[vm] Include version information in DW_AT_producer.

This follows gcc and clang's behavior.

TEST=readelf
Change-Id: Ic009d9439d1e233afda035d0dfd2592c590c0ce2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/387821
Reviewed-by: Tess Strickland <[email protected]>
Commit-Queue: Ryan Macnak <[email protected]>

Author: rmacnak-google

runtime/vm/dwarf.cc

@@ -9,6 +9,7 @@
 #include "vm/elf.h"
 #include "vm/image_snapshot.h"
 #include "vm/object_store.h"
+#include "vm/version.h"
 
 namespace dart {
 
@@ -277,8 +278,9 @@ void Dwarf::WriteDebugInfo(DwarfWriteStream* stream) {
         zone_, IsolateGroup::Current()->object_store()->root_library());
     const String& root_uri = String::Handle(zone_, root_library.url());
     stream->string(root_uri.ToCString());  // DW_AT_name
-    stream->string("Dart VM");             // DW_AT_producer
-    stream->string("");                    // DW_AT_comp_dir
+    const char* producer = zone_->PrintToString("Dart %s\n", Version::String());
+    stream->string(producer);  // DW_AT_producer
+    stream->string("");        // DW_AT_comp_dir
 
     // DW_AT_low_pc
     // The lowest instruction address in this object file that is part of our

runtime/vm/image_snapshot.cc

@@ -1029,8 +1029,22 @@ class DwarfAssemblyStream : public DwarfWriteStream {
   void u8(uint64_t value) {
     stream_->Printf("%s %" Pu64 "\n", kSizeDirectives[kInt64SizeLog2], value);
   }
-  void string(const char* cstr) {               // NOLINT
-    stream_->Printf(".string \"%s\"\n", cstr);  // NOLINT
+  void string(const char* cstr) {        // NOLINT
+    stream_->WriteString(".string \"");  // NOLINT
+    while (char c = *cstr++) {
+      if (c == '"') {
+        stream_->WriteString("\\\"");
+      } else if (c == '\\') {
+        stream_->WriteString("\\\\");
+      } else if (c == '\n') {
+        stream_->WriteString("\\n");
+      } else if (c == '\r') {
+        stream_->WriteString("\\r");
+      } else {
+        stream_->WriteByte(c);
+      }
+    }
+    stream_->WriteString("\"\n");
   }
   void WritePrefixedLength(const char* prefix, std::function<void()> body) {
     ASSERT(prefix != nullptr);