freestanding: add array support (stack only for now)

vlib/builtin/bare/.checks/checks.v

@@ -12,12 +12,13 @@ fn passed (msg string) {
 
 
 fn vcheck(vfile string) {
-	run_check := "v -freestanding --enable-globals run "
+	run_check := "v -show_c_cmd -freestanding --enable-globals run "
 	if 0 == os.system("$run_check $vfile/${vfile}.v") {
 		passed(run_check)
 	} else {
 		failed(run_check)
 	}
+	os.system("ls -lh $vfile/$vfile")
 	os.system("rm -f $vfile/$vfile")
 }
 

vlib/builtin/bare/.checks/linuxsys/linuxsys.v

@@ -165,7 +165,7 @@ fn check_mm_pages() {
 //pub fn mm_alloc(size u64) (voidptr, errno)
 
 fn check_mm_alloc() {
-	println ("checking check_mm_alloc")
+	println ("checking mm_alloc")
 
 	for i in 1 .. 2000 {
 		size := u64(i*1000)
@@ -201,6 +201,107 @@ fn check_mm_alloc() {
 	println ("mm_alloc passed")
 }
 
+fn check_int_array_ro() {
+	println ("trying check_int_array_ro")
+	a := [100,110,120,130]
+	assert a.len == 4
+	assert a[0] == 100
+	assert a[1] == 110
+	assert a[2] == 120
+	assert a[3] == 130
+	println ("check_int_array_ro passed")
+}
+
+fn check_int_array_rw() {
+	println ("trying check_int_array_rw")
+	mut a := [-10,-11,-12,-13]
+	assert a.len == 4
+	assert a[0] == -10
+	assert a[1] == -11
+	assert a[2] == -12
+	assert a[3] == -13
+	for i in 0..a.len {
+		b := -a[i] * 10
+		a[i] = b
+		assert a[i] == b
+	}
+	assert a[3] == 130
+
+	println ("check_int_array_rw passed")
+}
+
+fn check_int64_array_ro() {
+	println ("trying check_int64_array_ro")
+	a := [i64(1000),1100,1200,1300,1400]
+	assert a.len == 5
+	assert a[0] == 1000
+	assert a[1] == 1100
+	assert a[2] == 1200
+	assert a[3] == 1300
+	assert a[4] == 1400
+	println ("check_int64_array_ro passed")
+}
+
+fn check_voidptr_array_ro() {
+	println ("trying check_voidptr_array_ro")
+	a := [
+		voidptr(10000),
+		voidptr(11000),
+		voidptr(12000),
+		voidptr(13000),
+		voidptr(14000),
+		voidptr(15000)
+	]
+	assert a.len == 6
+	assert a[0] == voidptr(10000)
+	assert a[1] == voidptr(11000)
+	assert a[2] == voidptr(12000)
+	assert a[3] == voidptr(13000)
+	assert a[4] == voidptr(14000)
+	assert a[5] == voidptr(15000)
+	println ("check_voidptr_array_ro passed")
+}
+
+fn check_voidptr_array_rw() {
+	println ("trying check_voidptr_array_rw")
+	mut a := [
+		voidptr(-1),
+		voidptr(-1),
+		voidptr(-1),
+		voidptr(-1),
+		voidptr(-1),
+		voidptr(-1)
+	]
+	assert a.len == 6
+
+	assert a[0] == voidptr(-1)
+	assert a[1] == voidptr(-1)
+	assert a[2] == voidptr(-1)
+	assert a[3] == voidptr(-1)
+	assert a[4] == voidptr(-1)
+	assert a[5] == voidptr(-1)
+
+	a[0] = voidptr(100000)
+	assert a[0] == voidptr(100000)
+
+	a[1] = voidptr(110000)
+	assert a[1] == voidptr(110000)
+
+	a[2] = voidptr(120000)
+	assert a[2] == voidptr(120000)
+
+	a[3] = voidptr(130000)
+	assert a[3] == voidptr(130000)
+
+	a[4] = voidptr(140000)
+	assert a[4] == voidptr(140000)
+
+	a[5] = voidptr(150000)
+	assert a[5] == voidptr(150000)
+	println ("check_voidptr_array_rw passed")
+}
+
+
 fn main() {
 	check_read_write_pipe()
 	check_read_file()
@@ -210,5 +311,10 @@ fn main() {
 	check_mmap_one_page()
 	check_mm_pages()
 	check_mm_alloc()
+	check_int_array_ro()
+	check_int_array_rw()
+	check_int64_array_ro()
+	check_voidptr_array_ro()
+	check_voidptr_array_rw()
 	sys_exit(0)
 }

vlib/builtin/bare/array_bare.v

@@ -0,0 +1,36 @@
+module builtin
+
+pub struct array {
+pub:
+	data voidptr
+	len int
+	cap int
+	element_size int
+}
+
+// for now off the stack
+fn new_array_from_c_array(len, cap, elm_size int, c_array voidptr) array {
+	arr := array {
+		len: len
+		cap: cap
+		element_size: elm_size
+		data: c_array
+	}
+	return arr
+}
+
+// Private function. Used to implement array[] operator
+fn (a array) get(i int) voidptr {
+	if i < 0 || i >= a.len {
+		panic('array.get: index out of range') // FIXME: (i == $i, a.len == $a.len)')
+	}
+	return a.data + i * a.element_size
+}
+
+// Private function. Used to implement assigment to the array element.
+fn (a mut array) set(i int, val voidptr) {
+	if i < 0 || i >= a.len {
+		panic('array.set: index out of range') //FIXME: (i == $i, a.len == $a.len)')
+	}
+	mem_copy(a.data + a.element_size * i, val, a.element_size)
+}

vlib/builtin/bare/linuxsys_bare.v

@@ -17,12 +17,53 @@ pub enum wp_sys {
 }
 
 // First argument to waitid:
-pub enum wi_sys {
+pub enum wi_which {
 	p_all = 0
 	p_pid = 1
 	p_pgid = 2
 }
 
+pub enum wi_si_code {
+	cld_exited = 1 // child has exited
+	cld_killed = 2 // child was killed
+	cld_dumped = 3 // child terminated abnormally
+	cld_trapped = 4 // traced child has trapped
+	cld_stopped = 5 // child has stopped
+	cld_continued = 6 // stopped child has continued
+}
+
+/* Paraphrased from "man 2 waitid" on Linux
+
+	Upon successful return, waitid() fills in the
+	following fields of the siginfo_t structure
+	pointed to by infop:
+
+	si_pid, offset 0x10, int index 0x04:
+		The process ID of the child.
+
+	si_uid: offset 0x14, int index 0x05
+		The real user ID of the child.
+
+	si_signo: offset 0x00, int index 0x00
+		Always set to SIGCHLD.
+
+	si_status: ofset 0x18, int index 0x06
+		1 the exit status of the child, as given to _exit(2)
+			(or exit(3)) (sc_sys.cld_exited)
+		2 the signal that caused the child to terminate, stop,
+			or continue.
+		3 The si_code field can be used to determine how to
+			interpret this field.
+
+	si_code, set to one of (enum wi_si_code), offset 0x08, int index 0x02:
+		CLD_EXITED (child called _exit(2));
+		CLD_KILLED (child killed by signal);
+		CLD_DUMPED (child  killed by signal, and dumped core);
+		CLD_STOPPED (child stopped by signal);
+		CLD_TRAPPED (traced child has trapped);
+		CLD_CONTINUED (child continued by SIGCONT).
+*/
+
 pub enum fcntl {
 	fd_cloexec = 0x00000001
 	f_dupfd = 0x00000000

vlib/builtin/bare/mm_bare.v

@@ -1,7 +1,5 @@
 module builtin
 
-//__global buffer [128]byte
-
 pub fn mm_pages(size u64) u32 {
 	pages := (u64(size+u64(4))+u64(linux_mem.page_size))/u64(linux_mem.page_size)
 	return u32(pages)
@@ -14,16 +12,6 @@ pub fn mm_alloc(size u64) (byteptr, errno) {
 	mem_prot := mm_prot(int(mm_prot.prot_read) | int(mm_prot.prot_write))
 	mem_flags := map_flags(int(map_flags.map_private) | int(map_flags.map_anonymous))
 
-	//mps := i64_tos(buffer,80,i64(mem_prot),16)
-	//println(mps)
-	//mfs := i64_tos(buffer,80,i64(mem_flags),16)
-	//println(mfs)
-
-	//print("pages in: ")
-	//ps := i64_tos(buffer,80,i64(pages),16)
-	//println(ps)
-
-
 	a, e := sys_mmap(0, n_bytes, mem_prot, mem_flags, -1, 0)
 	if e == .enoerror {
 		mut ap := intptr(a)
@@ -37,20 +25,14 @@ pub fn mm_free(addr byteptr) errno {
 	ap := intptr(addr-4)
 	size := u64(*ap) * u64(linux_mem.page_size)
 
-	//aps := i64_tos(buffer,80,i64(addr),16)
-	//println(aps)
-
-	//ss := i64_tos(buffer,80,i64(size),16)
-	//print("size out: ")
-	//println(ss)
-
-	//pas := i64_tos(buffer,80,i64(ap),16)
-	//println(pas)
-
-	e := sys_munmap(ap, size)
-
-	//es := i64_tos(buffer,80,i64(e),16)
-	//println(es)
-
-	return e
+	return sys_munmap(ap, size)
+}
+
+pub fn mem_copy(dest0 voidptr, src0 voidptr, n int) voidptr {
+	mut dest := byteptr(dest0)
+	src := byteptr(src0)
+	for i in 0..n {
+		dest[i] = src[i]
+	}
+	return dest0
 }

vlib/builtin/bare/syscallwrapper_test.v

@@ -2,11 +2,14 @@ import os
 
 fn test_syscallwrappers() {
 	if true { return }
-	vexe := os.getenv("VEXE")
-	vn := vexe.len - 1
-	if vn > 1 {
-		dot_checks := vexe.substr(0,vn) + "vlib/builtin/bare/.checks"
+	$if linux {
+		$if x64 {
+			exe := os.executable()
+			vdir := os.dir(exe)
+			if vdir.len > 1 {
+				dot_checks := vdir + "/.checks"
 				assert os.dir_exists(dot_checks)
+
 				os.chdir(dot_checks)
 				checks_v := "checks.v"
 				assert os.file_exists(checks_v)
@@ -15,6 +18,8 @@ fn test_syscallwrappers() {
 				assert !rc.output.contains("failed")
 				assert rc.exit_code == 0
 			} else {
-		panic("Can't find v")
+				panic("Can't find test directory")
+			}
+		}
 	}
 }

vlib/compiler/cc.v

@@ -126,7 +126,7 @@ fn (v mut V) cc() {
 		v.out_name = v.out_name + '.so'
 	}
 	if v.pref.is_bare {
-		a << '-static -ffreestanding -nostdlib $vdir/vlib/os/bare/bare.S'
+		a << '-fno-stack-protector -static -ffreestanding -nostdlib $vdir/vlib/os/bare/bare.S'
 	}
 	if v.pref.build_mode == .build_module {
 		// Create the modules & out directory if it's not there.
@@ -263,7 +263,7 @@ fn (v mut V) cc() {
 	a << libs
 	// Without these libs compilation will fail on Linux
 	// || os.user_os() == 'linux'
-	if v.pref.build_mode != .build_module && (v.os == .linux || v.os == .freebsd || v.os == .openbsd ||
+	if !v.pref.is_bare && v.pref.build_mode != .build_module && (v.os == .linux || v.os == .freebsd || v.os == .openbsd ||
 		v.os == .netbsd || v.os == .dragonfly || v.os == .solaris) {
 		a << '-lm -lpthread '
 		// -ldl is a Linux only thing. BSDs have it in libc.
@@ -272,7 +272,7 @@ fn (v mut V) cc() {
 		}
 	}
 
-	if v.os == .js && os.user_os() == 'linux' {
+	if !v.pref.is_bare && v.os == .js && os.user_os() == 'linux' {
 		a << '-lm'
 	}
 

vlib/compiler/cheaders.v

@@ -206,4 +206,17 @@ typedef map map_string;
 	#define false 0
 #endif
 '
+
+bare_c_headers = '
+
+#define EMPTY_ARRAY_OF_ELEMS(x,n) (x[])
+#define TCCSKIP(x) x
+
+#ifdef __TINYC__
+#undef EMPTY_ARRAY_OF_ELEMS
+#define EMPTY_ARRAY_OF_ELEMS(x,n) (x[n])
+#undef TCCSKIP
+#define TCCSKIP(x)
+#endif
+'
 )

vlib/compiler/main.v

@@ -254,6 +254,8 @@ pub fn (v mut V) compile() {
 
 		if !v.pref.is_bare {
 			cgen.genln(c_headers)
+		} else {
+			cgen.genln(bare_c_headers)
 		}
 	}
 	v.generate_hotcode_reloading_declarations()