Fix stack overflow when console.log'ing strings

1 files changed, 12 insertions, 6 deletions

diff --git a/src/string_immutable.zig b/src/string_immutable.zig
index cf6f6126c..b09d6bd2d 100644
--- a/src/string_immutable.zig
+++ b/src/string_immutable.zig
@@ -3542,13 +3542,20 @@ test "firstNonASCII16" {
     }
 }
 
+fn getSharedBuffer() void {
+    return std.mem.asBytes(shared_temp_buffer_ptr orelse brk: {
+        shared_temp_buffer_ptr = bun.default_allocator.create([32 * 1024]u8) catch unreachable;
+        break :brk shared_temp_buffer_ptr.?;
+    });
+}
+threadlocal var shared_temp_buffer_ptr: ?*[32 * 1024]u8 = null;
+
 pub fn formatUTF16Type(comptime Slice: type, slice_: Slice, writer: anytype) !void {
+    var chunk = getSharedBuffer();
     var slice = slice_;
-    const chunk_size = 2048;
-    var chunk: [chunk_size + 4]u8 = undefined;
 
     while (slice.len > 0) {
-        const result = strings.copyUTF16IntoUTF8(&chunk, Slice, slice);
+        const result = strings.copyUTF16IntoUTF8(chunk, Slice, slice);
         if (result.read == 0 or result.written == 0)
             break;
         try writer.writeAll(chunk[0..result.written]);
@@ -3561,16 +3568,15 @@ pub fn formatUTF16(slice_: []align(1) const u16, writer: anytype) !void {
 }
 
 pub fn formatLatin1(slice_: []const u8, writer: anytype) !void {
+    var chunk = getSharedBuffer();
     var slice = slice_;
-    const chunk_size = 2048;
-    var chunk: [chunk_size + 4]u8 = undefined;
 
     while (strings.firstNonASCII(slice)) |i| {
         if (i > 0) {
             try writer.writeAll(slice[0..i]);
             slice = slice[i..];
         }
-        const result = strings.copyLatin1IntoUTF8(&chunk, @TypeOf(slice), slice[0..@min(chunk.len, slice.len)]);
+        const result = strings.copyLatin1IntoUTF8(chunk, @TypeOf(slice), slice[0..@min(chunk.len, slice.len)]);
         if (result.read == 0 or result.written == 0)
             break;
         try writer.writeAll(chunk[0..result.written]);