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Fix mmap on macOS x64

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This commit is contained in:
Jarred Sumner
2022-04-02 02:17:22 -07:00
parent db39c8e109
commit 95d68b26a6
2 changed files with 27 additions and 29 deletions
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32
src/javascript/jsc/node/syscall.zig
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@@ -104,19 +104,19 @@ pub fn chdir(destination: [:0]const u8) Maybe(void) {
}
pub fn stat(path: [:0]const u8) Maybe(os.Stat) {
var stat_ = comptime mem.zeroes(os.Stat);
var stat_ = mem.zeroes(os.Stat);
if (Maybe(os.Stat).errnoSys(sys.stat(path, &stat_), .stat)) |err| return err;
return Maybe(os.Stat){ .result = stat_ };
}
pub fn lstat(path: [:0]const u8) Maybe(os.Stat) {
var stat_ = comptime mem.zeroes(os.Stat);
var stat_ = mem.zeroes(os.Stat);
if (Maybe(os.Stat).errnoSys(C.lstat(path, &stat_), .lstat)) |err| return err;
return Maybe(os.Stat){ .result = stat_ };
}
pub fn fstat(fd: JSC.Node.FileDescriptor) Maybe(os.Stat) {
var stat_ = comptime mem.zeroes(os.Stat);
var stat_ = mem.zeroes(os.Stat);
if (Maybe(os.Stat).errnoSys(fstat_sym(fd, &stat_), .fstat)) |err| return err;
return Maybe(os.Stat){ .result = stat_ };
}
@@ -404,7 +404,7 @@ pub fn getFdPath(fd: fd_t, out_buffer: *[MAX_PATH_BYTES]u8) Maybe([]u8) {
/// Use of a mapped region can result in these signals:
/// * SIGSEGV - Attempted write into a region mapped as read-only.
/// * SIGBUS - Attempted access to a portion of the buffer that does not correspond to the file
fn sysmmap(
fn mmap(
ptr: ?[*]align(mem.page_size) u8,
length: usize,
prot: u32,
@@ -416,20 +416,16 @@ fn sysmmap(
system.mmap64
else
system.mmap;
const ioffset = @bitCast(i64, offset); // the OS treats this as unsigned
const rc = mmap_sym(ptr, length, prot, flags, fd, ioffset);
_ = if (builtin.link_libc) blk: {
if (rc != std.c.MAP.FAILED) return .{ .result = @ptrCast([*]align(mem.page_size) u8, @alignCast(mem.page_size, rc))[0..length] };
break :blk rc;
} else blk: {
const err = os.errno(rc);
if (err == .SUCCESS) return .{ .result = @intToPtr([*]align(mem.page_size) u8, rc)[0..length] };
break :blk rc;
};
return Maybe([]align(mem.page_size) u8).errnoSys(@ptrToInt(rc), .mmap).?;
if (rc == std.c.MAP.FAILED) {
return Maybe([]align(mem.page_size) u8){
.err = .{ .errno = @truncate(Syscall.Error.Int, @enumToInt(std.c.getErrno(@bitCast(i64, @ptrToInt(std.c.MAP.FAILED))))), .syscall = .mmap },
};
}
return Maybe([]align(mem.page_size) u8){.result = @ptrCast([*]align(mem.page_size) u8, @alignCast(mem.page_size, rc))[0..length] };
}
pub fn mmapFile(path: [:0]const u8, flags: u32) Maybe([]align(mem.page_size) u8) {
@@ -438,15 +434,15 @@ pub fn mmapFile(path: [:0]const u8, flags: u32) Maybe([]align(mem.page_size) u8)
.err => |err| return .{ .err = err },
};
const size = switch (stat(path)) {
.result => |stat| stat.size,
const size = switch (fstat(fd)) {
.result => |result| result.size,
.err => |err| {
_ = close(fd);
return .{ .err = err };
},
};
const map = switch (sysmmap(null, @intCast(usize, size), os.PROT.READ | os.PROT.WRITE, flags, fd, 0)) {
const map = switch (mmap(null, @intCast(usize, size), os.PROT.READ | os.PROT.WRITE, flags, fd, 0)) {
.result => |map| map,
.err => |err| {