Export of internal Abseil changes

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0b924fe4e9871200792617329d32beb8356daa9b by Derek Mauro <dmauro@google.com>:

Use less threads in the GetTID() test to avoid test timeouts

PiperOrigin-RevId: 292566826

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0b519c4fd48d61b7c4ea94ed6a6be6e981b9c51a by Abseil Team <absl-team@google.com>:

Internal change.

PiperOrigin-RevId: 292563778

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3204f6e07bcc2b5e9098d45f1a20998f25ab808e by Abseil Team <absl-team@google.com>:

Internal change.

PiperOrigin-RevId: 292550551

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09fbbe73833478d3f26f3e33c8291b991fd3be51 by Derek Mauro <dmauro@google.com>:

Add a debug bounds-check to absl::string_view::operator[]

string_view accesses that are out-of-bounds are undefined behavior:
https://en.cppreference.com/w/cpp/string/basic_string_view/operator_at

This change causes code to abort in debug mode, indicating a bug and
possibly a security issue like a buffer overflow. Code broken by this
change should be investigated.

PiperOrigin-RevId: 292544735

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bf2c19cb45682628f963d4067c0cd6deed7e656d by Derek Mauro <dmauro@google.com>:

Add debug assertions to absl::string_view::front and absl::string_view::back

Calling front() or back() on an empty string_view is undefined behavior. This
assertion is to help catch broken code.
https://en.cppreference.com/w/cpp/string/basic_string_view/front
https://en.cppreference.com/w/cpp/string/basic_string_view/back

PiperOrigin-RevId: 292453255

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47f573679b322f8c0fd2cb037cc87e7bc822ac6b by Xiaoyi Zhang <zhangxy@google.com>:

Release functional/CMakeList.txt.

PiperOrigin-RevId: 292417025
GitOrigin-RevId: 0b924fe4e9871200792617329d32beb8356daa9b
Change-Id: Ie6980fb1ac351d72a2ce4468f25bd31db396f88a

1 files changed, 2 insertions, 2 deletions

diff --git a/absl/base/internal/sysinfo_test.cc b/absl/base/internal/sysinfo_test.cc
index cdec9b6..fa8b88b 100644
--- a/absl/base/internal/sysinfo_test.cc
+++ b/absl/base/internal/sysinfo_test.cc
@@ -59,8 +59,8 @@ TEST(SysinfoTest, GetTID) {
 #endif
   // Test that TIDs are unique to each thread.
   // Uses a few loops to exercise implementations that reallocate IDs.
-  for (int i = 0; i < 32; ++i) {
-    constexpr int kNumThreads = 64;
+  for (int i = 0; i < 10; ++i) {
+    constexpr int kNumThreads = 10;
     Barrier all_threads_done(kNumThreads);
     std::vector<std::thread> threads;