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200 lines
6.8 KiB
Makefile
200 lines
6.8 KiB
Makefile
#
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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DEPTH = @DEPTH@
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topsrcdir = @top_srcdir@
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srcdir = @srcdir@
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VPATH = @srcdir@
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include $(DEPTH)/config/autoconf.mk
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DIST_INSTALL = 1
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# Build mozglue as a shared lib on Windows, OSX and Android.
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# If this is ever changed, update MOZ_SHARED_MOZGLUE in browser/installer/Makefile.in
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ifneq (,$(filter WINNT Darwin Android,$(OS_TARGET)))
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FORCE_SHARED_LIB = 1
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else
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FORCE_STATIC_LIB = 1
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endif
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# Keep jemalloc separated when mozglue is statically linked
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ifeq (1_1,$(MOZ_MEMORY)_$(or $(MOZ_NATIVE_JEMALLOC),$(FORCE_SHARED_LIB)))
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SHARED_LIBRARY_LIBS = $(call EXPAND_LIBNAME_PATH,memory,$(DEPTH)/memory/build)
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else
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# Temporary, until bug 662814 lands
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VISIBILITY_FLAGS =
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ifneq (,$(filter OS2 WINNT,$(OS_ARCH)))
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SDK_LIBRARY = $(IMPORT_LIBRARY)
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else
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ifdef FORCE_SHARED_LIB
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SDK_LIBRARY = $(SHARED_LIBRARY)
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else
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SDK_LIBRARY = $(REAL_LIBRARY)
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endif
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endif
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endif
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MOZ_GLUE_LDFLAGS = # Don't link against ourselves
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ifeq (WINNT,$(OS_TARGET))
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DEFFILE = mozglue.def
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mozglue.def: mozglue.def.in
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$(PYTHON) $(topsrcdir)/config/Preprocessor.py $(if $(MOZ_REPLACE_MALLOC),-DMOZ_REPLACE_MALLOC) $(ACDEFINES) $< > $@
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GARBAGE += mozglue.def
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ifneq (,$(filter -DEFAULTLIB:mozcrt,$(MOZ_GLUE_LDFLAGS)))
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# Don't install the import library if we use mozcrt
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NO_INSTALL_IMPORT_LIBRARY = 1
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endif
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EXTRA_DSO_LDOPTS += $(MOZ_ZLIB_LIBS)
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endif
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ifeq (Darwin_1,$(OS_TARGET)_$(MOZ_REPLACE_MALLOC))
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EXTRA_DSO_LDOPTS += \
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-Wl,-U,_replace_init \
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-Wl,-U,_replace_malloc \
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-Wl,-U,_replace_posix_memalign \
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-Wl,-U,_replace_aligned_alloc \
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-Wl,-U,_replace_calloc \
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-Wl,-U,_replace_realloc \
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-Wl,-U,_replace_free \
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-Wl,-U,_replace_memalign \
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-Wl,-U,_replace_valloc \
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-Wl,-U,_replace_malloc_usable_size \
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-Wl,-U,_replace_malloc_good_size \
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-Wl,-U,_replace_jemalloc_stats \
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-Wl,-U,_replace_jemalloc_purge_freed_pages \
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-Wl,-U,_replace_jemalloc_free_dirty_pages \
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$(NULL)
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ifneq ($(MOZ_REPLACE_MALLOC_LINKAGE),compiler support)
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EXTRA_DSO_LDOPTS += -flat_namespace
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endif
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ifeq ($(MOZ_REPLACE_MALLOC_LINKAGE),dummy library)
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EXTRA_DSO_LDOPTS += -Wl,-weak_library,$(DEPTH)/memory/replace/dummy/$(DLL_PREFIX)replace_malloc$(DLL_SUFFIX)
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endif
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endif
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ifeq (Android,$(OS_TARGET))
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SHARED_LIBRARY_LIBS += $(call EXPAND_LIBNAME_PATH,android,$(DEPTH)/other-licenses/android)
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endif
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ifeq (android, $(MOZ_WIDGET_TOOLKIT))
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# Add Android specific code
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EXTRA_DSO_LDOPTS += $(MOZ_ZLIB_LIBS)
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SHARED_LIBRARY_LIBS += $(call EXPAND_LIBNAME_PATH,android,../android)
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# To properly wrap jemalloc's pthread_atfork call.
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EXTRA_DSO_LDOPTS += -Wl,--wrap=pthread_atfork
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endif
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ifeq (gonk, $(MOZ_WIDGET_TOOLKIT))
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CSRCS += cpuacct.c
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endif
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ifdef MOZ_LINKER
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# Add custom dynamic linker
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SHARED_LIBRARY_LIBS += $(call EXPAND_LIBNAME_PATH,linker,../linker)
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ifeq (arm, $(TARGET_CPU))
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EXTRA_DSO_LDOPTS += -Wl,-version-script,$(srcdir)/arm-eabi-filter
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endif
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endif
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SHARED_LIBRARY_LIBS += $(call EXPAND_LIBNAME_PATH,mfbt,$(DEPTH)/mfbt)
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ifeq (Android, $(OS_TARGET))
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WRAP_LDFLAGS := $(filter -Wl%,$(WRAP_LDFLAGS))
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endif
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include $(topsrcdir)/config/rules.mk
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ifdef MOZ_MEMORY
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ifeq (WINNT,$(OS_TARGET))
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# Roll our own custom logic here for the import library
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###############################################################################
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#
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# Linking Mozilla itself to jemalloc is not particularly difficult. To do this
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# we avoid linking directly to the Microsoft-provided CRT import libraries.
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# Instead, we link to our own import library which we generate here. To
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# replace the CRT's malloc/free/other memory management symbols we export
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# our own versions out of jemalloc.dll. We then take the import library that
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# the compiler generates for jemalloc.dll and combine it with the MS CRT import
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# libraries. We put our library on the command line first, and the CRT symbols
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# are discarded in favor of our versions!
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#
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# Unfortunately that was too easy. The CRT import library is not a standard
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# import library that contains a list of symbols and whatnot. It also includes
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# object files that are linked into generated programs. One of these,
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# crtdll.obj is (as one might expect) linked into all DLLs that link against
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# the CRT. This file does things like run static C++ constructors when the
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# DLL is attached, call DllMain, etc.
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#
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# In the CRT source all malloc/free calls are made to malloc_crt and free_crt.
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# In debug builds these are both defined to malloc_dbg and free_dbg. In opt
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# builds malloc_crt is an actual function, implemented and exposed from the
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# CRT. free_crt is, however, defined to be just plain old free. This works
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# fine inside the CRT where malloc_crt and free operate on the same heap.
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# Outside the CRT malloc_crt is in the CRT's heap, but free is in jemalloc's
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# heap. This causes much pain at shutdown :-(
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#
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# The obvious solution here is to override malloc_crt too. Unfortunately,
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# that doesn't work because the CRT expects to be able to call msize on this
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# piece of memory deep inside the CRT, which will fail because it'll call the
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# CRT's msize on a pointer in jemalloc's heap.
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#
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# Our solution to this is quite devious. We take apart the CRT's import lib
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# and remove the problematic object file. We then poke at the object file's
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# symbol table and replace '__imp__free' (which means grab free from some
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# other DLL) with '__imp__frex'. Then we define our own dummy no-op function
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# in jemalloc.dll and export it as frex. Then we put the CRT import lib
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# back together with the patched crtdll.obj, glue it to the end of jemalloc's
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# import library and link the rest of Mozilla to that.
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#
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# The result? A binary that uses jemalloc, doesn't crash, and leaks a tiny
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# amount of memory (32 words per DLL in the 2010 CRT) at shutdown.
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#
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###############################################################################
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libs:: mozcrt.lib
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$(INSTALL) $(IFLAGS2) mozcrt.lib $(DIST)/lib
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# And finally combine that with the jemalloc import library to get an import
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# library that has our malloc/free/etc and the CRT's everything else
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mozcrt.lib: $(IMPORT_LIBRARY) msvc_modified.lib
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lib -OUT:$@ $^
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# Put the fixed object file back in
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msvc_modified.lib: msvc_removed.lib crtdll_fixed.obj
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lib -OUT:$@ $^
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# Fix the object file
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crtdll_fixed.obj: crtdll.obj
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$(PYTHON) $(srcdir)/fixcrt.py
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# Find the path of crtdll.obj
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CRTDLL_FULLPATH=$(subst \,\\,$(shell lib -list msvc_combined.lib | grep crtdll\\.obj))
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# Remove the broken object file, only after we have extracted it
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msvc_removed.lib: msvc_combined.lib crtdll.obj
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lib -OUT:$@ msvc_combined.lib -REMOVE:$(CRTDLL_FULLPATH)
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# Extract the broken object file out of the combined library
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crtdll.obj: msvc_combined.lib
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lib -OUT:$@ $^ -EXTRACT:$(CRTDLL_FULLPATH)
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# Grab both CRT libraries and combine them into one library to simplify things
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msvc_combined.lib:
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lib -OUT:$@ $(WIN32_CRT_LIBS)
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endif
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endif # MOZ_MEMORY
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