std::rt: Update GC metadata in init

Author: brson

src/libstd/rt/mod.rs

@@ -186,6 +186,11 @@ pub fn start(_argc: int, _argv: **u8, crate_map: *u8, main: ~fn()) -> int {
 /// based on the RUST_LOG environment variable.
 pub fn init(crate_map: *u8) {
     logging::init(crate_map);
+    unsafe { rust_update_gc_metadata(crate_map) }
+
+    extern {
+        fn rust_update_gc_metadata(crate_map: *u8);
+    }
 }
 
 /// One-time runtime cleanup.

src/rt/rust_gc_metadata.cpp

@@ -79,6 +79,11 @@ rust_gc_metadata() {
     return (void *)global_safe_points;
 }
 
+extern "C" CDECL void
+rust_update_gc_metadata(const void* map) {
+    update_gc_metadata(map);
+}
+
 //
 // Local Variables:
 // mode: C++

src/rt/rustrt.def.in

@@ -178,6 +178,7 @@ rust_call_tydesc_glue
 tdefl_compress_mem_to_heap
 tinfl_decompress_mem_to_heap
 rust_gc_metadata
+rust_update_gc_metadata
 rust_uv_ip4_port
 rust_uv_ip6_port
 rust_uv_tcp_getpeername