添加调试日志

app/src/main/cpp/DebugLog.cpp

@@ -0,0 +1,98 @@
+#include "DebugLog.h"
+
+#include <android/log.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#include <cstdarg>
+#include <cstdio>
+#include <ctime>
+#include <mutex>
+
+namespace {
+
+std::mutex  g_mtx;
+FILE*       g_fp = nullptr;
+std::string g_path;
+constexpr size_t kMaxSize = 2 * 1024 * 1024; // 2 MB before rotation
+
+pid_t currentTid() {
+    return static_cast<pid_t>(syscall(SYS_gettid));
+}
+
+} // namespace
+
+namespace DebugLog {
+
+void init(const char* internalDataPath) {
+    std::lock_guard<std::mutex> lk(g_mtx);
+    if (g_fp) {
+        return; // already initialized
+    }
+
+    const char* base = (internalDataPath && *internalDataPath) ? internalDataPath : "/data/local/tmp";
+    g_path = std::string(base) + "/face_sdk_debug.log";
+
+    // Rotate once if current file is too large.
+    struct stat st{};
+    if (stat(g_path.c_str(), &st) == 0 && static_cast<size_t>(st.st_size) > kMaxSize) {
+        std::string backup = g_path + ".old";
+        std::remove(backup.c_str());
+        std::rename(g_path.c_str(), backup.c_str());
+    }
+
+    g_fp = std::fopen(g_path.c_str(), "a");
+    if (g_fp) {
+        time_t now = time(nullptr);
+        struct tm tm_info{};
+        localtime_r(&now, &tm_info);
+        char tbuf[64];
+        strftime(tbuf, sizeof(tbuf), "%Y-%m-%d %H:%M:%S", &tm_info);
+        std::fprintf(g_fp,
+                     "\n========== DebugLog opened @ %s (pid=%d) ==========\n",
+                     tbuf, getpid());
+        std::fflush(g_fp);
+    }
+
+    __android_log_print(ANDROID_LOG_INFO, "FACE_DBG",
+                        "DebugLog file path: %s", g_path.c_str());
+}
+
+void log(const char* fmt, ...) {
+    char buf[1024];
+    va_list ap;
+    va_start(ap, fmt);
+    int n = std::vsnprintf(buf, sizeof(buf), fmt, ap);
+    va_end(ap);
+    if (n < 0) return;
+
+    pid_t tid = currentTid();
+
+    timespec ts{};
+    clock_gettime(CLOCK_REALTIME, &ts);
+    struct tm tm_info{};
+    localtime_r(&ts.tv_sec, &tm_info);
+    char timebuf[32];
+    strftime(timebuf, sizeof(timebuf), "%H:%M:%S", &tm_info);
+
+    std::lock_guard<std::mutex> lk(g_mtx);
+    if (g_fp) {
+        std::fprintf(g_fp, "[%s.%03ld][tid=%d] %s\n",
+                     timebuf, ts.tv_nsec / 1000000, tid, buf);
+        std::fflush(g_fp);
+    }
+    __android_log_print(ANDROID_LOG_INFO, "FACE_DBG", "[tid=%d] %s", tid, buf);
+}
+
+void flush() {
+    std::lock_guard<std::mutex> lk(g_mtx);
+    if (g_fp) std::fflush(g_fp);
+}
+
+std::string getLogPath() {
+    std::lock_guard<std::mutex> lk(g_mtx);
+    return g_path;
+}
+
+} // namespace DebugLog