Add logging support for linux.

JerryScript-DCO-1.0-Signed-off-by: Andrey Shitov a.shitov@samsung.com

jerry-core/CMakeLists.txt

@@ -140,6 +140,11 @@ project (JerryCore CXX C ASM)
   set(INCLUDE_CORE ${INCLUDE_CORE} ${INCLUDE_THIRD_PARTY_VALGRIND})
  endif()
 
+ # Log
+  if("${ENABLE_LOG}" STREQUAL "ON")
+   set(DEFINES_JERRY ${DEFINES_JERRY} JERRY_ENABLE_LOG)
+  endif()
+
 # Platform-specific configuration
  set(DEFINES_JERRY ${DEFINES_JERRY} ${DEFINES_JERRY_${PLATFORM_EXT}})
 

jerry-core/jerry.cpp

@@ -71,6 +71,11 @@ static bool jerry_api_available;
  */
 char jerry_extension_characters_buffer[CONFIG_EXTENSION_CHAR_BUFFER_SIZE];
 
+#ifdef JERRY_ENABLE_LOG
+int jerry_debug_level = 0;
+FILE *jerry_log_file = nullptr;
+#endif
+
 /**
  * Assert that it is correct to call API in current state.
  *
@@ -1119,6 +1124,13 @@ jerry_api_eval (const char *source_p, /**< source code */
 void
 jerry_init (jerry_flag_t flags) /**< combination of Jerry flags */
 {
+  if (flags & (JERRY_FLAG_ENABLE_LOG))
+  {
+#ifndef JERRY_ENABLE_LOG
+    JERRY_WARNING_MSG ("Ignoring log options because of '!JERRY_ENABLE_LOG' build configuration.\n");
+#endif
+  }
+
   if (flags & (JERRY_FLAG_MEM_STATS))
   {
 #ifndef MEM_STATS
@@ -1126,14 +1138,15 @@ jerry_init (jerry_flag_t flags) /**< combination of Jerry flags */
                | JERRY_FLAG_MEM_STATS_PER_OPCODE
                | JERRY_FLAG_MEM_STATS_SEPARATE);
 
-    printf ("Ignoring memory statistics option because of '!MEM_STATS' build configuration.\n");
+    JERRY_WARNING_MSG ("Ignoring memory statistics option because of '!MEM_STATS' build configuration.\n");
 #endif /* !MEM_STATS */
   }
   else if (flags & (JERRY_FLAG_MEM_STATS_PER_OPCODE | JERRY_FLAG_MEM_STATS_SEPARATE))
   {
     flags &= ~(JERRY_FLAG_MEM_STATS_PER_OPCODE | JERRY_FLAG_MEM_STATS_SEPARATE);
 
-    printf ("Ignoring detailed memory statistics options because memory statistics dump mode is not enabled.\n");
+    JERRY_WARNING_MSG (
+      "Ignoring detailed memory statistics options because memory statistics dump mode is not enabled.\n");
   }
 
   jerry_flags = flags;

jerry-core/jerry.h

@@ -39,6 +39,7 @@ typedef uint32_t jerry_flag_t;
 #define JERRY_FLAG_MEM_STATS_SEPARATE     (1u << 3) /**< dump memory statistics and reset peak values after parse */
 #define JERRY_FLAG_PARSE_ONLY             (1u << 4) /**< parse only, prevents script execution (only for testing)
                                                      *   FIXME: Remove. */
+#define JERRY_FLAG_ENABLE_LOG             (1u << 5) /**< enable logging */
 
 /**
  * Error codes
@@ -67,6 +68,11 @@ extern const char *jerry_commit_hash;
  */
 extern const char *jerry_branch_name;
 
+#ifdef JERRY_ENABLE_LOG
+extern int jerry_debug_level;
+extern FILE *jerry_log_file;
+#endif /* JERRY_ENABLE_LOG */
+
 /**
  * Jerry error callback type
  */

jerry-core/jrt/jrt.h

@@ -16,6 +16,7 @@
 #ifndef JERRY_GLOBALS_H
 #define JERRY_GLOBALS_H
 
+#include <stdio.h>
 #include "jerry.h"
 #include "jrt-types.h"
 
@@ -92,6 +93,36 @@ extern void __noreturn jerry_unimplemented (const char *comment, const char *fil
 #define JERRY_ASSERT(x) do { if (false) { (void)(x); } } while (0)
 #endif /* !JERRY_NDEBUG */
 
+#ifdef JERRY_ENABLE_LOG
+#define JERRY_LOG(lvl, ...) \
+  do \
+  { \
+    if (lvl <= jerry_debug_level && jerry_log_file) \
+    { \
+      fprintf (jerry_log_file, __VA_ARGS__); \
+    } \
+  } \
+  while (0)
+
+#define JERRY_DLOG(...) JERRY_LOG (1, __VA_ARGS__)
+#define JERRY_DDLOG(...) JERRY_LOG (2, __VA_ARGS__)
+#define JERRY_DDDLOG(...) JERRY_LOG (3, __VA_ARGS__)
+#else /* !JERRY_ENABLE_LOG */
+#define JERRY_DLOG(...) \
+  do \
+  { \
+    if (false) \
+    { \
+      jerry_ref_unused_variables (0, __VA_ARGS__); \
+    } \
+  } while (0)
+#define JERRY_DDLOG(...) JERRY_DLOG (__VA_ARGS__)
+#define JERRY_DDDLOG(...) JERRY_DLOG (__VA_ARGS__)
+#endif /* !JERRY_ENABLE_LOG */
+
+#define JERRY_ERROR_MSG(...) fprintf (stderr, __VA_ARGS__)
+#define JERRY_WARNING_MSG(...) JERRY_ERROR_MSG (__VA_ARGS__)
+
 /**
  * Mark for unreachable points and unimplemented cases
  */