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- 45b4111d940009bc7b3ebf621c9cb9293c60344a Use copied value i in lambda by Abseil Team <absl-team@google.com>

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- b726b3102f8439b8480b6ff52fc3660162fa0bd9 Fix MSVC compiler warning on 32-bit platforms (GitHub iss... by Derek Mauro <dmauro@google.com>
  - a8a29e636c85bd7d82c0cbc824a1c2e498764337 Explicitly forbid to specify the template parameter to Wr... by Abseil Team <absl-team@google.com>
  - 566a1d903266fdbfdcf758401c356a0c6703422d Add missing license header to BUILD file. by Alex Strelnikov <strel@google.com>
  - ef1c0642cde0bbad62bbb30715256b232a4ab817 Fix BUILD file header. by Alex Strelnikov <strel@google.com>
  - b6e2cf00f808ee32b9eb7b3226af79d628742c20 Release GraphCycles microbenchmark. by Alex Strelnikov <strel@google.com>
  - f592d78f549e7a242bf2bb4858a26645a655eac3 Release Mutex microbenchmarks. by Alex Strelnikov <strel@google.com>

GitOrigin-RevId: 45b4111d940009bc7b3ebf621c9cb9293c60344a
Change-Id: I82885ae176952a764574c6d4616e312a977407b2
This commit is contained in:
Abseil Team 2018-05-22 16:34:47 -07:00 • committed by katzdm
parent 3e671c7821
commit 014f02a3ec
11 changed files with 255 additions and 35 deletions
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19
absl/synchronization/mutex.cc
View file

@ -43,6 +43,7 @@
#include "absl/base/dynamic_annotations.h"
#include "absl/base/internal/atomic_hook.h"
#include "absl/base/internal/cycleclock.h"
#include "absl/base/internal/hide_ptr.h"
#include "absl/base/internal/low_level_alloc.h"
#include "absl/base/internal/raw_logging.h"
#include "absl/base/internal/spinlock.h"
@ -272,13 +273,6 @@ static absl::base_internal::SpinLock synch_event_mu(
// Can't be too small, as it's used for deadlock detection information.
static const uint32_t kNSynchEvent = 1031;
// We need to hide Mutexes (or other deadlock detection's pointers)
// from the leak detector.
static const uintptr_t kHideMask = static_cast<uintptr_t>(0xF03A5F7BF03A5F7BLL);
static uintptr_t MaskMu(const void *mu) {
return reinterpret_cast<uintptr_t>(mu) ^ kHideMask;
}
static struct SynchEvent { // this is a trivial hash table for the events
// struct is freed when refcount reaches 0
int refcount GUARDED_BY(synch_event_mu);
@ -314,7 +308,8 @@ static SynchEvent *EnsureSynchEvent(std::atomic<intptr_t> *addr,
SynchEvent *e;
// first look for existing SynchEvent struct..
synch_event_mu.Lock();
for (e = synch_event[h]; e != nullptr && e->masked_addr != MaskMu(addr);
for (e = synch_event[h];
e != nullptr && e->masked_addr != base_internal::HidePtr(addr);
e = e->next) {
}
if (e == nullptr) { // no SynchEvent struct found; make one.
@ -325,7 +320,7 @@ static SynchEvent *EnsureSynchEvent(std::atomic<intptr_t> *addr,
e = reinterpret_cast<SynchEvent *>(
base_internal::LowLevelAlloc::Alloc(sizeof(*e) + l));
e->refcount = 2; // one for return value, one for linked list
e->masked_addr = MaskMu(addr);
e->masked_addr = base_internal::HidePtr(addr);
e->invariant = nullptr;
e->arg = nullptr;
e->log = false;
@ -367,7 +362,8 @@ static void ForgetSynchEvent(std::atomic<intptr_t> *addr, intptr_t bits,
SynchEvent *e;
synch_event_mu.Lock();
for (pe = &synch_event[h];
(e = *pe) != nullptr && e->masked_addr != MaskMu(addr); pe = &e->next) {
(e = *pe) != nullptr && e->masked_addr != base_internal::HidePtr(addr);
pe = &e->next) {
}
bool del = false;
if (e != nullptr) {
@ -388,7 +384,8 @@ static SynchEvent *GetSynchEvent(const void *addr) {
uint32_t h = reinterpret_cast<intptr_t>(addr) % kNSynchEvent;
SynchEvent *e;
synch_event_mu.Lock();
for (e = synch_event[h]; e != nullptr && e->masked_addr != MaskMu(addr);
for (e = synch_event[h];
e != nullptr && e->masked_addr != base_internal::HidePtr(addr);
e = e->next) {
}
if (e != nullptr) {