Merge #2276: [Core] Locked memory manager

1c04a35 [Trivial] Use C++11 nulltpr instead of NULL macro in allocators files (random-zebra)
68a3f8f bench: Add benchmark for lockedpool allocation/deallocation (Wladimir J. van der Laan)
cd34088 rpc: Add `getmemoryinfo` call (Wladimir J. van der Laan)
2d2e331 support: Add LockedPool (Wladimir J. van der Laan)
6ca6470 allocators: split allocators and pagelocker (random-zebra)

Pull request description:

  First commit adapts btc d7d187e.
  Then backport the last 3 commits of bitcoin#8753, which were left out in #1488.

ACKs for top commit:
  Fuzzbawls:
    ACK 1c04a35
  furszy:
    ACK 1c04a35 .

Tree-SHA512: 9ee1100df3648a73e1fcd9b98f7fb793d3eb342ad239d3d4f9b2dd32dc0bacfdb29825e84e4e2ba4e621aedb0a62ae66dfba4d76a435b77dd5e2af1a01541890

Author: furszy

CMakeLists.txt

@@ -374,7 +374,6 @@ target_include_directories(ZEROCOIN_A PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
 set(COMMON_SOURCES
-        ./src/allocators.cpp
         ./src/base58.cpp
         ./src/bip38.cpp
         ./src/consensus/params.cpp
@@ -421,7 +420,6 @@ target_include_directories(COMMON_A PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
 set(UTIL_SOURCES
-        ./src/allocators.cpp
         ./src/compat/strnlen.cpp
         ./src/compat/glibc_sanity.cpp
         ./src/compat/glibcxx_sanity.cpp
@@ -441,6 +439,7 @@ set(UTIL_SOURCES
         ./src/utilstrencodings.cpp
         ./src/utilmoneystr.cpp
         ./src/utiltime.cpp
+        ./src/support/lockedpool.cpp
         ./src/support/cleanse.cpp
         )
 add_library(UTIL_A STATIC ${BitcoinHeaders} ${UTIL_SOURCES})

src/Makefile.am

@@ -148,7 +148,6 @@ BITCOIN_CORE_H = \
   activemasternode.h \
   addrdb.h \
   addrman.h \
-  allocators.h \
   arith_uint256.h \
   amount.h \
   base58.h \
@@ -260,7 +259,10 @@ BITCOIN_CORE_H = \
   stakeinput.h \
   script/ismine.h \
   streams.h \
+  support/allocators/secure.h \
+  support/allocators/zeroafterfree.h \
   support/cleanse.h \
+  support/lockedpool.h \
   sync.h \
   threadsafety.h \
   threadinterrupt.h \
@@ -485,7 +487,6 @@ endif
 libbitcoin_common_a_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
 libbitcoin_common_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 libbitcoin_common_a_SOURCES = \
-  allocators.cpp \
   base58.cpp \
   bip38.cpp \
   chainparams.cpp \
@@ -526,7 +527,6 @@ libbitcoin_util_a_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
 libbitcoin_util_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 libbitcoin_util_a_SOURCES = \
   arith_uint256.cpp \
-  allocators.cpp \
   chainparamsbase.cpp \
   clientversion.cpp \
   compat/glibc_sanity.cpp \
@@ -538,6 +538,7 @@ libbitcoin_util_a_SOURCES = \
   random.cpp \
   rpc/protocol.cpp \
   support/cleanse.cpp \
+  support/lockedpool.cpp \
   sync.cpp \
   threadinterrupt.cpp \
   uint256.cpp \
@@ -670,7 +671,6 @@ if BUILD_BITCOIN_LIBS
 include_HEADERS = script/bitcoinconsensus.h
 libbitcoinconsensus_la_SOURCES = \
   arith_uint256.cpp \
-  allocators.cpp \
   primitives/transaction.cpp \
   crypto/hmac_sha512.cpp \
   crypto/scrypt.cpp \

src/Makefile.bench.include

@@ -11,11 +11,12 @@ bench_bench_pivx_SOURCES = \
   bench/bench_pivx.cpp \
   bench/bench.cpp \
   bench/bench.h \
-  bench/checkblock.cpp \
   bench/Examples.cpp \
   bench/base58.cpp \
+  bench/checkblock.cpp \
   bench/checkqueue.cpp \
   bench/crypto_hash.cpp \
+  bench/lockedpool.cpp \
   bench/perf.cpp \
   bench/perf.h \
   bench/prevector.cpp