Implement DNS module (#1691)

* Boilerplate for DNS stuff

* Add c-ares

* lookup

* make

* Implement dns.lookup

* Create c-ares

* wip

* normalize

* repro

* Revert "repro"

This reverts commit 8b93e0c295b335b8882a9601da47720348549beb.

* Implement macOS `getaddrinfo_async_start`

* embiggen

* Update string_immutable.zig

* Update Makefile

* alright

* Update .gitignore

* Add types

* more ccache

* Update Dockerfile

* Update Dockerfile

* Update Dockerfile

* Update bun.d.ts

Co-authored-by: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>

1 files changed, 17 insertions, 6 deletions

diff --git a/src/c.zig b/src/c.zig
index 6e1a8632f..54be0878c 100644
--- a/src/c.zig
+++ b/src/c.zig
@@ -393,7 +393,7 @@ const LazyStatus = enum {
     failed,
 };
 
-pub fn dlsym(comptime Type: type, comptime name: [:0]const u8) ?Type {
+pub fn dlsymWithHandle(comptime Type: type, comptime name: [:0]const u8, comptime handle_getter: fn () ?*anyopaque) ?Type {
     if (comptime @typeInfo(Type) != .Pointer) {
         @compileError("dlsym must be a pointer type (e.g. ?const *fn()). Received " ++ @typeName(Type) ++ ".");
     }
@@ -404,11 +404,7 @@ pub fn dlsym(comptime Type: type, comptime name: [:0]const u8) ?Type {
     };
 
     if (Wrapper.loaded == .pending) {
-        const RTLD_DEFAULT = if (bun.Environment.isMac)
-            @intToPtr(?*anyopaque, @bitCast(usize, @as(isize, -2)))
-        else
-            @intToPtr(?*anyopaque, @as(usize, 0));
-        const result = std.c.dlsym(RTLD_DEFAULT, name);
+        const result = std.c.dlsym(@call(.always_inline, handle_getter, .{}), name);
 
         if (result) |ptr| {
             Wrapper.function = bun.cast(Type, ptr);
@@ -427,6 +423,21 @@ pub fn dlsym(comptime Type: type, comptime name: [:0]const u8) ?Type {
     return null;
 }
 
+pub fn dlsym(comptime Type: type, comptime name: [:0]const u8) ?Type {
+    const handle_getter = struct {
+        const RTLD_DEFAULT = if (bun.Environment.isMac)
+            @intToPtr(?*anyopaque, @bitCast(usize, @as(isize, -2)))
+        else
+            @intToPtr(?*anyopaque, @as(usize, 0));
+
+        pub fn getter() ?*anyopaque {
+            return RTLD_DEFAULT;
+        }
+    }.getter;
+
+    return dlsymWithHandle(Type, name, handle_getter);
+}
+
 // set in c-bindings.cpp
 pub extern fn get_process_priority(pid: c_uint) i32;
 pub extern fn set_process_priority(pid: c_uint, priority: c_int) i32;