MediaMetrics: Update to use std::string instead of String8
Test: adb shell dumpsys media.metrics
Test: atest mediametrics_tests
Bug: 184263266
Change-Id: Ic884a478ffb2397f107db66d70b2c77a39365ab5
diff --git a/services/mediametrics/MediaMetricsService.cpp b/services/mediametrics/MediaMetricsService.cpp
index bfc722e..7ee731e 100644
--- a/services/mediametrics/MediaMetricsService.cpp
+++ b/services/mediametrics/MediaMetricsService.cpp
@@ -23,6 +23,7 @@
#include <pwd.h> //getpwuid
+#include <android-base/stringprintf.h>
#include <android/content/pm/IPackageManagerNative.h> // package info
#include <audio_utils/clock.h> // clock conversions
#include <binder/IPCThreadState.h> // get calling uid
@@ -37,6 +38,7 @@
namespace android {
+using base::StringPrintf;
using mediametrics::Item;
using mediametrics::startsWith;
@@ -211,14 +213,12 @@
status_t MediaMetricsService::dump(int fd, const Vector<String16>& args)
{
- String8 result;
-
if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
- result.appendFormat("Permission Denial: "
+ const std::string result = StringPrintf("Permission Denial: "
"can't dump MediaMetricsService from pid=%d, uid=%d\n",
IPCThreadState::self()->getCallingPid(),
IPCThreadState::self()->getCallingUid());
- write(fd, result.string(), result.size());
+ write(fd, result.c_str(), result.size());
return NO_ERROR;
}
@@ -250,17 +250,18 @@
// dumpsys media.metrics audiotrack,codec
// or dumpsys media.metrics audiotrack codec
- result.append("Recognized parameters:\n");
- result.append("--all show all records\n");
- result.append("--clear clear out saved records\n");
- result.append("--heap show heap usage (top 100)\n");
- result.append("--help display help\n");
- result.append("--prefix X process records for component X\n");
- result.append("--since X X < 0: records from -X seconds in the past\n");
- result.append(" X = 0: ignore\n");
- result.append(" X > 0: records from X seconds since Unix epoch\n");
- result.append("--unreachable show unreachable memory (leaks)\n");
- write(fd, result.string(), result.size());
+ static constexpr char result[] =
+ "Recognized parameters:\n"
+ "--all show all records\n"
+ "--clear clear out saved records\n"
+ "--heap show heap usage (top 100)\n"
+ "--help display help\n"
+ "--prefix X process records for component X\n"
+ "--since X X < 0: records from -X seconds in the past\n"
+ " X = 0: ignore\n"
+ " X > 0: records from X seconds since Unix epoch\n"
+ "--unreachable show unreachable memory (leaks)\n";
+ write(fd, result, std::size(result));
return NO_ERROR;
} else if (args[i] == prefixOption) {
++i;
@@ -286,7 +287,7 @@
unreachable = true;
}
}
-
+ std::stringstream result;
{
std::lock_guard _l(mLock);
@@ -295,21 +296,22 @@
mItems.clear();
mAudioAnalytics.clear();
} else {
- result.appendFormat("Dump of the %s process:\n", kServiceName);
+ result << StringPrintf("Dump of the %s process:\n", kServiceName);
const char *prefixptr = prefix.size() > 0 ? prefix.c_str() : nullptr;
- dumpHeaders(result, sinceNs, prefixptr);
- dumpQueue(result, sinceNs, prefixptr);
+ result << dumpHeaders(sinceNs, prefixptr);
+ result << dumpQueue(sinceNs, prefixptr);
// TODO: maybe consider a better way of dumping audio analytics info.
const int32_t linesToDump = all ? INT32_MAX : 1000;
auto [ dumpString, lines ] = mAudioAnalytics.dump(linesToDump, sinceNs, prefixptr);
- result.append(dumpString.c_str());
+ result << dumpString;
if (lines == linesToDump) {
- result.append("-- some lines may be truncated --\n");
+ result << "-- some lines may be truncated --\n";
}
}
}
- write(fd, result.string(), result.size());
+ const std::string str = result.str();
+ write(fd, str.c_str(), str.size());
// Check heap and unreachable memory outside of lock.
if (heap) {
@@ -327,38 +329,37 @@
}
// dump headers
-void MediaMetricsService::dumpHeaders(String8 &result, int64_t sinceNs, const char* prefix)
+std::string MediaMetricsService::dumpHeaders(int64_t sinceNs, const char* prefix)
{
+ std::stringstream result;
if (mediametrics::Item::isEnabled()) {
- result.append("Metrics gathering: enabled\n");
+ result << "Metrics gathering: enabled\n";
} else {
- result.append("Metrics gathering: DISABLED via property\n");
+ result << "Metrics gathering: DISABLED via property\n";
}
- result.appendFormat(
+ result << StringPrintf(
"Since Boot: Submissions: %lld Accepted: %lld\n",
(long long)mItemsSubmitted.load(), (long long)mItemsFinalized);
- result.appendFormat(
+ result << StringPrintf(
"Records Discarded: %lld (by Count: %lld by Expiration: %lld)\n",
(long long)mItemsDiscarded, (long long)mItemsDiscardedCount,
(long long)mItemsDiscardedExpire);
if (prefix != nullptr) {
- result.appendFormat("Restricting to prefix %s", prefix);
+ result << "Restricting to prefix " << prefix << "\n";
}
if (sinceNs != 0) {
- result.appendFormat(
- "Emitting Queue entries more recent than: %lld\n",
- (long long)sinceNs);
+ result << "Emitting Queue entries more recent than: " << sinceNs << "\n";
}
+ return result.str();
}
// TODO: should prefix be a set<string>?
-void MediaMetricsService::dumpQueue(String8 &result, int64_t sinceNs, const char* prefix)
+std::string MediaMetricsService::dumpQueue(int64_t sinceNs, const char* prefix)
{
if (mItems.empty()) {
- result.append("empty\n");
- return;
+ return "empty\n";
}
-
+ std::stringstream result;
int slot = 0;
for (const auto &item : mItems) { // TODO: consider std::lower_bound() on mItems
if (item->getTimestamp() < sinceNs) { // sinceNs == 0 means all items shown
@@ -369,9 +370,10 @@
__func__, item->getKey().c_str(), prefix);
continue;
}
- result.appendFormat("%5d: %s\n", slot, item->toString().c_str());
+ result << StringPrintf("%5d: %s\n", slot, item->toString().c_str());
slot++;
}
+ return result.str();
}
//
diff --git a/services/mediametrics/MediaMetricsService.h b/services/mediametrics/MediaMetricsService.h
index 8bc8019..6234656 100644
--- a/services/mediametrics/MediaMetricsService.h
+++ b/services/mediametrics/MediaMetricsService.h
@@ -100,8 +100,8 @@
bool expirations(const std::shared_ptr<const mediametrics::Item>& item) REQUIRES(mLock);
// support for generating output
- void dumpQueue(String8 &result, int64_t sinceNs, const char* prefix) REQUIRES(mLock);
- void dumpHeaders(String8 &result, int64_t sinceNs, const char* prefix) REQUIRES(mLock);
+ std::string dumpQueue(int64_t sinceNs, const char* prefix) REQUIRES(mLock);
+ std::string dumpHeaders(int64_t sinceNs, const char* prefix) REQUIRES(mLock);
// support statsd pushed atoms
static bool isPullable(const std::string &key);