Export of internal Abseil changes

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5d6734366ec54997df5234ac3b7e21015d7d5fde by Martijn Vels <mvels@google.com>:

Increase slop for unit test to reduce flakiness of test

PiperOrigin-RevId: 371935786

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6e97ff23e7f732ebf969bbc69102e5e677aae8cd by Martijn Vels <mvels@google.com>:

Add node and memory usage stats analysis to GetCordzStatistics.

PiperOrigin-RevId: 371893353

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17f7443e6f988f25efa25c2291c1cde191af2bf2 by Martijn Vels <mvels@google.com>:

Add check on n == 0 in CordReader::ReadCord, which breaks invariants in the ring buffer code.

PiperOrigin-RevId: 371738207
GitOrigin-RevId: 5d6734366ec54997df5234ac3b7e21015d7d5fde
Change-Id: I0fc883f4f49f2380ab9afddbdfe6eb5ccc15dfc3

1 files changed, 12 insertions, 0 deletions

diff --git a/absl/strings/internal/cordz_statistics.h b/absl/strings/internal/cordz_statistics.h
index 6e335c0b..1c93dfd0 100644
--- a/absl/strings/internal/cordz_statistics.h
+++ b/absl/strings/internal/cordz_statistics.h
@@ -28,6 +28,15 @@ namespace cord_internal {
 struct CordzStatistics {
   using MethodIdentifier = CordzUpdateTracker::MethodIdentifier;
 
+  // Node counts information
+  struct NodeCounts {
+    size_t flat = 0;
+    size_t external = 0;
+    size_t substring = 0;
+    size_t concat = 0;
+    size_t ring = 0;
+  };
+
   // The size of the cord in bytes. This matches the result of Cord::size().
   int64_t size = 0;
 
@@ -50,6 +59,9 @@ struct CordzStatistics {
   // A value of 0 implies the property has not been recorded.
   int64_t node_count = 0;
 
+  // Detailed node counts per type
+  NodeCounts node_counts;
+
   // The cord method responsible for sampling the cord.
   MethodIdentifier method = MethodIdentifier::kUnknown;