8228902: add os::dll_load to the unified logging os category

Reviewed-by: coleenp, mdoerr

src/hotspot/os/aix/os_aix.cpp

@@ -1313,6 +1313,8 @@ bool os::dll_address_to_library_name(address addr, char* buf,
 // for the same architecture as Hotspot is running on.
 void *os::dll_load(const char *filename, char *ebuf, int ebuflen) {
 
+  log_info(os)("attempting shared library load of %s", filename);
+
   if (ebuf && ebuflen > 0) {
     ebuf[0] = '\0';
     ebuf[ebuflen - 1] = '\0';
@@ -1329,6 +1331,7 @@ void *os::dll_load(const char *filename, char *ebuf, int ebuflen) {
     Events::log(NULL, "Loaded shared library %s", filename);
     // Reload dll cache. Don't do this in signal handling.
     LoadedLibraries::reload();
+    log_info(os)("shared library load of %s was successful", filename);
     return result;
   } else {
     // error analysis when dlopen fails
@@ -1341,6 +1344,7 @@ void *os::dll_load(const char *filename, char *ebuf, int ebuflen) {
                filename, ::getenv("LIBPATH"), ::getenv("LD_LIBRARY_PATH"), error_report);
     }
     Events::log(NULL, "Loading shared library %s failed, %s", filename, error_report);
+    log_info(os)("shared library load of %s failed, %s", filename, error_report);
   }
   return NULL;
 }

src/hotspot/os/bsd/os_bsd.cpp

@@ -1263,10 +1263,13 @@ void * os::dll_load(const char *filename, char *ebuf, int ebuflen) {
 #ifdef STATIC_BUILD
   return os::get_default_process_handle();
 #else
+  log_info(os)("attempting shared library load of %s", filename);
+
   void * result= ::dlopen(filename, RTLD_LAZY);
   if (result != NULL) {
     Events::log(NULL, "Loaded shared library %s", filename);
     // Successful loading
+    log_info(os)("shared library load of %s was successful", filename);
     return result;
   }
 
@@ -1280,6 +1283,7 @@ void * os::dll_load(const char *filename, char *ebuf, int ebuflen) {
     ebuf[ebuflen-1]='\0';
   }
   Events::log(NULL, "Loading shared library %s failed, %s", filename, error_report);
+  log_info(os)("shared library load of %s failed, %s", filename, error_report);
 
   return NULL;
 #endif // STATIC_BUILD
@@ -1289,10 +1293,12 @@ void * os::dll_load(const char *filename, char *ebuf, int ebuflen) {
 #ifdef STATIC_BUILD
   return os::get_default_process_handle();
 #else
+  log_info(os)("attempting shared library load of %s", filename);
   void * result= ::dlopen(filename, RTLD_LAZY);
   if (result != NULL) {
     Events::log(NULL, "Loaded shared library %s", filename);
     // Successful loading
+    log_info(os)("shared library load of %s was successful", filename);
     return result;
   }
 
@@ -1308,6 +1314,7 @@ void * os::dll_load(const char *filename, char *ebuf, int ebuflen) {
     ebuf[ebuflen-1]='\0';
   }
   Events::log(NULL, "Loading shared library %s failed, %s", filename, error_report);
+  log_info(os)("shared library load of %s failed, %s", filename, error_report);
 
   int diag_msg_max_length=ebuflen-strlen(ebuf);
   char* diag_msg_buf=ebuf+strlen(ebuf);

src/hotspot/os/linux/os_linux.cpp

@@ -1739,6 +1739,8 @@ void * os::dll_load(const char *filename, char *ebuf, int ebuflen) {
   void * result = NULL;
   bool load_attempted = false;
 
+  log_info(os)("attempting shared library load of %s", filename);
+
   // Check whether the library to load might change execution rights
   // of the stack. If they are changed, the protection of the stack
   // guard pages will be lost. We need a safepoint to fix this.
@@ -1990,8 +1992,10 @@ void * os::Linux::dlopen_helper(const char *filename, char *ebuf,
       ebuf[ebuflen-1]='\0';
     }
     Events::log(NULL, "Loading shared library %s failed, %s", filename, error_report);
+    log_info(os)("shared library load of %s failed, %s", filename, error_report);
   } else {
     Events::log(NULL, "Loaded shared library %s", filename);
+    log_info(os)("shared library load of %s was successful", filename);
   }
   return result;
 }

src/hotspot/os/solaris/os_solaris.cpp

@@ -1532,10 +1532,13 @@ static void change_endianness(Elf32_Half& val) {
 // same architecture as Hotspot is running on
 
 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) {
+  log_info(os)("attempting shared library load of %s", filename);
+
   void * result= ::dlopen(filename, RTLD_LAZY);
   if (result != NULL) {
     // Successful loading
     Events::log(NULL, "Loaded shared library %s", filename);
+    log_info(os)("shared library load of %s was successful", filename);
     return result;
   }
 
@@ -1550,6 +1553,7 @@ void * os::dll_load(const char *filename, char *ebuf, int ebuflen) {
   }
 
   Events::log(NULL, "Loading shared library %s failed, %s", filename, error_report);
+  log_info(os)("shared library load of %s failed, %s", filename, error_report);
 
   int diag_msg_max_length=ebuflen-strlen(ebuf);
   char* diag_msg_buf=ebuf+strlen(ebuf);

src/hotspot/os/windows/os_windows.cpp

@@ -1365,11 +1365,14 @@ static int _print_module(const char* fname, address base_address,
 // in case of error it checks if .dll/.so was built for the
 // same architecture as Hotspot is running on
 void * os::dll_load(const char *name, char *ebuf, int ebuflen) {
+  log_info(os)("attempting shared library load of %s", name);
+
   void * result = LoadLibrary(name);
   if (result != NULL) {
     Events::log(NULL, "Loaded shared library %s", name);
     // Recalculate pdb search path if a DLL was loaded successfully.
     SymbolEngine::recalc_search_path();
+    log_info(os)("shared library load of %s was successful", name);
     return result;
   }
   DWORD errcode = GetLastError();
@@ -1378,6 +1381,7 @@ void * os::dll_load(const char *name, char *ebuf, int ebuflen) {
   lasterror(ebuf, (size_t) ebuflen);
   ebuf[ebuflen - 1] = '\0';
   Events::log(NULL, "Loading shared library %s failed, error code %lu", name, errcode);
+  log_info(os)("shared library load of %s failed, error code %lu", name, errcode);
 
   if (errcode == ERROR_MOD_NOT_FOUND) {
     strncpy(ebuf, "Can't find dependent libraries", ebuflen - 1);