[libc] Implement the 'remove' function on the GPU (#97096)

Summary:
Straightforward RPC implementation of the `remove` function for the GPU.
Copies over the string and calls `remove` on it, passing the result
back. This is required for building some `libc++` functionality.

2 files changed, 37 insertions, 0 deletions

diff --git a/libc/src/stdio/gpu/CMakeLists.txt b/libc/src/stdio/gpu/CMakeLists.txt
index 1b1e2a9..8940843 100644
--- a/libc/src/stdio/gpu/CMakeLists.txt
+++ b/libc/src/stdio/gpu/CMakeLists.txt
@@ -263,6 +263,17 @@ add_entrypoint_object(
 )
 
 add_entrypoint_object(
+  remove
+  SRCS
+    remove.cpp
+  HDRS
+    ../remove.h
+  DEPENDS
+    libc.include.stdio
+    .gpu_file
+)
+
+add_entrypoint_object(
   stdin
   SRCS
     stdin.cpp
diff --git a/libc/src/stdio/gpu/remove.cpp b/libc/src/stdio/gpu/remove.cpp
new file mode 100644
index 0000000..398be5f
--- /dev/null
+++ b/libc/src/stdio/gpu/remove.cpp
@@ -0,0 +1,26 @@
+//===-- Implementation of remove ------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/stdio/remove.h"
+#include "file.h"
+
+#include <stdio.h>
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(int, remove, (const char *path)) {
+  int ret;
+  rpc::Client::Port port = rpc::client.open<RPC_REMOVE>();
+  port.send_n(path, internal::string_length(path) + 1);
+  port.recv(
+      [&](rpc::Buffer *buffer) { ret = static_cast<int>(buffer->data[0]); });
+  port.close();
+  return ret;
+}
+
+} // namespace LIBC_NAMESPACE