libsanitizer/tsan/tsan_rtl_proc.cpp

   1 //===-- tsan_rtl_proc.cpp -----------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file is a part of ThreadSanitizer (TSan), a race detector.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "sanitizer_common/sanitizer_placement_new.h"
  14 #include "tsan_rtl.h"
  15 #include "tsan_mman.h"
  16 #include "tsan_flags.h"
  17
  18 namespace __tsan {
  19
  20 Processor *ProcCreate() {
  21   void *mem = InternalAlloc(sizeof(Processor));
  22   internal_memset(mem, 0, sizeof(Processor));
  23   Processor *proc = new(mem) Processor;
  24   proc->thr = nullptr;
  25 #if !SANITIZER_GO
  26   AllocatorProcStart(proc);
  27 #endif
  28   if (common_flags()->detect_deadlocks)
  29     proc->dd_pt = ctx->dd->CreatePhysicalThread();
  30   return proc;
  31 }
  32
  33 void ProcDestroy(Processor *proc) {
  34   CHECK_EQ(proc->thr, nullptr);
  35 #if !SANITIZER_GO
  36   AllocatorProcFinish(proc);
  37 #endif
  38   ctx->clock_alloc.FlushCache(&proc->clock_cache);
  39   ctx->metamap.OnProcIdle(proc);
  40   if (common_flags()->detect_deadlocks)
  41      ctx->dd->DestroyPhysicalThread(proc->dd_pt);
  42   proc->~Processor();
  43   InternalFree(proc);
  44 }
  45
  46 void ProcWire(Processor *proc, ThreadState *thr) {
  47   CHECK_EQ(thr->proc1, nullptr);
  48   CHECK_EQ(proc->thr, nullptr);
  49   thr->proc1 = proc;
  50   proc->thr = thr;
  51 }
  52
  53 void ProcUnwire(Processor *proc, ThreadState *thr) {
  54   CHECK_EQ(thr->proc1, proc);
  55   CHECK_EQ(proc->thr, thr);
  56   thr->proc1 = nullptr;
  57   proc->thr = nullptr;
  58 }
  59
  60 }  // namespace __tsan