Aligning strings to 8 bytes

Author: udesou

src/array.c

@@ -496,8 +496,7 @@ JL_DLLEXPORT jl_value_t *jl_alloc_string(size_t len)
         // the Allocations Profiler. (See https://github.com/JuliaLang/julia/pull/43868 for more details.)
         s = jl_gc_pool_alloc_noinline(ptls, (char*)p - (char*)ptls, osize);
 #else
-        int pool_id = jl_gc_szclass_align8(allocsz);
-        s = jl_mmtk_gc_alloc_default(ptls, allocsz, jl_string_type);
+        s = jl_mmtk_gc_alloc_default(ptls, allocsz, 8, jl_string_type);
 #endif
     }
     else {

src/julia_internal.h

@@ -339,7 +339,7 @@ jl_value_t *jl_gc_pool_alloc_noinline(jl_ptls_t ptls, int pool_offset,
                                    int osize);
 jl_value_t *jl_gc_big_alloc_noinline(jl_ptls_t ptls, size_t allocsz);
 #ifdef MMTK_GC
-JL_DLLIMPORT jl_value_t *jl_mmtk_gc_alloc_default(jl_ptls_t ptls, int osize, void* ty);
+JL_DLLIMPORT jl_value_t *jl_mmtk_gc_alloc_default(jl_ptls_t ptls, int osize, size_t align, void* ty);
 JL_DLLIMPORT jl_value_t *jl_mmtk_gc_alloc_big(jl_ptls_t ptls, size_t allocsz);
 JL_DLLIMPORT extern void mmtk_post_alloc(void* mutator, void* obj, size_t bytes, int allocator);
 JL_DLLIMPORT extern void mmtk_initialize_collection(void* tls);
@@ -493,7 +493,7 @@ STATIC_INLINE jl_value_t *jl_gc_alloc_(jl_ptls_t ptls, size_t sz, void *ty)
     jl_value_t *v;
     const size_t allocsz = sz + sizeof(jl_taggedvalue_t);
     if (sz <= GC_MAX_SZCLASS) {
-        v = jl_mmtk_gc_alloc_default(ptls, allocsz, ty);
+        v = jl_mmtk_gc_alloc_default(ptls, allocsz, 16, ty);
     }
     else {
         if (allocsz < sz) // overflow in adding offs, size was "negative"

src/mmtk-gc.c

@@ -167,7 +167,7 @@ inline jl_value_t *jl_gc_pool_alloc_inner(jl_ptls_t ptls, int pool_offset, int o
     // TODO: drop this okay?
     // maybe_collect(ptls);
 
-    jl_value_t *v = jl_mmtk_gc_alloc_default(ptls, osize, NULL);
+    jl_value_t *v = jl_mmtk_gc_alloc_default(ptls, osize, 16, NULL);
     // TODO: this is done (without atomic operations) in jl_mmtk_gc_alloc_default; enable
     // here when that's edited?
     /*