build: make dynamic modules work on macos

bazel/BUILD

@@ -18,6 +18,7 @@ exports_files([
     "test_for_benchmark_wrapper.sh",
     "repository_locations.bzl",
     "exported_symbols.txt",
+    "exported_symbols_apple.txt",
 ])
 
 sh_library(

bazel/envoy_internal.bzl

@@ -211,15 +211,20 @@ def _envoy_select_perfetto(xs):
     })
 
 def envoy_exported_symbols_input():
-    return ["@envoy//bazel:exported_symbols.txt"]
+    return [
+        "@envoy//bazel:exported_symbols.txt",
+        "@envoy//bazel:exported_symbols_apple.txt",
+    ]
 
 # Default symbols to be exported.
-# TODO(wbpcode): make this work correctly for apple/darwin.
 def _envoy_default_exported_symbols():
     return select({
         "@envoy//bazel:linux": [
             "-Wl,--dynamic-list=$(location @envoy//bazel:exported_symbols.txt)",
         ],
+        "@envoy//bazel:apple": [
+            "-Wl,-exported_symbols_list,$(location @envoy//bazel:exported_symbols_apple.txt)",
+        ],
         "//conditions:default": [],
     })
 

bazel/exported_symbols.txt

@@ -1,4 +1,5 @@
 {
 	lua*;
 	envoyGo*;
+	envoy_dynamic_module_callback_*;
 };

bazel/exported_symbols_apple.txt

@@ -0,0 +1,3 @@
+_lua*
+_envoyGo*
+_envoy_dynamic_module_callback_*

ci/mac_ci_steps.sh

@@ -32,6 +32,7 @@ DEFAULT_TEST_TARGETS=(
   "//test/integration:protocol_integration_test"
   "//test/integration:tcp_proxy_integration_test"
   "//test/integration:extension_discovery_integration_test"
+  "//test/extensions/dynamic_modules/http:filter_test"
   "//test/integration:listener_lds_integration_test")
 
 if [[ $# -gt 0 ]]; then

source/extensions/dynamic_modules/BUILD

@@ -15,45 +15,6 @@ envoy_cc_library(
         "abi.h",
         "dynamic_modules.h",
     ],
-    linkopts = select({
-        "//bazel:apple": [],
-        "//conditions:default": [
-            # Export callback symbols so that they can be found by the dynamic modules when loaded via dlopen.
-            #
-            # Note: with lld, we can use the glob matching to avoid listing all the symbols, but gold and ld are
-            # not able to do that. So we list all the symbols here.
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_get_request_header",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_get_request_headers",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_get_request_headers_count",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_set_request_header",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_get_request_trailer",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_get_request_trailers",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_get_request_trailers_count",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_set_request_trailer",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_get_response_header",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_get_response_headers",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_get_response_headers_count",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_set_response_header",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_get_response_trailer",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_get_response_trailers",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_get_response_trailers_count",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_set_response_trailer",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_send_response",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_set_dynamic_metadata_number",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_get_dynamic_metadata_number",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_set_dynamic_metadata_string",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_get_dynamic_metadata_string",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_get_request_body_vector",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_get_request_body_vector_size",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_append_request_body",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_drain_request_body",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_get_response_body_vector",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_get_response_body_vector_size",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_append_response_body",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_drain_response_body",
-            "-Wl,--export-dynamic-symbol=envoy_dynamic_module_callback_http_clear_route_cache",
-        ],
-    }),
     deps = [
         ":abi_version_lib",
         "//envoy/common:exception_lib",

test/extensions/dynamic_modules/test_data/c/test_data.bzl

@@ -1,10 +1,11 @@
-load("@rules_cc//cc:defs.bzl", "cc_library")
+load("@rules_cc//cc:defs.bzl", "cc_library", "cc_shared_library")
 
 # This declares a cc_library target that is used to build a shared library.
 # name + ".c" is the source file that is compiled to create the shared library.
 def test_program(name):
+    _name = "_" + name
     cc_library(
-        name = name,
+        name = _name,
         srcs = [name + ".c"],
         hdrs = [
             "//source/extensions/dynamic_modules:abi.h",
@@ -18,3 +19,11 @@ def test_program(name):
         tags = ["notidy"],
         linkstatic = False,
     )
+
+    # Use cc_shared_library to create a shared library in a consistent naming across
+    # platforms.
+    cc_shared_library(
+        name = name,
+        shared_lib_name = "lib{}.so".format(name),
+        deps = [_name],
+    )

test/extensions/dynamic_modules/test_data/rust/test_data.bzl

@@ -1,31 +1,35 @@
+load("@bazel_skylib//rules:copy_file.bzl", "copy_file")
 load("@rules_rust//rust:defs.bzl", "rust_clippy", "rust_shared_library", "rust_test", "rustfmt_test")
 
 def test_program(name):
     srcs = [name + ".rs"]
     if name + "_test.rs" in native.glob(["*.rs"]):
         srcs = srcs + [name + "_test.rs"]
 
+    _name = "_" + name
     rust_shared_library(
-        name = name,
+        name = _name,
         srcs = srcs,
         edition = "2021",
+        crate_root = name + ".rs",
         deps = [
             "//source/extensions/dynamic_modules/sdk/rust:envoy_proxy_dynamic_modules_rust_sdk",
         ],
+        rustc_flags = ["-C", "link-args=-Wl,-undefined,dynamic_lookup"],
     )
 
     # As per the discussion in https://github.com/envoyproxy/envoy/pull/35627,
     # we set the rust_fmt and clippy target here instead of the part of //tools/code_format target for now.
     rustfmt_test(
         name = "fmt_" + name,
         tags = ["nocoverage"],
-        targets = [":" + name],
+        targets = [":" + _name],
         testonly = True,
     )
     rust_clippy(
         name = "clippy_" + name,
         tags = ["nocoverage"],
-        deps = [":" + name],
+        deps = [":" + _name],
         testonly = True,
     )
 
@@ -50,3 +54,11 @@ def test_program(name):
             "nocoverage",
         ],
     )
+
+    # Copy the shared library to the expected name especially for MacOS which
+    # defaults to lib<name>.dylib.
+    copy_file(
+        name = name,
+        src = _name,
+        out = "lib{}.so".format(name),
+    )