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This commit is contained in:
Daan Leijen 2024-12-20 13:01:00 -08:00
commit f6408235f7
21 changed files with 653 additions and 77 deletions
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26
CMakeLists.txt
View file

@ -89,6 +89,11 @@ if (NOT CMAKE_BUILD_TYPE)
endif()
endif()
if (CMAKE_GENERATOR MATCHES "^Visual Studio.*$")
message(STATUS "Note: when building with Visual Studio the build type is specified when building.")
message(STATUS "For example: 'cmake --build . --config=Release")
endif()
if("${CMAKE_BINARY_DIR}" MATCHES ".*(S|s)ecure$")
message(STATUS "Default to secure build")
set(MI_SECURE "ON")
@ -327,11 +332,11 @@ set(MI_OPT_ARCH_FLAGS "")
set(MI_ARCH "unknown")
if(CMAKE_SYSTEM_PROCESSOR MATCHES "^(x86|i[3456]86)$" OR CMAKE_GENERATOR_PLATFORM MATCHES "^(x86|Win32)$")
set(MI_ARCH "x86")
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(x86_64|x64|amd64|AMD64)$" OR CMAKE_GENERATOR_PLATFORM STREQUAL "x64")
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(x86_64|x64|amd64|AMD64)$" OR CMAKE_GENERATOR_PLATFORM STREQUAL "x64") # must be before arm64
set(MI_ARCH "x64")
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64|arm64|armv8.?)$" OR CMAKE_GENERATOR_PLATFORM STREQUAL "ARM64")
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64|arm64|armv8.?|ARM64)$" OR CMAKE_GENERATOR_PLATFORM STREQUAL "ARM64")
set(MI_ARCH "arm64")
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(arm|armv[34567])$")
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(arm|armv[34567]|ARM)$")
set(MI_ARCH "arm32")
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(riscv|riscv32|riscv64)$")
if(CMAKE_SIZEOF_VOID_P==4)
@ -342,7 +347,7 @@ elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(riscv|riscv32|riscv64)$")
else()
set(MI_ARCH ${CMAKE_SYSTEM_PROCESSOR})
endif()
message(STATUS "Architecture: ${MI_ARCH}")
message(STATUS "Architecture: ${MI_ARCH}") # (${CMAKE_SYSTEM_PROCESSOR}, ${CMAKE_GENERATOR_PLATFORM}, ${CMAKE_GENERATOR})")
# Check /proc/cpuinfo for an SV39 MMU and limit the virtual address bits.
# (this will skip the aligned hinting in that case. Issue #939, #949)
@ -547,8 +552,14 @@ if(MI_BUILD_SHARED)
)
if(WIN32 AND MI_WIN_REDIRECT)
# On windows, link and copy the mimalloc redirection dll too.
if(MI_ARCH STREQUAL "x64")
if(CMAKE_GENERATOR_PLATFORM STREQUAL "arm64ec")
set(MIMALLOC_REDIRECT_SUFFIX "-arm64ec")
elseif(MI_ARCH STREQUAL "x64")
set(MIMALLOC_REDIRECT_SUFFIX "")
if(CMAKE_SYSTEM_PROCESSOR STREQUAL "ARM64")
message(STATUS "Note: x64 code emulated on Windows for arm64 should use an arm64ec build of 'mimalloc-override.dll'")
message(STATUS " with 'mimalloc-redirect-arm64ec.dll'. See the 'bin\\readme.md' for more information.")
endif()
elseif(MI_ARCH STREQUAL "x86")
set(MIMALLOC_REDIRECT_SUFFIX "32")
else()
@ -671,11 +682,6 @@ endif()
if (MI_OVERRIDE)
if (MI_BUILD_SHARED)
target_compile_definitions(mimalloc PRIVATE MI_MALLOC_OVERRIDE)
if (WIN32)
# on windows we should generate mimalloc-override.dll.
# string(REPLACE "mimalloc" "mimalloc-override" mi_override_output_name ${mi_basename})
# set_target_properties(mimalloc PROPERTIES OUTPUT_NAME ${mi_override_output_name})
endif()
endif()
if(NOT WIN32)
# It is only possible to override malloc on Windows when building as a DLL.

BIN
bin/mimalloc-redirect-arm64.dll
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bin/mimalloc-redirect-arm64ec.dll Normal file
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bin/mimalloc-redirect-arm64ec.lib Normal file
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bin/mimalloc-redirect.dll
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bin/mimalloc-redirect.lib
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BIN
bin/mimalloc-redirect32.dll
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bin/mimalloc-redirect32.lib
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BIN
bin/minject-arm64.exe
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bin/minject.exe
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bin/minject32.exe
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78
bin/readme.md
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@ -1,28 +1,30 @@
# Windows Override
<span id="override_on_windows">Dynamically overriding on mimalloc on Windows</span>
is robust and has the particular advantage to be able to redirect all malloc/free calls that go through
the (dynamic) C runtime allocator, including those from other DLL's or libraries.
As it intercepts all allocation calls on a low level, it can be used reliably
is robust and has the particular advantage to be able to redirect all malloc/free calls
that go through the (dynamic) C runtime allocator, including those from other DLL's or
libraries. As it intercepts all allocation calls on a low level, it can be used reliably
on large programs that include other 3rd party components.
There are four requirements to make the overriding work robustly:
There are four requirements to make the overriding work well:
1. Use the C-runtime library as a DLL (using the `/MD` or `/MDd` switch).
2. Link your program explicitly with `mimalloc-override.dll` library.
To ensure the `mimalloc-override.dll` is loaded at run-time it is easiest to insert some
call to the mimalloc API in the `main` function, like `mi_version()`
(or use the `/INCLUDE:mi_version` switch on the linker, or
use `#pragma comment(linker, "/include:mi_version")` in some source file).
See the `mimalloc-override-test` project for an example on how to use this.
2. Link your program explicitly with the `mimalloc.lib` export library for
the `mimalloc.dll` -- which contains all mimalloc functionality.
To ensure the `mimalloc.dll` is actually loaded at run-time it is easiest
to insert some call to the mimalloc API in the `main` function, like `mi_version()`
(or use the `/include:mi_version` switch on the linker, or
similarly, `#pragma comment(linker, "/include:mi_version")` in some source file).
See the `mimalloc-test-override` project for an example on how to use this.
3. The `mimalloc-redirect.dll` (x64) (or `mimalloc-redirect32.dll` (x86), or `mimalloc-redirect-arm64.dll` (arm64)) must be put
in the same folder as the main `mimalloc-override.dll` at runtime (as it is a dependency of that DLL).
The redirection DLL ensures that all calls to the C runtime malloc API get redirected to
mimalloc functions (which reside in `mimalloc-override.dll`).
3. The `mimalloc-redirect.dll` must be put in the same folder as the main
`mimalloc.dll` at runtime (as it is a dependency of that DLL).
The redirection DLL ensures that all calls to the C runtime malloc API get
redirected to mimalloc functions (which reside in `mimalloc.dll`).
4. Ensure the `mimalloc-override.dll` comes as early as possible in the import
4. Ensure the `mimalloc.dll` comes as early as possible in the import
list of the final executable (so it can intercept all potential allocations).
You can use `minject -l <exe>` to check this if needed.
For best performance on Windows with C++, it
is also recommended to also override the `new`/`delete` operations (by including
@ -30,19 +32,42 @@ is also recommended to also override the `new`/`delete` operations (by including
a single(!) source file in your project).
The environment variable `MIMALLOC_DISABLE_REDIRECT=1` can be used to disable dynamic
overriding at run-time. Use `MIMALLOC_VERBOSE=1` to check if mimalloc was successfully redirected.
overriding at run-time. Use `MIMALLOC_VERBOSE=1` to check if mimalloc was successfully
redirected.
## Minject
### Other Platforms
We cannot always re-link an executable with `mimalloc-override.dll`, and similarly, we cannot always
ensure the the DLL comes first in the import table of the final executable.
You always link with `mimalloc.dll` but for different platforms you may
need a specific redirection DLL:
- __x64__: `mimalloc-redirect.dll`.
- __x86__: `mimalloc-redirect32.dll`. Use for older 32-bit Windows programs.
- __arm64__: `mimalloc-redirect-arm64.dll`. Use for native Windows arm64 programs.
- __arm64ec__: `mimalloc-redirect-arm64ec.dll`. The [arm64ec] ABI is "emulation compatible"
mode on Windows arm64. Unfortunately we cannot run x64 code emulated on Windows arm64 with
the x64 mimalloc override directly (since the C runtime always uses `arm64ec`). Instead:
1. Build the program as normal for x64 and link as normal with the x64
`mimalloc.lib` export library.
2. Now separately build `mimalloc.dll` in `arm64ec` mode and _overwrite_ your
previous (x64) `mimalloc.dll` -- the loader can handle the mix of arm64ec
and x64 code. Now use `mimalloc-redirect-arm64ec.dll` to match your new
arm64ec `mimalloc.dll`. The main program stays as is and can be fully x64
or contain more arm64ec modules. At runtime, the arm64ec `mimalloc.dll` will
run with native arm64 instructions while the rest of the program runs emulated x64.
[arm64ec]: https://learn.microsoft.com/en-us/windows/arm/arm64ec
### Minject
We cannot always re-link an executable with `mimalloc.dll`, and similarly, we
cannot always ensure that the DLL comes first in the import table of the final executable.
In many cases though we can patch existing executables without any recompilation
if they are linked with the dynamic C runtime (`ucrtbase.dll`) -- just put the `mimalloc-override.dll`
into the import table (and put `mimalloc-redirect.dll` in the same folder)
Such patching can be done for example with [CFF Explorer](https://ntcore.com/?page_id=388).
if they are linked with the dynamic C runtime (`ucrtbase.dll`) -- just put the
`mimalloc.dll` into the import table (and put `mimalloc-redirect.dll` in the same
directory) Such patching can be done for example with [CFF Explorer](https://ntcore.com/?page_id=388).
The `minject` program can also do this from the command line
(or `minject32` for 32-bit PE files, or `minject-arm64` on arm64 Windows).
Use `minject --help` for options:
```
@ -61,8 +86,8 @@ options:
-l --list only list imported modules
-i --inplace update the exe in-place (make sure there is a backup!)
-f --force always overwrite without prompting
--postfix=<p> use <p> as a postfix to the mimalloc dll (default is 'override')
e.g. use --postfix=override-debug to link with mimalloc-override-debug.dll
--postfix=<p> use <p> as a postfix to the mimalloc dll.
e.g. use --postfix=debug to link with mimalloc-debug.dll
notes:
Without '--inplace' an injected <exe> is generated with the same name ending in '-mi'.
@ -72,3 +97,6 @@ examples:
> minject --list myprogram.exe
> minject --force --inplace myprogram.exe
```
For x86 32-bit binaries, use `minject32`, and for arm64 binaries use `minject-arm64`.

84
ide/vs2022/mimalloc-override-test.vcxproj
View file

@ -5,6 +5,10 @@
<Configuration>Debug</Configuration>
<Platform>ARM64</Platform>
</ProjectConfiguration>
<ProjectConfiguration Include="Debug|ARM64EC">
<Configuration>Debug</Configuration>
<Platform>ARM64EC</Platform>
</ProjectConfiguration>
<ProjectConfiguration Include="Debug|Win32">
<Configuration>Debug</Configuration>
<Platform>Win32</Platform>
@ -13,6 +17,10 @@
<Configuration>Release</Configuration>
<Platform>ARM64</Platform>
</ProjectConfiguration>
<ProjectConfiguration Include="Release|ARM64EC">
<Configuration>Release</Configuration>
<Platform>ARM64EC</Platform>
</ProjectConfiguration>
<ProjectConfiguration Include="Release|Win32">
<Configuration>Release</Configuration>
<Platform>Win32</Platform>
@ -31,7 +39,7 @@
<ProjectGuid>{FEF7868F-750E-4C21-A04D-22707CC66879}</ProjectGuid>
<RootNamespace>mimalloc-override-test</RootNamespace>
<WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
<ProjectName>mimalloc-override-test</ProjectName>
<ProjectName>mimalloc-test-override</ProjectName>
</PropertyGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
@ -55,6 +63,11 @@
<UseDebugLibraries>true</UseDebugLibraries>
<PlatformToolset>v143</PlatformToolset>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64EC'" Label="Configuration">
<ConfigurationType>Application</ConfigurationType>
<UseDebugLibraries>true</UseDebugLibraries>
<PlatformToolset>v143</PlatformToolset>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
<ConfigurationType>Application</ConfigurationType>
<UseDebugLibraries>false</UseDebugLibraries>
@ -67,6 +80,12 @@
<PlatformToolset>v143</PlatformToolset>
<WholeProgramOptimization>true</WholeProgramOptimization>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64EC'" Label="Configuration">
<ConfigurationType>Application</ConfigurationType>
<UseDebugLibraries>false</UseDebugLibraries>
<PlatformToolset>v143</PlatformToolset>
<WholeProgramOptimization>true</WholeProgramOptimization>
</PropertyGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
<ImportGroup Label="ExtensionSettings">
</ImportGroup>
@ -84,12 +103,18 @@
<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'" Label="PropertySheets">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
</ImportGroup>
<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64EC'" Label="PropertySheets">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
</ImportGroup>
<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
</ImportGroup>
<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'" Label="PropertySheets">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
</ImportGroup>
<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64EC'" Label="PropertySheets">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
</ImportGroup>
<PropertyGroup Label="UserMacros" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<OutDir>$(ProjectDir)..\..\out\msvc-$(Platform)\$(Configuration)\</OutDir>
@ -107,6 +132,10 @@
<OutDir>$(ProjectDir)..\..\out\msvc-$(Platform)\$(Configuration)\</OutDir>
<IntDir>$(ProjectDir)..\..\out\msvc-$(Platform)\$(ProjectName)\$(Configuration)\</IntDir>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64EC'">
<OutDir>$(ProjectDir)..\..\out\msvc-$(Platform)\$(Configuration)\</OutDir>
<IntDir>$(ProjectDir)..\..\out\msvc-$(Platform)\$(ProjectName)\$(Configuration)\</IntDir>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
<OutDir>$(ProjectDir)..\..\out\msvc-$(Platform)\$(Configuration)\</OutDir>
<IntDir>$(ProjectDir)..\..\out\msvc-$(Platform)\$(ProjectName)\$(Configuration)\</IntDir>
@ -115,6 +144,10 @@
<OutDir>$(ProjectDir)..\..\out\msvc-$(Platform)\$(Configuration)\</OutDir>
<IntDir>$(ProjectDir)..\..\out\msvc-$(Platform)\$(ProjectName)\$(Configuration)\</IntDir>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64EC'">
<OutDir>$(ProjectDir)..\..\out\msvc-$(Platform)\$(Configuration)\</OutDir>
<IntDir>$(ProjectDir)..\..\out\msvc-$(Platform)\$(ProjectName)\$(Configuration)\</IntDir>
</PropertyGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<ClCompile>
<WarningLevel>Level3</WarningLevel>
@ -185,6 +218,30 @@
</Command>
</PostBuildEvent>
</ItemDefinitionGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64EC'">
<ClCompile>
<WarningLevel>Level3</WarningLevel>
<Optimization>Disabled</Optimization>
<SDLCheck>true</SDLCheck>
<ConformanceMode>true</ConformanceMode>
<AdditionalIncludeDirectories>..\..\include</AdditionalIncludeDirectories>
<RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
<ExceptionHandling>Sync</ExceptionHandling>
<CompileAs>Default</CompileAs>
<SupportJustMyCode>false</SupportJustMyCode>
</ClCompile>
<Link>
<SubSystem>Console</SubSystem>
<EntryPointSymbol>
</EntryPointSymbol>
<AdditionalDependencies>kernel32.lib;%(AdditionalDependencies)</AdditionalDependencies>
</Link>
<PostBuildEvent />
<PostBuildEvent>
<Command>
</Command>
</PostBuildEvent>
</ItemDefinitionGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
<ClCompile>
<WarningLevel>Level3</WarningLevel>
@ -258,6 +315,31 @@
</Command>
</PostBuildEvent>
</ItemDefinitionGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64EC'">
<ClCompile>
<WarningLevel>Level3</WarningLevel>
<Optimization>MaxSpeed</Optimization>
<FunctionLevelLinking>true</FunctionLevelLinking>
<IntrinsicFunctions>true</IntrinsicFunctions>
<SDLCheck>true</SDLCheck>
<ConformanceMode>true</ConformanceMode>
<AdditionalIncludeDirectories>..\..\include</AdditionalIncludeDirectories>
<PreprocessorDefinitions>_MBCS;%(PreprocessorDefinitions);NDEBUG</PreprocessorDefinitions>
<RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
</ClCompile>
<Link>
<EnableCOMDATFolding>true</EnableCOMDATFolding>
<OptimizeReferences>true</OptimizeReferences>
<SubSystem>Console</SubSystem>
<EntryPointSymbol>
</EntryPointSymbol>
<AdditionalDependencies>kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;%(AdditionalDependencies)</AdditionalDependencies>
</Link>
<PostBuildEvent>
<Command>
</Command>
</PostBuildEvent>
</ItemDefinitionGroup>
<ItemGroup>
<ClCompile Include="..\..\test\main-override.cpp" />
</ItemGroup>

121
ide/vs2022/mimalloc-override.vcxproj
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@ -5,6 +5,10 @@
<Configuration>Debug</Configuration>
<Platform>ARM64</Platform>
</ProjectConfiguration>
<ProjectConfiguration Include="Debug|ARM64EC">
<Configuration>Debug</Configuration>
<Platform>ARM64EC</Platform>
</ProjectConfiguration>
<ProjectConfiguration Include="Debug|Win32">
<Configuration>Debug</Configuration>
<Platform>Win32</Platform>
@ -13,6 +17,10 @@
<Configuration>Release</Configuration>
<Platform>ARM64</Platform>
</ProjectConfiguration>
<ProjectConfiguration Include="Release|ARM64EC">
<Configuration>Release</Configuration>
<Platform>ARM64EC</Platform>
</ProjectConfiguration>
<ProjectConfiguration Include="Release|Win32">
<Configuration>Release</Configuration>
<Platform>Win32</Platform>
@ -31,7 +39,7 @@
<ProjectGuid>{ABB5EAE7-B3E6-432E-B636-333449892EA7}</ProjectGuid>
<RootNamespace>mimalloc-override</RootNamespace>
<WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
<ProjectName>mimalloc-override</ProjectName>
<ProjectName>mimalloc-override-dll</ProjectName>
</PropertyGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
@ -54,6 +62,11 @@
<UseDebugLibraries>true</UseDebugLibraries>
<PlatformToolset>v143</PlatformToolset>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64EC'" Label="Configuration">
<ConfigurationType>DynamicLibrary</ConfigurationType>
<UseDebugLibraries>true</UseDebugLibraries>
<PlatformToolset>v143</PlatformToolset>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
<ConfigurationType>DynamicLibrary</ConfigurationType>
<UseDebugLibraries>false</UseDebugLibraries>
@ -64,6 +77,11 @@
<UseDebugLibraries>false</UseDebugLibraries>
<PlatformToolset>v143</PlatformToolset>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64EC'" Label="Configuration">
<ConfigurationType>DynamicLibrary</ConfigurationType>
<UseDebugLibraries>false</UseDebugLibraries>
<PlatformToolset>v143</PlatformToolset>
</PropertyGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
<ImportGroup Label="ExtensionSettings">
</ImportGroup>
@ -81,48 +99,66 @@
<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'" Label="PropertySheets">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
</ImportGroup>
<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64EC'" Label="PropertySheets">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
</ImportGroup>
<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
</ImportGroup>
<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'" Label="PropertySheets">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
</ImportGroup>
<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64EC'" Label="PropertySheets">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
</ImportGroup>
<PropertyGroup Label="UserMacros" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<OutDir>$(SolutionDir)..\..\out\msvc-$(Platform)\$(Configuration)\</OutDir>
<IntDir>$(SolutionDir)..\..\out\msvc-$(Platform)\$(ProjectName)\$(Configuration)\</IntDir>
<TargetExt>.dll</TargetExt>
<TargetName>mimalloc-override</TargetName>
<TargetName>mimalloc</TargetName>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
<OutDir>$(SolutionDir)..\..\out\msvc-$(Platform)\$(Configuration)\</OutDir>
<IntDir>$(SolutionDir)..\..\out\msvc-$(Platform)\$(ProjectName)\$(Configuration)\</IntDir>
<TargetExt>.dll</TargetExt>
<TargetName>mimalloc-override</TargetName>
<TargetName>mimalloc</TargetName>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
<OutDir>$(SolutionDir)..\..\out\msvc-$(Platform)\$(Configuration)\</OutDir>
<IntDir>$(SolutionDir)..\..\out\msvc-$(Platform)\$(ProjectName)\$(Configuration)\</IntDir>
<TargetExt>.dll</TargetExt>
<TargetName>mimalloc-override</TargetName>
<TargetName>mimalloc</TargetName>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
<OutDir>$(SolutionDir)..\..\out\msvc-$(Platform)\$(Configuration)\</OutDir>
<IntDir>$(SolutionDir)..\..\out\msvc-$(Platform)\$(ProjectName)\$(Configuration)\</IntDir>
<TargetExt>.dll</TargetExt>
<TargetName>mimalloc-override</TargetName>
<TargetName>mimalloc</TargetName>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64EC'">
<OutDir>$(SolutionDir)..\..\out\msvc-$(Platform)\$(Configuration)\</OutDir>
<IntDir>$(SolutionDir)..\..\out\msvc-$(Platform)\$(ProjectName)\$(Configuration)\</IntDir>
<TargetExt>.dll</TargetExt>
<TargetName>mimalloc</TargetName>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
<OutDir>$(SolutionDir)..\..\out\msvc-$(Platform)\$(Configuration)\</OutDir>
<IntDir>$(SolutionDir)..\..\out\msvc-$(Platform)\$(ProjectName)\$(Configuration)\</IntDir>
<TargetExt>.dll</TargetExt>
<TargetName>mimalloc-override</TargetName>
<TargetName>mimalloc</TargetName>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
<OutDir>$(SolutionDir)..\..\out\msvc-$(Platform)\$(Configuration)\</OutDir>
<IntDir>$(SolutionDir)..\..\out\msvc-$(Platform)\$(ProjectName)\$(Configuration)\</IntDir>
<TargetExt>.dll</TargetExt>
<TargetName>mimalloc-override</TargetName>
<TargetName>mimalloc</TargetName>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64EC'">
<OutDir>$(SolutionDir)..\..\out\msvc-$(Platform)\$(Configuration)\</OutDir>
<IntDir>$(SolutionDir)..\..\out\msvc-$(Platform)\$(ProjectName)\$(Configuration)\</IntDir>
<TargetExt>.dll</TargetExt>
<TargetName>mimalloc</TargetName>
</PropertyGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<ClCompile>
@ -208,6 +244,34 @@
<Message>copy mimalloc-redirect-arm64.dll to the output directory</Message>
</PostBuildEvent>
</ItemDefinitionGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64EC'">
<ClCompile>
<WarningLevel>Level3</WarningLevel>
<Optimization>Disabled</Optimization>
<SDLCheck>true</SDLCheck>
<ConformanceMode>true</ConformanceMode>
<AdditionalIncludeDirectories>../../include</AdditionalIncludeDirectories>
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78
readme.md
View file

@ -164,7 +164,7 @@ The `mimalloc` project builds a static library (in `out/msvc-x64`), while the
`mimalloc-override` project builds a DLL for overriding malloc
in the entire program.
## macOS, Linux, BSD, etc.
## Linux, macOS, BSD, etc.
We use [`cmake`](https://cmake.org)<sup>1</sup> as the build system:
@ -200,13 +200,26 @@ free lists, etc., as:
> make
```
This will name the shared library as `libmimalloc-secure.so`.
Use `ccmake`<sup>2</sup> instead of `cmake`
to see and customize all the available build options.
Use `cmake ../.. -LH` to see all the available build options.
Notes:
1. Install CMake: `sudo apt-get install cmake`
2. Install CCMake: `sudo apt-get install cmake-curses-gui`
The examples use the default compiler. If you like to use another, use:
```
> CC=clang CXX=clang++ cmake ../..
```
## Cmake with Visual Studio
You can also use cmake on Windows. Open a Visual Studio development prompt
and invoke `cmake` with the right [generator](https://cmake.org/cmake/help/latest/generator/Visual%20Studio%2017%202022.html)
and architecture, like:
```
> cmake ..\.. -G "Visual Studio 17 2022" -A x64 -DMI_OVERRIDE=ON
```
The cmake build type is specified when actually building, for example:
```
> cmake --build . --config=Release
```
## Single source
@ -415,43 +428,48 @@ Note that certain security restrictions may apply when doing this from
the [shell](https://stackoverflow.com/questions/43941322/dyld-insert-libraries-ignored-when-calling-application-through-bash).
### Dynamic Override on Windows
# Windows Override
<span id="override_on_windows">Dynamically overriding on mimalloc on Windows</span>
is robust and has the particular advantage to be able to redirect all malloc/free calls that go through
the (dynamic) C runtime allocator, including those from other DLL's or libraries.
As it intercepts all allocation calls on a low level, it can be used reliably
is robust and has the particular advantage to be able to redirect all malloc/free calls
that go through the (dynamic) C runtime allocator, including those from other DLL's or
libraries. As it intercepts all allocation calls on a low level, it can be used reliably
on large programs that include other 3rd party components.
There are four requirements to make the overriding work robustly:
There are four requirements to make the overriding work well:
1. Use the C-runtime library as a DLL (using the `/MD` or `/MDd` switch).
2. Link your program explicitly with `mimalloc-override.dll` library.
To ensure the `mimalloc-override.dll` is loaded at run-time it is easiest to insert some
call to the mimalloc API in the `main` function, like `mi_version()`
(or use the `/INCLUDE:mi_version` switch on the linker). See the `mimalloc-override-test` project
for an example on how to use this.
3. The [`mimalloc-redirect.dll`](bin) (or `mimalloc-redirect32.dll`) must be put
in the same folder as the main `mimalloc-override.dll` at runtime (as it is a dependency of that DLL).
The redirection DLL ensures that all calls to the C runtime malloc API get redirected to
mimalloc functions (which reside in `mimalloc-override.dll`).
4. Ensure the `mimalloc-override.dll` comes as early as possible in the import
2. Link your program explicitly with the `mimalloc.lib` export library for the `mimalloc.dll`.
(which must be compiled with `-DMI_OVERRIDE=ON`, which is the default though).
To ensure the `mimalloc.dll` is actually loaded at run-time it is easiest
to insert some call to the mimalloc API in the `main` function, like `mi_version()`
(or use the `/include:mi_version` switch on the linker command, or
similarly, `#pragma comment(linker, "/include:mi_version")` in some source file).
See the `mimalloc-test-override` project for an example on how to use this.
3. The `mimalloc-redirect.dll` must be put in the same folder as the main
`mimalloc.dll` at runtime (as it is a dependency of that DLL).
The redirection DLL ensures that all calls to the C runtime malloc API get
redirected to mimalloc functions (which reside in `mimalloc.dll`).
4. Ensure the `mimalloc.dll` comes as early as possible in the import
list of the final executable (so it can intercept all potential allocations).
You can use `minject -l <exe>` to check this if needed.
For best performance on Windows with C++, it
is also recommended to also override the `new`/`delete` operations (by including
[`mimalloc-new-delete.h`](include/mimalloc-new-delete.h)
[`mimalloc-new-delete.h`](../include/mimalloc-new-delete.h)
a single(!) source file in your project).
The environment variable `MIMALLOC_DISABLE_REDIRECT=1` can be used to disable dynamic
overriding at run-time. Use `MIMALLOC_VERBOSE=1` to check if mimalloc was successfully redirected.
overriding at run-time. Use `MIMALLOC_VERBOSE=1` to check if mimalloc was successfully
redirected.
For different platforms than x64, you may need a specific [redirection dll](bin).
Furthermore, we cannot always re-link an executable or ensure `mimalloc.dll` comes
first in the import table. In such cases the [`minject`](bin) tool can be used
to patch the executable's import tables.
We cannot always re-link an executable with `mimalloc-override.dll`, and similarly, we cannot always
ensure the the DLL comes first in the import table of the final executable.
In many cases though we can patch existing executables without any recompilation
if they are linked with the dynamic C runtime (`ucrtbase.dll`) -- just put the `mimalloc-override.dll`
into the import table (and put `mimalloc-redirect.dll` in the same folder)
Such patching can be done for example with [CFF Explorer](https://ntcore.com/?page_id=388) or
the [`minject`](bin) program.
## Static override

4
test/main-override.cpp
View file

@ -47,6 +47,7 @@ int main() {
mi_stats_reset(); // ignore earlier allocations
various_tests();
test_mixed1();
//test_std_string();
//test_thread_local();
// heap_thread_free_huge();
@ -107,6 +108,9 @@ static void various_tests() {
t = new (tbuf) Test(42);
t->~Test();
delete[] tbuf;
const char* ptr = ::_Getdays(); // test _base overrid
free((void*)ptr);
}
class Static {