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Fix deallocate for working on old compiers

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Zink Pavel 2023-04-04 23:10:29 +07:00 committed by Pavel Zink
parent 69098a18b9
commit 2636159062
2 changed files with 16 additions and 1 deletions
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6
CMakeLists.txt
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@ -103,6 +103,12 @@ if(CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin" CACHE PATH "Executable/dll output dir.") set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin" CACHE PATH "Executable/dll output dir.")
endif() endif()
include(CheckFunctionExists)
check_function_exists(memset_s HAVE_MEMSET_S)
if(HAVE_MEMSET_S)
add_definitions("-DHAVE_MEMSET_S=1")
endif()
set(JSONCPP_USE_SECURE_MEMORY "0" CACHE STRING "-D...=1 to use memory-wiping allocator for STL") set(JSONCPP_USE_SECURE_MEMORY "0" CACHE STRING "-D...=1 to use memory-wiping allocator for STL")
configure_file("${PROJECT_SOURCE_DIR}/version.in" configure_file("${PROJECT_SOURCE_DIR}/version.in"

11
include/json/allocator.h
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@ -6,6 +6,7 @@
#ifndef JSON_ALLOCATOR_H_INCLUDED #ifndef JSON_ALLOCATOR_H_INCLUDED
#define JSON_ALLOCATOR_H_INCLUDED #define JSON_ALLOCATOR_H_INCLUDED
#include <algorithm>
#include <cstring> #include <cstring>
#include <memory> #include <memory>
@ -38,8 +39,16 @@ public:
* The memory block is filled with zeroes before being released. * The memory block is filled with zeroes before being released.
*/ */
void deallocate(pointer p, size_type n) { void deallocate(pointer p, size_type n) {
// memset_s is used because memset may be optimized away by the compiler // These constructs will not be removed by the compiler during optimization,
// unlike memset.
#if defined(HAVE_MEMSET_S)
memset_s(p, n * sizeof(T), 0, n * sizeof(T)); memset_s(p, n * sizeof(T), 0, n * sizeof(T));
#elif defined(_WIN32)
RtlSecureZeroMemory(p, n * sizeof(T));
#else
std::fill_n(reinterpret_cast<volatile unsigned char*>(p), n, 0);
#endif
// free using "global operator delete" // free using "global operator delete"
::operator delete(p); ::operator delete(p);
} }