PiperOrigin-RevId: 507790741
Change-Id: I347357f9a2d698510f29b7d1b065ef73f9289292

Fix a discrepancy between absl::Hash and absl::HashOf for some negative signed integral types and improve the performance of absl::Hash.

PiperOrigin-RevId: 507598042
Change-Id: I96a7bd6b9c360f435f216b2671ae84d9768a46e8

`PrefetchToLocalCacheForWrite` should use `__builtin_prefetch(<addr>, 1, 3)` not `__builtin_prefetch<addr>, 1, 0)`

PiperOrigin-RevId: 507015724
Change-Id: I99f44fe819c27e6dcc0bb7b36f1a37015c6f1987

PiperOrigin-RevId: 506944023
Change-Id: I04ff13dcec89c57ba03707f5698c4198434216b6

PiperOrigin-RevId: 506622658
Change-Id: I17ae2d97a6cadb7bdd8ebd0ec0dd3976568cb7e1

Get rid of tail padding within `absl::Duration`. This reduces memory usage needs when storing duration in containers (e.g. `vector<absl::Duration>` uses 25% less memory), and allows classes with `absl::Duration` fields to fit other stuff in memory previously used by tail padding (e.g. `std::optional<absl::Duration>` is now 16 bytes instead of 24).

PiperOrigin-RevId: 506568782
Change-Id: Ic9e077f02a80da013fb2d312aff77761b970c07a

Get rid of tail padding within `absl::Duration`. This reduces memory usage needs when storing duration in containers (e.g. `vector<absl::Duration>` uses 25% less memory), and allows classes with `absl::Duration` fields to fit other stuff in memory previously used by tail padding (e.g. `std::optional<absl::Duration>` is now 16 bytes instead of 24).

PiperOrigin-RevId: 506543503
Change-Id: Ifeb2397c953a5d3da317a70ab49a3ebb85042344

PiperOrigin-RevId: 506323250
Change-Id: I0f7d4532c19088b011740ceff87ecec55cc34edb

Rollforward: in sanitizer mode, detect when references become invalidated by randomly rehashing on insertions when there is no reserved growth.

Rollforward of ed59f62f

PiperOrigin-RevId: 506314970
Change-Id: I7a654aef36bb169da9ea5c618789ee771f05fe28

PiperOrigin-RevId: 506151912
Change-Id: I388884b0bd80ef0f8a0b3d3c7d0e1b404ddfb742

Rollback in sanitizer mode, detect when references become invalidated by randomly rehashing on insertions when there is no reserved growth.

Rollback of ed59f62f

PiperOrigin-RevId: 506003574
Change-Id: I1766321f279a3226e2821e0390387d5639d28964

In sanitizer mode, detect when references become invalidated by randomly rehashing on insertions when there is no reserved growth.

PiperOrigin-RevId: 505807487
Change-Id: I9051a04f6a75e579d16e9ae8defd404bcc377fba

On some glibcs, this is defined as a call to sysconf(), which returns a long.

PiperOrigin-RevId: 505380003
Change-Id: I53207846d733d3a529630a6aff9bca425cf90a21

PiperOrigin-RevId: 505184961
Change-Id: I64482558a76abda6896bec4b2d323833b6cd7edf

`absl::Hex` and `absl::Dec` are now stringifiable through `AbslStringify`. This means that they can be passed to logging, `absl::StrFormat`, `absl::StrCat` and `absl::Substitute`. Note that this change will break unsupported usages of `absl::AlphaNum`. `absl::AlphaNum` is not intended to be instantiated as a stack variable due to lifetime issues. Unsupported usages include:

* constructing an `absl::AlphaNum` as a local variable.
  * For example, `absl::AlphaNum a = absl::Hex(...);`
* declaring an `absl::AlphaNum` as a member variable

Usage of `absl::AlphaNum` as a function parameter will continue to be supported.

PiperOrigin-RevId: 505158534
Change-Id: Idecdf0b3d137482e86b393c7480229343d68eb36

PiperOrigin-RevId: 504981951
Change-Id: I7357e8e6730ceda458b40aa605cd450e80271dc6

PiperOrigin-RevId: 504941246
Change-Id: I94c1e85afd254e84948477b511d41eeb8285fdae

PiperOrigin-RevId: 504866618
Change-Id: I9519299946c693ae1bedd769a25a9cb5137f2f54

Fixes #1360

PiperOrigin-RevId: 504850733
Change-Id: Ifa1e83d0c703ed69c969a12076db474caec9d496

PiperOrigin-RevId: 504728034
Change-Id: Ifb338247b7484426e25a58580783a1d70d27e6fd

The DLL export issue isn't a problem currently, since we don't explicitly export any symbols from the test dll.  This will be an issue in the future though.  Additionally, there was a typo in absl_internal_test_dll_contains that caused abseil_test_dll to be empty (and therefore not create a lib file).

PiperOrigin-RevId: 504555797
Change-Id: Ic7b50bcbe704f7c8fd44028071abcf5d6babb2cf

PiperOrigin-RevId: 504555535
Change-Id: Id40484e9f52c87e9d67def2735ee60481ca50526

This broke builds of abseil_test_dll, since CMake can't find the file we incorrectly specified.

PiperOrigin-RevId: 504372451
Change-Id: I6cd5a44f12bb2f473fae2ac920e047e782ae9524

It's uninitialized on purpose; we'll write into it through the span.

PiperOrigin-RevId: 504318917
Change-Id: I79835f0190253b8b470b3ca404f3979715f2a718

This was tested with https://github.com/protocolbuffers/protobuf/pull/11623 in Protobuf's windows shared library build.

PiperOrigin-RevId: 504294227
Change-Id: I9657197e649a334585bffa2c7bc6340cd2354e84

PiperOrigin-RevId: 504045295
Change-Id: I110d4573087358e17a719def29e8037adfac6d15

Const references enforce stronger constraints and are consistent with the standard library signature. There should be no performance loss.

PiperOrigin-RevId: 504043141
Change-Id: I6c4b017665a462fc04e16f425d330fce2c3da227

Ensure that we know both real low and high stack bounds
when relying on the stack bounds check.

PiperOrigin-RevId: 504003431
Change-Id: I8f6e6b75f5edff233d3cf80285f81b53f9080a0f

In the non-dll case, don't set the LNK_LIB variable in the deps loop.

PiperOrigin-RevId: 503854597
Change-Id: Ic57711c1ed95b998e6ca4f27a0a7982ee99595e2

use std::allocator_traits and std::pointer traits.

Note that the reason given in the comments for these implementations was
incorrect. Both of these exist in C++11, but not all compilers had
working implementations, so Abseil backfiled them. All supported compilers
now have working implementations.

https://en.cppreference.com/w/cpp/memory/allocator_traits
https://en.cppreference.com/w/cpp/memory/pointer_traits

Documentation has been updated to recommend the std:: spellings.

Fixes #1366

PiperOrigin-RevId: 503532746
Change-Id: Ia437f65a4c752581195dc582a41831b479d096c6

Add CodegenAbslRawHashSetStringFindNeEnd function, which is useful because the find isn't inlined but the iterator comparison is.

PiperOrigin-RevId: 503473637
Change-Id: I02b8d95b7a1b738314c4f07a863c7606f822f079

PiperOrigin-RevId: 503437019
Change-Id: I3630fec690f1472130fef21b16dfcd3c5208aa69

END_PUBLIC

absl: relax frame size check in x86 stack unwinding

Currently the unwinder stops whenever it sees a frame >100000 bytes.
There may be such legitimate frames, the default stack size is O(megabytes).
Only do this check if we are not within the thread stack bounds.
The thread stack is assumed to be readable, so the worst thing that can happen
if the large stack frame is actually bogus is that we will add one/few wrong frames and stop.

PiperOrigin-RevId: 503374764
Change-Id: Icabb55d6468b12a42bf026c37c98dbe84977e659

the earliest supported GCC version according to
https://github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md

PiperOrigin-RevId: 503337021
Change-Id: Ibc7b2453b7aa30779b76e2a4ad918e39d0efcabe

we intentionally test this behavior

PiperOrigin-RevId: 503234578
Change-Id: Ic42c2e55e03843af7a36f99debb5ebcf7baec0fe

PiperOrigin-RevId: 503229681
Change-Id: I72817b43c547bd142144d0887866c4e26ec09fb2

Doc fix: state that Base64Escape does in fact produce padding.  While at it, harmonize Base64Unescape and WebSafeBase64Unescape's documentation of padding.

PiperOrigin-RevId: 503178146
Change-Id: Id216044a9f6520653e2fa3a4505ff05eddf55659

Fixes #1365

PiperOrigin-RevId: 503160321
Change-Id: I210f194373c3e08a75d68298a8482be5f1f2227c