aot snapshot file is being held/locked by dart_precompiled_runtime on Windows for duration of dart program execution

[aam]

sdk/runtime/bin/elf_loader.cc

Line 152 in 18c0a39

return new FileMappable(File::Open(/*namespc=*/nullptr, path, File::kRead));

is kept
as part of Mappable

sdk/runtime/bin/elf_loader.cc

Line 595 in 18c0a39

std::unique_ptr<Mappable> mappable(Mappable::FromPath(filename));

, LoadedElf

sdk/runtime/bin/elf_loader.cc

Line 610 in 18c0a39

return reinterpret_cast<Dart_LoadedElf*>(elf.release());

that is kept in

sdk/runtime/bin/main_impl.cc

Line 1211 in 18c0a39

AppSnapshot* app_snapshot = nullptr;

global for duration of program execution

cc @rmacnak-google

[aam]

The change below seems to fix the problem:

diff --git a/runtime/bin/elf_loader.cc b/runtime/bin/elf_loader.cc
index ff44319e339..70baa9c142a 100644
--- a/runtime/bin/elf_loader.cc
+++ b/runtime/bin/elf_loader.cc
@@ -289,6 +289,8 @@ bool LoadedElf::Load() {
   CHECK(ReadSectionStringTable());
   CHECK(ReadSections());

+  mappable_.reset();
+
   return true;
 }