jemalloc: Force use of prefixed functions.

* Set JEMALLOC_NO_DEMANGLE to be able to use `je_*` functions,
  regardless of how jemalloc was compiled (--with-jemalloc-prefix)
* Show jemalloc information in Neovim's version output.

Resolve #2449.

CMakeLists.txt

@@ -201,23 +201,14 @@ include_directories(SYSTEM ${LIBVTERM_INCLUDE_DIRS})
 
 option(SANITIZE "Enable Clang sanitizers for nvim binary" OFF)
 if(SANITIZE AND NOT CMAKE_C_COMPILER_ID MATCHES "Clang")
-  message(WARNING "SANITIZE is only supported for Clang ... disabling")
+  message(WARNING "SANITIZE is only supported for Clang, disabling")
   set(SANITIZE OFF)
 endif()
 
-if(SANITIZE)
-  option(USE_JEMALLOC "Use jemalloc" OFF)
-else()
-  option(USE_JEMALLOC "Use jemalloc" ON)
-endif()
-
-if(USE_JEMALLOC)
+if(NOT SANITIZE)
   find_package(JeMalloc)
   if(JEMALLOC_FOUND)
-    message(STATUS "Using jemalloc instead of libc allocator")
     include_directories(SYSTEM ${JEMALLOC_INCLUDE_DIRS})
-  else()
-    set(USE_JEMALLOC OFF)
   endif()
 endif()
 

config/CMakeLists.txt

@@ -46,6 +46,10 @@ if(Iconv_FOUND)
   set(HAVE_ICONV 1)
 endif()
 
+if(JEMALLOC_FOUND)
+  set(HAVE_JEMALLOC 1)
+endif()
+
 check_function_exists(lstat HAVE_LSTAT)
 if(NOT HAVE_LSTAT)
   # os_unix.c uses lstat.c

config/config.h.in

@@ -66,6 +66,9 @@
 #define FEAT_BROWSE
 #define FEAT_CSCOPE
 #define FEAT_MOUSE
-#cmakedefine USE_JEMALLOC
+
+#ifndef UNIT_TESTING
+#cmakedefine HAVE_JEMALLOC
+#endif
 
 #endif  // AUTO_CONFIG_H

src/nvim/CMakeLists.txt

@@ -171,8 +171,8 @@ list(APPEND NVIM_LINK_LIBRARIES
 
 set(NVIM_EXEC_LINK_LIBRARIES ${NVIM_LINK_LIBRARIES})
 
-if(USE_JEMALLOC)
-  # dont use jemalloc in the unit test library
+# Don't use jemalloc in the unit test library.
+if(JEMALLOC_FOUND)
   list(APPEND NVIM_EXEC_LINK_LIBRARIES ${JEMALLOC_LIBRARIES})
 endif()
 

src/nvim/memory.c

@@ -14,16 +14,18 @@
 #include "nvim/misc1.h"
 #include "nvim/ui.h"
 
-#ifdef INCLUDE_GENERATED_DECLARATIONS
-# include "memory.c.generated.h"
+#ifdef HAVE_JEMALLOC
+// Force je_ prefix on jemalloc functions.
+# define JEMALLOC_NO_DEMANGLE
+# include <jemalloc/jemalloc.h>
+# 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
 
-#if defined(USE_JEMALLOC) && !defined(UNIT_TESTING)
-#include "jemalloc/jemalloc.h"
-#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)
+#ifdef INCLUDE_GENERATED_DECLARATIONS
+# include "memory.c.generated.h"
 #endif
 
 /// Try to free memory. Used when trying to recover from out of memory errors.

src/nvim/version.c

@@ -47,21 +47,25 @@ char *version_cflags = "Compilation: " NVIM_VERSION_CFLAGS;
 static char *features[] = {
 #ifdef HAVE_ACL
   "+acl",
-#else  // ifdef HAVE_ACL
+#else
   "-acl",
-#endif  // ifdef HAVE_ACL
+#endif
 
 #if (defined(HAVE_ICONV_H) && defined(USE_ICONV)) || defined(DYNAMIC_ICONV)
 # ifdef DYNAMIC_ICONV
   "+iconv/dyn",
-# else  // ifdef DYNAMIC_ICONV
+# else
   "+iconv",
-# endif  // ifdef DYNAMIC_ICONV
-#else  // if (defined(HAVE_ICONV_H) && defined(USE_ICONV))
-       //    ||defined(DYNAMIC_ICONV)
+# endif
+#else
   "-iconv",
-#endif  // if (defined(HAVE_ICONV_H) && defined(USE_ICONV))
-        //    || defined(DYNAMIC_ICONV)
+#endif
+
+#ifdef HAVE_JEMALLOC
+  "+jemalloc",
+#else
+  "-jemalloc",
+#endif
   NULL
 };
 

third-party/cmake/BuildJeMalloc.cmake

@@ -11,8 +11,8 @@ ExternalProject_Add(jemalloc
     -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/DownloadAndExtractFile.cmake
   BUILD_IN_SOURCE 1
   CONFIGURE_COMMAND sh ${DEPS_BUILD_DIR}/src/jemalloc/autogen.sh &&
-    ${DEPS_BUILD_DIR}/src/jemalloc/configure --with-jemalloc-prefix=je_
-    --enable-cc-silence CC=${DEPS_C_COMPILER} --prefix=${DEPS_INSTALL_DIR}
+    ${DEPS_BUILD_DIR}/src/jemalloc/configure --enable-cc-silence
+    CC=${DEPS_C_COMPILER} --prefix=${DEPS_INSTALL_DIR}
   BUILD_COMMAND ""
   INSTALL_COMMAND ${MAKE_PRG} install_include install_lib)