Fix deadlocks in GC on Windows.
[sbcl.git] / src / runtime / gc-common.c
index 1858839..7add951 100644 (file)
@@ -85,9 +85,9 @@ set_forwarding_pointer(lispobj * pointer, lispobj newspace_copy) {
     return newspace_copy;
 }
 
-long (*scavtab[256])(lispobj *where, lispobj object);
+sword_t (*scavtab[256])(lispobj *where, lispobj object);
 lispobj (*transother[256])(lispobj object);
-long (*sizetab[256])(lispobj *where);
+sword_t (*sizetab[256])(lispobj *where);
 struct weak_pointer *weak_pointers;
 
 os_vm_size_t bytes_consed_between_gcs = 12*1024*1024;
@@ -100,33 +100,29 @@ os_vm_size_t bytes_consed_between_gcs = 12*1024*1024;
 
 /* to copy a boxed object */
 lispobj
-copy_object(lispobj object, long nwords)
+copy_object(lispobj object, sword_t nwords)
 {
     return gc_general_copy_object(object, nwords, BOXED_PAGE_FLAG);
 }
 
 lispobj
-copy_code_object(lispobj object, long nwords)
+copy_code_object(lispobj object, sword_t nwords)
 {
     return gc_general_copy_object(object, nwords, CODE_PAGE_FLAG);
 }
 
-static long scav_lose(lispobj *where, lispobj object); /* forward decl */
+static sword_t scav_lose(lispobj *where, lispobj object); /* forward decl */
 
 /* FIXME: Most calls end up going to some trouble to compute an
  * 'n_words' value for this function. The system might be a little
  * simpler if this function used an 'end' parameter instead. */
 void
-scavenge(lispobj *start, long n_words)
+scavenge(lispobj *start, sword_t n_words)
 {
     lispobj *end = start + n_words;
     lispobj *object_ptr;
-    long n_words_scavenged;
-
-    for (object_ptr = start;
-         object_ptr < end;
-         object_ptr += n_words_scavenged) {
 
+    for (object_ptr = start; object_ptr < end;) {
         lispobj object = *object_ptr;
 #ifdef LISP_FEATURE_GENCGC
         if (forwarding_pointer_p(object_ptr))
@@ -141,16 +137,16 @@ scavenge(lispobj *start, long n_words)
                 if (forwarding_pointer_p(ptr)) {
                     /* Yes, there's a forwarding pointer. */
                     *object_ptr = LOW_WORD(forwarding_pointer_value(ptr));
-                    n_words_scavenged = 1;
+                    object_ptr++;
                 } else {
                     /* Scavenge that pointer. */
-                    n_words_scavenged =
+                    object_ptr +=
                         (scavtab[widetag_of(object)])(object_ptr, object);
                 }
             } else {
                 /* It points somewhere other than oldspace. Leave it
                  * alone. */
-                n_words_scavenged = 1;
+                object_ptr++;
             }
         }
 #if !defined(LISP_FEATURE_X86) && !defined(LISP_FEATURE_X86_64)
@@ -166,7 +162,6 @@ scavenge(lispobj *start, long n_words)
                checking a single word and it's anything other than a
                pointer, just hush it up */
             int widetag = widetag_of(object);
-            n_words_scavenged = 1;
 
             if ((scavtab[widetag] == scav_lose) ||
                 (((sizetab[widetag])(object_ptr)) > 1)) {
@@ -176,15 +171,15 @@ If you can reproduce this warning, please send a bug report\n\
 (see manual page for details).\n",
                         object, object_ptr);
             }
+            object_ptr++;
         }
 #endif
         else if (fixnump(object)) {
             /* It's a fixnum: really easy.. */
-            n_words_scavenged = 1;
+            object_ptr++;
         } else {
             /* It's some sort of header object or another. */
-            n_words_scavenged =
-                (scavtab[widetag_of(object)])(object_ptr, object);
+            object_ptr += (scavtab[widetag_of(object)])(object_ptr, object);
         }
     }
     gc_assert_verbose(object_ptr == end, "Final object pointer %p, start %p, end %p\n",
@@ -194,7 +189,7 @@ If you can reproduce this warning, please send a bug report\n\
 static lispobj trans_fun_header(lispobj object); /* forward decls */
 static lispobj trans_boxed(lispobj object);
 
-static long
+static sword_t
 scav_fun_pointer(lispobj *where, lispobj object)
 {
     lispobj *first_pointer;
@@ -317,23 +312,23 @@ trans_code(struct code *code)
 #ifdef LISP_FEATURE_GENCGC
     /* Cheneygc doesn't need this os_flush_icache, it flushes the whole
        spaces once when all copying is done. */
-    os_flush_icache((os_vm_address_t) (((long *)new_code) + nheader_words),
-                    ncode_words * sizeof(long));
+    os_flush_icache((os_vm_address_t) (((sword_t *)new_code) + nheader_words),
+                    ncode_words * sizeof(sword_t));
 
 #endif
 
-#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
+#ifdef LISP_FEATURE_X86
     gencgc_apply_code_fixups(code, new_code);
 #endif
 
     return new_code;
 }
 
-static long
+static sword_t
 scav_code_header(lispobj *where, lispobj object)
 {
     struct code *code;
-    long n_header_words, n_code_words, n_words;
+    sword_t n_header_words, n_code_words, n_words;
     lispobj entry_point;        /* tagged pointer to entry point */
     struct simple_fun *function_ptr; /* untagged pointer to entry point */
 
@@ -354,7 +349,7 @@ scav_code_header(lispobj *where, lispobj object)
 
         gc_assert_verbose(is_lisp_pointer(entry_point),
                           "Entry point %lx\n is not a lisp pointer.",
-                          (long)entry_point);
+                          (sword_t)entry_point);
 
         function_ptr = (struct simple_fun *) native_pointer(entry_point);
         gc_assert(widetag_of(function_ptr->header)==SIMPLE_FUN_HEADER_WIDETAG);
@@ -378,11 +373,11 @@ trans_code_header(lispobj object)
 }
 
 
-static long
+static sword_t
 size_code_header(lispobj *where)
 {
     struct code *code;
-    long nheader_words, ncode_words, nwords;
+    sword_t nheader_words, ncode_words, nwords;
 
     code = (struct code *) where;
 
@@ -395,7 +390,7 @@ size_code_header(lispobj *where)
 }
 
 #if !defined(LISP_FEATURE_X86) && ! defined(LISP_FEATURE_X86_64)
-static long
+static sword_t
 scav_return_pc_header(lispobj *where, lispobj object)
 {
     lose("attempted to scavenge a return PC header where=0x%08x object=0x%08x\n",
@@ -430,7 +425,7 @@ trans_return_pc_header(lispobj object)
  * have to figure out that the function is still live. */
 
 #if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
-static long
+static sword_t
 scav_closure_header(lispobj *where, lispobj object)
 {
     struct closure *closure;
@@ -450,7 +445,7 @@ scav_closure_header(lispobj *where, lispobj object)
 #endif
 
 #if !(defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64))
-static long
+static sword_t
 scav_fun_header(lispobj *where, lispobj object)
 {
     lose("attempted to scavenge a function header where=0x%08x object=0x%08x\n",
@@ -483,7 +478,7 @@ trans_fun_header(lispobj object)
  * instances
  */
 
-static long
+static sword_t
 scav_instance_pointer(lispobj *where, lispobj object)
 {
     lispobj copy, *first_pointer;
@@ -509,7 +504,7 @@ scav_instance_pointer(lispobj *where, lispobj object)
 
 static lispobj trans_list(lispobj object);
 
-static long
+static sword_t
 scav_list_pointer(lispobj *where, lispobj object)
 {
     lispobj first, *first_pointer;
@@ -593,7 +588,7 @@ trans_list(lispobj object)
  * scavenging and transporting other pointers
  */
 
-static long
+static sword_t
 scav_other_pointer(lispobj *where, lispobj object)
 {
     lispobj first, *first_pointer;
@@ -623,13 +618,13 @@ scav_other_pointer(lispobj *where, lispobj object)
  * immediate, boxed, and unboxed objects
  */
 
-static long
+static sword_t
 size_pointer(lispobj *where)
 {
     return 1;
 }
 
-static long
+static sword_t
 scav_immediate(lispobj *where, lispobj object)
 {
     return 1;
@@ -642,24 +637,24 @@ trans_immediate(lispobj object)
     return NIL; /* bogus return value to satisfy static type checking */
 }
 
-static long
+static sword_t
 size_immediate(lispobj *where)
 {
     return 1;
 }
 
 
-static long
+static sword_t
 scav_boxed(lispobj *where, lispobj object)
 {
     return 1;
 }
 
-static long
+static sword_t
 scav_instance(lispobj *where, lispobj object)
 {
     lispobj nuntagged;
-    long ntotal = HeaderValue(object);
+    sword_t ntotal = HeaderValue(object);
     lispobj layout = ((struct instance *)where)->slots[0];
 
     if (!layout)
@@ -689,7 +684,7 @@ trans_boxed(lispobj object)
 }
 
 
-static long
+static sword_t
 size_boxed(lispobj *where)
 {
     lispobj header;
@@ -705,7 +700,7 @@ size_boxed(lispobj *where)
 /* Note: on the sparc we don't have to do anything special for fdefns, */
 /* 'cause the raw-addr has a function lowtag. */
 #if !defined(LISP_FEATURE_SPARC)
-static long
+static sword_t
 scav_fdefn(lispobj *where, lispobj object)
 {
     struct fdefn *fdefn;
@@ -732,7 +727,7 @@ scav_fdefn(lispobj *where, lispobj object)
 }
 #endif
 
-static long
+static sword_t
 scav_unboxed(lispobj *where, lispobj object)
 {
     uword_t length;
@@ -759,7 +754,7 @@ trans_unboxed(lispobj object)
     return copy_unboxed_object(object, length);
 }
 
-static long
+static sword_t
 size_unboxed(lispobj *where)
 {
     lispobj header;
@@ -774,11 +769,11 @@ size_unboxed(lispobj *where)
 
 \f
 /* vector-like objects */
-static long
+static sword_t
 scav_base_string(lispobj *where, lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     /* NOTE: Strings contain one more byte of data than the length */
     /* slot indicates. */
@@ -793,7 +788,7 @@ static lispobj
 trans_base_string(lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     gc_assert(is_lisp_pointer(object));
 
@@ -808,11 +803,11 @@ trans_base_string(lispobj object)
     return copy_large_unboxed_object(object, nwords);
 }
 
-static long
+static sword_t
 size_base_string(lispobj *where)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     /* NOTE: A string contains one more byte of data (a terminating
      * '\0' to help when interfacing with C functions) than indicated
@@ -825,7 +820,7 @@ size_base_string(lispobj *where)
     return nwords;
 }
 
-static long
+static sword_t
 scav_character_string(lispobj *where, lispobj object)
 {
     struct vector *vector;
@@ -859,7 +854,7 @@ trans_character_string(lispobj object)
     return copy_large_unboxed_object(object, nwords);
 }
 
-static long
+static sword_t
 size_character_string(lispobj *where)
 {
     struct vector *vector;
@@ -880,7 +875,7 @@ static lispobj
 trans_vector(lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     gc_assert(is_lisp_pointer(object));
 
@@ -892,11 +887,11 @@ trans_vector(lispobj object)
     return copy_large_object(object, nwords);
 }
 
-static long
+static sword_t
 size_vector(lispobj *where)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -905,7 +900,7 @@ size_vector(lispobj *where)
     return nwords;
 }
 
-static long
+static sword_t
 scav_vector_nil(lispobj *where, lispobj object)
 {
     return 2;
@@ -918,18 +913,18 @@ trans_vector_nil(lispobj object)
     return copy_unboxed_object(object, 2);
 }
 
-static long
+static sword_t
 size_vector_nil(lispobj *where)
 {
     /* Just the header word and the length word */
     return 2;
 }
 
-static long
+static sword_t
 scav_vector_bit(lispobj *where, lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -942,7 +937,7 @@ static lispobj
 trans_vector_bit(lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     gc_assert(is_lisp_pointer(object));
 
@@ -953,11 +948,11 @@ trans_vector_bit(lispobj object)
     return copy_large_unboxed_object(object, nwords);
 }
 
-static long
+static sword_t
 size_vector_bit(lispobj *where)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -966,11 +961,11 @@ size_vector_bit(lispobj *where)
     return nwords;
 }
 
-static long
+static sword_t
 scav_vector_unsigned_byte_2(lispobj *where, lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -983,7 +978,7 @@ static lispobj
 trans_vector_unsigned_byte_2(lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     gc_assert(is_lisp_pointer(object));
 
@@ -994,11 +989,11 @@ trans_vector_unsigned_byte_2(lispobj object)
     return copy_large_unboxed_object(object, nwords);
 }
 
-static long
+static sword_t
 size_vector_unsigned_byte_2(lispobj *where)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1007,11 +1002,11 @@ size_vector_unsigned_byte_2(lispobj *where)
     return nwords;
 }
 
-static long
+static sword_t
 scav_vector_unsigned_byte_4(lispobj *where, lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1024,7 +1019,7 @@ static lispobj
 trans_vector_unsigned_byte_4(lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     gc_assert(is_lisp_pointer(object));
 
@@ -1034,11 +1029,11 @@ trans_vector_unsigned_byte_4(lispobj object)
 
     return copy_large_unboxed_object(object, nwords);
 }
-static long
+static sword_t
 size_vector_unsigned_byte_4(lispobj *where)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1048,11 +1043,11 @@ size_vector_unsigned_byte_4(lispobj *where)
 }
 
 
-static long
+static sword_t
 scav_vector_unsigned_byte_8(lispobj *where, lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1069,7 +1064,7 @@ static lispobj
 trans_vector_unsigned_byte_8(lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     gc_assert(is_lisp_pointer(object));
 
@@ -1080,11 +1075,11 @@ trans_vector_unsigned_byte_8(lispobj object)
     return copy_large_unboxed_object(object, nwords);
 }
 
-static long
+static sword_t
 size_vector_unsigned_byte_8(lispobj *where)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1094,11 +1089,11 @@ size_vector_unsigned_byte_8(lispobj *where)
 }
 
 
-static long
+static sword_t
 scav_vector_unsigned_byte_16(lispobj *where, lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1111,7 +1106,7 @@ static lispobj
 trans_vector_unsigned_byte_16(lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     gc_assert(is_lisp_pointer(object));
 
@@ -1122,11 +1117,11 @@ trans_vector_unsigned_byte_16(lispobj object)
     return copy_large_unboxed_object(object, nwords);
 }
 
-static long
+static sword_t
 size_vector_unsigned_byte_16(lispobj *where)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1135,11 +1130,11 @@ size_vector_unsigned_byte_16(lispobj *where)
     return nwords;
 }
 
-static long
+static sword_t
 scav_vector_unsigned_byte_32(lispobj *where, lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1152,7 +1147,7 @@ static lispobj
 trans_vector_unsigned_byte_32(lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     gc_assert(is_lisp_pointer(object));
 
@@ -1163,11 +1158,11 @@ trans_vector_unsigned_byte_32(lispobj object)
     return copy_large_unboxed_object(object, nwords);
 }
 
-static long
+static sword_t
 size_vector_unsigned_byte_32(lispobj *where)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1177,11 +1172,11 @@ size_vector_unsigned_byte_32(lispobj *where)
 }
 
 #if N_WORD_BITS == 64
-static long
+static sword_t
 scav_vector_unsigned_byte_64(lispobj *where, lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1194,7 +1189,7 @@ static lispobj
 trans_vector_unsigned_byte_64(lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     gc_assert(is_lisp_pointer(object));
 
@@ -1205,11 +1200,11 @@ trans_vector_unsigned_byte_64(lispobj object)
     return copy_large_unboxed_object(object, nwords);
 }
 
-static long
+static sword_t
 size_vector_unsigned_byte_64(lispobj *where)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1219,11 +1214,11 @@ size_vector_unsigned_byte_64(lispobj *where)
 }
 #endif
 
-static long
+static sword_t
 scav_vector_single_float(lispobj *where, lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1236,7 +1231,7 @@ static lispobj
 trans_vector_single_float(lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     gc_assert(is_lisp_pointer(object));
 
@@ -1247,11 +1242,11 @@ trans_vector_single_float(lispobj object)
     return copy_large_unboxed_object(object, nwords);
 }
 
-static long
+static sword_t
 size_vector_single_float(lispobj *where)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1260,11 +1255,11 @@ size_vector_single_float(lispobj *where)
     return nwords;
 }
 
-static long
+static sword_t
 scav_vector_double_float(lispobj *where, lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1277,7 +1272,7 @@ static lispobj
 trans_vector_double_float(lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     gc_assert(is_lisp_pointer(object));
 
@@ -1288,11 +1283,11 @@ trans_vector_double_float(lispobj object)
     return copy_large_unboxed_object(object, nwords);
 }
 
-static long
+static sword_t
 size_vector_double_float(lispobj *where)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1335,7 +1330,7 @@ static long
 size_vector_long_float(lispobj *where)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1347,11 +1342,11 @@ size_vector_long_float(lispobj *where)
 
 
 #ifdef SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG
-static long
+static sword_t
 scav_vector_complex_single_float(lispobj *where, lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1364,7 +1359,7 @@ static lispobj
 trans_vector_complex_single_float(lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     gc_assert(is_lisp_pointer(object));
 
@@ -1375,11 +1370,11 @@ trans_vector_complex_single_float(lispobj object)
     return copy_large_unboxed_object(object, nwords);
 }
 
-static long
+static sword_t
 size_vector_complex_single_float(lispobj *where)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1390,11 +1385,11 @@ size_vector_complex_single_float(lispobj *where)
 #endif
 
 #ifdef SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG
-static long
+static sword_t
 scav_vector_complex_double_float(lispobj *where, lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1407,7 +1402,7 @@ static lispobj
 trans_vector_complex_double_float(lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     gc_assert(is_lisp_pointer(object));
 
@@ -1418,11 +1413,11 @@ trans_vector_complex_double_float(lispobj object)
     return copy_large_unboxed_object(object, nwords);
 }
 
-static long
+static sword_t
 size_vector_complex_double_float(lispobj *where)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1438,7 +1433,7 @@ static long
 scav_vector_complex_long_float(lispobj *where, lispobj object)
 {
     struct vector *vector;
-    long length, nwords;
+    sword_t length, nwords;
 
     vector = (struct vector *) where;
     length = fixnum_value(vector->length);
@@ -1507,7 +1502,7 @@ trans_weak_pointer(lispobj object)
     return copy;
 }
 
-static long
+static sword_t
 size_weak_pointer(lispobj *where)
 {
     return WEAK_POINTER_NWORDS;
@@ -1691,11 +1686,10 @@ scav_hash_table_entries (struct hash_table *hash_table)
     }
 }
 
-long
+sword_t
 scav_vector (lispobj *where, lispobj object)
 {
     uword_t kv_length;
-    lispobj *kv_vector;
     struct hash_table *hash_table;
 
     /* SB-VM:VECTOR-VALID-HASHING-SUBTYPE is set for EQ-based and weak
@@ -1705,7 +1699,6 @@ scav_vector (lispobj *where, lispobj object)
         return 1;
 
     kv_length = fixnum_value(where[1]);
-    kv_vector = where + 2;  /* Skip the header and length. */
     /*FSHOW((stderr,"/kv_length = %d\n", kv_length));*/
 
     /* Scavenge element 0, which may be a hash-table structure. */
@@ -1860,7 +1853,7 @@ scan_weak_hash_tables (void)
  * initialization
  */
 
-static long
+static sword_t
 scav_lose(lispobj *where, lispobj object)
 {
     lose("no scavenge function for object 0x%08x (widetag 0x%x)\n",
@@ -1879,7 +1872,7 @@ trans_lose(lispobj object)
     return NIL; /* bogus return value to satisfy static type checking */
 }
 
-static long
+static sword_t
 size_lose(lispobj *where)
 {
     lose("no size function for object at 0x%08x (widetag 0x%x)\n",
@@ -1948,6 +1941,9 @@ gc_init_tables(void)
 #ifdef COMPLEX_LONG_FLOAT_WIDETAG
     scavtab[COMPLEX_LONG_FLOAT_WIDETAG] = scav_unboxed;
 #endif
+#ifdef SIMD_PACK_WIDETAG
+    scavtab[SIMD_PACK_WIDETAG] = scav_unboxed;
+#endif
     scavtab[SIMPLE_ARRAY_WIDETAG] = scav_boxed;
     scavtab[SIMPLE_BASE_STRING_WIDETAG] = scav_base_string;
 #ifdef SIMPLE_CHARACTER_STRING_WIDETAG
@@ -2186,6 +2182,9 @@ gc_init_tables(void)
     transother[SYMBOL_HEADER_WIDETAG] = trans_boxed;
     transother[CHARACTER_WIDETAG] = trans_immediate;
     transother[SAP_WIDETAG] = trans_unboxed;
+#ifdef SIMD_PACK_WIDETAG
+    transother[SIMD_PACK_WIDETAG] = trans_unboxed;
+#endif
     transother[UNBOUND_MARKER_WIDETAG] = trans_immediate;
     transother[NO_TLS_VALUE_MARKER_WIDETAG] = trans_immediate;
     transother[WEAK_POINTER_WIDETAG] = trans_weak_pointer;
@@ -2329,6 +2328,9 @@ gc_init_tables(void)
     sizetab[SYMBOL_HEADER_WIDETAG] = size_boxed;
     sizetab[CHARACTER_WIDETAG] = size_immediate;
     sizetab[SAP_WIDETAG] = size_unboxed;
+#ifdef SIMD_PACK_WIDETAG
+    sizetab[SIMD_PACK_WIDETAG] = size_unboxed;
+#endif
     sizetab[UNBOUND_MARKER_WIDETAG] = size_immediate;
     sizetab[NO_TLS_VALUE_MARKER_WIDETAG] = size_immediate;
     sizetab[WEAK_POINTER_WIDETAG] = size_weak_pointer;
@@ -2501,6 +2503,9 @@ looks_like_valid_lisp_pointer_p(lispobj pointer, lispobj *start_addr)
 #ifdef COMPLEX_LONG_FLOAT_WIDETAG
         case COMPLEX_LONG_FLOAT_WIDETAG:
 #endif
+#ifdef SIMD_PACK_WIDETAG
+        case SIMD_PACK_WIDETAG:
+#endif
         case SIMPLE_ARRAY_WIDETAG:
         case COMPLEX_BASE_STRING_WIDETAG:
 #ifdef COMPLEX_CHARACTER_STRING_WIDETAG
@@ -2656,8 +2661,24 @@ maybe_gc(os_context_t *context)
      * we may even be in a WITHOUT-INTERRUPTS. */
     gc_happened = funcall0(StaticSymbolFunction(SUB_GC));
     FSHOW((stderr, "/maybe_gc: gc_happened=%s\n",
-           (gc_happened == NIL) ? "NIL" : "T"));
-    if ((gc_happened != NIL) &&
+           (gc_happened == NIL)
+           ? "NIL"
+           : ((gc_happened == T)
+              ? "T"
+              : "0")));
+    /* gc_happened can take three values: T, NIL, 0.
+     *
+     * T means that the thread managed to trigger a GC, and post-gc
+     * must be called.
+     *
+     * NIL means that the thread is within without-gcing, and no GC
+     * has occurred.
+     *
+     * Finally, 0 means that *a* GC has occurred, but it wasn't
+     * triggered by this thread; success, but post-gc doesn't have
+     * to be called.
+     */
+    if ((gc_happened == T) &&
         /* See if interrupts are enabled or it's possible to enable
          * them. POST-GC has a similar check, but we don't want to
          * unlock deferrables in that case and get a pending interrupt
@@ -2891,7 +2912,7 @@ pair_interior_pointer(os_context_t *context, uword_t pointer,
     *register_pair = -1;
     for (i = 0; i < (sizeof(boxed_registers) / sizeof(int)); i++) {
         uword_t reg;
-        long offset;
+        sword_t offset;
         int index;
 
         index = boxed_registers[i];