Merge pull request #364 from xushiwei/q

patch: io, io/fs, os; llgo.string; c string library; demo: getcwd; abi.TypeName fix: error interface is public

_demo/getcwd/getcwd.go

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/c/os"
+)
+
+func main() {
+	wd := os.Getcwd(c.Alloca(os.PATH_MAX), os.PATH_MAX)
+	c.Printf(c.Str("cwd: %s\n"), wd)
+}

c/c.go

@@ -77,6 +77,65 @@ func Memset(s Pointer, c Int, n uintptr) Pointer
 
 // -----------------------------------------------------------------------------
 
+//go:linkname Strlen C.strlen
+func Strlen(s *Char) uintptr
+
+//go:linkname Strcpy C.strcpy
+func Strcpy(dst, src *Char) *Char
+
+//go:linkname Strncpy C.strncpy
+func Strncpy(dst, src *Char, n uintptr) *Char
+
+//go:linkname Strcat C.strcat
+func Strcat(dst, src *Char) *Char
+
+//go:linkname Strncat C.strncat
+func Strncat(dst, src *Char, n uintptr) *Char
+
+//go:linkname Strcmp C.strcmp
+func Strcmp(s1, s2 *Char) Int
+
+//go:linkname Strncmp C.strncmp
+func Strncmp(s1, s2 *Char, n uintptr) Int
+
+//go:linkname Strchr C.strchr
+func Strchr(s *Char, c Int) *Char
+
+//go:linkname Strrchr C.strrchr
+func Strrchr(s *Char, c Int) *Char
+
+//go:linkname Strstr C.strstr
+func Strstr(s1, s2 *Char) *Char
+
+//go:linkname Strdup C.strdup
+func Strdup(s *Char) *Char
+
+//go:linkname Strndup C.strndup
+func Strndup(s *Char, n uintptr) *Char
+
+//go:linkname Strtok C.strtok
+func Strtok(s, delim *Char) *Char
+
+//go:linkname Strerror C.strerror
+func Strerror(errnum Int) *Char
+
+//go:linkname Sprintf C.sprintf
+func Sprintf(s *Char, format *Char, __llgo_va_list ...any) Int
+
+//go:linkname Snprintf C.snprintf
+func Snprintf(s *Char, n uintptr, format *Char, __llgo_va_list ...any) Int
+
+//go:linkname Vsnprintf C.vsnprintf
+func Vsnprintf(s *Char, n uintptr, format *Char, ap Pointer) Int
+
+// -----------------------------------------------------------------------------
+
+// GoString converts a C string to a Go string.
+// TODO(xsw): any => int
+//
+//go:linkname GoString llgo.string
+func GoString(cstr *Char, __llgo_va_list /* n */ ...any) string
+
 //go:linkname GoStringData llgo.stringData
 func GoStringData(string) *Char
 

c/os/os.go

@@ -0,0 +1,225 @@
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package os
+
+// #include <sys/stat.h>
+// #include <limits.h>
+import "C"
+
+import (
+	_ "unsafe"
+
+	"github.com/goplus/llgo/c"
+)
+
+const (
+	LLGoPackage = "decl"
+)
+
+const (
+	PATH_MAX = C.PATH_MAX
+)
+
+type (
+	ModeT C.mode_t
+	UidT  C.uid_t
+	GidT  C.gid_t
+	OffT  C.off_t
+	DevT  C.dev_t
+	StatT C.struct_stat
+)
+
+//go:linkname Errno errno
+var Errno c.Int
+
+//go:linkname Umask C.umask
+func Umask(cmask ModeT) ModeT
+
+//go:linkname Mkdir C.mkdir
+func Mkdir(path *c.Char, mode ModeT) c.Int
+
+//go:linkname Rmdir C.rmdir
+func Rmdir(path *c.Char) c.Int
+
+//go:linkname Link C.link
+func Link(oldpath *c.Char, newpath *c.Char) c.Int
+
+//go:linkname Symlink C.symlink
+func Symlink(target *c.Char, linkpath *c.Char) c.Int
+
+//go:linkname Readlink C.readlink
+func Readlink(path *c.Char, buf c.Pointer, bufsize uintptr) int
+
+//go:linkname Unlink C.unlink
+func Unlink(path *c.Char) c.Int
+
+//go:linkname Remove C.remove
+func Remove(path *c.Char) c.Int
+
+//go:linkname Rename C.rename
+func Rename(oldpath *c.Char, newpath *c.Char) c.Int
+
+//go:linkname Stat C.stat
+func Stat(path *c.Char, buf *StatT) c.Int
+
+//go:linkname Lstat C.lstat
+func Lstat(path *c.Char, buf *StatT) c.Int
+
+//go:linkname Truncate C.truncate
+func Truncate(path *c.Char, length OffT) c.Int
+
+//go:linkname Chmod C.chmod
+func Chmod(path *c.Char, mode ModeT) c.Int
+
+//go:linkname Chown C.chown
+func Chown(path *c.Char, owner UidT, group GidT) c.Int
+
+//go:linkname Lchown C.lchown
+func Lchown(path *c.Char, owner UidT, group GidT) c.Int
+
+// -----------------------------------------------------------------------------
+
+//go:linkname Getcwd C.getcwd
+func Getcwd(buffer c.Pointer, size uintptr) *c.Char
+
+//go:linkname Chdir C.chdir
+func Chdir(path *c.Char) c.Int
+
+//go:linkname Chroot C.chroot
+func Chroot(path *c.Char) c.Int
+
+// -----------------------------------------------------------------------------
+
+//go:linkname Environ C.environ
+func Environ() **c.Char
+
+//go:linkname Getenv C.getenv
+func Getenv(name *c.Char) *c.Char
+
+//go:linkname Setenv C.setenv
+func Setenv(name *c.Char, value *c.Char, overwrite c.Int) c.Int
+
+//go:linkname Putenv C.putenv
+func Putenv(env *c.Char) c.Int
+
+//go:linkname Unsetenv C.unsetenv
+func Unsetenv(name *c.Char) c.Int
+
+//go:linkname Clearenv C.clearenv
+func Clearenv()
+
+// -----------------------------------------------------------------------------
+
+//go:linkname Fchdir C.fchdir
+func Fchdir(dirfd c.Int) c.Int
+
+//go:linkname Faccessat C.faccessat
+func Faccessat(dirfd c.Int, path *c.Char, mode c.Int, flags c.Int) c.Int
+
+//go:linkname Fchmodat C.fchmodat
+func Fchmodat(dirfd c.Int, path *c.Char, mode ModeT, flags c.Int) c.Int
+
+//go:linkname Fchownat C.fchownat
+func Fchownat(dirfd c.Int, path *c.Char, owner UidT, group GidT, flags c.Int) c.Int
+
+//go:linkname Fstatat C.fstatat
+func Fstatat(dirfd c.Int, path *c.Char, buf *StatT, flags c.Int) c.Int
+
+// -----------------------------------------------------------------------------
+
+//go:linkname Open C.open
+func Open(path *c.Char, flags c.Int, mode ModeT) c.Int
+
+//go:linkname Creat C.creat
+func Creat(path *c.Char, mode ModeT) c.Int
+
+//go:linkname Dup C.dup
+func Dup(fd c.Int) c.Int
+
+//go:linkname Dup2 C.dup2
+func Dup2(oldfd c.Int, newfd c.Int) c.Int
+
+/* TODO(xsw):
+On Alpha, IA-64, MIPS, SuperH, and SPARC/SPARC64, pipe() has the following prototype:
+struct fd_pair {
+	long fd[2];
+};
+struct fd_pair pipe(void);
+*/
+//go:linkname Pipe C.pipe
+func Pipe(fds *[2]c.Int) c.Int
+
+//go:linkname Mkfifo C.mkfifo
+func Mkfifo(path *c.Char, mode ModeT) c.Int
+
+//go:linkname Mknod C.mknod
+func Mknod(path *c.Char, mode ModeT, dev DevT) c.Int
+
+//go:linkname Close C.close
+func Close(fd c.Int) c.Int
+
+//go:linkname Read C.read
+func Read(fd c.Int, buf c.Pointer, count uintptr) int
+
+//go:linkname Write C.write
+func Write(fd c.Int, buf c.Pointer, count uintptr) int
+
+//go:linkname Lseek C.lseek
+func Lseek(fd c.Int, offset OffT, whence c.Int) OffT
+
+//go:linkname Fsync C.fsync
+func Fsync(fd c.Int) c.Int
+
+//go:linkname Ftruncate C.ftruncate
+func Ftruncate(fd c.Int, length OffT) c.Int
+
+//go:linkname Fchmod C.fchmod
+func Fchmod(fd c.Int, mode ModeT) c.Int
+
+//go:linkname Fchown C.fchown
+func Fchown(fd c.Int, owner UidT, group GidT) c.Int
+
+//go:linkname Fstat C.fstat
+func Fstat(fd c.Int, buf *StatT) c.Int
+
+//go:linkname Isatty C.isatty
+func Isatty(fd c.Int) c.Int
+
+// -----------------------------------------------------------------------------
+
+//go:linkname Exit C.exit
+func Exit(c.Int)
+
+//go:linkname Getpid C.getpid
+func Getpid() c.Int
+
+//go:linkname Getppid C.getppid
+func Getppid() c.Int
+
+//go:linkname Getuid C.getuid
+func Getuid() UidT
+
+//go:linkname Geteuid C.geteuid
+func Geteuid() UidT
+
+//go:linkname Getgid C.getgid
+func Getgid() GidT
+
+//go:linkname Getegid C.getegid
+func Getegid() GidT
+
+// -----------------------------------------------------------------------------

c/pthread/sync/sync.go

@@ -47,10 +47,10 @@ func (o *Once) Do(f func()) c.Int { return 0 }
 type MutexType c.Int
 
 const (
-	MutexNormal     MutexType = C.PTHREAD_MUTEX_NORMAL
-	MutexErrorCheck MutexType = C.PTHREAD_MUTEX_ERRORCHECK
-	MutexRecursive  MutexType = C.PTHREAD_MUTEX_RECURSIVE
-	MutexDefault    MutexType = C.PTHREAD_MUTEX_DEFAULT
+	MUTEX_NORMAL     MutexType = C.PTHREAD_MUTEX_NORMAL
+	MUTEX_ERRORCHECK MutexType = C.PTHREAD_MUTEX_ERRORCHECK
+	MUTEX_RECURSIVE  MutexType = C.PTHREAD_MUTEX_RECURSIVE
+	MUTEX_DEFAULT    MutexType = C.PTHREAD_MUTEX_DEFAULT
 )
 
 // MutexAttr is a mutex attribute object.

cl/_testdata/utf8/out.ll

@@ -59,7 +59,7 @@ _llgo_1:                                          ; preds = %_llgo_3
   store i64 7, ptr %4, align 4
   %5 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %2, align 8
   %6 = extractvalue %"github.com/goplus/llgo/internal/runtime.String" %5, 1
-  %7 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.NewStringSlice"(%"github.com/goplus/llgo/internal/runtime.String" %5, i64 %15, i64 %6)
+  %7 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.StringSlice"(%"github.com/goplus/llgo/internal/runtime.String" %5, i64 %15, i64 %6)
   %8 = call { i32, i64 } @"unicode/utf8.DecodeRuneInString"(%"github.com/goplus/llgo/internal/runtime.String" %7)
   %9 = extractvalue { i32, i64 } %8, 0
   %10 = extractvalue { i32, i64 } %8, 1
@@ -95,7 +95,7 @@ declare void @"unicode/utf8.init"()
 
 declare void @"github.com/goplus/llgo/internal/runtime.init"()
 
-declare %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.NewStringSlice"(%"github.com/goplus/llgo/internal/runtime.String", i64, i64)
+declare %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.StringSlice"(%"github.com/goplus/llgo/internal/runtime.String", i64, i64)
 
 declare { i32, i64 } @"unicode/utf8.DecodeRuneInString"(%"github.com/goplus/llgo/internal/runtime.String")
 

cl/_testlibc/once/in.go

@@ -14,6 +14,8 @@ func f() {
 }
 
 func main() {
+	println(c.GoString(c.Str("sync.Once demo\n"), 9))
+	println(c.GoString(c.Str("sync.Once demo\n")))
 	f()
 	f()
 }

cl/_testlibgo/os/in.go

@@ -0,0 +1,11 @@
+package main
+
+import "os"
+
+func main() {
+	wd, err := os.Getwd()
+	if err != nil {
+		panic(err)
+	}
+	println("cwd:", wd)
+}

cl/_testlibgo/os/out.ll

@@ -0,0 +1,95 @@
+; ModuleID = 'main'
+source_filename = "main"
+
+%"github.com/goplus/llgo/internal/runtime.String" = type { ptr, i64 }
+%"github.com/goplus/llgo/internal/runtime.iface" = type { ptr, ptr }
+%"github.com/goplus/llgo/internal/runtime.eface" = type { ptr, ptr }
+
+@"main.init$guard" = global i1 false, align 1
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
+@0 = private unnamed_addr constant [4 x i8] c"cwd:", align 1
+
+define void @main.init() {
+_llgo_0:
+  %0 = load i1, ptr @"main.init$guard", align 1
+  br i1 %0, label %_llgo_2, label %_llgo_1
+
+_llgo_1:                                          ; preds = %_llgo_0
+  store i1 true, ptr @"main.init$guard", align 1
+  call void @os.init()
+  br label %_llgo_2
+
+_llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
+  ret void
+}
+
+define i32 @main(i32 %0, ptr %1) {
+_llgo_0:
+  store i32 %0, ptr @__llgo_argc, align 4
+  store ptr %1, ptr @__llgo_argv, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.init"()
+  call void @main.init()
+  %2 = call { %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.iface" } @os.Getwd()
+  %3 = extractvalue { %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.iface" } %2, 0
+  %4 = extractvalue { %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.iface" } %2, 1
+  %5 = call ptr @"github.com/goplus/llgo/internal/runtime.IfaceType"(%"github.com/goplus/llgo/internal/runtime.iface" %4)
+  %6 = extractvalue %"github.com/goplus/llgo/internal/runtime.iface" %4, 1
+  %7 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %8 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %7, i32 0, i32 0
+  store ptr %5, ptr %8, align 8
+  %9 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %7, i32 0, i32 1
+  store ptr %6, ptr %9, align 8
+  %10 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %7, align 8
+  %11 = call ptr @"github.com/goplus/llgo/internal/runtime.IfaceType"(%"github.com/goplus/llgo/internal/runtime.iface" zeroinitializer)
+  %12 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %13 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %12, i32 0, i32 0
+  store ptr %11, ptr %13, align 8
+  %14 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %12, i32 0, i32 1
+  store ptr null, ptr %14, align 8
+  %15 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %12, align 8
+  %16 = call i1 @"github.com/goplus/llgo/internal/runtime.EfaceEqual"(%"github.com/goplus/llgo/internal/runtime.eface" %10, %"github.com/goplus/llgo/internal/runtime.eface" %15)
+  %17 = xor i1 %16, true
+  br i1 %17, label %_llgo_1, label %_llgo_2
+
+_llgo_1:                                          ; preds = %_llgo_0
+  %18 = call ptr @"github.com/goplus/llgo/internal/runtime.IfaceType"(%"github.com/goplus/llgo/internal/runtime.iface" %4)
+  %19 = extractvalue %"github.com/goplus/llgo/internal/runtime.iface" %4, 1
+  %20 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %21 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %20, i32 0, i32 0
+  store ptr %18, ptr %21, align 8
+  %22 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %20, i32 0, i32 1
+  store ptr %19, ptr %22, align 8
+  %23 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %20, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.Panic"(%"github.com/goplus/llgo/internal/runtime.eface" %23)
+  unreachable
+
+_llgo_2:                                          ; preds = %_llgo_0
+  %24 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %25 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %24, i32 0, i32 0
+  store ptr @0, ptr %25, align 8
+  %26 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %24, i32 0, i32 1
+  store i64 4, ptr %26, align 4
+  %27 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %24, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %27)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 32)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %3)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
+  ret i32 0
+}
+
+declare void @os.init()
+
+declare void @"github.com/goplus/llgo/internal/runtime.init"()
+
+declare { %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.iface" } @os.Getwd()
+
+declare i1 @"github.com/goplus/llgo/internal/runtime.EfaceEqual"(%"github.com/goplus/llgo/internal/runtime.eface", %"github.com/goplus/llgo/internal/runtime.eface")
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.IfaceType"(%"github.com/goplus/llgo/internal/runtime.iface")
+
+declare void @"github.com/goplus/llgo/internal/runtime.Panic"(%"github.com/goplus/llgo/internal/runtime.eface")
+
+declare void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String")
+
+declare void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8)

cl/_testrt/builtin/out.ll

@@ -229,14 +229,14 @@ _llgo_0:
   store i64 5, ptr %74, align 4
   %75 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %72, align 8
   %76 = extractvalue %"github.com/goplus/llgo/internal/runtime.String" %75, 1
-  %77 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.NewStringSlice"(%"github.com/goplus/llgo/internal/runtime.String" %75, i64 1, i64 %76)
+  %77 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.StringSlice"(%"github.com/goplus/llgo/internal/runtime.String" %75, i64 1, i64 %76)
   %78 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
   %79 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %78, i32 0, i32 0
   store ptr @0, ptr %79, align 8
   %80 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %78, i32 0, i32 1
   store i64 5, ptr %80, align 4
   %81 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %78, align 8
-  %82 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.NewStringSlice"(%"github.com/goplus/llgo/internal/runtime.String" %81, i64 1, i64 2)
+  %82 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.StringSlice"(%"github.com/goplus/llgo/internal/runtime.String" %81, i64 1, i64 2)
   %83 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
   %84 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %83, i32 0, i32 0
   store ptr @0, ptr %84, align 8
@@ -244,7 +244,7 @@ _llgo_0:
   store i64 5, ptr %85, align 4
   %86 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %83, align 8
   %87 = extractvalue %"github.com/goplus/llgo/internal/runtime.String" %86, 1
-  %88 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.NewStringSlice"(%"github.com/goplus/llgo/internal/runtime.String" %86, i64 5, i64 %87)
+  %88 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.StringSlice"(%"github.com/goplus/llgo/internal/runtime.String" %86, i64 5, i64 %87)
   %89 = extractvalue %"github.com/goplus/llgo/internal/runtime.String" %88, 1
   %90 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
   %91 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %90, i32 0, i32 0
@@ -654,7 +654,7 @@ declare void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8)
 
 declare void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64)
 
-declare %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.NewStringSlice"(%"github.com/goplus/llgo/internal/runtime.String", i64, i64)
+declare %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.StringSlice"(%"github.com/goplus/llgo/internal/runtime.String", i64, i64)
 
 declare void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String")
 

cl/builtin_test.go

@@ -137,6 +137,7 @@ func TestErrBuiltin(t *testing.T) {
 	test("advance", func(ctx *context) { ctx.advance(nil, nil) })
 	test("alloca", func(ctx *context) { ctx.alloca(nil, nil) })
 	test("allocaCStr", func(ctx *context) { ctx.allocaCStr(nil, nil) })
+	test("string", func(ctx *context) { ctx.string(nil, nil) })
 	test("stringData", func(ctx *context) { ctx.stringData(nil, nil) })
 	test("sigsetjmp", func(ctx *context) { ctx.sigsetjmp(nil, nil) })
 	test("siglongjmp", func(ctx *context) { ctx.siglongjmp(nil, nil) })

cl/import.go

@@ -381,8 +381,9 @@ const (
 	llgoAllocaCStr  = llgoInstrBase + 3
 	llgoAdvance     = llgoInstrBase + 4
 	llgoIndex       = llgoInstrBase + 5
-	llgoStringData  = llgoInstrBase + 6
-	llgoDeferData   = llgoInstrBase + 7
+	llgoDeferData   = llgoInstrBase + 6
+	llgoStringData  = llgoInstrBase + 7
+	llgoString      = llgoInstrBase + 8
 
 	llgoSigjmpbuf  = llgoInstrBase + 0xa
 	llgoSigsetjmp  = llgoInstrBase + 0xb
@@ -520,8 +521,8 @@ func ignoreName(name string) bool {
 	return strings.HasPrefix(name, "internal/") || strings.HasPrefix(name, "crypto/") ||
 		strings.HasPrefix(name, "arena.") || strings.HasPrefix(name, "maps.") ||
 		strings.HasPrefix(name, "time.") || strings.HasPrefix(name, "syscall.") ||
-		strings.HasPrefix(name, "os.") || strings.HasPrefix(name, "plugin.") ||
-		strings.HasPrefix(name, "reflect.") || strings.HasPrefix(name, "runtime/")
+		strings.HasPrefix(name, "plugin.") || strings.HasPrefix(name, "reflect.") ||
+		strings.HasPrefix(name, "runtime/")
 }
 
 // -----------------------------------------------------------------------------

cl/instr.go

@@ -74,6 +74,17 @@ func (p *context) allocaCStr(b llssa.Builder, args []ssa.Value) (ret llssa.Expr)
 	panic("allocaCStr(s string): invalid arguments")
 }
 
+// func string(cstr *int8, n ...int) *int8
+func (p *context) string(b llssa.Builder, args []ssa.Value) (ret llssa.Expr) {
+	if len(args) == 2 {
+		cstr := p.compileValue(b, args[0])
+		n := make([]llssa.Expr, 0, 1)
+		n = p.compileVArg(n, b, args[1])
+		return b.MakeString(cstr, n...)
+	}
+	panic("string(cstr *int8, n ...int): invalid arguments")
+}
+
 // func stringData(s string) *int8
 func (p *context) stringData(b llssa.Builder, args []ssa.Value) (ret llssa.Expr) {
 	if len(args) == 1 {
@@ -147,6 +158,7 @@ var llgoInstrs = map[string]int{
 	"index":       llgoIndex,
 	"alloca":      llgoAlloca,
 	"allocaCStr":  llgoAllocaCStr,
+	"string":      llgoString,
 	"stringData":  llgoStringData,
 	"pyList":      llgoPyList,
 	"sigjmpbuf":   llgoSigjmpbuf,
@@ -297,6 +309,8 @@ func (p *context) call(b llssa.Builder, act llssa.DoAction, call *ssa.CallCommon
 			ret = p.alloca(b, args)
 		case llgoAllocaCStr:
 			ret = p.allocaCStr(b, args)
+		case llgoString:
+			ret = p.string(b, args)
 		case llgoStringData:
 			ret = p.stringData(b, args)
 		case llgoAtomicLoad:

internal/build/build.go

@@ -719,9 +719,12 @@ type none struct{}
 
 var hasAltPkg = map[string]none{
 	"errors":      {},
+	"io":          {},
+	"io/fs":       {},
 	"math":        {},
 	"sync":        {},
 	"sync/atomic": {},
+	"os":          {},
 	"runtime":     {},
 }
 

internal/lib/io/fs/fs.go

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package fs
+
+// llgo:skipall
+import (
+	_ "unsafe"
+)
+
+// -----------------------------------------------------------------------------
+
+// A FileMode represents a file's mode and permission bits.
+// The bits have the same definition on all systems, so that
+// information about files can be moved from one system
+// to another portably. Not all bits apply to all systems.
+// The only required bit is [ModeDir] for directories.
+type FileMode uint32
+
+// -----------------------------------------------------------------------------
+
+// PathError records an error and the operation and file path that caused it.
+type PathError struct {
+	Op   string
+	Path string
+	Err  error
+}
+
+func (e *PathError) Error() string { return e.Op + " " + e.Path + ": " + e.Err.Error() }
+
+func (e *PathError) Unwrap() error { return e.Err }
+
+// Timeout reports whether this error represents a timeout.
+func (e *PathError) Timeout() bool {
+	t, ok := e.Err.(interface{ Timeout() bool })
+	return ok && t.Timeout()
+}
+
+// -----------------------------------------------------------------------------

internal/lib/io/io.go

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io
+
+// llgo:skipall
+import (
+	_ "unsafe"
+)

internal/lib/os/os.go

@@ -0,0 +1,292 @@
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package os
+
+// llgo:skipall
+import (
+	"io/fs"
+	_ "unsafe"
+
+	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/c/os"
+)
+
+const (
+	LLGoPackage = true
+)
+
+type (
+	FileMode = fs.FileMode
+)
+
+type timeout interface {
+	Timeout() bool
+}
+
+type PathError = fs.PathError
+
+// SyscallError records an error from a specific system call.
+type SyscallError struct {
+	Syscall string
+	Err     error
+}
+
+func (e *SyscallError) Error() string { return e.Syscall + ": " + e.Err.Error() }
+
+func (e *SyscallError) Unwrap() error { return e.Err }
+
+// Timeout reports whether this error represents a timeout.
+func (e *SyscallError) Timeout() bool {
+	t, ok := e.Err.(timeout)
+	return ok && t.Timeout()
+}
+
+// NewSyscallError returns, as an error, a new SyscallError
+// with the given system call name and error details.
+// As a convenience, if err is nil, NewSyscallError returns nil.
+func NewSyscallError(syscall string, err error) error {
+	if err == nil {
+		return nil
+	}
+	return &SyscallError{syscall, err}
+}
+
+// LinkError records an error during a link or symlink or rename
+// system call and the paths that caused it.
+type LinkError struct {
+	Op  string
+	Old string
+	New string
+	Err error
+}
+
+func (e *LinkError) Error() string {
+	return e.Op + " " + e.Old + " " + e.New + ": " + e.Err.Error()
+}
+
+func (e *LinkError) Unwrap() error {
+	return e.Err
+}
+
+func toMode(mode FileMode) os.ModeT {
+	panic("todo")
+}
+
+func toSyscallErr(errno c.Int) error {
+	panic("todo")
+}
+
+func toPathErr(op, path string, errno c.Int) error {
+	return &PathError{Op: op, Path: path, Err: toSyscallErr(errno)}
+}
+
+func Chdir(dir string) error {
+	ret := os.Chdir(c.AllocaCStr(dir))
+	if ret == 0 {
+		return nil
+	}
+	return toPathErr("chdir", dir, ret)
+}
+
+func Chmod(name string, mode FileMode) error {
+	ret := os.Chmod(c.AllocaCStr(name), toMode(mode))
+	if ret == 0 {
+		return nil
+	}
+	return toPathErr("chmod", name, ret)
+}
+
+func Chown(name string, uid, gid int) error {
+	ret := os.Chown(c.AllocaCStr(name), os.UidT(uid), os.GidT(gid))
+	if ret == 0 {
+		return nil
+	}
+	return toPathErr("chown", name, ret)
+}
+
+// TODO(xsw):
+// func Chtimes(name string, atime time.Time, mtime time.Time) error
+
+//go:linkname Clearenv C.clearenv
+func Clearenv()
+
+// TODO(xsw):
+// func DirFS(dir string) fs.FS
+// func Environ() []string
+// func Executable() (string, error)
+
+func Exit(code int) {
+	os.Exit(c.Int(code))
+}
+
+// TODO(xsw):
+// func Expand(s string, mapping func(string) string) string
+// func ExpandEnv(s string) string
+
+func Getegid() int {
+	return int(os.Getegid())
+}
+
+func Getenv(key string) string {
+	return c.GoString(os.Getenv(c.AllocaCStr(key)))
+}
+
+func Geteuid() int {
+	return int(os.Geteuid())
+}
+
+func Getgid() int {
+	return int(os.Getgid())
+}
+
+// TODO(xsw):
+// func Getgroups() ([]int, error)
+// func Getpagesize() int
+
+func Getpid() int {
+	return int(os.Getpid())
+}
+
+func Getppid() int {
+	return int(os.Getppid())
+}
+
+func Getuid() int {
+	return int(os.Getuid())
+}
+
+func Getwd() (dir string, err error) {
+	wd := os.Getcwd(c.Alloca(os.PATH_MAX), os.PATH_MAX)
+	if wd != nil {
+		return c.GoString(wd), nil
+	}
+	return "", toSyscallErr(os.Errno)
+}
+
+// TODO(xsw):
+// func Hostname() (name string, err error)
+// func IsExist(err error) bool
+// func IsNotExist(err error) bool
+// func IsPathSeparator(c uint8) bool
+// func IsPermission(err error) bool
+// func IsTimeout(err error) bool
+
+func Lchown(name string, uid, gid int) error {
+	ret := os.Lchown(c.AllocaCStr(name), os.UidT(uid), os.GidT(gid))
+	if ret == 0 {
+		return nil
+	}
+	return toPathErr("lchown", name, ret)
+}
+
+func Link(oldname, newname string) error {
+	ret := os.Link(c.AllocaCStr(oldname), c.AllocaCStr(newname))
+	if ret == 0 {
+		return nil
+	}
+	return &LinkError{"link", oldname, newname, toSyscallErr(ret)}
+}
+
+// TODO(xsw):
+// func LookupEnv(key string) (string, bool)
+
+func Mkdir(name string, perm FileMode) error {
+	ret := os.Mkdir(c.AllocaCStr(name), toMode(perm))
+	if ret == 0 {
+		return nil
+	}
+	return toPathErr("mkdir", name, ret)
+}
+
+// TODO(xsw):
+// func MkdirAll(path string, perm FileMode) error
+// func MkdirTemp(dir, pattern string) (string, error)
+// func NewSyscallError(syscall string, err error) error
+// func Pipe() (r *File, w *File, err error)
+// func ReadFile(name string) ([]byte, error)
+
+func Readlink(name string) (string, error) {
+	ptr := c.Alloca(os.PATH_MAX)
+	ret := os.Readlink(c.AllocaCStr(name), ptr, os.PATH_MAX)
+	if ret < os.PATH_MAX {
+		return c.GoString((*c.Char)(ptr), ret), nil
+	}
+	panic("todo: buffer too small")
+}
+
+func Remove(name string) error {
+	ret := os.Remove(c.AllocaCStr(name))
+	if ret == 0 {
+		return nil
+	}
+	return toPathErr("remove", name, ret)
+}
+
+// TODO(xsw):
+// func RemoveAll(path string) error
+
+func Rename(oldpath, newpath string) error {
+	ret := os.Rename(c.AllocaCStr(oldpath), c.AllocaCStr(newpath))
+	if ret == 0 {
+		return nil
+	}
+	return &LinkError{"rename", oldpath, newpath, toSyscallErr(ret)}
+}
+
+// TODO(xsw):
+// func SameFile(fi1, fi2 FileInfo) bool
+
+func Setenv(key, value string) error {
+	ret := os.Setenv(c.AllocaCStr(key), c.AllocaCStr(value), 1)
+	if ret == 0 {
+		return nil
+	}
+	return &SyscallError{"setenv", toSyscallErr(ret)}
+}
+
+func Symlink(oldname, newname string) error {
+	ret := os.Symlink(c.AllocaCStr(oldname), c.AllocaCStr(newname))
+	if ret == 0 {
+		return nil
+	}
+	return &LinkError{"symlink", oldname, newname, toSyscallErr(ret)}
+}
+
+// TODO(xsw):
+// func TempDir() string
+
+func Truncate(name string, size int64) error {
+	ret := os.Truncate(c.AllocaCStr(name), os.OffT(size))
+	if ret == 0 {
+		return nil
+	}
+	return toPathErr("truncate", name, ret)
+}
+
+func Unsetenv(key string) error {
+	ret := os.Unsetenv(c.AllocaCStr(key))
+	if ret == 0 {
+		return nil
+	}
+	return toSyscallErr(ret)
+}
+
+// TODO(xsw):
+// func UserCacheDir() (string, error)
+// func UserConfigDir() (string, error)
+// func UserHomeDir() (string, error)
+// func WriteFile(name string, data []byte, perm FileMode) error

internal/runtime/z_string.go

@@ -50,8 +50,7 @@ func StringCat(a, b String) String {
 func CStrCopy(dest unsafe.Pointer, s String) *int8 {
 	n := s.len
 	c.Memcpy(dest, s.data, uintptr(n))
-	arr := (*[1 << 30]int8)(dest)
-	arr[n] = 0
+	*(*int8)(c.Advance(dest, n)) = 0
 	return (*int8)(dest)
 }
 
@@ -60,7 +59,7 @@ func CStrDup(s String) *int8 {
 	return CStrCopy(dest, s)
 }
 
-func NewStringSlice(base String, i, j int) String {
+func StringSlice(base String, i, j int) String {
 	if i < 0 || j < i || j > base.len {
 		panic("string slice index out of bounds")
 	}
@@ -121,13 +120,21 @@ func StringToRunes(s string) []rune {
 	return data[:index:index]
 }
 
+func StringFromCStr(cstr *int8) (s String) {
+	return StringFrom(unsafe.Pointer(cstr), int(c.Strlen(cstr)))
+}
+
 func StringFromBytes(b Slice) (s String) {
-	if b.len == 0 {
+	return StringFrom(b.data, b.len)
+}
+
+func StringFrom(data unsafe.Pointer, n int) (s String) {
+	if n == 0 {
 		return
 	}
-	s.len = b.len
-	s.data = AllocU(uintptr(s.len))
-	c.Memcpy(s.data, b.data, uintptr(b.len))
+	s.len = n
+	s.data = AllocU(uintptr(n))
+	c.Memcpy(s.data, data, uintptr(n))
 	return
 }
 

ssa/abi/abi.go

@@ -154,7 +154,8 @@ func (b *Builder) TypeName(t types.Type) (ret string, pub bool) {
 		return fmt.Sprintf("[%v]%s", t.Len(), ret), pub
 	case *types.Named:
 		o := t.Obj()
-		return "_llgo_" + TypeName(o), o.Exported()
+		pkg := o.Pkg()
+		return "_llgo_" + FullName(pkg, o.Name()), (pkg == nil || o.Exported())
 	case *types.Interface:
 		if t.Empty() {
 			return "_llgo_any", true

ssa/datastruct.go

@@ -64,6 +64,25 @@ func (b Builder) getField(x Expr, idx int) Expr {
 	return Expr{fld, tfld}
 }
 
+// -----------------------------------------------------------------------------
+
+// MakeString creates a new string from a C string pointer and length.
+func (b Builder) MakeString(cstr Expr, n ...Expr) (ret Expr) {
+	if debugInstr {
+		log.Printf("MakeString %v\n", cstr.impl)
+	}
+	pkg := b.Pkg
+	prog := b.Prog
+	ret.Type = prog.String()
+	if len(n) == 0 {
+		ret.impl = b.Call(pkg.rtFunc("StringFromCStr"), cstr).impl
+	} else {
+		// TODO(xsw): remove Convert
+		ret.impl = b.Call(pkg.rtFunc("StringFrom"), cstr, b.Convert(prog.Int(), n[0])).impl
+	}
+	return
+}
+
 // StringData returns the data pointer of a string.
 func (b Builder) StringData(x Expr) Expr {
 	if debugInstr {
@@ -82,6 +101,8 @@ func (b Builder) StringLen(x Expr) Expr {
 	return Expr{ptr, b.Prog.Int()}
 }
 
+// -----------------------------------------------------------------------------
+
 // SliceData returns the data pointer of a slice.
 func (b Builder) SliceData(x Expr) Expr {
 	if debugInstr {
@@ -109,6 +130,8 @@ func (b Builder) SliceCap(x Expr) Expr {
 	return Expr{ptr, b.Prog.Int()}
 }
 
+// -----------------------------------------------------------------------------
+
 // The IndexAddr instruction yields the address of the element at
 // index `idx` of collection `x`.  `idx` is an integer expression.
 //
@@ -277,6 +300,8 @@ func (b Builder) Index(x, idx Expr, addr func(Expr) (Expr, bool)) Expr {
 	return b.Load(buf)
 }
 
+// -----------------------------------------------------------------------------
+
 // The Slice instruction yields a slice of an existing string, slice
 // or *array X between optional integer bounds Low and High.
 //
@@ -310,7 +335,7 @@ func (b Builder) Slice(x, low, high, max Expr) (ret Expr) {
 			high = b.StringLen(x)
 		}
 		ret.Type = x.Type
-		ret.impl = b.InlineCall(b.Pkg.rtFunc("NewStringSlice"), x, low, high).impl
+		ret.impl = b.InlineCall(b.Pkg.rtFunc("StringSlice"), x, low, high).impl
 		return
 	case *types.Slice:
 		nEltSize = SizeOf(prog, prog.Index(x.Type))