Remove support for using jemalloc instead of the system allocator

There was never any investigation done to determine whether using
jemalloc was actually a net benefit for nvim.  It has been a portability
limitation and adds another factor to consider when triaging issues.

CMakeLists.txt

@@ -456,22 +456,6 @@ if((CLANG_ASAN_UBSAN OR CLANG_MSAN OR CLANG_TSAN) AND NOT CMAKE_C_COMPILER_ID MA
   message(FATAL_ERROR "Sanitizers are only supported for Clang")
 endif()
 
-if(CMAKE_SYSTEM_NAME MATCHES "OpenBSD|FreeBSD|Windows")  # see #5318
-  message(STATUS "skipping jemalloc on this system: ${CMAKE_SYSTEM_NAME}")
-  option(ENABLE_JEMALLOC "enable jemalloc" OFF)
-else()
-  option(ENABLE_JEMALLOC "enable jemalloc" ON)
-endif()
-
-if(ENABLE_JEMALLOC)
-  if(CLANG_ASAN_UBSAN OR CLANG_MSAN OR CLANG_TSAN)
-    message(STATUS "Sanitizers enabled; disabling jemalloc")
-  else()
-    find_package(JeMalloc REQUIRED)
-    include_directories(SYSTEM ${JEMALLOC_INCLUDE_DIRS})
-  endif()
-endif()
-
 if(ENABLE_LIBINTL)
   # LibIntl (not Intl) selects our FindLibIntl.cmake script. #8464
   find_package(LibIntl REQUIRED)

README.md

@@ -68,7 +68,7 @@ To skip bundled (`third-party/*`) dependencies:
 
 1. Install the dependencies using a package manager.
    ```
-   sudo apt install gperf luajit luarocks libuv1-dev libluajit-5.1-dev libunibilium-dev libmsgpack-dev libtermkey-dev libvterm-dev libjemalloc-dev
+   sudo apt install gperf luajit luarocks libuv1-dev libluajit-5.1-dev libunibilium-dev libmsgpack-dev libtermkey-dev libvterm-dev
    sudo luarocks build mpack
    sudo luarocks build lpeg
    sudo luarocks build inspect

cmake/FindJeMalloc.cmake

@@ -1,50 +0,0 @@
-# - Try to find jemalloc
-# Once done this will define
-#  JEMALLOC_FOUND - System has jemalloc
-#  JEMALLOC_INCLUDE_DIRS - The jemalloc include directories
-#  JEMALLOC_LIBRARIES - The libraries needed to use jemalloc
-
-if(NOT USE_BUNDLED_JEMALLOC)
-  find_package(PkgConfig)
-  if (PKG_CONFIG_FOUND)
-    pkg_check_modules(PC_JEMALLOC QUIET jemalloc)
-  endif()
-else()
-  set(PC_JEMALLOC_INCLUDEDIR)
-  set(PC_JEMALLOC_INCLUDE_DIRS)
-  set(PC_JEMALLOC_LIBDIR)
-  set(PC_JEMALLOC_LIBRARY_DIRS)
-  set(LIMIT_SEARCH NO_DEFAULT_PATH)
-endif()
-
-set(JEMALLOC_DEFINITIONS ${PC_JEMALLOC_CFLAGS_OTHER})
-
-find_path(JEMALLOC_INCLUDE_DIR jemalloc/jemalloc.h
-          PATHS ${PC_JEMALLOC_INCLUDEDIR} ${PC_JEMALLOC_INCLUDE_DIRS}
-          ${LIMIT_SEARCH})
-
-# If we're asked to use static linkage, add libjemalloc.a as a preferred library name.
-if(JEMALLOC_USE_STATIC)
-  list(APPEND JEMALLOC_NAMES
-    "${CMAKE_STATIC_LIBRARY_PREFIX}jemalloc${CMAKE_STATIC_LIBRARY_SUFFIX}")
-elseif(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
-  list(INSERT JEMALLOC_NAMES 0
-    "${CMAKE_STATIC_LIBRARY_PREFIX}jemalloc${CMAKE_STATIC_LIBRARY_SUFFIX}")
-endif()
-
-list(APPEND JEMALLOC_NAMES jemalloc)
-
-find_library(JEMALLOC_LIBRARY NAMES ${JEMALLOC_NAMES}
-  HINTS ${PC_JEMALLOC_LIBDIR} ${PC_JEMALLOC_LIBRARY_DIRS}
-  ${LIMIT_SEARCH})
-
-set(JEMALLOC_LIBRARIES ${JEMALLOC_LIBRARY})
-set(JEMALLOC_INCLUDE_DIRS ${JEMALLOC_INCLUDE_DIR})
-
-include(FindPackageHandleStandardArgs)
-# handle the QUIETLY and REQUIRED arguments and set JEMALLOC_FOUND to TRUE
-# if all listed variables are TRUE
-find_package_handle_standard_args(JeMalloc DEFAULT_MSG
-  JEMALLOC_LIBRARY JEMALLOC_INCLUDE_DIR)
-
-mark_as_advanced(JEMALLOC_INCLUDE_DIR JEMALLOC_LIBRARY)

config/CMakeLists.txt

@@ -47,10 +47,6 @@ if(Iconv_FOUND)
   set(HAVE_ICONV 1)
 endif()
 
-if(JEMALLOC_FOUND)
-  set(HAVE_JEMALLOC 1)
-endif()
-
 check_function_exists(_putenv_s HAVE_PUTENV_S)
 if(WIN32 AND NOT HAVE_PUTENV_S)
   message(SEND_ERROR "_putenv_s() function not found on your system.")

config/config.h.in

@@ -62,7 +62,6 @@
 #cmakedefine FEAT_TUI
 
 #ifndef UNIT_TESTING
-#cmakedefine HAVE_JEMALLOC
 #cmakedefine LOG_LIST_ACTIONS
 #endif
 

contrib/local.mk.example

@@ -7,10 +7,6 @@
 # These CFLAGS can be used in addition to those specified in CMakeLists.txt:
 # CMAKE_EXTRA_FLAGS="-DCMAKE_C_FLAGS=-ftrapv -Wlogical-op"
 
-# By default, the jemalloc family of memory allocation functions are used.
-# Uncomment the following to instead use libc memory allocation functions.
-# CMAKE_EXTRA_FLAGS += -DENABLE_JEMALLOC=OFF
-
 # Sets the build type; defaults to Debug. Valid values:
 #
 # - Debug:          Disables optimizations (-O0), enables debug information.
@@ -36,7 +32,6 @@
 # them.
 #
 # DEPS_CMAKE_FLAGS += -DUSE_BUNDLED_BUSTED=OFF
-# DEPS_CMAKE_FLAGS += -DUSE_BUNDLED_JEMALLOC=OFF
 # DEPS_CMAKE_FLAGS += -DUSE_BUNDLED_LIBTERMKEY=OFF
 # DEPS_CMAKE_FLAGS += -DUSE_BUNDLED_LIBUV=OFF
 # DEPS_CMAKE_FLAGS += -DUSE_BUNDLED_LIBVTERM=OFF

src/coverity-model.c

@@ -34,32 +34,6 @@ int uv_pipe_open(struct uv_pipe_s *handle, int fd)
   return result;
 }
 
-// Issue 2422
-//
-// Teach coverity about jemalloc functions, so that it understands
-// they are equivalent to malloc ones.
-
-void *je_malloc(size_t size)
-{
-  return __coverity_alloc__(size);
-}
-
-void je_free(void *ptr)
-{
-  __coverity_free__(ptr);
-}
-
-void *je_calloc(size_t count, size_t size)
-{
-  return je_malloc(count * size);
-}
-
-void *je_realloc(void *ptr, size_t size)
-{
-  je_free(ptr);
-  return je_malloc(size);
-}
-
 // Hint Coverity that adding item to d avoids losing track
 // of the memory allocated for item.
 typedef struct {} dictitem_T;

src/nvim/CMakeLists.txt

@@ -397,11 +397,6 @@ endif()
 
 set(NVIM_EXEC_LINK_LIBRARIES ${NVIM_LINK_LIBRARIES} ${LUA_PREFERRED_LIBRARIES})
 
-# Don't use jemalloc in the unit test library.
-if(JEMALLOC_FOUND)
-  list(APPEND NVIM_EXEC_LINK_LIBRARIES ${JEMALLOC_LIBRARIES})
-endif()
-
 if(POLICY CMP0069)
   cmake_policy(SET CMP0069 NEW)
 endif()

src/nvim/memory.c

@@ -18,35 +18,15 @@
 #include "nvim/ui.h"
 #include "nvim/api/vim.h"
 
-#ifdef HAVE_JEMALLOC
-// Force je_ prefix on jemalloc functions.
-# define JEMALLOC_NO_DEMANGLE
-# include <jemalloc/jemalloc.h>
-#endif
-
 #ifdef UNIT_TESTING
 # define malloc(size) mem_malloc(size)
 # define calloc(count, size) mem_calloc(count, size)
 # define realloc(ptr, size) mem_realloc(ptr, size)
 # define free(ptr) mem_free(ptr)
-# ifdef HAVE_JEMALLOC
-MemMalloc mem_malloc = &je_malloc;
-MemFree mem_free = &je_free;
-MemCalloc mem_calloc = &je_calloc;
-MemRealloc mem_realloc = &je_realloc;
-# else
 MemMalloc mem_malloc = &malloc;
 MemFree mem_free = &free;
 MemCalloc mem_calloc = &calloc;
 MemRealloc mem_realloc = &realloc;
-# endif
-#else
-# ifdef HAVE_JEMALLOC
-#  define malloc(size) je_malloc(size)
-#  define calloc(count, size) je_calloc(count, size)
-#  define realloc(ptr, size) je_realloc(ptr, size)
-#  define free(ptr) je_free(ptr)
-# endif
 #endif
 
 #ifdef INCLUDE_GENERATED_DECLARATIONS

src/nvim/version.c

@@ -62,12 +62,6 @@ static char *features[] = {
 "-iconv",
 #endif
 
-#ifdef HAVE_JEMALLOC
-"+jemalloc",
-#else
-"-jemalloc",
-#endif
-
 #ifdef FEAT_TUI
 "+tui",
 #else

third-party/CMakeLists.txt

@@ -30,7 +30,6 @@ set(DEPS_DOWNLOAD_DIR "${DEPS_BUILD_DIR}/downloads" CACHE PATH "Dependencies dow
 option(USE_BUNDLED "Use bundled dependencies." ON)
 
 option(USE_BUNDLED_GPERF "Use the bundled version of gperf." ${USE_BUNDLED})
-option(USE_BUNDLED_JEMALLOC "Use the bundled jemalloc." ${USE_BUNDLED})
 option(USE_BUNDLED_UNIBILIUM "Use the bundled unibilium." ${USE_BUNDLED})
 option(USE_BUNDLED_LIBTERMKEY "Use the bundled libtermkey." ${USE_BUNDLED})
 option(USE_BUNDLED_LIBVTERM "Use the bundled libvterm." ${USE_BUNDLED})
@@ -150,9 +149,6 @@ set(LIBTERMKEY_SHA256 6c0d87c94ab9915e76ecd313baec08dedf3bd56de83743d9aa923a0819
 set(LIBVTERM_URL https://github.com/neovim/libvterm/archive/3f62ac6b7bdffda39d68f723fb1806dfd6d6382d.tar.gz)
 set(LIBVTERM_SHA256 1c8b318370f00f831f43e3ec86a48984250e3ee5c76beb106a421c9a42286ac5)
 
-set(JEMALLOC_URL https://github.com/jemalloc/jemalloc/releases/download/4.5.0/jemalloc-4.5.0.tar.bz2)
-set(JEMALLOC_SHA256 9409d85664b4f135b77518b0b118c549009dc10f6cba14557d170476611f6780)
-
 set(LUV_URL https://github.com/luvit/luv/archive/1.9.1-1.tar.gz)
 set(LUV_SHA256 562b9efaad30aa051a40eac9ade0c3df48bb8186763769abe47ec3fb3edb1268)
 
@@ -212,10 +208,6 @@ if(USE_BUNDLED_LUAROCKS)
   include(BuildLuarocks)
 endif()
 
-if(USE_BUNDLED_JEMALLOC)
-  include(BuildJeMalloc)
-endif()
-
 if(USE_BUNDLED_LUV)
   include(BuildLuv)
 endif()

third-party/cmake/BuildJeMalloc.cmake

@@ -1,24 +0,0 @@
-if(WIN32)
-  message(STATUS "Building jemalloc in Windows is not supported (skipping)")
-  return()
-endif()
-
-ExternalProject_Add(jemalloc
-  PREFIX ${DEPS_BUILD_DIR}
-  URL ${JEMALLOC_URL}
-  DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/jemalloc
-  DOWNLOAD_COMMAND ${CMAKE_COMMAND}
-    -DPREFIX=${DEPS_BUILD_DIR}
-    -DDOWNLOAD_DIR=${DEPS_DOWNLOAD_DIR}/jemalloc
-    -DURL=${JEMALLOC_URL}
-    -DEXPECTED_SHA256=${JEMALLOC_SHA256}
-    -DTARGET=jemalloc
-    -DUSE_EXISTING_SRC_DIR=${USE_EXISTING_SRC_DIR}
-    -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/DownloadAndExtractFile.cmake
-  BUILD_IN_SOURCE 1
-  CONFIGURE_COMMAND ${DEPS_BUILD_DIR}/src/jemalloc/configure
-     CC=${DEPS_C_COMPILER} --prefix=${DEPS_INSTALL_DIR}
-  BUILD_COMMAND ""
-  INSTALL_COMMAND ${MAKE_PRG} install_include install_lib_static)
-
-list(APPEND THIRD_PARTY_DEPS jemalloc)