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-rw-r--r--absl/base/internal/spinlock.cc19
-rw-r--r--absl/base/internal/spinlock.h13
-rw-r--r--absl/base/macros.h35
-rw-r--r--absl/base/options.h33
-rw-r--r--absl/container/BUILD.bazel2
-rw-r--r--absl/container/CMakeLists.txt2
-rw-r--r--absl/container/fixed_array.h24
-rw-r--r--absl/container/fixed_array_test.cc16
-rw-r--r--absl/container/inlined_vector.h49
-rw-r--r--absl/container/inlined_vector_test.cc11
-rw-r--r--absl/copts/configure_copts.bzl4
-rw-r--r--absl/flags/internal/flag.cc131
-rw-r--r--absl/flags/internal/flag.h166
-rw-r--r--absl/strings/string_view.h12
-rw-r--r--absl/strings/string_view_test.cc5
-rw-r--r--absl/synchronization/mutex.cc5
-rw-r--r--absl/types/optional.h12
-rw-r--r--absl/types/optional_test.cc6
-rw-r--r--absl/types/span.h14
-rw-r--r--absl/types/span_test.cc10
20 files changed, 352 insertions, 217 deletions
diff --git a/absl/base/internal/spinlock.cc b/absl/base/internal/spinlock.cc
index 830d4729..fd0c733e 100644
--- a/absl/base/internal/spinlock.cc
+++ b/absl/base/internal/spinlock.cc
@@ -190,30 +190,32 @@ void SpinLock::SlowUnlock(uint32_t lock_value) {
// We use the upper 29 bits of the lock word to store the time spent waiting to
// acquire this lock. This is reported by contentionz profiling. Since the
// lower bits of the cycle counter wrap very quickly on high-frequency
-// processors we divide to reduce the granularity to 2^PROFILE_TIMESTAMP_SHIFT
+// processors we divide to reduce the granularity to 2^kProfileTimestampShift
// sized units. On a 4Ghz machine this will lose track of wait times greater
// than (2^29/4 Ghz)*128 =~ 17.2 seconds. Such waits should be extremely rare.
-enum { PROFILE_TIMESTAMP_SHIFT = 7 };
-enum { LOCKWORD_RESERVED_SHIFT = 3 }; // We currently reserve the lower 3 bits.
+static constexpr int kProfileTimestampShift = 7;
+
+// We currently reserve the lower 3 bits.
+static constexpr int kLockwordReservedShift = 3;
uint32_t SpinLock::EncodeWaitCycles(int64_t wait_start_time,
int64_t wait_end_time) {
static const int64_t kMaxWaitTime =
- std::numeric_limits<uint32_t>::max() >> LOCKWORD_RESERVED_SHIFT;
+ std::numeric_limits<uint32_t>::max() >> kLockwordReservedShift;
int64_t scaled_wait_time =
- (wait_end_time - wait_start_time) >> PROFILE_TIMESTAMP_SHIFT;
+ (wait_end_time - wait_start_time) >> kProfileTimestampShift;
// Return a representation of the time spent waiting that can be stored in
// the lock word's upper bits.
uint32_t clamped = static_cast<uint32_t>(
- std::min(scaled_wait_time, kMaxWaitTime) << LOCKWORD_RESERVED_SHIFT);
+ std::min(scaled_wait_time, kMaxWaitTime) << kLockwordReservedShift);
if (clamped == 0) {
return kSpinLockSleeper; // Just wake waiters, but don't record contention.
}
// Bump up value if necessary to avoid returning kSpinLockSleeper.
const uint32_t kMinWaitTime =
- kSpinLockSleeper + (1 << LOCKWORD_RESERVED_SHIFT);
+ kSpinLockSleeper + (1 << kLockwordReservedShift);
if (clamped == kSpinLockSleeper) {
return kMinWaitTime;
}
@@ -224,8 +226,7 @@ uint64_t SpinLock::DecodeWaitCycles(uint32_t lock_value) {
// Cast to uint32_t first to ensure bits [63:32] are cleared.
const uint64_t scaled_wait_time =
static_cast<uint32_t>(lock_value & kWaitTimeMask);
- return scaled_wait_time
- << (PROFILE_TIMESTAMP_SHIFT - LOCKWORD_RESERVED_SHIFT);
+ return scaled_wait_time << (kProfileTimestampShift - kLockwordReservedShift);
}
} // namespace base_internal
diff --git a/absl/base/internal/spinlock.h b/absl/base/internal/spinlock.h
index 24e2e9a6..89e93aad 100644
--- a/absl/base/internal/spinlock.h
+++ b/absl/base/internal/spinlock.h
@@ -148,12 +148,13 @@ class ABSL_LOCKABLE SpinLock {
// bit[1] encodes whether a lock uses cooperative scheduling.
// bit[2] encodes whether a lock disables scheduling.
// bit[3:31] encodes time a lock spent on waiting as a 29-bit unsigned int.
- enum { kSpinLockHeld = 1 };
- enum { kSpinLockCooperative = 2 };
- enum { kSpinLockDisabledScheduling = 4 };
- enum { kSpinLockSleeper = 8 };
- enum { kWaitTimeMask = // Includes kSpinLockSleeper.
- ~(kSpinLockHeld | kSpinLockCooperative | kSpinLockDisabledScheduling) };
+ static constexpr uint32_t kSpinLockHeld = 1;
+ static constexpr uint32_t kSpinLockCooperative = 2;
+ static constexpr uint32_t kSpinLockDisabledScheduling = 4;
+ static constexpr uint32_t kSpinLockSleeper = 8;
+ // Includes kSpinLockSleeper.
+ static constexpr uint32_t kWaitTimeMask =
+ ~(kSpinLockHeld | kSpinLockCooperative | kSpinLockDisabledScheduling);
// Returns true if the provided scheduling mode is cooperative.
static constexpr bool IsCooperative(
diff --git a/absl/base/macros.h b/absl/base/macros.h
index 547f93ba..2f6089f4 100644
--- a/absl/base/macros.h
+++ b/absl/base/macros.h
@@ -32,6 +32,7 @@
#include <cstddef>
#include "absl/base/attributes.h"
+#include "absl/base/config.h"
#include "absl/base/optimization.h"
#include "absl/base/port.h"
@@ -207,6 +208,40 @@ ABSL_NAMESPACE_END
: [] { assert(false && #expr); }()) // NOLINT
#endif
+// `ABSL_INTERNAL_HARDENING_ABORT()` controls how `ABSL_HARDENING_ASSERT()`
+// aborts the program in release mode (when NDEBUG is defined). The
+// implementation should abort the program as quickly as possible and ideally it
+// should not be possible to ignore the abort request.
+#if ABSL_HAVE_BUILTIN(__builtin_trap) || \
+ (defined(__GNUC__) && !defined(__clang__))
+#define ABSL_INTERNAL_HARDENING_ABORT() \
+ do { \
+ __builtin_trap(); \
+ __builtin_unreachable(); \
+ } while (false)
+#else
+#define ABSL_INTERNAL_HARDENING_ABORT() abort()
+#endif
+
+// ABSL_HARDENING_ASSERT()
+//
+// `ABSL_HARDENED_ASSERT()` is like `ABSL_ASSERT()`, but used to implement
+// runtime assertions that should be enabled in hardened builds even when
+// `NDEBUG` is defined.
+//
+// When `NDEBUG` is not defined, `ABSL_HARDENED_ASSERT()` is identical to
+// `ABSL_ASSERT()`.
+//
+// See `ABSL_OPTION_HARDENED` in `absl/base/options.h` for more information on
+// hardened mode.
+#if ABSL_OPTION_HARDENED == 1 && defined(NDEBUG)
+#define ABSL_HARDENING_ASSERT(expr) \
+ (ABSL_PREDICT_TRUE((expr)) ? static_cast<void>(0) \
+ : [] { ABSL_INTERNAL_HARDENING_ABORT(); }())
+#else
+#define ABSL_HARDENING_ASSERT(expr) ABSL_ASSERT(expr)
+#endif
+
#ifdef ABSL_HAVE_EXCEPTIONS
#define ABSL_INTERNAL_TRY try
#define ABSL_INTERNAL_CATCH_ANY catch (...)
diff --git a/absl/base/options.h b/absl/base/options.h
index 234137c7..230bf1ee 100644
--- a/absl/base/options.h
+++ b/absl/base/options.h
@@ -1,6 +1,3 @@
-#ifndef ABSL_BASE_OPTIONS_H_
-#define ABSL_BASE_OPTIONS_H_
-
// Copyright 2019 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
@@ -67,6 +64,9 @@
// proper Abseil implementation at compile-time, which will not be sufficient
// to guarantee ABI stability to package managers.
+#ifndef ABSL_BASE_OPTIONS_H_
+#define ABSL_BASE_OPTIONS_H_
+
// Include a standard library header to allow configuration based on the
// standard library in use.
#ifdef __cplusplus
@@ -208,4 +208,31 @@
#define ABSL_OPTION_USE_INLINE_NAMESPACE 0
#define ABSL_OPTION_INLINE_NAMESPACE_NAME head
+// ABSL_OPTION_HARDENED
+//
+// This option enables a "hardened" build in release mode (in this context,
+// release mode is defined as a build where the `NDEBUG` macro is defined).
+//
+// A value of 0 means that "hardened" mode is not enabled.
+//
+// A value of 1 means that "hardened" mode is enabled.
+//
+// Hardened builds have additional security checks enabled when `NDEBUG` is
+// defined. Defining `NDEBUG` is normally used to turn `assert()` macro into a
+// no-op, as well as disabling other bespoke program consistency checks. By
+// defining ABSL_OPTION_HARDENED to 1, a select set of checks remain enabled in
+// release mode. These checks guard against programming errors that may lead to
+// security vulnerabilities. In release mode, when one of these programming
+// errors is encountered, the program will immediately abort, possibly without
+// any attempt at logging.
+//
+// The checks enabled by this option are not free; they do incur runtime cost.
+//
+// The checks enabled by this option are always active when `NDEBUG` is not
+// defined, even in the case when ABSL_OPTION_HARDENED is defined to 0. The
+// checks enabled by this option may abort the program in a different way and
+// log additional information when `NDEBUG` is not defined.
+
+#define ABSL_OPTION_HARDENED 0
+
#endif // ABSL_BASE_OPTIONS_H_
diff --git a/absl/container/BUILD.bazel b/absl/container/BUILD.bazel
index 70985641..c7f7b0d9 100644
--- a/absl/container/BUILD.bazel
+++ b/absl/container/BUILD.bazel
@@ -74,6 +74,7 @@ cc_test(
linkopts = ABSL_DEFAULT_LINKOPTS,
deps = [
":fixed_array",
+ "//absl/base:config",
"//absl/base:exception_testing",
"//absl/hash:hash_testing",
"//absl/memory",
@@ -153,6 +154,7 @@ cc_test(
":counting_allocator",
":inlined_vector",
":test_instance_tracker",
+ "//absl/base:config",
"//absl/base:core_headers",
"//absl/base:exception_testing",
"//absl/base:raw_logging_internal",
diff --git a/absl/container/CMakeLists.txt b/absl/container/CMakeLists.txt
index 99a8e9c0..a732fe82 100644
--- a/absl/container/CMakeLists.txt
+++ b/absl/container/CMakeLists.txt
@@ -147,6 +147,7 @@ absl_cc_test(
${ABSL_TEST_COPTS}
DEPS
absl::fixed_array
+ absl::config
absl::exception_testing
absl::hash_testing
absl::memory
@@ -221,6 +222,7 @@ absl_cc_test(
absl::counting_allocator
absl::inlined_vector
absl::test_instance_tracker
+ absl::config
absl::core_headers
absl::exception_testing
absl::hash_testing
diff --git a/absl/container/fixed_array.h b/absl/container/fixed_array.h
index a9ce99ba..796dd629 100644
--- a/absl/container/fixed_array.h
+++ b/absl/container/fixed_array.h
@@ -217,7 +217,7 @@ class FixedArray {
// Returns a reference the ith element of the fixed array.
// REQUIRES: 0 <= i < size()
reference operator[](size_type i) {
- assert(i < size());
+ ABSL_HARDENING_ASSERT(i < size());
return data()[i];
}
@@ -225,7 +225,7 @@ class FixedArray {
// ith element of the fixed array.
// REQUIRES: 0 <= i < size()
const_reference operator[](size_type i) const {
- assert(i < size());
+ ABSL_HARDENING_ASSERT(i < size());
return data()[i];
}
@@ -252,20 +252,32 @@ class FixedArray {
// FixedArray::front()
//
// Returns a reference to the first element of the fixed array.
- reference front() { return *begin(); }
+ reference front() {
+ ABSL_HARDENING_ASSERT(!empty());
+ return data()[0];
+ }
// Overload of FixedArray::front() to return a reference to the first element
// of a fixed array of const values.
- const_reference front() const { return *begin(); }
+ const_reference front() const {
+ ABSL_HARDENING_ASSERT(!empty());
+ return data()[0];
+ }
// FixedArray::back()
//
// Returns a reference to the last element of the fixed array.
- reference back() { return *(end() - 1); }
+ reference back() {
+ ABSL_HARDENING_ASSERT(!empty());
+ return data()[size() - 1];
+ }
// Overload of FixedArray::back() to return a reference to the last element
// of a fixed array of const values.
- const_reference back() const { return *(end() - 1); }
+ const_reference back() const {
+ ABSL_HARDENING_ASSERT(!empty());
+ return data()[size() - 1];
+ }
// FixedArray::begin()
//
diff --git a/absl/container/fixed_array_test.cc b/absl/container/fixed_array_test.cc
index c960fe51..9b1c224f 100644
--- a/absl/container/fixed_array_test.cc
+++ b/absl/container/fixed_array_test.cc
@@ -28,6 +28,7 @@
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "absl/base/internal/exception_testing.h"
+#include "absl/base/options.h"
#include "absl/hash/hash_testing.h"
#include "absl/memory/memory.h"
@@ -188,6 +189,21 @@ TEST(FixedArrayTest, AtThrows) {
"failed bounds check");
}
+TEST(FixedArrayTest, Hardened) {
+#if !defined(NDEBUG) || ABSL_OPTION_HARDENED
+ absl::FixedArray<int> a = {1, 2, 3};
+ EXPECT_EQ(a[2], 3);
+ EXPECT_DEATH_IF_SUPPORTED(a[3], "");
+ EXPECT_DEATH_IF_SUPPORTED(a[-1], "");
+
+ absl::FixedArray<int> empty(0);
+ EXPECT_DEATH_IF_SUPPORTED(empty[0], "");
+ EXPECT_DEATH_IF_SUPPORTED(empty[-1], "");
+ EXPECT_DEATH_IF_SUPPORTED(empty.front(), "");
+ EXPECT_DEATH_IF_SUPPORTED(empty.back(), "");
+#endif
+}
+
TEST(FixedArrayRelationalsTest, EqualArrays) {
for (int i = 0; i < 10; ++i) {
absl::FixedArray<int, 5> a1(i);
diff --git a/absl/container/inlined_vector.h b/absl/container/inlined_vector.h
index 2388d471..5f6f6154 100644
--- a/absl/container/inlined_vector.h
+++ b/absl/container/inlined_vector.h
@@ -48,6 +48,7 @@
#include "absl/algorithm/algorithm.h"
#include "absl/base/internal/throw_delegate.h"
+#include "absl/base/macros.h"
#include "absl/base/optimization.h"
#include "absl/base/port.h"
#include "absl/container/internal/inlined_vector.h"
@@ -307,16 +308,14 @@ class InlinedVector {
//
// Returns a `reference` to the `i`th element of the inlined vector.
reference operator[](size_type i) {
- assert(i < size());
-
+ ABSL_HARDENING_ASSERT(i < size());
return data()[i];
}
// Overload of `InlinedVector::operator[](...)` that returns a
// `const_reference` to the `i`th element of the inlined vector.
const_reference operator[](size_type i) const {
- assert(i < size());
-
+ ABSL_HARDENING_ASSERT(i < size());
return data()[i];
}
@@ -331,7 +330,6 @@ class InlinedVector {
base_internal::ThrowStdOutOfRange(
"`InlinedVector::at(size_type)` failed bounds check");
}
-
return data()[i];
}
@@ -345,7 +343,6 @@ class InlinedVector {
base_internal::ThrowStdOutOfRange(
"`InlinedVector::at(size_type) const` failed bounds check");
}
-
return data()[i];
}
@@ -353,16 +350,14 @@ class InlinedVector {
//
// Returns a `reference` to the first element of the inlined vector.
reference front() {
- assert(!empty());
-
+ ABSL_HARDENING_ASSERT(!empty());
return at(0);
}
// Overload of `InlinedVector::front()` that returns a `const_reference` to
// the first element of the inlined vector.
const_reference front() const {
- assert(!empty());
-
+ ABSL_HARDENING_ASSERT(!empty());
return at(0);
}
@@ -370,16 +365,14 @@ class InlinedVector {
//
// Returns a `reference` to the last element of the inlined vector.
reference back() {
- assert(!empty());
-
+ ABSL_HARDENING_ASSERT(!empty());
return at(size() - 1);
}
// Overload of `InlinedVector::back()` that returns a `const_reference` to the
// last element of the inlined vector.
const_reference back() const {
- assert(!empty());
-
+ ABSL_HARDENING_ASSERT(!empty());
return at(size() - 1);
}
@@ -573,8 +566,8 @@ class InlinedVector {
// of `v` starting at `pos`, returning an `iterator` pointing to the first of
// the newly inserted elements.
iterator insert(const_iterator pos, size_type n, const_reference v) {
- assert(pos >= begin());
- assert(pos <= end());
+ ABSL_HARDENING_ASSERT(pos >= begin());
+ ABSL_HARDENING_ASSERT(pos <= end());
if (ABSL_PREDICT_TRUE(n != 0)) {
value_type dealias = v;
@@ -600,8 +593,8 @@ class InlinedVector {
EnableIfAtLeastForwardIterator<ForwardIterator>* = nullptr>
iterator insert(const_iterator pos, ForwardIterator first,
ForwardIterator last) {
- assert(pos >= begin());
- assert(pos <= end());
+ ABSL_HARDENING_ASSERT(pos >= begin());
+ ABSL_HARDENING_ASSERT(pos <= end());
if (ABSL_PREDICT_TRUE(first != last)) {
return storage_.Insert(pos, IteratorValueAdapter<ForwardIterator>(first),
@@ -619,8 +612,8 @@ class InlinedVector {
template <typename InputIterator,
DisableIfAtLeastForwardIterator<InputIterator>* = nullptr>
iterator insert(const_iterator pos, InputIterator first, InputIterator last) {
- assert(pos >= begin());
- assert(pos <= end());
+ ABSL_HARDENING_ASSERT(pos >= begin());
+ ABSL_HARDENING_ASSERT(pos <= end());
size_type index = std::distance(cbegin(), pos);
for (size_type i = index; first != last; ++i, static_cast<void>(++first)) {
@@ -636,8 +629,8 @@ class InlinedVector {
// `pos`, returning an `iterator` pointing to the newly emplaced element.
template <typename... Args>
iterator emplace(const_iterator pos, Args&&... args) {
- assert(pos >= begin());
- assert(pos <= end());
+ ABSL_HARDENING_ASSERT(pos >= begin());
+ ABSL_HARDENING_ASSERT(pos <= end());
value_type dealias(std::forward<Args>(args)...);
return storage_.Insert(pos,
@@ -670,7 +663,7 @@ class InlinedVector {
//
// Destroys the element at `back()`, reducing the size by `1`.
void pop_back() noexcept {
- assert(!empty());
+ ABSL_HARDENING_ASSERT(!empty());
AllocatorTraits::destroy(*storage_.GetAllocPtr(), data() + (size() - 1));
storage_.SubtractSize(1);
@@ -683,8 +676,8 @@ class InlinedVector {
//
// NOTE: may return `end()`, which is not dereferencable.
iterator erase(const_iterator pos) {
- assert(pos >= begin());
- assert(pos < end());
+ ABSL_HARDENING_ASSERT(pos >= begin());
+ ABSL_HARDENING_ASSERT(pos < end());
return storage_.Erase(pos, pos + 1);
}
@@ -695,9 +688,9 @@ class InlinedVector {
//
// NOTE: may return `end()`, which is not dereferencable.
iterator erase(const_iterator from, const_iterator to) {
- assert(from >= begin());
- assert(from <= to);
- assert(to <= end());
+ ABSL_HARDENING_ASSERT(from >= begin());
+ ABSL_HARDENING_ASSERT(from <= to);
+ ABSL_HARDENING_ASSERT(to <= end());
if (ABSL_PREDICT_TRUE(from != to)) {
return storage_.Erase(from, to);
diff --git a/absl/container/inlined_vector_test.cc b/absl/container/inlined_vector_test.cc
index 5965eac7..415c60d9 100644
--- a/absl/container/inlined_vector_test.cc
+++ b/absl/container/inlined_vector_test.cc
@@ -30,6 +30,7 @@
#include "absl/base/internal/exception_testing.h"
#include "absl/base/internal/raw_logging.h"
#include "absl/base/macros.h"
+#include "absl/base/options.h"
#include "absl/container/internal/counting_allocator.h"
#include "absl/container/internal/test_instance_tracker.h"
#include "absl/hash/hash_testing.h"
@@ -247,6 +248,16 @@ TEST(IntVec, Erase) {
}
}
+TEST(IntVec, Hardened) {
+ IntVec v;
+ Fill(&v, 10);
+ EXPECT_EQ(v[9], 9);
+#if !defined(NDEBUG) || ABSL_OPTION_HARDENED
+ EXPECT_DEATH_IF_SUPPORTED(v[10], "");
+ EXPECT_DEATH_IF_SUPPORTED(v[-1], "");
+#endif
+}
+
// At the end of this test loop, the elements between [erase_begin, erase_end)
// should have reference counts == 0, and all others elements should have
// reference counts == 1.
diff --git a/absl/copts/configure_copts.bzl b/absl/copts/configure_copts.bzl
index 9dd6bd0a..ff9a5ea9 100644
--- a/absl/copts/configure_copts.bzl
+++ b/absl/copts/configure_copts.bzl
@@ -48,7 +48,7 @@ ABSL_RANDOM_RANDEN_COPTS = select({
":cpu_darwin": ABSL_RANDOM_HWAES_X64_FLAGS,
":cpu_x64_windows_msvc": ABSL_RANDOM_HWAES_MSVC_X64_FLAGS,
":cpu_x64_windows": ABSL_RANDOM_HWAES_MSVC_X64_FLAGS,
- ":cpu_haswell": ABSL_RANDOM_HWAES_X64_FLAGS,
+ ":cpu_k8": ABSL_RANDOM_HWAES_X64_FLAGS,
":cpu_ppc": ["-mcrypto"],
# Supported by default or unsupported.
@@ -65,7 +65,7 @@ def absl_random_randen_copts_init():
# These configs have consistent flags to enable HWAES intsructions.
cpu_configs = [
"ppc",
- "haswell",
+ "k8",
"darwin_x86_64",
"darwin",
"x64_windows_msvc",
diff --git a/absl/flags/internal/flag.cc b/absl/flags/internal/flag.cc
index a45e883e..56a5ed2b 100644
--- a/absl/flags/internal/flag.cc
+++ b/absl/flags/internal/flag.cc
@@ -74,6 +74,59 @@ class MutexRelock {
} // namespace
+///////////////////////////////////////////////////////////////////////////////
+// Persistent state of the flag data.
+
+class FlagImpl;
+
+class FlagState : public flags_internal::FlagStateInterface {
+ public:
+ template <typename V>
+ FlagState(FlagImpl* flag_impl, const V& v, bool modified,
+ bool on_command_line, int64_t counter)
+ : flag_impl_(flag_impl),
+ value_(v),
+ modified_(modified),
+ on_command_line_(on_command_line),
+ counter_(counter) {}
+
+ ~FlagState() override {
+ if (flag_impl_->ValueStorageKind() != FlagValueStorageKind::kHeapAllocated)
+ return;
+ flags_internal::Delete(flag_impl_->op_, value_.dynamic);
+ }
+
+ private:
+ friend class FlagImpl;
+
+ // Restores the flag to the saved state.
+ void Restore() const override {
+ if (!flag_impl_->RestoreState(*this)) return;
+
+ ABSL_INTERNAL_LOG(
+ INFO, absl::StrCat("Restore saved value of ", flag_impl_->Name(),
+ " to: ", flag_impl_->CurrentValue()));
+ }
+
+ // Flag and saved flag data.
+ FlagImpl* flag_impl_;
+ union SavedValue {
+ explicit SavedValue(void* v) : dynamic(v) {}
+ explicit SavedValue(int64_t v) : one_word(v) {}
+ explicit SavedValue(flags_internal::AlignedTwoWords v) : two_words(v) {}
+
+ void* dynamic;
+ int64_t one_word;
+ flags_internal::AlignedTwoWords two_words;
+ } value_;
+ bool modified_;
+ bool on_command_line_;
+ int64_t counter_;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// Flag implementation, which does not depend on flag value type.
+
void FlagImpl::Init() {
new (&data_guard_) absl::Mutex;
@@ -86,13 +139,13 @@ void FlagImpl::Init() {
break;
case FlagValueStorageKind::kOneWordAtomic: {
int64_t atomic_value;
- std::memcpy(&atomic_value, init_value.get(), Sizeof(op_));
+ std::memcpy(&atomic_value, init_value.get(), flags_internal::Sizeof(op_));
value_.one_word_atomic.store(atomic_value, std::memory_order_release);
break;
}
case FlagValueStorageKind::kTwoWordsAtomic: {
AlignedTwoWords atomic_value{0, 0};
- std::memcpy(&atomic_value, init_value.get(), Sizeof(op_));
+ std::memcpy(&atomic_value, init_value.get(), flags_internal::Sizeof(op_));
value_.two_words_atomic.store(atomic_value, std::memory_order_release);
break;
}
@@ -145,17 +198,17 @@ std::unique_ptr<void, DynValueDeleter> FlagImpl::MakeInitValue() const {
void FlagImpl::StoreValue(const void* src) {
switch (ValueStorageKind()) {
case FlagValueStorageKind::kHeapAllocated:
- Copy(op_, src, value_.dynamic);
+ flags_internal::Copy(op_, src, value_.dynamic);
break;
case FlagValueStorageKind::kOneWordAtomic: {
int64_t one_word_val;
- std::memcpy(&one_word_val, src, Sizeof(op_));
+ std::memcpy(&one_word_val, src, flags_internal::Sizeof(op_));
value_.one_word_atomic.store(one_word_val, std::memory_order_release);
break;
}
case FlagValueStorageKind::kTwoWordsAtomic: {
AlignedTwoWords two_words_val{0, 0};
- std::memcpy(&two_words_val, src, Sizeof(op_));
+ std::memcpy(&two_words_val, src, flags_internal::Sizeof(op_));
value_.two_words_atomic.store(two_words_val, std::memory_order_release);
break;
}
@@ -172,11 +225,17 @@ std::string FlagImpl::Filename() const {
return flags_internal::GetUsageConfig().normalize_filename(filename_);
}
+absl::string_view FlagImpl::Typename() const { return ""; }
+
std::string FlagImpl::Help() const {
return HelpSourceKind() == FlagHelpKind::kLiteral ? help_.literal
: help_.gen_func();
}
+FlagStaticTypeId FlagImpl::TypeId() const {
+ return flags_internal::StaticTypeId(op_);
+}
+
bool FlagImpl::IsModified() const {
absl::MutexLock l(DataGuard());
return modified_;
@@ -195,10 +254,10 @@ std::string FlagImpl::DefaultValue() const {
}
std::string FlagImpl::CurrentValue() const {
- DataGuard(); // Make sure flag initialized
+ auto* guard = DataGuard(); // Make sure flag initialized
switch (ValueStorageKind()) {
case FlagValueStorageKind::kHeapAllocated: {
- absl::MutexLock l(DataGuard());
+ absl::MutexLock l(guard);
return flags_internal::Unparse(op_, value_.dynamic);
}
case FlagValueStorageKind::kOneWordAtomic: {
@@ -250,23 +309,53 @@ void FlagImpl::InvokeCallback() const {
cb();
}
-bool FlagImpl::RestoreState(const void* value, bool modified,
- bool on_command_line, int64_t counter) {
- {
- absl::MutexLock l(DataGuard());
+std::unique_ptr<FlagStateInterface> FlagImpl::SaveState() {
+ absl::MutexLock l(DataGuard());
- if (counter_ == counter) return false;
+ bool modified = modified_;
+ bool on_command_line = on_command_line_;
+ switch (ValueStorageKind()) {
+ case FlagValueStorageKind::kHeapAllocated: {
+ return absl::make_unique<FlagState>(
+ this, flags_internal::Clone(op_, value_.dynamic), modified,
+ on_command_line, counter_);
+ }
+ case FlagValueStorageKind::kOneWordAtomic: {
+ return absl::make_unique<FlagState>(
+ this, value_.one_word_atomic.load(std::memory_order_acquire),
+ modified, on_command_line, counter_);
+ }
+ case FlagValueStorageKind::kTwoWordsAtomic: {
+ return absl::make_unique<FlagState>(
+ this, value_.two_words_atomic.load(std::memory_order_acquire),
+ modified, on_command_line, counter_);
+ }
}
+ return nullptr;
+}
- Write(value);
+bool FlagImpl::RestoreState(const FlagState& flag_state) {
+ absl::MutexLock l(DataGuard());
- {
- absl::MutexLock l(DataGuard());
+ if (flag_state.counter_ == counter_) {
+ return false;
+ }
- modified_ = modified;
- on_command_line_ = on_command_line;
+ switch (ValueStorageKind()) {
+ case FlagValueStorageKind::kHeapAllocated:
+ StoreValue(flag_state.value_.dynamic);
+ break;
+ case FlagValueStorageKind::kOneWordAtomic:
+ StoreValue(&flag_state.value_.one_word);
+ break;
+ case FlagValueStorageKind::kTwoWordsAtomic:
+ StoreValue(&flag_state.value_.two_words);
+ break;
}
+ modified_ = flag_state.modified_;
+ on_command_line_ = flag_state.on_command_line_;
+
return true;
}
@@ -290,10 +379,10 @@ std::unique_ptr<void, DynValueDeleter> FlagImpl::TryParse(
}
void FlagImpl::Read(void* dst) const {
- DataGuard(); // Make sure flag initialized
+ auto* guard = DataGuard(); // Make sure flag initialized
switch (ValueStorageKind()) {
case FlagValueStorageKind::kHeapAllocated: {
- absl::MutexLock l(DataGuard());
+ absl::MutexLock l(guard);
flags_internal::CopyConstruct(op_, value_.dynamic, dst);
break;
@@ -301,13 +390,13 @@ void FlagImpl::Read(void* dst) const {
case FlagValueStorageKind::kOneWordAtomic: {
const auto one_word_val =
value_.one_word_atomic.load(std::memory_order_acquire);
- std::memcpy(dst, &one_word_val, Sizeof(op_));
+ std::memcpy(dst, &one_word_val, flags_internal::Sizeof(op_));
break;
}
case FlagValueStorageKind::kTwoWordsAtomic: {
const auto two_words_val =
value_.two_words_atomic.load(std::memory_order_acquire);
- std::memcpy(dst, &two_words_val, Sizeof(op_));
+ std::memcpy(dst, &two_words_val, flags_internal::Sizeof(op_));
break;
}
}
diff --git a/absl/flags/internal/flag.h b/absl/flags/internal/flag.h
index 2c4aba68..f27e558b 100644
--- a/absl/flags/internal/flag.h
+++ b/absl/flags/internal/flag.h
@@ -40,9 +40,6 @@ namespace absl {
ABSL_NAMESPACE_BEGIN
namespace flags_internal {
-template <typename T>
-class Flag;
-
///////////////////////////////////////////////////////////////////////////////
// Flag value type operations, eg., parsing, copying, etc. are provided
// by function specific to that type with a signature matching FlagOpFn.
@@ -149,36 +146,6 @@ inline FlagStaticTypeId StaticTypeId(FlagOpFn op) {
}
///////////////////////////////////////////////////////////////////////////////
-// Persistent state of the flag data.
-
-template <typename T>
-class FlagState : public flags_internal::FlagStateInterface {
- public:
- FlagState(Flag<T>* flag, T&& cur, bool modified, bool on_command_line,
- int64_t counter)
- : flag_(flag),
- cur_value_(std::move(cur)),
- modified_(modified),
- on_command_line_(on_command_line),
- counter_(counter) {}
-
- ~FlagState() override = default;
-
- private:
- friend class Flag<T>;
-
- // Restores the flag to the saved state.
- void Restore() const override;
-
- // Flag and saved flag data.
- Flag<T>* flag_;
- T cur_value_;
- bool modified_;
- bool on_command_line_;
- int64_t counter_;
-};
-
-///////////////////////////////////////////////////////////////////////////////
// Flag help auxiliary structs.
// This is help argument for absl::Flag encapsulating the string literal pointer
@@ -341,13 +308,15 @@ struct FlagCallback {
struct DynValueDeleter {
explicit DynValueDeleter(FlagOpFn op_arg = nullptr) : op(op_arg) {}
void operator()(void* ptr) const {
- if (op != nullptr) Delete(op, ptr);
+ if (op != nullptr) flags_internal::Delete(op, ptr);
}
FlagOpFn op;
};
-class FlagImpl {
+class FlagState;
+
+class FlagImpl final : public flags_internal::CommandLineFlag {
public:
constexpr FlagImpl(const char* name, const char* filename, FlagOpFn op,
FlagHelpArg help, FlagValueStorageKind value_kind,
@@ -368,15 +337,7 @@ class FlagImpl {
data_guard_{} {}
// Constant access methods
- absl::string_view Name() const;
- std::string Filename() const;
- std::string Help() const;
- bool IsModified() const ABSL_LOCKS_EXCLUDED(*DataGuard());
- bool IsSpecifiedOnCommandLine() const ABSL_LOCKS_EXCLUDED(*DataGuard());
- std::string DefaultValue() const ABSL_LOCKS_EXCLUDED(*DataGuard());
- std::string CurrentValue() const ABSL_LOCKS_EXCLUDED(*DataGuard());
- void Read(void* dst) const ABSL_LOCKS_EXCLUDED(*DataGuard());
-
+ void Read(void* dst) const override ABSL_LOCKS_EXCLUDED(*DataGuard());
template <typename T, typename std::enable_if<FlagUseHeapStorage<T>::value,
int>::type = 0>
void Get(T* dst) const {
@@ -404,34 +365,12 @@ class FlagImpl {
// Mutating access methods
void Write(const void* src) ABSL_LOCKS_EXCLUDED(*DataGuard());
- bool ParseFrom(absl::string_view value, FlagSettingMode set_mode,
- ValueSource source, std::string* err)
- ABSL_LOCKS_EXCLUDED(*DataGuard());
// Interfaces to operate on callbacks.
void SetCallback(const FlagCallbackFunc mutation_callback)
ABSL_LOCKS_EXCLUDED(*DataGuard());
void InvokeCallback() const ABSL_EXCLUSIVE_LOCKS_REQUIRED(*DataGuard());
- // Interfaces to save/restore mutable flag data
- template <typename T>
- std::unique_ptr<FlagStateInterface> SaveState(Flag<T>* flag) const
- ABSL_LOCKS_EXCLUDED(*DataGuard()) {
- T&& cur_value = flag->Get();
- absl::MutexLock l(DataGuard());
-
- return absl::make_unique<FlagState<T>>(
- flag, std::move(cur_value), modified_, on_command_line_, counter_);
- }
- bool RestoreState(const void* value, bool modified, bool on_command_line,
- int64_t counter) ABSL_LOCKS_EXCLUDED(*DataGuard());
-
- // Value validation interfaces.
- void CheckDefaultValueParsingRoundtrip() const
- ABSL_LOCKS_EXCLUDED(*DataGuard());
- bool ValidateInputValue(absl::string_view value) const
- ABSL_LOCKS_EXCLUDED(*DataGuard());
-
// Used in read/write operations to validate source/target has correct type.
// For example if flag is declared as absl::Flag<int> FLAGS_foo, a call to
// absl::GetFlag(FLAGS_foo) validates that the type of FLAGS_foo is indeed
@@ -441,6 +380,10 @@ class FlagImpl {
void AssertValidType(FlagStaticTypeId type_id) const;
private:
+ template <typename T>
+ friend class Flag;
+ friend class FlagState;
+
// Ensures that `data_guard_` is initialized and returns it.
absl::Mutex* DataGuard() const ABSL_LOCK_RETURNED((absl::Mutex*)&data_guard_);
// Returns heap allocated value of type T initialized with default value.
@@ -467,6 +410,37 @@ class FlagImpl {
return static_cast<FlagDefaultKind>(def_kind_);
}
+ // CommandLineFlag interface implementation
+ absl::string_view Name() const override;
+ std::string Filename() const override;
+ absl::string_view Typename() const override;
+ std::string Help() const override;
+ FlagStaticTypeId TypeId() const override;
+ bool IsModified() const override ABSL_LOCKS_EXCLUDED(*DataGuard());
+ bool IsSpecifiedOnCommandLine() const override
+ ABSL_LOCKS_EXCLUDED(*DataGuard());
+ std::string DefaultValue() const override ABSL_LOCKS_EXCLUDED(*DataGuard());
+ std::string CurrentValue() const override ABSL_LOCKS_EXCLUDED(*DataGuard());
+ bool ValidateInputValue(absl::string_view value) const override
+ ABSL_LOCKS_EXCLUDED(*DataGuard());
+ void CheckDefaultValueParsingRoundtrip() const override
+ ABSL_LOCKS_EXCLUDED(*DataGuard());
+
+ // Interfaces to save and restore flags to/from persistent state.
+ // Returns current flag state or nullptr if flag does not support
+ // saving and restoring a state.
+ std::unique_ptr<FlagStateInterface> SaveState() override
+ ABSL_LOCKS_EXCLUDED(*DataGuard());
+
+ // Restores the flag state to the supplied state object. If there is
+ // nothing to restore returns false. Otherwise returns true.
+ bool RestoreState(const FlagState& flag_state)
+ ABSL_LOCKS_EXCLUDED(*DataGuard());
+
+ bool ParseFrom(absl::string_view value, FlagSettingMode set_mode,
+ ValueSource source, std::string* error) override
+ ABSL_LOCKS_EXCLUDED(*DataGuard());
+
// Immutable flag's state.
// Flags name passed to ABSL_FLAG as second arg.
@@ -536,7 +510,7 @@ class FlagImpl {
// flag reflection handle interface.
template <typename T>
-class Flag final : public flags_internal::CommandLineFlag {
+class Flag {
public:
constexpr Flag(const char* name, const char* filename, const FlagHelpArg help,
const FlagDfltGenFunc default_value_gen)
@@ -568,60 +542,24 @@ class Flag final : public flags_internal::CommandLineFlag {
}
// CommandLineFlag interface
- absl::string_view Name() const override { return impl_.Name(); }
- std::string Filename() const override { return impl_.Filename(); }
- absl::string_view Typename() const override { return ""; }
- std::string Help() const override { return impl_.Help(); }
- bool IsModified() const override { return impl_.IsModified(); }
- bool IsSpecifiedOnCommandLine() const override {
+ absl::string_view Name() const { return impl_.Name(); }
+ std::string Filename() const { return impl_.Filename(); }
+ absl::string_view Typename() const { return ""; }
+ std::string Help() const { return impl_.Help(); }
+ bool IsModified() const { return impl_.IsModified(); }
+ bool IsSpecifiedOnCommandLine() const {
return impl_.IsSpecifiedOnCommandLine();
}
- std::string DefaultValue() const override { return impl_.DefaultValue(); }
- std::string CurrentValue() const override { return impl_.CurrentValue(); }
- bool ValidateInputValue(absl::string_view value) const override {
- return impl_.ValidateInputValue(value);
- }
-
- // Interfaces to save and restore flags to/from persistent state.
- // Returns current flag state or nullptr if flag does not support
- // saving and restoring a state.
- std::unique_ptr<FlagStateInterface> SaveState() override {
- return impl_.SaveState(this);
- }
-
- // Restores the flag state to the supplied state object. If there is
- // nothing to restore returns false. Otherwise returns true.
- bool RestoreState(const FlagState<T>& flag_state) {
- return impl_.RestoreState(&flag_state.cur_value_, flag_state.modified_,
- flag_state.on_command_line_, flag_state.counter_);
- }
- bool ParseFrom(absl::string_view value, FlagSettingMode set_mode,
- ValueSource source, std::string* error) override {
- return impl_.ParseFrom(value, set_mode, source, error);
- }
- void CheckDefaultValueParsingRoundtrip() const override {
- impl_.CheckDefaultValueParsingRoundtrip();
- }
+ std::string DefaultValue() const { return impl_.DefaultValue(); }
+ std::string CurrentValue() const { return impl_.CurrentValue(); }
private:
- friend class FlagState<T>;
-
- void Read(void* dst) const override { impl_.Read(dst); }
- FlagStaticTypeId TypeId() const override { return &FlagStaticTypeIdGen<T>; }
-
+ template <typename U, bool do_register>
+ friend class FlagRegistrar;
// Flag's data
FlagImpl impl_;
};
-template <typename T>
-void FlagState<T>::Restore() const {
- if (flag_->RestoreState(*this)) {
- ABSL_INTERNAL_LOG(INFO,
- absl::StrCat("Restore saved value of ", flag_->Name(),
- " to: ", flag_->CurrentValue()));
- }
-}
-
// This class facilitates Flag object registration and tail expression-based
// flag definition, for example:
// ABSL_FLAG(int, foo, 42, "Foo help").OnUpdate(NotifyFooWatcher);
@@ -629,7 +567,7 @@ template <typename T, bool do_register>
class FlagRegistrar {
public:
explicit FlagRegistrar(Flag<T>* flag) : flag_(flag) {
- if (do_register) flags_internal::RegisterCommandLineFlag(flag_);
+ if (do_register) flags_internal::RegisterCommandLineFlag(&flag_->impl_);
}
FlagRegistrar& OnUpdate(FlagCallbackFunc cb) && {
diff --git a/absl/strings/string_view.h b/absl/strings/string_view.h
index b314bc34..8e348fcd 100644
--- a/absl/strings/string_view.h
+++ b/absl/strings/string_view.h
@@ -283,7 +283,7 @@ class string_view {
// Returns the ith element of the `string_view` using the array operator.
// Note that this operator does not perform any bounds checking.
constexpr const_reference operator[](size_type i) const {
- return ABSL_ASSERT(i < size()), ptr_[i];
+ return ABSL_HARDENING_ASSERT(i < size()), ptr_[i];
}
// string_view::at()
@@ -303,14 +303,14 @@ class string_view {
//
// Returns the first element of a `string_view`.
constexpr const_reference front() const {
- return ABSL_ASSERT(!empty()), ptr_[0];
+ return ABSL_HARDENING_ASSERT(!empty()), ptr_[0];
}
// string_view::back()
//
// Returns the last element of a `string_view`.
constexpr const_reference back() const {
- return ABSL_ASSERT(!empty()), ptr_[size() - 1];
+ return ABSL_HARDENING_ASSERT(!empty()), ptr_[size() - 1];
}
// string_view::data()
@@ -329,7 +329,7 @@ class string_view {
// Removes the first `n` characters from the `string_view`. Note that the
// underlying string is not changed, only the view.
void remove_prefix(size_type n) {
- assert(n <= length_);
+ ABSL_HARDENING_ASSERT(n <= length_);
ptr_ += n;
length_ -= n;
}
@@ -339,7 +339,7 @@ class string_view {
// Removes the last `n` characters from the `string_view`. Note that the
// underlying string is not changed, only the view.
void remove_suffix(size_type n) {
- assert(n <= length_);
+ ABSL_HARDENING_ASSERT(n <= length_);
length_ -= n;
}
@@ -520,7 +520,7 @@ class string_view {
(std::numeric_limits<difference_type>::max)();
static constexpr size_type CheckLengthInternal(size_type len) {
- return (void)ABSL_ASSERT(len <= kMaxSize), len;
+ return ABSL_HARDENING_ASSERT(len <= kMaxSize), len;
}
static constexpr size_type StrlenInternal(const char* str) {
diff --git a/absl/strings/string_view_test.cc b/absl/strings/string_view_test.cc
index 6ba06144..ff31b51e 100644
--- a/absl/strings/string_view_test.cc
+++ b/absl/strings/string_view_test.cc
@@ -28,6 +28,7 @@
#include "gtest/gtest.h"
#include "absl/base/config.h"
#include "absl/base/dynamic_annotations.h"
+#include "absl/base/options.h"
#if defined(ABSL_HAVE_STD_STRING_VIEW) || defined(__ANDROID__)
// We don't control the death messaging when using std::string_view.
@@ -820,7 +821,7 @@ TEST(StringViewTest, FrontBackSingleChar) {
TEST(StringViewTest, FrontBackEmpty) {
#ifndef ABSL_USES_STD_STRING_VIEW
-#ifndef NDEBUG
+#if !defined(NDEBUG) || ABSL_OPTION_HARDENED
// Abseil's string_view implementation has debug assertions that check that
// front() and back() are not called on an empty string_view.
absl::string_view sv;
@@ -1130,7 +1131,7 @@ TEST(StringViewTest, Noexcept) {
TEST(StringViewTest, BoundsCheck) {
#ifndef ABSL_USES_STD_STRING_VIEW
-#ifndef NDEBUG
+#if !defined(NDEBUG) || ABSL_OPTION_HARDENED
// Abseil's string_view implementation has bounds-checking in debug mode.
absl::string_view h = "hello";
ABSL_EXPECT_DEATH_IF_SUPPORTED(h[5], "");
diff --git a/absl/synchronization/mutex.cc b/absl/synchronization/mutex.cc
index 426558e6..6ee5f235 100644
--- a/absl/synchronization/mutex.cc
+++ b/absl/synchronization/mutex.cc
@@ -1751,7 +1751,8 @@ static const intptr_t ignore_waiting_writers[] = {
};
// Internal version of LockWhen(). See LockSlowWithDeadline()
-void Mutex::LockSlow(MuHow how, const Condition *cond, int flags) {
+ABSL_ATTRIBUTE_NOINLINE void Mutex::LockSlow(MuHow how, const Condition *cond,
+ int flags) {
ABSL_RAW_CHECK(
this->LockSlowWithDeadline(how, cond, KernelTimeout::Never(), flags),
"condition untrue on return from LockSlow");
@@ -2017,7 +2018,7 @@ void Mutex::LockSlowLoop(SynchWaitParams *waitp, int flags) {
// which holds the lock but is not runnable because its condition is false
// or it is in the process of blocking on a condition variable; it must requeue
// itself on the mutex/condvar to wait for its condition to become true.
-void Mutex::UnlockSlow(SynchWaitParams *waitp) {
+ABSL_ATTRIBUTE_NOINLINE void Mutex::UnlockSlow(SynchWaitParams *waitp) {
intptr_t v = mu_.load(std::memory_order_relaxed);
this->AssertReaderHeld();
CheckForMutexCorruption(v, "Unlock");
diff --git a/absl/types/optional.h b/absl/types/optional.h
index afda69a0..61540cfd 100644
--- a/absl/types/optional.h
+++ b/absl/types/optional.h
@@ -412,11 +412,11 @@ class optional : private optional_internal::optional_data<T>,
//
// If you need myOpt->foo in constexpr, use (*myOpt).foo instead.
const T* operator->() const {
- assert(this->engaged_);
+ ABSL_HARDENING_ASSERT(this->engaged_);
return std::addressof(this->data_);
}
T* operator->() {
- assert(this->engaged_);
+ ABSL_HARDENING_ASSERT(this->engaged_);
return std::addressof(this->data_);
}
@@ -425,17 +425,17 @@ class optional : private optional_internal::optional_data<T>,
// Accesses the underlying `T` value of an `optional`. If the `optional` is
// empty, behavior is undefined.
constexpr const T& operator*() const& {
- return ABSL_ASSERT(this->engaged_), reference();
+ return ABSL_HARDENING_ASSERT(this->engaged_), reference();
}
T& operator*() & {
- assert(this->engaged_);
+ ABSL_HARDENING_ASSERT(this->engaged_);
return reference();
}
constexpr const T&& operator*() const && {
- return absl::move(reference());
+ return ABSL_HARDENING_ASSERT(this->engaged_), absl::move(reference());
}
T&& operator*() && {
- assert(this->engaged_);
+ ABSL_HARDENING_ASSERT(this->engaged_);
return std::move(reference());
}
diff --git a/absl/types/optional_test.cc b/absl/types/optional_test.cc
index 47d5c8a2..874334e6 100644
--- a/absl/types/optional_test.cc
+++ b/absl/types/optional_test.cc
@@ -1057,8 +1057,7 @@ TEST(optionalTest, Value) {
// test constexpr value()
constexpr absl::optional<int> o1(1);
static_assert(1 == o1.value(), ""); // const &
-#if !defined(ABSL_SKIP_OVERLOAD_TEST_DUE_TO_MSVC_BUG) && \
- !defined(ABSL_SKIP_OVERLOAD_TEST_DUE_TO_GCC_BUG)
+#if !defined(_MSC_VER) && !defined(ABSL_SKIP_OVERLOAD_TEST_DUE_TO_GCC_BUG)
using COI = const absl::optional<int>;
static_assert(2 == COI(2).value(), ""); // const &&
#endif
@@ -1098,8 +1097,7 @@ TEST(optionalTest, DerefOperator) {
constexpr absl::optional<int> opt1(1);
static_assert(*opt1 == 1, "");
-#if !defined(ABSL_SKIP_OVERLOAD_TEST_DUE_TO_MSVC_BUG) && \
- !defined(ABSL_SKIP_OVERLOAD_TEST_DUE_TO_GCC_BUG)
+#if !defined(_MSC_VER) && !defined(ABSL_SKIP_OVERLOAD_TEST_DUE_TO_GCC_BUG)
using COI = const absl::optional<int>;
static_assert(*COI(2) == 2, "");
#endif
diff --git a/absl/types/span.h b/absl/types/span.h
index 21cda34b..734db695 100644
--- a/absl/types/span.h
+++ b/absl/types/span.h
@@ -276,7 +276,7 @@ class Span {
// Returns a reference to the i'th element of this span.
constexpr reference operator[](size_type i) const noexcept {
// MSVC 2015 accepts this as constexpr, but not ptr_[i]
- return ABSL_ASSERT(i < size()), *(data() + i);
+ return ABSL_HARDENING_ASSERT(i < size()), *(data() + i);
}
// Span::at()
@@ -295,7 +295,7 @@ class Span {
// Returns a reference to the first element of this span. The span must not
// be empty.
constexpr reference front() const noexcept {
- return ABSL_ASSERT(size() > 0), *data();
+ return ABSL_HARDENING_ASSERT(size() > 0), *data();
}
// Span::back()
@@ -303,7 +303,7 @@ class Span {
// Returns a reference to the last element of this span. The span must not
// be empty.
constexpr reference back() const noexcept {
- return ABSL_ASSERT(size() > 0), *(data() + size() - 1);
+ return ABSL_HARDENING_ASSERT(size() > 0), *(data() + size() - 1);
}
// Span::begin()
@@ -368,7 +368,7 @@ class Span {
//
// Removes the first `n` elements from the span.
void remove_prefix(size_type n) noexcept {
- assert(size() >= n);
+ ABSL_HARDENING_ASSERT(size() >= n);
ptr_ += n;
len_ -= n;
}
@@ -377,7 +377,7 @@ class Span {
//
// Removes the last `n` elements from the span.
void remove_suffix(size_type n) noexcept {
- assert(size() >= n);
+ ABSL_HARDENING_ASSERT(size() >= n);
len_ -= n;
}
@@ -665,7 +665,7 @@ constexpr Span<T> MakeSpan(T* ptr, size_t size) noexcept {
template <int&... ExplicitArgumentBarrier, typename T>
Span<T> MakeSpan(T* begin, T* end) noexcept {
- return ABSL_ASSERT(begin <= end), Span<T>(begin, end - begin);
+ return ABSL_HARDENING_ASSERT(begin <= end), Span<T>(begin, end - begin);
}
template <int&... ExplicitArgumentBarrier, typename C>
@@ -710,7 +710,7 @@ constexpr Span<const T> MakeConstSpan(T* ptr, size_t size) noexcept {
template <int&... ExplicitArgumentBarrier, typename T>
Span<const T> MakeConstSpan(T* begin, T* end) noexcept {
- return ABSL_ASSERT(begin <= end), Span<const T>(begin, end - begin);
+ return ABSL_HARDENING_ASSERT(begin <= end), Span<const T>(begin, end - begin);
}
template <int&... ExplicitArgumentBarrier, typename C>
diff --git a/absl/types/span_test.cc b/absl/types/span_test.cc
index 6ac234d3..2584339b 100644
--- a/absl/types/span_test.cc
+++ b/absl/types/span_test.cc
@@ -27,6 +27,7 @@
#include "absl/base/attributes.h"
#include "absl/base/config.h"
#include "absl/base/internal/exception_testing.h"
+#include "absl/base/options.h"
#include "absl/container/fixed_array.h"
#include "absl/container/inlined_vector.h"
#include "absl/hash/hash_testing.h"
@@ -233,7 +234,7 @@ TEST(IntSpan, ElementAccess) {
EXPECT_EQ(s.front(), s[0]);
EXPECT_EQ(s.back(), s[9]);
-#ifndef NDEBUG
+#if !defined(NDEBUG) || ABSL_OPTION_HARDENED
EXPECT_DEATH_IF_SUPPORTED(s[-1], "");
EXPECT_DEATH_IF_SUPPORTED(s[10], "");
#endif
@@ -273,6 +274,13 @@ TEST(IntSpan, RemovePrefixAndSuffix) {
EXPECT_EQ(s.size(), 0);
EXPECT_EQ(v, MakeRamp(20, 1));
+
+#if !defined(NDEBUG) || ABSL_OPTION_HARDENED
+ absl::Span<int> prefix_death(v);
+ EXPECT_DEATH_IF_SUPPORTED(prefix_death.remove_prefix(21), "");
+ absl::Span<int> suffix_death(v);
+ EXPECT_DEATH_IF_SUPPORTED(suffix_death.remove_suffix(21), "");
+#endif
}
TEST(IntSpan, Subspan) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-19 11:55:40 +0000