update perfetto sdk to 51.2 and add update script (#9335)

third_party/perfetto/tnt/README.md

@@ -0,0 +1,12 @@
+To update the Perfetto library, run the following command from the tnt directory:
+```shell
+./update_perfetto.sh <version_tag>
+```
+
+For example:
+```shell
+./update_perfetto.sh v51.2
+```
+**Useful links:**
+https://perfetto.dev/
+https://perfetto.dev/docs/instrumentation/tracing-sdk

third_party/perfetto/tnt/README.txt

@@ -1,8 +0,0 @@
-Useful links:
-https://perfetto.dev/
-https://perfetto.dev/docs/instrumentation/tracing-sdk
-
-Perfetto was fetched as:
-git clone https://github.com/google/perfetto.git -b v50.1
-
-Only the sdk/ directory is needed.

third_party/perfetto/tnt/update_perfetto.sh

@@ -0,0 +1,86 @@
+#!/bin/bash
+
+set -euo pipefail
+
+function usage() {
+  echo "Usage: $0 [-h] <version_tag>"
+  echo "  -h: Display this help message"
+  echo "  <version_tag>: The Perfetto version to download (e.g., v50.1)"
+  exit 1
+}
+
+if [[ $# -ne 1 || "$1" == "-h" ]]; then
+  usage
+fi
+
+DOWNLOAD_REF=$1
+DOWNLOAD_URL="https://github.com/google/perfetto/archive/refs/tags/${DOWNLOAD_REF}.zip"
+ZIP_FILE_NAME="${DOWNLOAD_REF}.zip"
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+THIRD_PARTY_DIR="$(dirname "$(dirname "$SCRIPT_DIR")")"
+
+if ! command -v curl &> /dev/null; then
+    echo "Error: curl is not installed." >&2
+    exit 1
+fi
+
+if ! command -v unzip &> /dev/null; then
+    echo "Error: unzip is not installed." >&2
+    exit 1
+fi
+
+if ! command -v rsync &> /dev/null; then
+    echo "Error: rsync is not installed." >&2
+    exit 1
+fi
+
+cd "${THIRD_PARTY_DIR}"
+
+echo "Downloading Perfetto ${DOWNLOAD_REF}..."
+if ! curl -f -L -o "${ZIP_FILE_NAME}" "${DOWNLOAD_URL}"; then
+    echo "Error: Failed to download Perfetto ${DOWNLOAD_REF}." >&2
+    echo "Please check the version number and your network connection." >&2
+    rm -f "${ZIP_FILE_NAME}"
+    exit 1
+fi
+
+echo "Unzipping..."
+
+TEMP_DIR="perfetto_temp_unzip"
+# Clean up temp dir from previous runs, if any.
+rm -rf "${TEMP_DIR}"
+mkdir "${TEMP_DIR}"
+
+if ! unzip -q "${ZIP_FILE_NAME}" -d "${TEMP_DIR}"; then
+    echo "Error: Failed to unzip the downloaded file." >&2
+    rm -f "${ZIP_FILE_NAME}"
+    rm -rf "${TEMP_DIR}"
+    exit 1
+fi
+
+# The archive contains a single directory. Find it.
+EXTRACTED_DIR=$(find "${TEMP_DIR}" -mindepth 1 -maxdepth 1 -type d)
+
+if [ -z "${EXTRACTED_DIR}" ] || [ ! -d "${EXTRACTED_DIR}" ]; then
+    echo "Error: Could not find the extracted directory inside the archive." >&2
+    rm -f "${ZIP_FILE_NAME}"
+    rm -rf "${TEMP_DIR}"
+    exit 1
+fi
+
+echo "Replacing existing perfetto contents with new version..."
+# If perfetto_new exists, remove it.
+rm -rf perfetto_new
+mv "${EXTRACTED_DIR}" perfetto_new
+
+# The perfetto directory should contain the content of the sdk directory from the archive, and our tnt directory.
+rsync -a --delete perfetto_new/sdk/ perfetto/perfetto/
+
+echo "Cleaning up..."
+rm -rf "${ZIP_FILE_NAME}" perfetto_new "${TEMP_DIR}"
+
+echo "Staging changes..."
+git add perfetto
+
+echo "Done. Please commit the changes."