diff options
Diffstat (limited to 'src/javascript/jsc/api/bun.zig')
| -rw-r--r-- | src/javascript/jsc/api/bun.zig | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/javascript/jsc/api/bun.zig b/src/javascript/jsc/api/bun.zig index 660f2aba8..de85d6c8f 100644 --- a/src/javascript/jsc/api/bun.zig +++ b/src/javascript/jsc/api/bun.zig @@ -1619,18 +1619,29 @@ pub fn mmapFile( const file_flags: u32 = if (@hasDecl(std.os.MAP, "FILE")) std.os.MAP.FILE else 0; // Conforming applications must specify either MAP_PRIVATE or MAP_SHARED. + var offset: usize = 0; var flags = file_flags; + var map_size: ?usize = null; if (args.nextEat()) |opts| { const sync = opts.get(ctx.ptr(), "sync") orelse JSC.JSValue.jsBoolean(false); const shared = opts.get(ctx.ptr(), "shared") orelse JSC.JSValue.jsBoolean(true); flags |= @as(u32, if (sync.toBoolean()) sync_flags else 0); flags |= @as(u32, if (shared.toBoolean()) std.os.MAP.SHARED else std.os.MAP.PRIVATE); + + if (opts.get(ctx.ptr(), "size")) |value| { + map_size = @intCast(usize, value.toInt64()); + } + + if (opts.get(ctx.ptr(), "offset")) |value| { + offset = @intCast(usize, value.toInt64()); + offset = std.mem.alignBackwardAnyAlign(offset, std.mem.page_size); + } } else { flags |= std.os.MAP.SHARED; } - const map = switch (JSC.Node.Syscall.mmapFile(buf_z, flags)) { + const map = switch (JSC.Node.Syscall.mmapFile(buf_z, flags, map_size, offset)) { .result => |map| map, .err => |err| { |