Update contrib/restricted/abseil-cpp to 20250127.0

commit_hash:cb84f6cd1a663877e7f59ac994d08e04a1e76205

10 files changed, 121 insertions, 28 deletions

diff --git a/contrib/restricted/abseil-cpp/absl/debugging/failure_signal_handler.cc b/contrib/restricted/abseil-cpp/absl/debugging/failure_signal_handler.cc
index 570d1e504d8..d31f5a1f4e2 100644
--- a/contrib/restricted/abseil-cpp/absl/debugging/failure_signal_handler.cc
+++ b/contrib/restricted/abseil-cpp/absl/debugging/failure_signal_handler.cc
@@ -21,6 +21,7 @@
 #ifdef _WIN32
 #include <windows.h>
 #else
+#include <pthread.h>
 #include <sched.h>
 #include <unistd.h>
 #endif
@@ -65,6 +66,23 @@
 #endif
 #endif
 
+// ABSL_HAVE_PTHREAD_CPU_NUMBER_NP
+//
+// Checks whether pthread_cpu_number_np is available.
+#ifdef ABSL_HAVE_PTHREAD_CPU_NUMBER_NP
+#error ABSL_HAVE_PTHREAD_CPU_NUMBER_NP cannot be directly set
+#elif defined(__APPLE__) && defined(__has_include) &&              \
+    ((defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) &&    \
+      __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 110000) ||  \
+     (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) &&   \
+      __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ >= 140200) || \
+     (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) &&    \
+      __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ >= 70100) ||   \
+     (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) &&       \
+      __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ >= 140200))
+#define ABSL_HAVE_PTHREAD_CPU_NUMBER_NP 1
+#endif
+
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 
@@ -330,6 +348,20 @@ static void ImmediateAbortSignalHandler(int) { RaiseToDefaultHandler(SIGABRT); }
 using GetTidType = decltype(absl::base_internal::GetTID());
 ABSL_CONST_INIT static std::atomic<GetTidType> failed_tid(0);
 
+static int GetCpuNumber() {
+#ifdef ABSL_HAVE_SCHED_GETCPU
+  return sched_getcpu();
+#elif defined(ABSL_HAVE_PTHREAD_CPU_NUMBER_NP)
+  size_t cpu_num;
+  if (pthread_cpu_number_np(&cpu_num) == 0) {
+    return static_cast<int>(cpu_num);
+  }
+  return -1;
+#else
+  return -1;
+#endif
+}
+
 #ifndef ABSL_HAVE_SIGACTION
 static void AbslFailureSignalHandler(int signo) {
   void* ucontext = nullptr;
@@ -360,10 +392,7 @@ static void AbslFailureSignalHandler(int signo, siginfo_t*, void* ucontext) {
   // Increase the chance that the CPU we report was the same CPU on which the
   // signal was received by doing this as early as possible, i.e. after
   // verifying that this is not a recursive signal handler invocation.
-  int my_cpu = -1;
-#ifdef ABSL_HAVE_SCHED_GETCPU
-  my_cpu = sched_getcpu();
-#endif
+  int my_cpu = GetCpuNumber();
 
 #ifdef ABSL_HAVE_ALARM
   // Set an alarm to abort the program in case this code hangs or deadlocks.
diff --git a/contrib/restricted/abseil-cpp/absl/debugging/internal/elf_mem_image.h b/contrib/restricted/abseil-cpp/absl/debugging/internal/elf_mem_image.h
index 19c4952e2f7..1fac29c52b0 100644
--- a/contrib/restricted/abseil-cpp/absl/debugging/internal/elf_mem_image.h
+++ b/contrib/restricted/abseil-cpp/absl/debugging/internal/elf_mem_image.h
@@ -35,7 +35,7 @@
 #if defined(__ELF__) && !defined(__OpenBSD__) && !defined(__QNX__) && \
     !defined(__native_client__) && !defined(__asmjs__) &&             \
     !defined(__wasm__) && !defined(__HAIKU__) && !defined(__sun) &&   \
-    !defined(__VXWORKS__) && !defined(__hexagon__)
+    !defined(__VXWORKS__) && !defined(__hexagon__) && !defined(__XTENSA__)
 #define ABSL_HAVE_ELF_MEM_IMAGE 1
 #endif
 
diff --git a/contrib/restricted/abseil-cpp/absl/debugging/internal/stack_consumption.h b/contrib/restricted/abseil-cpp/absl/debugging/internal/stack_consumption.h
index f41b64c39df..f5ba5575d1b 100644
--- a/contrib/restricted/abseil-cpp/absl/debugging/internal/stack_consumption.h
+++ b/contrib/restricted/abseil-cpp/absl/debugging/internal/stack_consumption.h
@@ -24,7 +24,7 @@
 // Use this feature test macro to detect its availability.
 #ifdef ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION
 #error ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION cannot be set directly
-#elif !defined(__APPLE__) && !defined(_WIN32) &&                     \
+#elif !defined(__APPLE__) && !defined(_WIN32) && !defined(__Fuchsia__) && \
     (defined(__i386__) || defined(__x86_64__) || defined(__ppc__) || \
      defined(__aarch64__) || defined(__riscv))
 #define ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION 1
diff --git a/contrib/restricted/abseil-cpp/absl/debugging/internal/stacktrace_aarch64-inl.inc b/contrib/restricted/abseil-cpp/absl/debugging/internal/stacktrace_aarch64-inl.inc
index b123479b1ae..4490c4e13ca 100644
--- a/contrib/restricted/abseil-cpp/absl/debugging/internal/stacktrace_aarch64-inl.inc
+++ b/contrib/restricted/abseil-cpp/absl/debugging/internal/stacktrace_aarch64-inl.inc
@@ -178,6 +178,20 @@ static void **NextStackFrame(void **old_frame_pointer, const void *uc,
   return new_frame_pointer;
 }
 
+// When PAC-RET (-mbranch-protection=pac-ret) is enabled, return addresses
+// stored on the stack will be signed, which means that pointer bits outside of
+// the VA range are potentially set. Since the stacktrace code is expected to
+// return normal code pointers, this function clears those bits.
+inline void* ClearPacBits(void* ptr) {
+  register void* x30 __asm__("x30") = ptr;
+  // The normal instruction for clearing PAC bits is XPACI, but for
+  // compatibility with ARM platforms that do not support pointer
+  // authentication, we use the hint space instruction XPACLRI instead. Hint
+  // space instructions behave as NOPs on unsupported platforms.
+  asm("xpaclri" : "+r"(x30));
+  return x30;
+}
+
 template <bool IS_STACK_FRAMES, bool IS_WITH_CONTEXT>
 // We count on the bottom frame being this one. See the comment
 // at prev_return_address
@@ -219,7 +233,7 @@ static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
     if (skip_count > 0) {
       skip_count--;
     } else {
-      result[n] = prev_return_address;
+      result[n] = ClearPacBits(prev_return_address);
       if (IS_STACK_FRAMES) {
         sizes[n] = static_cast<int>(
             ComputeStackFrameSize(prev_frame_pointer, frame_pointer));
diff --git a/contrib/restricted/abseil-cpp/absl/debugging/internal/stacktrace_config.h b/contrib/restricted/abseil-cpp/absl/debugging/internal/stacktrace_config.h
index 3929b1b7349..88949fe9740 100644
--- a/contrib/restricted/abseil-cpp/absl/debugging/internal/stacktrace_config.h
+++ b/contrib/restricted/abseil-cpp/absl/debugging/internal/stacktrace_config.h
@@ -42,6 +42,13 @@
 #define ABSL_STACKTRACE_INL_HEADER \
   "absl/debugging/internal/stacktrace_emscripten-inl.inc"
 
+#elif defined(__ANDROID__) && __ANDROID_API__ >= 33
+
+// Use the generic implementation for Android 33+ (Android T+). This is the
+// first version of Android for which <execinfo.h> implements backtrace().
+#define ABSL_STACKTRACE_INL_HEADER \
+  "absl/debugging/internal/stacktrace_generic-inl.inc"
+
 #elif defined(__linux__) && !defined(__ANDROID__)
 
 #if defined(NO_FRAME_POINTER) && \
diff --git a/contrib/restricted/abseil-cpp/absl/debugging/internal/stacktrace_riscv-inl.inc b/contrib/restricted/abseil-cpp/absl/debugging/internal/stacktrace_riscv-inl.inc
index 20183fa3213..3f9e12407ab 100644
--- a/contrib/restricted/abseil-cpp/absl/debugging/internal/stacktrace_riscv-inl.inc
+++ b/contrib/restricted/abseil-cpp/absl/debugging/internal/stacktrace_riscv-inl.inc
@@ -36,15 +36,16 @@
 #include "absl/base/attributes.h"
 #include "absl/debugging/stacktrace.h"
 
-static const uintptr_t kUnknownFrameSize = 0;
+static constexpr ptrdiff_t kUnknownFrameSize = 0;
 
 // Compute the size of a stack frame in [low..high).  We assume that low < high.
 // Return size of kUnknownFrameSize.
 template <typename T>
-static inline uintptr_t ComputeStackFrameSize(const T *low, const T *high) {
+static inline ptrdiff_t ComputeStackFrameSize(const T *low, const T *high) {
   const char *low_char_ptr = reinterpret_cast<const char *>(low);
   const char *high_char_ptr = reinterpret_cast<const char *>(high);
-  return low < high ? high_char_ptr - low_char_ptr : kUnknownFrameSize;
+  return low < high ? static_cast<ptrdiff_t>(high_char_ptr - low_char_ptr)
+                    : kUnknownFrameSize;
 }
 
 // Given a pointer to a stack frame, locate and return the calling stackframe,
@@ -93,8 +94,8 @@ static void ** NextStackFrame(void **old_frame_pointer, const void *uc,
 
   // Check frame size.  In strict mode, we assume frames to be under 100,000
   // bytes.  In non-strict mode, we relax the limit to 1MB.
-  const uintptr_t max_size = STRICT_UNWINDING ? 100000 : 1000000;
-  const uintptr_t frame_size =
+  const ptrdiff_t max_size = STRICT_UNWINDING ? 100000 : 1000000;
+  const ptrdiff_t frame_size =
       ComputeStackFrameSize(old_frame_pointer, new_frame_pointer);
   if (frame_size == kUnknownFrameSize) {
     if (STRICT_UNWINDING)
@@ -151,7 +152,9 @@ static int UnwindImpl(void **result, int *sizes, int max_depth, int skip_count,
     } else {
       result[n] = return_address;
       if (IS_STACK_FRAMES) {
-        sizes[n] = ComputeStackFrameSize(frame_pointer, next_frame_pointer);
+        // NextStackFrame() has already checked that frame size fits to int
+        sizes[n] = static_cast<int>(ComputeStackFrameSize(frame_pointer,
+                                                          next_frame_pointer));
       }
       n++;
     }
diff --git a/contrib/restricted/abseil-cpp/absl/debugging/leak_check.cc b/contrib/restricted/abseil-cpp/absl/debugging/leak_check.cc
index fdb8798b814..1370bcc4559 100644
--- a/contrib/restricted/abseil-cpp/absl/debugging/leak_check.cc
+++ b/contrib/restricted/abseil-cpp/absl/debugging/leak_check.cc
@@ -28,7 +28,7 @@
 #include <sanitizer/lsan_interface.h>
 
 #if ABSL_HAVE_ATTRIBUTE_WEAK
-extern "C" ABSL_ATTRIBUTE_WEAK int __lsan_is_turned_off();
+extern "C" ABSL_ATTRIBUTE_WEAK int __lsan_is_turned_off() { return 0; }
 #endif
 
 namespace absl {
@@ -37,13 +37,13 @@ bool HaveLeakSanitizer() { return true; }
 
 #if ABSL_HAVE_ATTRIBUTE_WEAK
 bool LeakCheckerIsActive() {
-  return !(&__lsan_is_turned_off && __lsan_is_turned_off());
+  return __lsan_is_turned_off() == 0;
 }
 #else
 bool LeakCheckerIsActive() { return true; }
 #endif
 
-bool FindAndReportLeaks() { return __lsan_do_recoverable_leak_check(); }
+bool FindAndReportLeaks() { return __lsan_do_recoverable_leak_check() != 0; }
 void DoIgnoreLeak(const void* ptr) { __lsan_ignore_object(ptr); }
 void RegisterLivePointers(const void* ptr, size_t size) {
   __lsan_register_root_region(ptr, size);
diff --git a/contrib/restricted/abseil-cpp/absl/debugging/symbolize.cc b/contrib/restricted/abseil-cpp/absl/debugging/symbolize.cc
index 638d3954aec..344436f9d10 100644
--- a/contrib/restricted/abseil-cpp/absl/debugging/symbolize.cc
+++ b/contrib/restricted/abseil-cpp/absl/debugging/symbolize.cc
@@ -12,12 +12,13 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// SKIP_ABSL_INLINE_NAMESPACE_CHECK
+
 #include "absl/debugging/symbolize.h"
 
 #ifdef _WIN32
 #include <winapifamily.h>
-#if !(WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)) || \
-    WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
+#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
 // UWP doesn't have access to win32 APIs.
 #define ABSL_INTERNAL_HAVE_SYMBOLIZE_WIN32
 #endif
diff --git a/contrib/restricted/abseil-cpp/absl/debugging/symbolize_elf.inc b/contrib/restricted/abseil-cpp/absl/debugging/symbolize_elf.inc
index ae75cd4153d..a98ca81d175 100644
--- a/contrib/restricted/abseil-cpp/absl/debugging/symbolize_elf.inc
+++ b/contrib/restricted/abseil-cpp/absl/debugging/symbolize_elf.inc
@@ -52,6 +52,7 @@
 #include <elf.h>
 #include <fcntl.h>
 #include <link.h>  // For ElfW() macro.
+#include <sys/resource.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
@@ -376,6 +377,46 @@ class Symbolizer {
   SymbolCacheLine symbol_cache_[SYMBOL_CACHE_LINES];
 };
 
+// Protect against client code closing low-valued file descriptors it doesn't
+// actually own.
+int OpenReadOnlyWithHighFD(const char *fname) {
+  static int high_fd = [] {
+    struct rlimit rlim{};
+    const int rc = getrlimit(RLIMIT_NOFILE, &rlim);
+    if (rc == 0 && rlim.rlim_cur >= 2000) {
+      const int max_fd = static_cast<int>(rlim.rlim_cur);
+
+      // This will return 2000 on reasonably-configured systems.
+      return std::min<int>(2000, max_fd - 1000);
+    }
+    ABSL_RAW_LOG(WARNING, "Unable to get high fd: rc=%d, limit=%ld",  //
+                 rc, static_cast<long>(rlim.rlim_cur));
+    return -1;
+  }();
+  constexpr int kOpenFlags = O_RDONLY | O_CLOEXEC;
+  if (high_fd >= 1000) {
+    const int fd = open(fname, kOpenFlags);
+    if (fd != -1 && fd < high_fd) {
+      // Try to relocate fd to high range.
+      static_assert(kOpenFlags & O_CLOEXEC,
+                    "F_DUPFD_CLOEXEC assumes O_CLOEXEC");
+      const int fd2 = fcntl(fd, F_DUPFD_CLOEXEC, high_fd);
+      if (fd2 != -1) {
+        // Successfully obtained high fd. Use it.
+        close(fd);
+        return fd2;
+      } else {
+        ABSL_RAW_LOG(WARNING, "Unable to dup fd=%d above %d, errno=%d", fd,
+                     high_fd, errno);
+      }
+    }
+    // Either open failed and fd==-1, or fd is already above high_fd, or fcntl
+    // failed and fd is valid (but low).
+    return fd;
+  }
+  return open(fname, kOpenFlags);
+}
+
 static std::atomic<Symbolizer *> g_cached_symbolizer;
 
 }  // namespace
@@ -541,11 +582,9 @@ static ABSL_ATTRIBUTE_NOINLINE bool GetSectionHeaderByType(
         (buf_bytes > num_bytes_left) ? num_bytes_left : buf_bytes;
     const off_t offset = sh_offset + static_cast<off_t>(i * sizeof(buf[0]));
     const ssize_t len = file->ReadFromOffset(buf, num_bytes_to_read, offset);
-    if (len < 0) {
-      ABSL_RAW_LOG(
-          WARNING,
-          "Reading %zu bytes from offset %ju returned %zd which is negative.",
-          num_bytes_to_read, static_cast<intmax_t>(offset), len);
+    if (len <= 0) {
+      ABSL_RAW_LOG(WARNING, "Reading %zu bytes from offset %ju returned %zd.",
+                   num_bytes_to_read, static_cast<intmax_t>(offset), len);
       return false;
     }
     if (static_cast<size_t>(len) % sizeof(buf[0]) != 0) {
@@ -1066,7 +1105,7 @@ static ABSL_ATTRIBUTE_NOINLINE bool ReadAddrMap(
   snprintf(maps_path, sizeof(maps_path), "/proc/self/task/%d/maps", getpid());
 
   int maps_fd;
-  NO_INTR(maps_fd = open(maps_path, O_RDONLY));
+  NO_INTR(maps_fd = OpenReadOnlyWithHighFD(maps_path));
   FileDescriptor wrapped_maps_fd(maps_fd);
   if (wrapped_maps_fd.get() < 0) {
     ABSL_RAW_LOG(WARNING, "%s: errno=%d", maps_path, errno);
@@ -1340,7 +1379,7 @@ static void MaybeOpenFdFromSelfExe(ObjFile *obj) {
   if (memcmp(obj->start_addr, ELFMAG, SELFMAG) != 0) {
     return;
   }
-  int fd = open("/proc/self/exe", O_RDONLY);
+  int fd = OpenReadOnlyWithHighFD("/proc/self/exe");
   if (fd == -1) {
     return;
   }
@@ -1364,7 +1403,7 @@ static void MaybeOpenFdFromSelfExe(ObjFile *obj) {
 
 static bool MaybeInitializeObjFile(ObjFile *obj) {
   if (obj->fd < 0) {
-    obj->fd = open(obj->filename, O_RDONLY);
+    obj->fd = OpenReadOnlyWithHighFD(obj->filename);
 
     if (obj->fd < 0) {
       // Getting /proc/self/exe here means that we were hinted.
@@ -1372,7 +1411,7 @@ static bool MaybeInitializeObjFile(ObjFile *obj) {
         // /proc/self/exe may be inaccessible (due to setuid, etc.), so try
         // accessing the binary via argv0.
         if (argv0_value != nullptr) {
-          obj->fd = open(argv0_value, O_RDONLY);
+          obj->fd = OpenReadOnlyWithHighFD(argv0_value);
         }
       } else {
         MaybeOpenFdFromSelfExe(obj);
diff --git a/contrib/restricted/abseil-cpp/absl/debugging/ya.make b/contrib/restricted/abseil-cpp/absl/debugging/ya.make
index 3c3aa2d8bc9..cff58f5fc82 100644
--- a/contrib/restricted/abseil-cpp/absl/debugging/ya.make
+++ b/contrib/restricted/abseil-cpp/absl/debugging/ya.make
@@ -6,7 +6,7 @@ LICENSE(Apache-2.0)
 
 LICENSE_TEXTS(.yandex_meta/licenses.list.txt)
 
-VERSION(20240722.1)
+VERSION(20250127.0)
 
 PEERDIR(
     contrib/restricted/abseil-cpp/absl/base