mozglue/build/Makefile.in

   1 #
   2 # This Source Code Form is subject to the terms of the Mozilla Public
   3 # License, v. 2.0. If a copy of the MPL was not distributed with this
   4 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
   5
   6 DIST_INSTALL = 1
   7
   8 # For FORCE_SHARED_LIB
   9 include $(topsrcdir)/config/config.mk
  10
  11 ifneq (1_1,$(MOZ_MEMORY)_$(or $(MOZ_NATIVE_JEMALLOC),$(FORCE_SHARED_LIB)))
  12
  13 ifneq (,$(filter OS2 WINNT,$(OS_ARCH)))
  14 SDK_LIBRARY = $(IMPORT_LIBRARY)
  15 else
  16 ifdef FORCE_SHARED_LIB
  17 SDK_LIBRARY = $(SHARED_LIBRARY)
  18 else
  19 SDK_LIBRARY = $(REAL_LIBRARY)
  20 endif
  21 endif
  22
  23 endif
  24
  25 MOZ_GLUE_LDFLAGS = # Don't link against ourselves
  26
  27 ifneq (,$(ZLIB_IN_MOZGLUE)$(MOZ_LINKER))
  28 ifdef MOZ_NATIVE_ZLIB
  29 EXTRA_DSO_LDOPTS += $(MOZ_ZLIB_LIBS)
  30 else
  31 SHARED_LIBRARY_LIBS += $(MOZ_ZLIB_LIBS)
  32 endif
  33 endif
  34
  35 ifeq (WINNT,$(OS_TARGET))
  36 DEFFILE = mozglue.def
  37
  38 mozglue.def: mozglue.def.in
  39         $(call py_action,preprocessor,$(if $(MOZ_REPLACE_MALLOC),-DMOZ_REPLACE_MALLOC) $(ACDEFINES) $< -o $@)
  40
  41 GARBAGE += mozglue.def
  42
  43 ifneq (,$(filter -DEFAULTLIB:mozcrt,$(MOZ_GLUE_LDFLAGS)))
  44 # Don't install the import library if we use mozcrt
  45 NO_INSTALL_IMPORT_LIBRARY = 1
  46 endif
  47
  48
  49 EXTRA_DSO_LDOPTS += \
  50         version.lib \
  51         $(NULL)
  52
  53 STL_FLAGS=
  54
  55 endif
  56
  57 ifeq (Darwin_1,$(OS_TARGET)_$(MOZ_REPLACE_MALLOC))
  58 EXTRA_DSO_LDOPTS += \
  59   -Wl,-U,_replace_init \
  60   -Wl,-U,_replace_malloc \
  61   -Wl,-U,_replace_posix_memalign \
  62   -Wl,-U,_replace_aligned_alloc \
  63   -Wl,-U,_replace_calloc \
  64   -Wl,-U,_replace_realloc \
  65   -Wl,-U,_replace_free \
  66   -Wl,-U,_replace_memalign \
  67   -Wl,-U,_replace_valloc \
  68   -Wl,-U,_replace_malloc_usable_size \
  69   -Wl,-U,_replace_malloc_good_size \
  70   -Wl,-U,_replace_jemalloc_stats \
  71   -Wl,-U,_replace_jemalloc_purge_freed_pages \
  72   -Wl,-U,_replace_jemalloc_free_dirty_pages \
  73   $(NULL)
  74
  75 ifneq ($(MOZ_REPLACE_MALLOC_LINKAGE),compiler support)
  76 EXTRA_DSO_LDOPTS += -flat_namespace
  77 endif
  78 ifeq ($(MOZ_REPLACE_MALLOC_LINKAGE),dummy library)
  79 EXTRA_DSO_LDOPTS += -Wl,-weak_library,$(DEPTH)/memory/replace/dummy/$(DLL_PREFIX)replace_malloc$(DLL_SUFFIX)
  80 endif
  81 endif
  82
  83 ifeq (android, $(MOZ_WIDGET_TOOLKIT))
  84 # To properly wrap jemalloc's pthread_atfork call.
  85 EXTRA_DSO_LDOPTS += -Wl,--wrap=pthread_atfork
  86 endif
  87
  88 ifdef MOZ_LINKER
  89 ifeq (arm, $(TARGET_CPU))
  90 EXTRA_DSO_LDOPTS += -Wl,-version-script,$(srcdir)/arm-eabi-filter
  91 endif
  92
  93 endif
  94
  95 ifeq (Android, $(OS_TARGET))
  96 WRAP_LDFLAGS := $(filter -Wl%,$(WRAP_LDFLAGS))
  97 endif
  98
  99 include $(topsrcdir)/config/rules.mk
 100
 101 ifdef MOZ_MEMORY
 102 ifeq (WINNT,$(OS_TARGET))
 103 # Roll our own custom logic here for the import library
 104
 105 ###############################################################################
 106 #
 107 # Linking Mozilla itself to jemalloc is not particularly difficult.  To do this
 108 # we avoid linking directly to the Microsoft-provided CRT import libraries.
 109 # Instead, we link to our own import library which we generate here.  To
 110 # replace the CRT's malloc/free/other memory management symbols we export
 111 # our own versions out of jemalloc.dll.  We then take the import library that
 112 # the compiler generates for jemalloc.dll and combine it with the MS CRT import
 113 # libraries.  We put our library on the command line first, and the CRT symbols
 114 # are discarded in favor of our versions!
 115 #
 116 # Unfortunately that was too easy.  The CRT import library is not a standard
 117 # import library that contains a list of symbols and whatnot.  It also includes
 118 # object files that are linked into generated programs.  One of these,
 119 # crtdll.obj is (as one might expect) linked into all DLLs that link against
 120 # the CRT.  This file does things like run static C++ constructors when the
 121 # DLL is attached, call DllMain, etc.
 122 #
 123 # In the CRT source all malloc/free calls are made to malloc_crt and free_crt.
 124 # In debug builds these are both defined to malloc_dbg and free_dbg.  In opt
 125 # builds malloc_crt is an actual function, implemented and exposed from the
 126 # CRT.  free_crt is, however, defined to be just plain old free.  This works
 127 # fine inside the CRT where malloc_crt and free operate on the same heap.
 128 # Outside the CRT malloc_crt is in the CRT's heap, but free is in jemalloc's
 129 # heap.  This causes much pain at shutdown :-(
 130 #
 131 # The obvious solution here is to override malloc_crt too.  Unfortunately,
 132 # that doesn't work because the CRT expects to be able to call msize on this
 133 # piece of memory deep inside the CRT, which will fail because it'll call the
 134 # CRT's msize on a pointer in jemalloc's heap.
 135 #
 136 # Our solution to this is quite devious.  We take apart the CRT's import lib
 137 # and remove the problematic object file.  We then poke at the object file's
 138 # symbol table and replace '__imp__free' (which means grab free from some
 139 # other DLL) with '__imp__frex'.  Then we define our own dummy no-op function
 140 # in jemalloc.dll and export it as frex.  Then we put the CRT import lib
 141 # back together with the patched crtdll.obj, glue it to the end of jemalloc's
 142 # import library and link the rest of Mozilla to that.
 143 #
 144 # The result?  A binary that uses jemalloc, doesn't crash, and leaks a tiny
 145 # amount of memory (32 words per DLL in the 2010 CRT) at shutdown.
 146 #
 147 ###############################################################################
 148
 149 libs:: mozcrt.lib
 150         $(INSTALL) $(IFLAGS2) mozcrt.lib $(DIST)/lib
 151
 152 # And finally combine that with the jemalloc import library to get an import
 153 # library that has our malloc/free/etc and the CRT's everything else
 154 mozcrt.lib: $(IMPORT_LIBRARY) msvc_modified.lib
 155         lib -OUT:$@ $^
 156
 157 # Put the fixed object file back in
 158 msvc_modified.lib: msvc_removed.lib crtdll_fixed.obj
 159         lib -OUT:$@ $^
 160
 161 # Fix the object file
 162 crtdll_fixed.obj: crtdll.obj
 163         $(PYTHON) $(srcdir)/fixcrt.py
 164
 165 # Find the path of crtdll.obj
 166 CRTDLL_FULLPATH=$(subst \,\\,$(shell lib -list msvc_combined.lib | grep crtdll\\.obj))
 167
 168 # Remove the broken object file, only after we have extracted it
 169 msvc_removed.lib: msvc_combined.lib crtdll.obj
 170         lib -OUT:$@ msvc_combined.lib -REMOVE:$(CRTDLL_FULLPATH)
 171
 172 # Extract the broken object file out of the combined library
 173 crtdll.obj: msvc_combined.lib
 174         lib -OUT:$@ $^ -EXTRACT:$(CRTDLL_FULLPATH)
 175
 176 # Grab both CRT libraries and combine them into one library to simplify things
 177 msvc_combined.lib:
 178         lib -OUT:$@ $(WIN32_CRT_LIBS)
 179 endif
 180 endif # MOZ_MEMORY