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qtbase/src/tools/bootstrap/CMakeLists.txt
Aurélien Brooke 03d5daf943 Add jemalloc support 
Large graphical Qt applications heavily rely on heap allocations.
Jemalloc is a general-purpose malloc(3) implementation designed to
reduce heap fragmentation and improve scalability. It also provides
extensive tuning options.

Add a -jemalloc configure option, disabled by default. When enabled, Qt
and user code link to jemalloc, overriding the system's default
malloc().

Add cooperation with jemalloc for some Qt key classes: QArrayData (used
by QByteArray, QString and QList<T>), QBindingStoragePrivate,
QDataBuffer (used by the Qt Quick renderer), QDistanceFieldData,
QImageData, QObjectPrivate::TaggedSignalVector, QVarLengthArray.

This cooperation relies on two jemalloc-specific optimizations:
1. Efficient allocation via fittedMalloc():
   Determine the actual allocation size using nallocx(), then adjust the
   container’s capacity to match. This minimizes future reallocations.
   Note: we round allocSize to a multiple of sizeof(T) to ensure that
   we can later recompute the exact allocation size during deallocation.
2. Optimized deallocation via sizedFree():
   Use sdallocx(), which is faster than free when the allocation size
   is known, as it avoids internal size lookups.

Adapt the QVarLengthArray auto tests on capacity.

Non-standard functions docs are at https://jemalloc.net/jemalloc.3.html

[ChangeLog][QtCore] Added optional support for the jemalloc allocator,
and optimized memory allocations and deallocations in core Qt classes to
cooperate with it.

Change-Id: I6166e64e66876dee22662d3f3ea3e42a6647cfeb
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2025-04-09 13:49:11 +02:00

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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: BSD-3-Clause
#####################################################################
## Bootstrap Module:
#####################################################################
# The bootstrap library has a few manual tweaks compared to other
# libraries.
qt_add_library(Bootstrap STATIC)
qt_internal_add_sbom(Bootstrap
TYPE QT_MODULE
NO_INSTALL
)
qt_internal_add_sync_header_dependencies(Bootstrap Core)
qt_internal_extend_target(Bootstrap
SOURCES
../../corelib/global/qalloc.cpp
../../corelib/global/qassert.cpp
../../corelib/global/qtenvironmentvariables.cpp
../../corelib/io/qabstractfileengine.cpp
../../corelib/io/qdir.cpp
../../corelib/io/qfile.cpp
../../corelib/io/qfiledevice.cpp
../../corelib/io/qfileinfo.cpp
../../corelib/io/qfilesystemengine.cpp
../../corelib/io/qfilesystementry.cpp
../../corelib/io/qfsfileengine.cpp
../../corelib/io/qfsfileengine_iterator.cpp
../../corelib/io/qiodevice.cpp
../../corelib/kernel/qcoreapplication.cpp
../../corelib/kernel/qmetatype.cpp
../../corelib/kernel/qsystemerror.cpp
../../corelib/serialization/qcborcommon.cpp
../../corelib/serialization/qcborstreamwriter.cpp
../../corelib/serialization/qcborvalue.cpp
../../corelib/serialization/qjsonarray.cpp
../../corelib/serialization/qjsoncbor.cpp
../../corelib/serialization/qjsondocument.cpp
../../corelib/serialization/qjsonobject.cpp
../../corelib/serialization/qjsonparser.cpp
../../corelib/serialization/qjsonvalue.cpp
../../corelib/serialization/qjsonwriter.cpp
../../corelib/serialization/qtextstream.cpp
../../corelib/text/qbytearray.cpp
../../corelib/text/qbytearraylist.cpp
../../corelib/text/qbytearraymatcher.cpp
../../corelib/text/qlatin1stringmatcher.cpp
../../corelib/text/qlocale.cpp
../../corelib/text/qlocale_tools.cpp
../../corelib/text/qregularexpression.cpp
../../corelib/text/qstring.cpp
../../corelib/text/qstringbuilder.cpp
../../corelib/text/qstringconverter.cpp
../../corelib/text/qstringlist.cpp
../../corelib/time/qcalendar.cpp
../../corelib/time/qdatetime.cpp
../../corelib/time/qgregoriancalendar.cpp
../../corelib/time/qlocaltime.cpp
../../corelib/time/qromancalendar.cpp
../../corelib/time/qtimezone.cpp
../../corelib/tools/qarraydata.cpp
../../corelib/tools/qcommandlineoption.cpp
../../corelib/tools/qcommandlineparser.cpp
../../corelib/tools/qhash.cpp
../../corelib/tools/qringbuffer.cpp
DEFINES
HAVE_CONFIG_H
QT_TYPESAFE_FLAGS
PUBLIC_DEFINES
QT_VERSION_MAJOR=${PROJECT_VERSION_MAJOR}
QT_VERSION_MINOR=${PROJECT_VERSION_MINOR}
QT_VERSION_PATCH=${PROJECT_VERSION_PATCH}
QT_VERSION_STR="${PROJECT_VERSION}"
QT_USE_QSTRINGBUILDER
QT_BOOTSTRAPPED
QT_NO_CAST_FROM_ASCII
QT_NO_CAST_TO_ASCII
QT_NO_FOREACH
INCLUDE_DIRECTORIES
..
../../3rdparty/tinycbor/src
PUBLIC_INCLUDE_DIRECTORIES
$<TARGET_PROPERTY:Core,INCLUDE_DIRECTORIES>
../../corelib/global
PUBLIC_LIBRARIES
Qt::Platform
NO_UNITY_BUILD
)
## Scopes:
#####################################################################
qt_internal_extend_target(Bootstrap CONDITION UNIX
SOURCES
../../corelib/io/qfilesystemengine_unix.cpp
../../corelib/io/qfilesystemiterator_unix.cpp
../../corelib/io/qfsfileengine_unix.cpp
../../corelib/kernel/qcore_unix.cpp
)
if(APPLE)
set_source_files_properties(../../corelib/io/qfilesystemengine_unix.cpp PROPERTIES LANGUAGE OBJCXX)
qt_internal_extend_target(Bootstrap CONDITION
PUBLIC_LIBRARIES ${FWUniformTypeIdentifiers}
)
endif()
qt_internal_extend_target(Bootstrap CONDITION WIN32
SOURCES
../../corelib/io/qfilesystemengine_win.cpp
../../corelib/io/qfilesystemiterator_win.cpp
../../corelib/io/qfsfileengine_win.cpp
../../corelib/kernel/qfunctions_win.cpp
PUBLIC_LIBRARIES
advapi32
netapi32
ole32
shell32
user32
)
qt_internal_extend_target(Bootstrap CONDITION MSVC AND CLANG
LIBRARIES
clang_rt.builtins-x86_64
)
qt_internal_extend_target(Bootstrap CONDITION APPLE
SOURCES
../../corelib/kernel/qcore_foundation.mm
../../corelib/kernel/qcore_mac.mm
PUBLIC_LIBRARIES
${FWFoundation}
)
qt_internal_extend_target(Bootstrap CONDITION MACOS
SOURCES
LIBRARIES
${FWCoreServices}
)
qt_internal_extend_target(Bootstrap CONDITION UIKIT
LIBRARIES
${FWUIKit}
)
qt_internal_extend_target(Bootstrap CONDITION CMAKE_CROSSCOMPILING OR NOT QT_FEATURE_system_pcre2
SOURCES
../../3rdparty/pcre2/src/config.h
../../3rdparty/pcre2/src/pcre2.h
../../3rdparty/pcre2/src/pcre2_auto_possess.c
../../3rdparty/pcre2/src/pcre2_chartables.c
../../3rdparty/pcre2/src/pcre2_chkdint.c
../../3rdparty/pcre2/src/pcre2_compile.c
../../3rdparty/pcre2/src/pcre2_compile_class.c
../../3rdparty/pcre2/src/pcre2_config.c
../../3rdparty/pcre2/src/pcre2_context.c
../../3rdparty/pcre2/src/pcre2_dfa_match.c
../../3rdparty/pcre2/src/pcre2_error.c
../../3rdparty/pcre2/src/pcre2_extuni.c
../../3rdparty/pcre2/src/pcre2_find_bracket.c
../../3rdparty/pcre2/src/pcre2_internal.h
../../3rdparty/pcre2/src/pcre2_intmodedep.h
../../3rdparty/pcre2/src/pcre2_jit_compile.c
../../3rdparty/pcre2/src/pcre2_maketables.c
../../3rdparty/pcre2/src/pcre2_match.c
../../3rdparty/pcre2/src/pcre2_match_data.c
../../3rdparty/pcre2/src/pcre2_newline.c
../../3rdparty/pcre2/src/pcre2_ord2utf.c
../../3rdparty/pcre2/src/pcre2_pattern_info.c
../../3rdparty/pcre2/src/pcre2_script_run.c
../../3rdparty/pcre2/src/pcre2_serialize.c
../../3rdparty/pcre2/src/pcre2_string_utils.c
../../3rdparty/pcre2/src/pcre2_study.c
../../3rdparty/pcre2/src/pcre2_substitute.c
../../3rdparty/pcre2/src/pcre2_substring.c
../../3rdparty/pcre2/src/pcre2_tables.c
../../3rdparty/pcre2/src/pcre2_ucd.c
../../3rdparty/pcre2/src/pcre2_ucp.h
../../3rdparty/pcre2/src/pcre2_valid_utf.c
../../3rdparty/pcre2/src/pcre2_xclass.c
INCLUDE_DIRECTORIES
../../3rdparty/pcre2/src
DEFINES
PCRE2_CODE_UNIT_WIDTH=16
PCRE2_DISABLE_JIT
PUBLIC_INCLUDE_DIRECTORIES
$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../../3rdparty/pcre2/src>
ATTRIBUTION_FILE_DIR_PATHS
../../3rdparty/pcre2
)
qt_internal_extend_target(Bootstrap
CONDITION WIN32 AND (CMAKE_CROSSCOMPILING OR NOT QT_FEATURE_system_pcre2)
PUBLIC_DEFINES PCRE2_STATIC
)
qt_internal_extend_target(Bootstrap CONDITION QT_FEATURE_system_pcre2 AND NOT CMAKE_CROSSCOMPILING
LIBRARIES
WrapPCRE2::WrapPCRE2
)
qt_internal_extend_target(Bootstrap CONDITION MINGW AND WIN32
PUBLIC_LIBRARIES
uuid
)
target_link_libraries(Bootstrap PRIVATE PlatformCommonInternal)
qt_internal_apply_gc_binaries(Bootstrap PUBLIC)
set_target_properties(Bootstrap PROPERTIES AUTOMOC OFF AUTOUIC OFF AUTORCC OFF)
qt_internal_add_target_aliases(Bootstrap)
qt_set_msvc_cplusplus_options(Bootstrap PUBLIC)
qt_set_common_target_properties(Bootstrap)
qt_internal_apply_intel_cet(Bootstrap PUBLIC)
if(WARNINGS_ARE_ERRORS)
qt_internal_set_warnings_are_errors_flags(Bootstrap PRIVATE)
endif()
qt_internal_extend_target(Bootstrap CONDITION MSVC
DEFINES
_CRT_SECURE_NO_WARNINGS
)
if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.20.0" AND QT_FEATURE_debug_and_release)
set_property(TARGET Bootstrap
PROPERTY EXCLUDE_FROM_ALL "$<NOT:$<CONFIG:${QT_MULTI_CONFIG_FIRST_CONFIG}>>")
endif()
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