mirror of
https://github.com/tinygo-org/tinygo.git
synced 2026-08-04 02:57:46 +00:00
Ayke van Laethem
120d17c124
This is not a scheduler in the runtime, instead every goroutine is mapped to a single OS thread - meaning 1:1 scheduling. While this may not perform well (or at all) for large numbers of threads, it greatly simplifies many things in the runtime. For example, blocking syscalls can be called directly instead of having to use epoll or similar. Also, we don't need to do anything special to call C code - the default stack is all we need.
87 lines
2.4 KiB
Go
87 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")
|
|
return []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",
|
|
|
|
// 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",
|
|
}
|
|
},
|
|
needsLibc: true,
|
|
sourceDir: func() string {
|
|
return filepath.Join(goenv.Get("TINYGOROOT"), "lib/bdwgc")
|
|
},
|
|
librarySources: func(target string) ([]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
|
|
},
|
|
}
|