1. 31 May, 2017 1 commit
    • neis's avatar
      [compiler] Delay allocation of code-embedded heap numbers. · 659e8f7b
      neis authored
      Instead of allocating and embedding certain heap numbers into the code
      during code assembly, emit dummies but record the allocation requests.
      Later then, in Assembler::GetCode, allocate the heap numbers and patch
      the code by replacing the dummies with the actual objects. The
      RelocInfos for the embedded objects are already recorded correctly when
      emitting the dummies.
      
      R=jarin@chromium.org
      BUG=v8:6048
      
      Review-Url: https://codereview.chromium.org/2900683002
      Cr-Commit-Position: refs/heads/master@{#45635}
      659e8f7b
  2. 15 Mar, 2017 1 commit
  3. 28 Feb, 2017 1 commit
  4. 18 Jan, 2017 1 commit
    • binji's avatar
      Implement ldrex/strex instructions in ARM simulator · 66ae5f7d
      binji authored
      This CL implements ldrex, ldrexb, ldrexh, strex, strexb, and strexh in the
      Simulator. These instructions provide "exclusive" access, which provides mutual
      exclusion for concurrent threads of execution.
      
      The ARM specification gives some leeway to implementors, but essentially
      describes each processor as having Local Monitor and Global Monitor. The Local
      Monitor is used to check the exclusivity state without having to synchronize
      with other processors. The Global Monitor is shared between processors. We
      model both to make it easier to match behavior with the spec.
      
      When running with multiple OS threads, each thread has its own isolate, and
      each isolate has its own Simulator. The Local Monitor is stored directly on the
      Simulator, and the Global Monitor is stored as a lazy singleton. The Global
      Monitor maintains a linked-list of all Simulators.
      
      All loads/stores (even non-exclusive) are guarded by the Global Monitor's mutex.
      
      BUG=v8:4614
      
      Review-Url: https://codereview.chromium.org/2006183004
      Cr-Commit-Position: refs/heads/master@{#42481}
      66ae5f7d