Vyacheslav Egorov
c111f693c7
Freelist implementation was trying to mark pages executable (RX) which does not respect possibility that it is working with RW mapping which can't be directly marked as executable. It needed to use RO permission instead if dual mapping is enabled. This CL consolidates all code mentioning RX permission in one place: VirtualMemory::WriteProtectCode so that we avoid this mistake in the future. R=kustermann@google.com TEST=tested by doing large reloads which cause more churn in code space Change-Id: If99692cac3ce3ff54b907e4c43d7f26bae7439ff Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/435860 Commit-Queue: Martin Kustermann <kustermann@google.com> Auto-Submit: Slava Egorov <vegorov@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com>
Dart VM Compilation Pipeline
This folder contains Dart VM compilation pipeline.
Compilation pipeline is mainly responsible for converting AST or Kernel AST into IL flow graphs and then generating native code from IL.
It has the following structure:
| Directory | What goes there |
|---|---|
assembler/ |
Assemblers and disassemblers |
backend/ |
IL based compilation backend: optimization passes and architecture specific code generation rules |
frontend/ |
Frontends responsible for converting AST into IL |
jit/ |
JIT specific passes and compilation pipeline entry points |
aot/ |
AOT specific passes and compilation pipeline entry points |
. |
Shared code or code without clear designation. |
Currently there are no layering restrictions and components from different subfolders can reference each other.