From 5b3709b3020dcb365c6bc1245dc143a7c2d9f10a Mon Sep 17 00:00:00 2001
From: Tanvi Jagtap <139093547+tanvi-jagtap@users.noreply.github.com>
Date: Tue, 10 Dec 2024 22:27:11 -0800
Subject: [PATCH] [PH2] Add new debug only trace flag (#38250)

[PH2] Add new debug only trace flag

Closes #38250

COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/38250 from tanvi-jagtap:add_new_debug_trace_flag 8ee186b8ab637d7e9e77846baf1fb12e924f57bb
PiperOrigin-RevId: 704972174
---
 doc/trace_flags.md                  | 1 +
 src/core/lib/debug/trace_flags.cc   | 2 ++
 src/core/lib/debug/trace_flags.h    | 1 +
 src/core/lib/debug/trace_flags.yaml | 4 ++++
 4 files changed, 8 insertions(+)

diff --git a/doc/trace_flags.md b/doc/trace_flags.md
index 4ea7129a28f48..d81086998a1cd 100644
--- a/doc/trace_flags.md
+++ b/doc/trace_flags.md
@@ -101,6 +101,7 @@ accomplished by invoking `bazel build --config=dbg <target>`
   - lb_policy_refcount - LB policy refcounting.
   - party_state - Coordination of activities related to a call.
   - pending_tags - Still-in-progress tags on completion queues. The `api` tracer must be enabled for this flag to have any effect.
+  - ph2 - Promise Based HTTP2 transport.
   - polling - The active polling engine.
   - polling_api - API calls to polling engine.
   - promise_primitives - Low-level primitives in the promise library.
diff --git a/src/core/lib/debug/trace_flags.cc b/src/core/lib/debug/trace_flags.cc
index 29963b4c1f649..addf4bd141167 100644
--- a/src/core/lib/debug/trace_flags.cc
+++ b/src/core/lib/debug/trace_flags.cc
@@ -35,6 +35,7 @@ DebugOnlyTraceFlag fd_trace_trace(false, "fd_trace");
 DebugOnlyTraceFlag lb_policy_refcount_trace(false, "lb_policy_refcount");
 DebugOnlyTraceFlag party_state_trace(false, "party_state");
 DebugOnlyTraceFlag pending_tags_trace(false, "pending_tags");
+DebugOnlyTraceFlag ph2_trace(false, "ph2");
 DebugOnlyTraceFlag polling_trace(false, "polling");
 DebugOnlyTraceFlag polling_api_trace(false, "polling_api");
 DebugOnlyTraceFlag promise_primitives_trace(false, "promise_primitives");
@@ -225,6 +226,7 @@ const absl::flat_hash_map<std::string, TraceFlag*>& GetAllTraceFlags() {
           {"lb_policy_refcount", &lb_policy_refcount_trace},
           {"party_state", &party_state_trace},
           {"pending_tags", &pending_tags_trace},
+          {"ph2", &ph2_trace},
           {"polling", &polling_trace},
           {"polling_api", &polling_api_trace},
           {"promise_primitives", &promise_primitives_trace},
diff --git a/src/core/lib/debug/trace_flags.h b/src/core/lib/debug/trace_flags.h
index f185adb65ecc6..c32d9c1768c8f 100644
--- a/src/core/lib/debug/trace_flags.h
+++ b/src/core/lib/debug/trace_flags.h
@@ -36,6 +36,7 @@ extern DebugOnlyTraceFlag fd_trace_trace;
 extern DebugOnlyTraceFlag lb_policy_refcount_trace;
 extern DebugOnlyTraceFlag party_state_trace;
 extern DebugOnlyTraceFlag pending_tags_trace;
+extern DebugOnlyTraceFlag ph2_trace;
 extern DebugOnlyTraceFlag polling_trace;
 extern DebugOnlyTraceFlag polling_api_trace;
 extern DebugOnlyTraceFlag promise_primitives_trace;
diff --git a/src/core/lib/debug/trace_flags.yaml b/src/core/lib/debug/trace_flags.yaml
index 11889710dcbc3..1999ba7020e79 100644
--- a/src/core/lib/debug/trace_flags.yaml
+++ b/src/core/lib/debug/trace_flags.yaml
@@ -225,6 +225,10 @@ pending_tags:
   debug_only: true
   default: false
   description: Still-in-progress tags on completion queues. The `api` tracer must be enabled for this flag to have any effect.
+ph2:
+  debug_only: true
+  default: false
+  description: Promise Based HTTP2 transport.
 pick_first:
   default: false
   description: Pick first load balancing policy.