Export of internal Abseil changes

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587e6db882749fa7faa12815e614afab04d218b9 by Derek Mauro <dmauro@google.com>:

Use attribute detection for other sanitizer related attributes

PiperOrigin-RevId: 324077073

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3ee55e4935b4235516b1fcac3c55945e510f7afc by Evan Brown <ezb@google.com>:

Simplify CordRepExternal allocation/deallocation.

I think this can save some memory when `Releaser` is empty and when on platforms where alignof(CordRepExternal) < (default `::operator new` alignment).

We no longer need the API requirement that alignof(Releaser) <= (default `::operator new` alignment).

Also remove another static_assert from a TODO in cord_internal.h and fix some warnings about calling std::move on a forwarding reference.

PiperOrigin-RevId: 324053720

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9fc78436565eb3b204d4aa425ee3773354392f45 by Derek Mauro <dmauro@google.com>:

Use auto-detected sanitizer attributes for ASAN, MSAN, and TSAN builds

PiperOrigin-RevId: 323831461
GitOrigin-RevId: 587e6db882749fa7faa12815e614afab04d218b9
Change-Id: Ie0e4a2846d7f66988a2d81a5e50721b62fdb3d6d

1 files changed, 13 insertions, 12 deletions

diff --git a/absl/container/internal/container_memory.h b/absl/container/internal/container_memory.h
index 92a61cc..c7777a9 100644
--- a/absl/container/internal/container_memory.h
+++ b/absl/container/internal/container_memory.h
@@ -15,14 +15,6 @@
 #ifndef ABSL_CONTAINER_INTERNAL_CONTAINER_MEMORY_H_
 #define ABSL_CONTAINER_INTERNAL_CONTAINER_MEMORY_H_
 
-#ifdef ADDRESS_SANITIZER
-#include <sanitizer/asan_interface.h>
-#endif
-
-#ifdef MEMORY_SANITIZER
-#include <sanitizer/msan_interface.h>
-#endif
-
 #include <cassert>
 #include <cstddef>
 #include <memory>
@@ -30,10 +22,19 @@
 #include <type_traits>
 #include <utility>
 
+#include "absl/base/config.h"
 #include "absl/memory/memory.h"
 #include "absl/meta/type_traits.h"
 #include "absl/utility/utility.h"
 
+#ifdef ABSL_HAVE_ADDRESS_SANITIZER
+#include <sanitizer/asan_interface.h>
+#endif
+
+#ifdef ABSL_HAVE_MEMORY_SANITIZER
+#include <sanitizer/msan_interface.h>
+#endif
+
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace container_internal {
@@ -209,10 +210,10 @@ DecomposeValue(F&& f, Arg&& arg) {
 
 // Helper functions for asan and msan.
 inline void SanitizerPoisonMemoryRegion(const void* m, size_t s) {
-#ifdef ADDRESS_SANITIZER
+#ifdef ABSL_HAVE_ADDRESS_SANITIZER
   ASAN_POISON_MEMORY_REGION(m, s);
 #endif
-#ifdef MEMORY_SANITIZER
+#ifdef ABSL_HAVE_MEMORY_SANITIZER
   __msan_poison(m, s);
 #endif
   (void)m;
@@ -220,10 +221,10 @@ inline void SanitizerPoisonMemoryRegion(const void* m, size_t s) {
 }
 
 inline void SanitizerUnpoisonMemoryRegion(const void* m, size_t s) {
-#ifdef ADDRESS_SANITIZER
+#ifdef ABSL_HAVE_ADDRESS_SANITIZER
   ASAN_UNPOISON_MEMORY_REGION(m, s);
 #endif
-#ifdef MEMORY_SANITIZER
+#ifdef ABSL_HAVE_MEMORY_SANITIZER
   __msan_unpoison(m, s);
 #endif
   (void)m;