Embed support object file generated from C instead of hand assembled …

…code

Makefile

@@ -0,0 +1,6 @@
+update-fixture: Sources/WasmTransformer/Transformers/StackOverflowSanitizer+Fixtures.swift
+
+Fixtures/build/stack_sanitizer_support.o:
+	$(MAKE) -C Fixtures build/stack_sanitizer_support.o
+Sources/WasmTransformer/Transformers/StackOverflowSanitizer+Fixtures.swift: Fixtures/build/stack_sanitizer_support.o Tools/GenerateStackOverflowSanitizerSupport.swift
+	swift ./Tools/GenerateStackOverflowSanitizerSupport.swift Fixtures/build/stack_sanitizer_support.o > Sources/WasmTransformer/Transformers/StackOverflowSanitizer+Fixtures.swift

Sources/WasmTransformer/Transformers/StackOverflowSanitizer+Fixtures.swift

@@ -0,0 +1,7 @@
+// GENERATED FROM Tools/GenerateStackOverflowSanitizerSupport.swift
+
+extension StackOverflowSanitizer {
+    public static let supportObjectFile: [UInt8] = [
+        0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x01, 0x84, 0x80, 0x80, 0x80, 0x00, 0x01, 0x60, 0x00, 0x00, 0x02, 0xc2, 0x80, 0x80, 0x80, 0x00, 0x02, 0x03, 0x65, 0x6e, 0x76, 0x0f, 0x5f, 0x5f, 0x6c, 0x69, 0x6e, 0x65, 0x61, 0x72, 0x5f, 0x6d, 0x65, 0x6d, 0x6f, 0x72, 0x79, 0x02, 0x00, 0x00, 0x11, 0x5f, 0x5f, 0x73, 0x74, 0x61, 0x63, 0x6b, 0x5f, 0x73, 0x61, 0x6e, 0x69, 0x74, 0x69, 0x7a, 0x65, 0x72, 0x15, 0x72, 0x65, 0x70, 0x6f, 0x72, 0x74, 0x5f, 0x73, 0x74, 0x61, 0x63, 0x6b, 0x5f, 0x6f, 0x76, 0x65, 0x72, 0x66, 0x6c, 0x6f, 0x77, 0x00, 0x00, 0x03, 0x82, 0x80, 0x80, 0x80, 0x00, 0x01, 0x00, 0x0a, 0x8b, 0x80, 0x80, 0x80, 0x00, 0x01, 0x09, 0x00, 0x10, 0x80, 0x80, 0x80, 0x80, 0x00, 0x0f, 0x0b, 0x00, 0xc6, 0x80, 0x80, 0x80, 0x00, 0x07, 0x6c, 0x69, 0x6e, 0x6b, 0x69, 0x6e, 0x67, 0x02, 0x08, 0xb7, 0x80, 0x80, 0x80, 0x00, 0x02, 0x00, 0x04, 0x01, 0x07, 0x5f, 0x5f, 0x64, 0x75, 0x6d, 0x6d, 0x79, 0x00, 0x50, 0x00, 0x27, 0x5f, 0x5f, 0x73, 0x74, 0x61, 0x63, 0x6b, 0x5f, 0x73, 0x61, 0x6e, 0x69, 0x74, 0x69, 0x7a, 0x65, 0x72, 0x5f, 0x72, 0x65, 0x70, 0x6f, 0x72, 0x74, 0x5f, 0x73, 0x74, 0x61, 0x63, 0x6b, 0x5f, 0x6f, 0x76, 0x65, 0x72, 0x66, 0x6c, 0x6f, 0x77, 0x00, 0x90, 0x80, 0x80, 0x80, 0x00, 0x0a, 0x72, 0x65, 0x6c, 0x6f, 0x63, 0x2e, 0x43, 0x4f, 0x44, 0x45, 0x03, 0x01, 0x00, 0x04, 0x01, 0x00, 0x89, 0x81, 0x80, 0x80, 0x00, 0x09, 0x70, 0x72, 0x6f, 0x64, 0x75, 0x63, 0x65, 0x72, 0x73, 0x01, 0x0c, 0x70, 0x72, 0x6f, 0x63, 0x65, 0x73, 0x73, 0x65, 0x64, 0x2d, 0x62, 0x79, 0x01, 0x0f, 0x53, 0x77, 0x69, 0x66, 0x74, 0x57, 0x61, 0x73, 0x6d, 0x20, 0x63, 0x6c, 0x61, 0x6e, 0x67, 0x5f, 0x31, 0x30, 0x2e, 0x30, 0x2e, 0x30, 0x20, 0x28, 0x68, 0x74, 0x74, 0x70, 0x73, 0x3a, 0x2f, 0x2f, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x73, 0x77, 0x69, 0x66, 0x74, 0x77, 0x61, 0x73, 0x6d, 0x2f, 0x6c, 0x6c, 0x76, 0x6d, 0x2d, 0x70, 0x72, 0x6f, 0x6a, 0x65, 0x63, 0x74, 0x2e, 0x67, 0x69, 0x74, 0x20, 0x31, 0x36, 0x35, 0x64, 0x38, 0x61, 0x62, 0x32, 0x64, 0x31, 0x39, 0x62, 0x65, 0x63, 0x63, 0x30, 0x64, 0x39, 0x61, 0x39, 0x63, 0x62, 0x33, 0x31, 0x39, 0x32, 0x39, 0x65, 0x30, 0x39, 0x36, 0x63, 0x38, 0x30, 0x36, 0x37, 0x34, 0x36, 0x65, 0x38, 0x29
+    ]
+}

Sources/WasmTransformer/Transformers/StackOverflowSanitizer.swift

@@ -10,44 +10,6 @@ public struct StackOverflowSanitizer {
 
     public init() {}
 
-    /// This hardcoded byte array is produced from the following wat file with hand-assembled "linking" section.
-    /// The dummy function is defined to avoid unused-import elimination.
-    /// This object file is required to embed the import entry and the entry will be used while assertion.
-    /// ```
-    /// (module
-    ///   (type (;0;) (func (param i32) (result i32)))
-    ///   (type (;1;) (func))
-    ///   (import "__stack_sanitizer" "report_stack_overflow" (func (;0;) (type 0)))
-    ///   (func (;1;) (type 1)
-    ///     i32.const 0
-    ///     call 0
-    ///     return))
-    /// ```
-    public static let supportObjectFile: [UInt8] = [
-        // magic
-        0x00, 0x61, 0x73, 0x6d,
-        // version
-        0x01, 0x00, 0x00, 0x00,
-        // type section
-        0x01, 0x04, 0x01, 0x60, 0x00, 0x00,
-        // import section
-        0x02, 0x2b, 0x01, 0x11, 0x5f, 0x5f, 0x73, 0x74, 0x61, 0x63, 0x6b, 0x5f, 0x73, 0x61, 0x6e, 0x69,
-        0x74, 0x69, 0x7a, 0x65, 0x72, 0x15, 0x72, 0x65, 0x70, 0x6f, 0x72, 0x74, 0x5f, 0x73, 0x74, 0x61,
-        0x63, 0x6b, 0x5f, 0x6f, 0x76, 0x65, 0x72, 0x66, 0x6c, 0x6f, 0x77, 0x00, 0x00,
-        // function section
-        0x03, 0x02, 0x01, 0x00,
-        // code section
-        0x0a, 0x09, 0x01, 0x07, 0x00, 0x41, 0x00, 0x10, 0x00, 0x0f, 0x0b,
-        // Custom Section "linking"
-        0x00, 0x37, 0x07, 0x6c, 0x69, 0x6e, 0x6b, 0x69, 0x6e, 0x67, 0x02,
-        // symbol table
-        0x08, 0x2c, 0x01, 0x00, 0x50, 0x00,
-        0x27, 0x5f, 0x5f, 0x73, 0x74, 0x61, 0x63, 0x6b, 0x5f, 0x73, 0x61, 0x6e, 0x69, 0x74,
-        0x69, 0x7a, 0x65, 0x72,
-        0x5f, 0x72, 0x65, 0x70, 0x6f, 0x72, 0x74, 0x5f, 0x73, 0x74, 0x61, 0x63, 0x6b, 0x5f, 0x6f, 0x76,
-        0x65, 0x72, 0x66, 0x6c, 0x6f, 0x77,
-    ]
-
     public func transform<Writer: OutputWriter>(_ input: inout InputByteStream, writer: inout Writer) throws {
         let version = try input.readHeader()
         try writer.writeBytes(magic)

Tools/GenerateStackOverflowSanitizerSupport.swift

@@ -0,0 +1,20 @@
+import Foundation
+
+guard CommandLine.arguments.count == 2 else {
+    print("Usage: \(CommandLine.arguments[0]) <support.o>")
+    exit(1)
+}
+
+let objectFile = try Data(contentsOf: URL(fileURLWithPath: CommandLine.arguments[1]))
+
+let sourceCode = """
+// GENERATED FROM Tools/GenerateStackOverflowSanitizerSupport.swift
+
+extension StackOverflowSanitizer {
+    public static let supportObjectFile: [UInt8] = [
+        \(objectFile.map { String(format: "0x%02x", $0) }.joined(separator: ", "))
+    ]
+}
+"""
+
+print(sourceCode)