mirror of
https://github.com/tinygo-org/tinygo.git
synced 2026-07-26 06:38:42 +00:00
Ayke van Laethem
c08b2dfe06
This adds support for `-gc=boehm` on `-target=wasip1` and `-target=wasm` (in a browser or NodeJS). Notably it does *not* add Boehm GC support for `-target=wasip2`, since that target doesn't have a real libc.
89 lines
2.4 KiB
Go
89 lines
2.4 KiB
Go
package builder
|
|
|
|
// The well-known conservative Boehm-Demers-Weiser GC.
|
|
// This file provides a way to compile this GC for use with TinyGo.
|
|
|
|
import (
|
|
"path/filepath"
|
|
"strings"
|
|
|
|
"github.com/tinygo-org/tinygo/goenv"
|
|
)
|
|
|
|
var BoehmGC = Library{
|
|
name: "bdwgc",
|
|
cflags: func(target, headerPath string) []string {
|
|
libdir := filepath.Join(goenv.Get("TINYGOROOT"), "lib/bdwgc")
|
|
flags := []string{
|
|
// use a modern environment
|
|
"-DUSE_MMAP", // mmap is available
|
|
"-DUSE_MUNMAP", // return memory to the OS using munmap
|
|
"-DGC_BUILTIN_ATOMIC", // use compiler intrinsics for atomic operations
|
|
"-DNO_EXECUTE_PERMISSION", // don't make the heap executable
|
|
|
|
// specific flags for TinyGo
|
|
"-DALL_INTERIOR_POINTERS", // scan interior pointers (needed for Go)
|
|
"-DIGNORE_DYNAMIC_LOADING", // we don't support dynamic loading at the moment
|
|
"-DNO_GETCONTEXT", // musl doesn't support getcontext()
|
|
"-DGC_DISABLE_INCREMENTAL", // don't mess with SIGSEGV and such
|
|
|
|
// Use a minimal environment.
|
|
"-DNO_MSGBOX_ON_ERROR", // don't call MessageBoxA on Windows
|
|
"-DDONT_USE_ATEXIT",
|
|
"-DNO_GETENV",
|
|
|
|
// Special flag to work around the lack of __data_start in ld.lld.
|
|
// TODO: try to fix this in LLVM/lld directly so we don't have to
|
|
// work around it anymore.
|
|
"-DGC_DONT_REGISTER_MAIN_STATIC_DATA",
|
|
|
|
// Do not scan the stack. We have our own mechanism to do this.
|
|
"-DSTACK_NOT_SCANNED",
|
|
|
|
// Assertions can be enabled while debugging GC issues.
|
|
//"-DGC_ASSERTIONS",
|
|
|
|
// We use our own way of dealing with threads (that is a bit hacky).
|
|
// See src/runtime/gc_boehm.go.
|
|
//"-DGC_THREADS",
|
|
//"-DTHREAD_LOCAL_ALLOC",
|
|
|
|
"-I" + libdir + "/include",
|
|
}
|
|
return flags
|
|
},
|
|
needsLibc: true,
|
|
sourceDir: func() string {
|
|
return filepath.Join(goenv.Get("TINYGOROOT"), "lib/bdwgc")
|
|
},
|
|
librarySources: func(target string, _ bool) ([]string, error) {
|
|
sources := []string{
|
|
"allchblk.c",
|
|
"alloc.c",
|
|
"blacklst.c",
|
|
"dbg_mlc.c",
|
|
"dyn_load.c",
|
|
"finalize.c",
|
|
"headers.c",
|
|
"mach_dep.c",
|
|
"malloc.c",
|
|
"mark.c",
|
|
"mark_rts.c",
|
|
"misc.c",
|
|
"new_hblk.c",
|
|
"obj_map.c",
|
|
"os_dep.c",
|
|
"reclaim.c",
|
|
}
|
|
if strings.Split(target, "-")[2] == "windows" {
|
|
// Due to how the linker on Windows works (that doesn't allow
|
|
// undefined functions), we need to include these extra files.
|
|
sources = append(sources,
|
|
"mallocx.c",
|
|
"ptr_chck.c",
|
|
)
|
|
}
|
|
return sources, nil
|
|
},
|
|
}
|