) {
TEST(Table, ClearBug) {
IntTable t;
constexpr size_t capacity = container_internal::Group::kWidth - 1;
- constexpr size_t max_size = capacity / 2;
+ constexpr size_t max_size = capacity / 2 + 1;
for (size_t i = 0; i < max_size; ++i) {
t.insert(i);
}
@@ -1741,80 +1741,74 @@ TEST(Nodes, ExtractInsert) {
EXPECT_FALSE(node);
}
-StringTable MakeSimpleTable(size_t size) {
- StringTable t;
- for (size_t i = 0; i < size; ++i) t.emplace(std::string(1, 'A' + i), "");
+IntTable MakeSimpleTable(size_t size) {
+ IntTable t;
+ while (t.size() < size) t.insert(t.size());
return t;
}
-std::string OrderOfIteration(const StringTable& t) {
- std::string order;
- for (auto& p : t) order += p.first;
- return order;
+std::vector<int> OrderOfIteration(const IntTable& t) {
+ return {t.begin(), t.end()};
}
+// These IterationOrderChanges tests depend on non-deterministic behavior.
+// We are injecting non-determinism from the pointer of the table, but do so in
+// a way that only the page matters. We have to retry enough times to make sure
+// we are touching different memory pages to cause the ordering to change.
+// We also need to keep the old tables around to avoid getting the same memory
+// blocks over and over.
TEST(Table, IterationOrderChangesByInstance) {
- // Needs to be more than kWidth elements to be able to affect order.
- const StringTable reference = MakeSimpleTable(20);
-
- // Since order is non-deterministic we can't just try once and verify.
- // We'll try until we find that order changed. It should not take many tries
- // for that.
- // Important: we have to keep the old tables around. Otherwise tcmalloc will
- // just give us the same blocks and we would be doing the same order again.
- std::vector<StringTable> garbage;
- for (int i = 0; i < 10; ++i) {
- auto trial = MakeSimpleTable(20);
- if (OrderOfIteration(trial) != OrderOfIteration(reference)) {
- // We are done.
- return;
+ for (size_t size : {2, 6, 12, 20}) {
+ const auto reference_table = MakeSimpleTable(size);
+ const auto reference = OrderOfIteration(reference_table);
+
+ std::vector<IntTable> tables;
+ bool found_difference = false;
+ for (int i = 0; !found_difference && i < 500; ++i) {
+ tables.push_back(MakeSimpleTable(size));
+ found_difference = OrderOfIteration(tables.back()) != reference;
+ }
+ if (!found_difference) {
+ FAIL()
+ << "Iteration order remained the same across many attempts with size "
+ << size;
}
- garbage.push_back(std::move(trial));
}
- FAIL();
}
TEST(Table, IterationOrderChangesOnRehash) {
- // Since order is non-deterministic we can't just try once and verify.
- // We'll try until we find that order changed. It should not take many tries
- // for that.
- // Important: we have to keep the old tables around. Otherwise tcmalloc will
- // just give us the same blocks and we would be doing the same order again.
- std::vector<StringTable> garbage;
- for (int i = 0; i < 10; ++i) {
- // Needs to be more than kWidth elements to be able to affect order.
- StringTable t = MakeSimpleTable(20);
- const std::string reference = OrderOfIteration(t);
+ std::vector<IntTable> garbage;
+ for (int i = 0; i < 500; ++i) {
+ auto t = MakeSimpleTable(20);
+ const auto reference = OrderOfIteration(t);
// Force rehash to the same size.
t.rehash(0);
- std::string trial = OrderOfIteration(t);
+ auto trial = OrderOfIteration(t);
if (trial != reference) {
// We are done.
return;
}
garbage.push_back(std::move(t));
}
- FAIL();
+ FAIL() << "Iteration order remained the same across many attempts.";
}
-TEST(Table, IterationOrderChangesForSmallTables) {
- // Since order is non-deterministic we can't just try once and verify.
- // We'll try until we find that order changed.
- // Important: we have to keep the old tables around. Otherwise tcmalloc will
- // just give us the same blocks and we would be doing the same order again.
- StringTable reference_table = MakeSimpleTable(5);
- const std::string reference = OrderOfIteration(reference_table);
- std::vector<StringTable> garbage;
- for (int i = 0; i < 50; ++i) {
- StringTable t = MakeSimpleTable(5);
- std::string trial = OrderOfIteration(t);
- if (trial != reference) {
- // We are done.
- return;
- }
- garbage.push_back(std::move(t));
- }
- FAIL() << "Iteration order remained the same across many attempts.";
+// Verify that pointers are invalidated as soon as a second element is inserted.
+// This prevents dependency on pointer stability on small tables.
+TEST(Table, UnstablePointers) {
+ IntTable table;
+
+ const auto addr = [&](int i) {
+ return reinterpret_cast<uintptr_t>(&*table.find(i));
+ };
+
+ table.insert(0);
+ const uintptr_t old_ptr = addr(0);
+
+ // This causes a rehash.
+ table.insert(1);
+
+ EXPECT_NE(old_ptr, addr(0));
}
// Confirm that we assert if we try to erase() end().
@@ -1857,6 +1851,7 @@ TEST(RawHashSamplerTest, Sample) {
#ifdef ADDRESS_SANITIZER
TEST(Sanitizer, PoisoningUnused) {
IntTable t;
+ t.reserve(5);
// Insert something to force an allocation.
int64_t& v1 = *t.insert(0).first;
diff --git a/absl/memory/memory.h b/absl/memory/memory.h
index a0d0714f..5a4a1a1d 100644
--- a/absl/memory/memory.h
+++ b/absl/memory/memory.h
@@ -47,19 +47,14 @@ namespace absl {
// X* NewX(int, int);
// auto x = WrapUnique(NewX(1, 2)); // 'x' is std::unique_ptr<X>.
//
-// The purpose of WrapUnique is to automatically deduce the pointer type. If you
-// wish to make the type explicit, for readability reasons or because you prefer
-// to use a base-class pointer rather than a derived one, just use
+// Do not call WrapUnique with an explicit type, as in
+// `WrapUnique<X>(NewX(1, 2))`. The purpose of WrapUnique is to automatically
+// deduce the pointer type. If you wish to make the type explicit, just use
// `std::unique_ptr` directly.
//
-// Example:
-// X* Factory(int, int);
-// auto x = std::unique_ptr<X>(Factory(1, 2));
+// auto x = std::unique_ptr<X>(NewX(1, 2));
// - or -
-// std::unique_ptr<X> x(Factory(1, 2));
-//
-// This has the added advantage of working whether Factory returns a raw
-// pointer or a `std::unique_ptr`.
+// std::unique_ptr<X> x(NewX(1, 2));
//
// While `absl::WrapUnique` is useful for capturing the output of a raw
// pointer factory, prefer 'absl::make_unique<T>(args...)' over
diff --git a/absl/numeric/int128.cc b/absl/numeric/int128.cc
index 33f528ce..93b62c52 100644
--- a/absl/numeric/int128.cc
+++ b/absl/numeric/int128.cc
@@ -123,6 +123,28 @@ uint128 MakeUint128FromFloat(T v) {
return MakeUint128(0, static_cast<uint64_t>(v));
}
+
+#if defined(__clang__) && !defined(__SSE3__)
+// Workaround for clang bug: https://bugs.llvm.org/show_bug.cgi?id=38289
+// Casting from long double to uint64_t is miscompiled and drops bits.
+// It is more work, so only use when we need the workaround.
+uint128 MakeUint128FromFloat(long double v) {
+ // Go 50 bits at a time, that fits in a double
+ static_assert(std::numeric_limits<double>::digits >= 50, "");
+ static_assert(std::numeric_limits<long double>::digits <= 150, "");
+ // Undefined behavior if v is not finite or cannot fit into uint128.
+ assert(std::isfinite(v) && v > -1 && v < std::ldexp(1.0L, 128));
+
+ v = std::ldexp(v, -100);
+ uint64_t w0 = static_cast<uint64_t>(static_cast<double>(std::trunc(v)));
+ v = std::ldexp(v - static_cast<double>(w0), 50);
+ uint64_t w1 = static_cast<uint64_t>(static_cast<double>(std::trunc(v)));
+ v = std::ldexp(v - static_cast<double>(w1), 50);
+ uint64_t w2 = static_cast<uint64_t>(static_cast<double>(std::trunc(v)));
+ return (static_cast<uint128>(w0) << 100) | (static_cast<uint128>(w1) << 50) |
+ static_cast<uint128>(w2);
+}
+#endif // __clang__ && !__SSE3__
} // namespace
uint128::uint128(float v) : uint128(MakeUint128FromFloat(v)) {}
diff --git a/absl/numeric/int128_test.cc b/absl/numeric/int128_test.cc
index 216ec50c..5e1b5ec3 100644
--- a/absl/numeric/int128_test.cc
+++ b/absl/numeric/int128_test.cc
@@ -271,6 +271,20 @@ TEST(Uint128, ConversionTests) {
EXPECT_EQ(static_cast<absl::uint128>(round_to_zero), 0);
EXPECT_EQ(static_cast<absl::uint128>(round_to_five), 5);
EXPECT_EQ(static_cast<absl::uint128>(round_to_nine), 9);
+
+ absl::uint128 highest_precision_in_long_double =
+ ~absl::uint128{} >> (128 - std::numeric_limits<long double>::digits);
+ EXPECT_EQ(highest_precision_in_long_double,
+ static_cast<absl::uint128>(
+ static_cast<long double>(highest_precision_in_long_double)));
+ // Apply a mask just to make sure all the bits are the right place.
+ const absl::uint128 arbitrary_mask =
+ absl::MakeUint128(0xa29f622677ded751, 0xf8ca66add076f468);
+ EXPECT_EQ(highest_precision_in_long_double & arbitrary_mask,
+ static_cast<absl::uint128>(static_cast<long double>(
+ highest_precision_in_long_double & arbitrary_mask)));
+
+ EXPECT_EQ(static_cast<absl::uint128>(-0.1L), 0);
}
TEST(Uint128, OperatorAssignReturnRef) {
diff --git a/absl/strings/string_view.h b/absl/strings/string_view.h
index 524dbebb..bd894e1d 100644
--- a/absl/strings/string_view.h
+++ b/absl/strings/string_view.h
@@ -32,7 +32,7 @@
#ifdef ABSL_HAVE_STD_STRING_VIEW
-#include <string_view>
+#include <string_view> // IWYU pragma: export
namespace absl {
using std::string_view;
diff --git a/absl/time/internal/cctz/BUILD.bazel b/absl/time/internal/cctz/BUILD.bazel
index 1fb33c20..903499be 100644
--- a/absl/time/internal/cctz/BUILD.bazel
+++ b/absl/time/internal/cctz/BUILD.bazel
@@ -4,7 +4,7 @@
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
-# http://www.apache.org/licenses/LICENSE-2.0
+# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/include/cctz/civil_time.h b/absl/time/internal/cctz/include/cctz/civil_time.h
index 0842fa4a..f844182b 100644
--- a/absl/time/internal/cctz/include/cctz/civil_time.h
+++ b/absl/time/internal/cctz/include/cctz/civil_time.h
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/include/cctz/civil_time_detail.h b/absl/time/internal/cctz/include/cctz/civil_time_detail.h
index 1c5d0970..a5923f13 100644
--- a/absl/time/internal/cctz/include/cctz/civil_time_detail.h
+++ b/absl/time/internal/cctz/include/cctz/civil_time_detail.h
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/include/cctz/time_zone.h b/absl/time/internal/cctz/include/cctz/time_zone.h
index f28dad17..ef6c4ba1 100644
--- a/absl/time/internal/cctz/include/cctz/time_zone.h
+++ b/absl/time/internal/cctz/include/cctz/time_zone.h
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
@@ -72,7 +72,7 @@ split_seconds(const time_point<seconds>& tp) {
//
// See also:
// - http://www.iana.org/time-zones
-// - http://en.wikipedia.org/wiki/Zoneinfo
+// - https://en.wikipedia.org/wiki/Zoneinfo
class time_zone {
public:
time_zone() : time_zone(nullptr) {} // Equivalent to UTC
diff --git a/absl/time/internal/cctz/include/cctz/zone_info_source.h b/absl/time/internal/cctz/include/cctz/zone_info_source.h
index 20a76979..2b898d18 100644
--- a/absl/time/internal/cctz/include/cctz/zone_info_source.h
+++ b/absl/time/internal/cctz/include/cctz/zone_info_source.h
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/src/cctz_benchmark.cc b/absl/time/internal/cctz/src/cctz_benchmark.cc
index a00f47bf..445366ea 100644
--- a/absl/time/internal/cctz/src/cctz_benchmark.cc
+++ b/absl/time/internal/cctz/src/cctz_benchmark.cc
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/src/civil_time_detail.cc b/absl/time/internal/cctz/src/civil_time_detail.cc
index 780d5c96..cb40b6bc 100644
--- a/absl/time/internal/cctz/src/civil_time_detail.cc
+++ b/absl/time/internal/cctz/src/civil_time_detail.cc
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/src/civil_time_test.cc b/absl/time/internal/cctz/src/civil_time_test.cc
index faffde47..e590ee30 100644
--- a/absl/time/internal/cctz/src/civil_time_test.cc
+++ b/absl/time/internal/cctz/src/civil_time_test.cc
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/src/time_zone_fixed.cc b/absl/time/internal/cctz/src/time_zone_fixed.cc
index db9a475a..81ece72b 100644
--- a/absl/time/internal/cctz/src/time_zone_fixed.cc
+++ b/absl/time/internal/cctz/src/time_zone_fixed.cc
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/src/time_zone_fixed.h b/absl/time/internal/cctz/src/time_zone_fixed.h
index 489b857d..9c1f5e7d 100644
--- a/absl/time/internal/cctz/src/time_zone_fixed.h
+++ b/absl/time/internal/cctz/src/time_zone_fixed.h
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/src/time_zone_format.cc b/absl/time/internal/cctz/src/time_zone_format.cc
index a5c72df8..25850980 100644
--- a/absl/time/internal/cctz/src/time_zone_format.cc
+++ b/absl/time/internal/cctz/src/time_zone_format.cc
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/src/time_zone_format_test.cc b/absl/time/internal/cctz/src/time_zone_format_test.cc
index b99e1c63..705ccdcd 100644
--- a/absl/time/internal/cctz/src/time_zone_format_test.cc
+++ b/absl/time/internal/cctz/src/time_zone_format_test.cc
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/src/time_zone_if.cc b/absl/time/internal/cctz/src/time_zone_if.cc
index 380834a1..09aaee5f 100644
--- a/absl/time/internal/cctz/src/time_zone_if.cc
+++ b/absl/time/internal/cctz/src/time_zone_if.cc
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/src/time_zone_if.h b/absl/time/internal/cctz/src/time_zone_if.h
index e4bd3866..d000b7a5 100644
--- a/absl/time/internal/cctz/src/time_zone_if.h
+++ b/absl/time/internal/cctz/src/time_zone_if.h
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/src/time_zone_impl.cc b/absl/time/internal/cctz/src/time_zone_impl.cc
index 3062ccd3..3cbc6746 100644
--- a/absl/time/internal/cctz/src/time_zone_impl.cc
+++ b/absl/time/internal/cctz/src/time_zone_impl.cc
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/src/time_zone_impl.h b/absl/time/internal/cctz/src/time_zone_impl.h
index 14965ef5..b73fad9b 100644
--- a/absl/time/internal/cctz/src/time_zone_impl.h
+++ b/absl/time/internal/cctz/src/time_zone_impl.h
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/src/time_zone_info.cc b/absl/time/internal/cctz/src/time_zone_info.cc
index 6aa80ff6..50f7de54 100644
--- a/absl/time/internal/cctz/src/time_zone_info.cc
+++ b/absl/time/internal/cctz/src/time_zone_info.cc
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
@@ -25,7 +25,7 @@
// a grain of salt.
//
// For more information see tzfile(5), http://www.iana.org/time-zones, or
-// http://en.wikipedia.org/wiki/Zoneinfo.
+// https://en.wikipedia.org/wiki/Zoneinfo.
//
// Note that we assume the proleptic Gregorian calendar and 60-second
// minutes throughout.
diff --git a/absl/time/internal/cctz/src/time_zone_info.h b/absl/time/internal/cctz/src/time_zone_info.h
index 958e9b6b..bff639f4 100644
--- a/absl/time/internal/cctz/src/time_zone_info.h
+++ b/absl/time/internal/cctz/src/time_zone_info.h
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/src/time_zone_libc.cc b/absl/time/internal/cctz/src/time_zone_libc.cc
index 28291708..3ab1623c 100644
--- a/absl/time/internal/cctz/src/time_zone_libc.cc
+++ b/absl/time/internal/cctz/src/time_zone_libc.cc
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/src/time_zone_libc.h b/absl/time/internal/cctz/src/time_zone_libc.h
index 4e40c61a..0d18e9a7 100644
--- a/absl/time/internal/cctz/src/time_zone_libc.h
+++ b/absl/time/internal/cctz/src/time_zone_libc.h
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/src/time_zone_lookup.cc b/absl/time/internal/cctz/src/time_zone_lookup.cc
index f2d151e4..4a68c7d5 100644
--- a/absl/time/internal/cctz/src/time_zone_lookup.cc
+++ b/absl/time/internal/cctz/src/time_zone_lookup.cc
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
@@ -20,6 +20,11 @@
#include <dlfcn.h>
#endif
#endif
+
+#if defined(__APPLE__)
+#include <CoreFoundation/CFTimeZone.h>
+#endif
+
#include <cstdlib>
#include <cstring>
#include <string>
@@ -121,6 +126,11 @@ time_zone local_time_zone() {
char* tz_env = nullptr;
#if defined(_MSC_VER)
_dupenv_s(&tz_env, nullptr, "TZ");
+#elif defined(__APPLE__)
+ CFTimeZoneRef system_time_zone = CFTimeZoneCopySystem();
+ CFStringRef tz_name = CFTimeZoneGetName(system_time_zone);
+ tz_env = strdup(CFStringGetCStringPtr(tz_name, CFStringGetSystemEncoding()));
+ CFRelease(system_time_zone);
#else
tz_env = std::getenv("TZ");
#endif
@@ -153,6 +163,8 @@ time_zone local_time_zone() {
#if defined(_MSC_VER)
free(localtime_env);
free(tz_env);
+#elif defined(__APPLE__)
+ free(tz_env);
#endif
time_zone tz;
diff --git a/absl/time/internal/cctz/src/time_zone_lookup_test.cc b/absl/time/internal/cctz/src/time_zone_lookup_test.cc
index 2e49e48c..8068e2fc 100644
--- a/absl/time/internal/cctz/src/time_zone_lookup_test.cc
+++ b/absl/time/internal/cctz/src/time_zone_lookup_test.cc
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/src/time_zone_posix.cc b/absl/time/internal/cctz/src/time_zone_posix.cc
index 75ad8bcb..993901ac 100644
--- a/absl/time/internal/cctz/src/time_zone_posix.cc
+++ b/absl/time/internal/cctz/src/time_zone_posix.cc
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/src/time_zone_posix.h b/absl/time/internal/cctz/src/time_zone_posix.h
index ef2a8c16..6a60022f 100644
--- a/absl/time/internal/cctz/src/time_zone_posix.h
+++ b/absl/time/internal/cctz/src/time_zone_posix.h
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/src/zone_info_source.cc b/absl/time/internal/cctz/src/zone_info_source.cc
index 1bc16aec..13248462 100644
--- a/absl/time/internal/cctz/src/zone_info_source.cc
+++ b/absl/time/internal/cctz/src/zone_info_source.cc
@@ -4,7 +4,7 @@
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
-// http://www.apache.org/licenses/LICENSE-2.0
+// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/iso3166.tab b/absl/time/internal/cctz/testdata/zoneinfo/iso3166.tab
index c2e0f8ea..4e4a5c3d 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/iso3166.tab
+++ b/absl/time/internal/cctz/testdata/zoneinfo/iso3166.tab
@@ -10,7 +10,7 @@
#
# 1. ISO 3166-1 alpha-2 country code, current as of
# ISO 3166-1 N905 (2016-11-15). See: Updates on ISO 3166-1
-# http://isotc.iso.org/livelink/livelink/Open/16944257
+# https://isotc.iso.org/livelink/livelink/Open/16944257
# 2. The usual English name for the coded region,
# chosen so that alphabetic sorting of subsets produces helpful lists.
# This is not the same as the English name in the ISO 3166 tables.
diff --git a/absl/types/any.h b/absl/types/any.h
index e750f485..f3a32812 100644
--- a/absl/types/any.h
+++ b/absl/types/any.h
@@ -58,7 +58,7 @@
#ifdef ABSL_HAVE_STD_ANY
-#include <any>
+#include <any> // IWYU pragma: export
namespace absl {
using std::any;
diff --git a/absl/types/optional.h b/absl/types/optional.h
index 0c1213f4..a86dea92 100644
--- a/absl/types/optional.h
+++ b/absl/types/optional.h
@@ -40,7 +40,7 @@
#ifdef ABSL_HAVE_STD_OPTIONAL
-#include <optional>
+#include <optional> // IWYU pragma: export
namespace absl {
using std::bad_optional_access;
diff --git a/absl/types/variant.h b/absl/types/variant.h
index 9652e3b9..8d8b5dbd 100644
--- a/absl/types/variant.h
+++ b/absl/types/variant.h
@@ -47,7 +47,7 @@
#ifdef ABSL_HAVE_STD_VARIANT
-#include <variant>
+#include <variant> // IWYU pragma: export
namespace absl {
using std::bad_variant_access;