Initial support of Nintendo platform

(part of commit 9379c66 from Unity-Technologies/bdwgc)

Issue #173 (bdwgc).

* include/gc_config_macros.h [(!GC_WIN32_THREADS || GC_WIN32_PTHREADS
|| __CYGWIN32__ || __CYGWIN__) && GC_THREADS] (GC_PTHREADS): Do not
define if NN_PLATFORM_CTR or NN_BUILD_TARGET_PLATFORM_NX.
* include/private/gc_priv.h [NN_PLATFORM_CTR] (CLOCK_TYPE, GET_TIME,
MS_TIME_DIFF): Define macro.
* include/private/gc_priv.h [!PCR && (NN_PLATFORM_CTR
|| NINTENDO_SWITCH)] (STOP_WORLD, START_WORLD): Likewise.
* include/private/gcconfig.h [NN_PLATFORM_CTR] (ARM32,
mach_type_known): Likewise.
* include/private/gcconfig.h [NN_BUILD_TARGET_PLATFORM_NX]
(NINTENDO_SWITCH, mach_type_known): Likewise.
* include/private/gcconfig.h [NN_PLATFORM_CTR] (DATASTART, DATAEND,
STACKBOTTOM): Likewise.
* include/private/gcconfig.h [NINTENDO_SWITCH] (NO_HANDLE_FORK,
DATASTART, DATAEND, STACKBOTTOM): Likewise.
* include/private/gcconfig.h [NN_PLATFORM_CTR || NINTENDO_SWITCH]
(THREADS): Likewise.
* include/private/gcconfig.h [NINTENDO_SWITCH] (GET_MEM):
Likewise.
* misc.c [NN_PLATFORM_CTR || NINTENDO_SWITCH] (WRITE): Likewise.
* include/private/gc_priv.h [NN_PLATFORM_CTR] (n3ds_get_system_tick
n3ds_convert_tick_to_ms): Declare external function.
* include/private/gc_priv.h [!PCR && (NN_PLATFORM_CTR
|| NINTENDO_SWITCH)] (GC_stop_world, GC_start_world): Declare.
* include/private/gcconfig.h [NN_PLATFORM_CTR] (Image$$ZI$$ZI$$Base,
Image$$ZI$$ZI$$Limit, n3ds_get_stack_bottom): Likewise.
* include/private/gcconfig.h [NINTENDO_SWITCH] (__bss_end,
switch_get_stack_bottom): Likewise.
* include/private/gcconfig.h [NINTENDO_SWITCH] (switch_get_mem):
Likewise.
* misc.c [NN_PLATFORM_CTR] (n3ds_log_write): Likewise.
* misc.c [NINTENDO_SWITCH] (switch_log_write): Likewise.
* include/private/gcconfig.h [__aarch64__ && !LINUX && !DARWIN
&& !FREEBSD] (NOSYS): Do not define if NN_BUILD_TARGET_PLATFORM_NX.
* include/private/gcconfig.h [(__arm || __arm__ || __thumb__)
&& !NACL && !LINUX && !NETBSD && !FREEBSD && !OPENBSD && !DARWIN
&& !_WIN32 && !__CEGCC__ && !SYMBIAN] (NOSYS): Do not define
if NN_PLATFORM_CTR or NN_BUILD_TARGET_PLATFORM_NX.
* misc.c [!OS2 && !MACOS && !GC_ANDROID_LOG && !MSWIN32 && !MSWINCE]
(GC_stdout, GC_stderr, GC_log, GC_set_log_fd): Do not define if
NN_PLATFORM_CTR or NINTENDO_SWITCH.
* misc.c [NN_PLATFORM_CTR] (GC_init): Call GC_get_main_stack_base()
to set GC_stackbottom.
* os_dep.c (SBRK_ARG_T, OPT_MAP_ANON, GC_unix_mmap_get_mem,
GC_unix_sbrk_get_mem, GC_unix_get_mem): Do not define if
NINTENDO_SWITCH.
* os_dep.c [USE_MUNMAP]: Do not include unistd.h, sys/mman.h,
sys/stat.h, sys/types.h if NN_PLATFORM_CTR.
* os_dep.c [NN_PLATFORM_CTR || NINTENDO_SWITCH]
(GC_default_push_other_roots): Redirect to GC_push_all_stacks.

include/gc_config_macros.h

@@ -128,7 +128,8 @@
 
 #undef GC_PTHREADS
 #if (!defined(GC_WIN32_THREADS) || defined(GC_WIN32_PTHREADS) \
-     || defined(__CYGWIN32__) || defined(__CYGWIN__)) && defined(GC_THREADS)
+     || defined(__CYGWIN32__) || defined(__CYGWIN__)) && defined(GC_THREADS) \
+    && !defined(NN_PLATFORM_CTR) && !defined(NN_BUILD_TARGET_PLATFORM_NX)
   /* Posix threads. */
 # define GC_PTHREADS
 #endif

include/private/gc_priv.h

@@ -434,7 +434,13 @@ typedef char * ptr_t;   /* A generic pointer to which we can add        */
 # define CLOCK_TYPE DWORD
 # define GET_TIME(x) (void)(x = GetTickCount())
 # define MS_TIME_DIFF(a,b) ((long)((a)-(b)))
-#else /* !MSWIN32, !MSWINCE, !BSD_TIME */
+#elif defined(NN_PLATFORM_CTR)
+# define CLOCK_TYPE long long
+  CLOCK_TYPE n3ds_get_system_tick(void);
+  CLOCK_TYPE n3ds_convert_tick_to_ms(CLOCK_TYPE tick);
+# define GET_TIME(x) (void)(x = n3ds_get_system_tick())
+# define MS_TIME_DIFF(a,b) ((long)n3ds_convert_tick_to_ms((a)-(b)))
+#else /* !BSD_TIME && !NN_PLATFORM_CTR && !MSWIN32 && !MSWINCE */
 # include <time.h>
 # if defined(FREEBSD) && !defined(CLOCKS_PER_SEC)
 #   include <machine/limits.h>
@@ -513,7 +519,8 @@ typedef char * ptr_t;   /* A generic pointer to which we can add        */
                                    PCR_allSigsBlocked, \
                                    PCR_waitForever)
 # else
-#   if defined(GC_WIN32_THREADS) || defined(GC_PTHREADS)
+#   if defined(NN_PLATFORM_CTR) || defined(NINTENDO_SWITCH) \
+       || defined(GC_WIN32_THREADS) || defined(GC_PTHREADS)
       GC_INNER void GC_stop_world(void);
       GC_INNER void GC_start_world(void);
 #     define STOP_WORLD() GC_stop_world()

include/private/gcconfig.h

@@ -131,7 +131,8 @@
 # endif
 # if defined(__aarch64__)
 #    define AARCH64
-#    if !defined(LINUX) && !defined(DARWIN) && !defined(FREEBSD)
+#    if !defined(LINUX) && !defined(DARWIN) && !defined(FREEBSD) \
+        && !defined(NN_BUILD_TARGET_PLATFORM_NX)
 #      define NOSYS
 #      define mach_type_known
 #    endif
@@ -141,8 +142,9 @@
 #    if defined(NACL)
 #      define mach_type_known
 #    elif !defined(LINUX) && !defined(NETBSD) && !defined(FREEBSD) \
-        && !defined(OPENBSD) && !defined(DARWIN) \
-        && !defined(_WIN32) && !defined(__CEGCC__) && !defined(SYMBIAN)
+          && !defined(OPENBSD) && !defined(DARWIN) && !defined(_WIN32) \
+          && !defined(__CEGCC__) && !defined(NN_PLATFORM_CTR) \
+          && !defined(NN_BUILD_TARGET_PLATFORM_NX) && !defined(SYMBIAN)
 #      define NOSYS
 #      define mach_type_known
 #    endif
@@ -616,6 +618,16 @@
 #   define mach_type_known
 # endif
 
+# if defined(NN_PLATFORM_CTR)
+#   define ARM32
+#   define mach_type_known
+# endif
+
+# if defined(NN_BUILD_TARGET_PLATFORM_NX)
+#   define NINTENDO_SWITCH
+#   define mach_type_known
+# endif
+
 # if defined(SYMBIAN)
 #   define mach_type_known
 # endif
@@ -2312,6 +2324,22 @@
 #     define DATAEND ((ptr_t)(&_end))
 #     define DYNAMIC_LOADING
 #   endif
+#   ifdef NN_PLATFORM_CTR
+      extern unsigned char Image$$ZI$$ZI$$Base[];
+#     define DATASTART (ptr_t)(Image$$ZI$$ZI$$Base)
+      extern unsigned char Image$$ZI$$ZI$$Limit[];
+#     define DATAEND (ptr_t)(Image$$ZI$$ZI$$Limit)
+      void *n3ds_get_stack_bottom(void);
+#     define STACKBOTTOM ((ptr_t)n3ds_get_stack_bottom())
+#   endif
+#   ifdef NINTENDO_SWITCH
+      extern int __bss_end[];
+#     define NO_HANDLE_FORK
+#     define DATASTART (ptr_t)ALIGNMENT /* cannot be null */
+#     define DATAEND (ptr_t)(&__bss_end)
+      void *switch_get_stack_bottom(void);
+#     define STACKBOTTOM ((ptr_t)switch_get_stack_bottom())
+#   endif
 #   ifdef NOSYS
       /* __data_start is usually defined in the target linker script.  */
       extern int __data_start[];
@@ -3036,6 +3064,7 @@
 #endif /* !CPPCHECK */
 
 #if defined(PCR) || defined(GC_WIN32_THREADS) || defined(GC_PTHREADS) \
+    || defined(NN_PLATFORM_CTR) || defined(NINTENDO_SWITCH) \
     || defined(SN_TARGET_PS3)
 # define THREADS
 #endif
@@ -3358,6 +3387,9 @@
 # elif defined(SN_TARGET_PS3)
     void *ps3_get_mem(size_t bytes);
 #   define GET_MEM(bytes) (struct hblk*)ps3_get_mem(bytes)
+# elif defined(NINTENDO_SWITCH)
+    void *switch_get_mem(size_t bytes);
+#   define GET_MEM(bytes) (struct hblk*)switch_get_mem(bytes)
 # elif defined(HAIKU)
     ptr_t GC_haiku_get_mem(size_t bytes);
 #   define GET_MEM(bytes) (struct  hblk*)GC_haiku_get_mem(bytes)

misc.c

@@ -764,6 +764,7 @@ GC_API int GC_CALL GC_is_init_called(void)
 #define GC_DEFAULT_STDERR_FD 2
 
 #if !defined(OS2) && !defined(MACOS) && !defined(GC_ANDROID_LOG) \
+    && !defined(NN_PLATFORM_CTR) && !defined(NINTENDO_SWITCH) \
     && !defined(MSWIN32) && !defined(MSWINCE)
   STATIC int GC_stdout = GC_DEFAULT_STDOUT_FD;
   STATIC int GC_stderr = GC_DEFAULT_STDERR_FD;
@@ -1147,6 +1148,7 @@ GC_API void GC_CALL GC_init(void)
         GC_init_netbsd_elf();
 #   endif
 #   if !defined(THREADS) || defined(GC_PTHREADS) \
+        || defined(NN_PLATFORM_CTR) || defined(NINTENDO_SWITCH) \
         || defined(GC_WIN32_THREADS) || defined(GC_SOLARIS_THREADS)
       if (GC_stackbottom == 0) {
         GC_stackbottom = GC_get_main_stack_base();
@@ -1539,6 +1541,13 @@ GC_API void GC_CALL GC_enable_incremental(void)
 # define WRITE(level, buf, unused_len) \
                 __android_log_write(level, GC_ANDROID_LOG_TAG, buf)
 
+# elif defined(NN_PLATFORM_CTR)
+    int n3ds_log_write(const char* text, int length);
+#   define WRITE(level, buf, len) n3ds_log_write(buf, len)
+# elif defined(NINTENDO_SWITCH)
+    int switch_log_write(const char* text, int length);
+#   define WRITE(level, buf, len) switch_log_write(buf, len)
+
 #else
 # if !defined(AMIGA) && !defined(__CC_ARM)
 #   include <unistd.h>

os_dep.c

@@ -2082,8 +2082,8 @@ void GC_register_data_segments(void)
 
 # if !defined(OS2) && !defined(PCR) && !defined(AMIGA) \
      && !defined(USE_WINALLOC) && !defined(MACOS) && !defined(DOS4GW) \
-     && !defined(NONSTOP) && !defined(SN_TARGET_PS3) && !defined(RTEMS) \
-     && !defined(__CC_ARM)
+     && !defined(NINTENDO_SWITCH) && !defined(NONSTOP) \
+     && !defined(SN_TARGET_PS3) && !defined(RTEMS) && !defined(__CC_ARM)
 
 # define SBRK_ARG_T ptrdiff_t
 
@@ -2447,7 +2447,7 @@ void * os2_alloc(size_t bytes)
 /* systems.  If you have something else, don't define           */
 /* USE_MUNMAP.                                                  */
 
-#if !defined(MSWIN32) && !defined(MSWINCE)
+#if !defined(NN_PLATFORM_CTR) && !defined(MSWIN32) && !defined(MSWINCE)
 # include <unistd.h>
 # ifdef SN_TARGET_PS3
 #   include <sys/memory.h>
@@ -2711,12 +2711,13 @@ STATIC void GC_CALLBACK GC_default_push_other_roots(void)
 
 # endif /* PCR */
 
-# if defined(GC_PTHREADS) || defined(GC_WIN32_THREADS)
+# if defined(NN_PLATFORM_CTR) || defined(NINTENDO_SWITCH) \
+     || defined(GC_PTHREADS) || defined(GC_WIN32_THREADS)
     STATIC void GC_CALLBACK GC_default_push_other_roots(void)
     {
       GC_push_all_stacks();
     }
-# endif /* GC_WIN32_THREADS || GC_PTHREADS */
+# endif
 
 # ifdef SN_TARGET_PS3
     STATIC void GC_CALLBACK GC_default_push_other_roots(void)