Automatically generate private symbol name mangling macros.

Rather than using a manually maintained list of internal symbols to drive name mangling, add a compilation phase to automatically extract the list of internal symbols. This resolves #677.
2017-05-04 11:20:43 -07:00 · 2017-05-04 11:20:43 -07:00 · 909f0482e4
commit 909f0482e4
parent a4ae9707da
9 changed files with 239 additions and 671 deletions
--- a/.gitignore
+++ b/.gitignore
@ -1,5 +1,3 @@
-/*.gcov.*
-
 /bin/jemalloc-config
 /bin/jemalloc.sh
 /bin/jeprof
@ -24,6 +22,9 @@
 /include/jemalloc/internal/jemalloc_preamble.h
 /include/jemalloc/internal/jemalloc_internal_defs.h
 /include/jemalloc/internal/private_namespace.h
+/include/jemalloc/internal/private_namespace_jet.h
+/include/jemalloc/internal/private_symbols.awk
+/include/jemalloc/internal/private_symbols_jet.awk
 /include/jemalloc/internal/public_namespace.h
 /include/jemalloc/internal/public_symbols.txt
 /include/jemalloc/internal/public_unnamespace.h
@ -39,8 +40,7 @@
 /include/jemalloc/jemalloc_typedefs.h

 /src/*.[od]
-/src/*.gcda
-/src/*.gcno
+/src/*.sym

 /test/test.sh
 test/include/test/jemalloc_test.h
@ -49,33 +49,23 @@ test/include/test/jemalloc_test_defs.h
 /test/integration/[A-Za-z]*
 !/test/integration/[A-Za-z]*.*
 /test/integration/*.[od]
-/test/integration/*.gcda
-/test/integration/*.gcno
 /test/integration/*.out

 /test/integration/cpp/[A-Za-z]*
 !/test/integration/cpp/[A-Za-z]*.*
 /test/integration/cpp/*.[od]
-/test/integration/cpp/*.gcda
-/test/integration/cpp/*.gcno
 /test/integration/cpp/*.out

 /test/src/*.[od]
-/test/src/*.gcda
-/test/src/*.gcno

 /test/stress/[A-Za-z]*
 !/test/stress/[A-Za-z]*.*
 /test/stress/*.[od]
-/test/stress/*.gcda
-/test/stress/*.gcno
 /test/stress/*.out

 /test/unit/[A-Za-z]*
 !/test/unit/[A-Za-z]*.*
 /test/unit/*.[od]
-/test/unit/*.gcda
-/test/unit/*.gcno
 /test/unit/*.out

 /VERSION
--- a/Makefile.in
+++ b/Makefile.in
@ -68,6 +68,8 @@ TEST_LD_MODE = @TEST_LD_MODE@
 MKLIB = @MKLIB@
 AR = @AR@
 ARFLAGS = @ARFLAGS@
+DUMP_SYMS = @DUMP_SYMS@
+AWK := @AWK@
 CC_MM = @CC_MM@
 LM := @LM@
 INSTALL = @INSTALL@
@ -224,10 +226,15 @@ TESTS_STRESS := $(srcroot)test/stress/microbench.c

 TESTS := $(TESTS_UNIT) $(TESTS_INTEGRATION) $(TESTS_INTEGRATION_CPP) $(TESTS_STRESS)

+PRIVATE_NAMESPACE_HDRS := $(objroot)include/jemalloc/internal/private_namespace.h $(objroot)include/jemalloc/internal/private_namespace_jet.h
+C_SYM_OBJS := $(C_SRCS:$(srcroot)%.c=$(objroot)%.sym.$(O))
+C_SYMS := $(C_SRCS:$(srcroot)%.c=$(objroot)%.sym)
 C_OBJS := $(C_SRCS:$(srcroot)%.c=$(objroot)%.$(O))
 CPP_OBJS := $(CPP_SRCS:$(srcroot)%.cpp=$(objroot)%.$(O))
 C_PIC_OBJS := $(C_SRCS:$(srcroot)%.c=$(objroot)%.pic.$(O))
 CPP_PIC_OBJS := $(CPP_SRCS:$(srcroot)%.cpp=$(objroot)%.pic.$(O))
+C_JET_SYM_OBJS := $(C_SRCS:$(srcroot)%.c=$(objroot)%.jet.sym.$(O))
+C_JET_SYMS := $(C_SRCS:$(srcroot)%.c=$(objroot)%.jet.sym)
 C_JET_OBJS := $(C_SRCS:$(srcroot)%.c=$(objroot)%.jet.$(O))
 C_TESTLIB_UNIT_OBJS := $(C_TESTLIB_SRCS:$(srcroot)%.c=$(objroot)%.unit.$(O))
 C_TESTLIB_INTEGRATION_OBJS := $(C_TESTLIB_SRCS:$(srcroot)%.c=$(objroot)%.integration.$(O))
@ -268,24 +275,32 @@ build_doc: $(DOCS)
 # Include generated dependency files.
 #
 ifdef CC_MM
+-include $(C_SYM_OBJS:%.$(O)=%.d)
 -include $(C_OBJS:%.$(O)=%.d)
 -include $(CPP_OBJS:%.$(O)=%.d)
 -include $(C_PIC_OBJS:%.$(O)=%.d)
 -include $(CPP_PIC_OBJS:%.$(O)=%.d)
+-include $(C_JET_SYM_OBJS:%.$(O)=%.d)
 -include $(C_JET_OBJS:%.$(O)=%.d)
 -include $(C_TESTLIB_OBJS:%.$(O)=%.d)
 -include $(TESTS_OBJS:%.$(O)=%.d)
 -include $(TESTS_CPP_OBJS:%.$(O)=%.d)
 endif

+$(C_SYM_OBJS): $(objroot)src/%.sym.$(O): $(srcroot)src/%.c
+$(C_SYM_OBJS): CPPFLAGS += -DJEMALLOC_NO_PRIVATE_NAMESPACE
+$(C_SYMS): $(objroot)src/%.sym: $(objroot)src/%.sym.$(O)
 $(C_OBJS): $(objroot)src/%.$(O): $(srcroot)src/%.c
 $(CPP_OBJS): $(objroot)src/%.$(O): $(srcroot)src/%.cpp
 $(C_PIC_OBJS): $(objroot)src/%.pic.$(O): $(srcroot)src/%.c
 $(C_PIC_OBJS): CFLAGS += $(PIC_CFLAGS)
 $(CPP_PIC_OBJS): $(objroot)src/%.pic.$(O): $(srcroot)src/%.cpp
 $(CPP_PIC_OBJS): CXXFLAGS += $(PIC_CFLAGS)
+$(C_JET_SYM_OBJS): $(objroot)src/%.jet.sym.$(O): $(srcroot)src/%.c
+$(C_JET_SYM_OBJS): CPPFLAGS += -DJEMALLOC_JET -DJEMALLOC_NO_PRIVATE_NAMESPACE
+$(C_JET_SYMS): $(objroot)src/%.jet.sym: $(objroot)src/%.jet.sym.$(O)
 $(C_JET_OBJS): $(objroot)src/%.jet.$(O): $(srcroot)src/%.c
-$(C_JET_OBJS): CFLAGS += -DJEMALLOC_JET
+$(C_JET_OBJS): CPPFLAGS += -DJEMALLOC_JET
 $(C_TESTLIB_UNIT_OBJS): $(objroot)test/src/%.unit.$(O): $(srcroot)test/src/%.c
 $(C_TESTLIB_UNIT_OBJS): CPPFLAGS += -DJEMALLOC_UNIT_TEST
 $(C_TESTLIB_INTEGRATION_OBJS): $(objroot)test/src/%.integration.$(O): $(srcroot)test/src/%.c
@ -303,25 +318,42 @@ $(TESTS_CPP_OBJS): $(objroot)test/%.$(O): $(srcroot)test/%.cpp
 $(TESTS_OBJS): CPPFLAGS += -I$(srcroot)test/include -I$(objroot)test/include
 $(TESTS_CPP_OBJS): CPPFLAGS += -I$(srcroot)test/include -I$(objroot)test/include
 ifneq ($(IMPORTLIB),$(SO))
-$(CPP_OBJS) $(C_OBJS) $(C_JET_OBJS): CPPFLAGS += -DDLLEXPORT
+$(CPP_OBJS) $(C_SYM_OBJS) $(C_OBJS) $(C_JET_SYM_OBJS) $(C_JET_OBJS): CPPFLAGS += -DDLLEXPORT
 endif

-ifndef CC_MM
 # Dependencies.
+ifndef CC_MM
 HEADER_DIRS = $(srcroot)include/jemalloc/internal \
 	$(objroot)include/jemalloc $(objroot)include/jemalloc/internal
-HEADERS = $(wildcard $(foreach dir,$(HEADER_DIRS),$(dir)/*.h))
-$(C_OBJS) $(CPP_OBJS) $(C_PIC_OBJS) $(CPP_PIC_OBJS) $(C_JET_OBJS) $(C_TESTLIB_OBJS) $(TESTS_OBJS): $(HEADERS)
+HEADERS = $(filter-out $(PRIVATE_NAMESPACE_HDRS),$(wildcard $(foreach dir,$(HEADER_DIRS),$(dir)/*.h)))
+$(C_SYM_OBJS) $(C_OBJS) $(CPP_OBJS) $(C_PIC_OBJS) $(CPP_PIC_OBJS) $(C_JET_SYM_OBJS) $(C_JET_OBJS) $(C_TESTLIB_OBJS) $(TESTS_OBJS) $(TESTS_CPP_OBJS): $(HEADERS)
 $(TESTS_OBJS) $(TESTS_CPP_OBJS): $(objroot)test/include/test/jemalloc_test.h
 endif

-$(C_OBJS) $(C_PIC_OBJS) $(C_JET_OBJS) $(C_TESTLIB_OBJS) $(TESTS_OBJS): %.$(O):
+$(C_OBJS) $(CPP_OBJS) $(C_PIC_OBJS) $(CPP_PIC_OBJS) $(C_TESTLIB_INTEGRATION_OBJS) $(C_UTIL_INTEGRATION_OBJS) $(TESTS_INTEGRATION_OBJS) $(TESTS_INTEGRATION_CPP_OBJS): $(objroot)include/jemalloc/internal/private_namespace.h
+$(C_JET_OBJS) $(C_TESTLIB_UNIT_OBJS) $(C_TESTLIB_STRESS_OBJS) $(TESTS_UNIT_OBJS) $(TESTS_STRESS_OBJS): $(objroot)include/jemalloc/internal/private_namespace_jet.h
+
+$(C_SYM_OBJS) $(C_OBJS) $(C_PIC_OBJS) $(C_JET_SYM_OBJS) $(C_JET_OBJS) $(C_TESTLIB_OBJS) $(TESTS_OBJS): %.$(O):
 	@mkdir -p $(@D)
 	$(CC) $(CFLAGS) -c $(CPPFLAGS) $(CTARGET) $<
 ifdef CC_MM
 	@$(CC) -MM $(CPPFLAGS) -MT $@ -o $(@:%.$(O)=%.d) $<
 endif

+$(C_SYMS): %.sym:
+	@mkdir -p $(@D)
+	$(DUMP_SYMS) $< | $(AWK) -f $(objroot)include/jemalloc/internal/private_symbols.awk > $@
+
+$(C_JET_SYMS): %.sym:
+	@mkdir -p $(@D)
+	$(DUMP_SYMS) $< | $(AWK) -f $(objroot)include/jemalloc/internal/private_symbols_jet.awk > $@
+
+$(objroot)include/jemalloc/internal/private_namespace.h: $(C_SYMS)
+	$(SHELL) $(objdir)include/jemalloc/internal/private_namespace.sh $^ > $@
+
+$(objroot)include/jemalloc/internal/private_namespace_jet.h: $(C_JET_SYMS)
+	$(SHELL) $(objdir)include/jemalloc/internal/private_namespace.sh $^ > $@
+
 $(CPP_OBJS) $(CPP_PIC_OBJS) $(TESTS_CPP_OBJS): %.$(O):
 	@mkdir -p $(@D)
 	$(CXX) $(CXXFLAGS) -c $(CPPFLAGS) $(CTARGET) $<
@ -347,7 +379,7 @@ $(STATIC_LIBS):
 	@mkdir -p $(@D)
 	$(AR) $(ARFLAGS)@AROUT@ $+

-$(objroot)test/unit/%$(EXE): $(objroot)test/unit/%.$(O) $(TESTS_UNIT_LINK_OBJS) $(C_JET_OBJS) $(C_TESTLIB_UNIT_OBJS)
+$(objroot)test/unit/%$(EXE): $(objroot)test/unit/%.$(O) $(C_JET_OBJS) $(C_TESTLIB_UNIT_OBJS)
 	@mkdir -p $(@D)
 	$(CC) $(LDTARGET) $(filter %.$(O),$^) $(call RPATH,$(objroot)lib) $(LDFLAGS) $(filter-out -lm,$(LIBS)) $(LM) $(EXTRA_LDFLAGS)

@ -452,16 +484,23 @@ stress: tests_stress stress_dir
 check: check_unit check_integration check_integration_decay check_integration_prof

 clean:
+	rm -f $(PRIVATE_NAMESPACE_HDRS)
+	rm -f $(C_SYM_OBJS)
+	rm -f $(C_SYMS)
 	rm -f $(C_OBJS)
 	rm -f $(CPP_OBJS)
 	rm -f $(C_PIC_OBJS)
 	rm -f $(CPP_PIC_OBJS)
+	rm -f $(C_JET_SYM_OBJS)
+	rm -f $(C_JET_SYMS)
 	rm -f $(C_JET_OBJS)
 	rm -f $(C_TESTLIB_OBJS)
+	rm -f $(C_SYM_OBJS:%.$(O)=%.d)
 	rm -f $(C_OBJS:%.$(O)=%.d)
 	rm -f $(CPP_OBJS:%.$(O)=%.d)
 	rm -f $(C_PIC_OBJS:%.$(O)=%.d)
 	rm -f $(CPP_PIC_OBJS:%.$(O)=%.d)
+	rm -f $(C_JET_SYM_OBJS:%.$(O)=%.d)
 	rm -f $(C_JET_OBJS:%.$(O)=%.d)
 	rm -f $(C_TESTLIB_OBJS:%.$(O)=%.d)
 	rm -f $(TESTS_OBJS:%.$(O)=%$(EXE))
--- a/configure.ac
+++ b/configure.ac
@ -510,6 +510,8 @@ AN_PROGRAM([ar], [AC_PROG_AR])
 AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL(AR, ar, :)])
 AC_PROG_AR

+AC_PROG_AWK
+
 dnl Platform-specific settings.  abi and RPATH can probably be determined
 dnl programmatically, but doing so is error-prone, which makes it generally
 dnl not worth the trouble.
@ -519,6 +521,8 @@ dnl definitions need to be seen before any headers are included, which is a pain
 dnl to make happen otherwise.
 default_retain="0"
 maps_coalesce="1"
+DUMP_SYMS="nm -a"
+SYM_PREFIX=""
 case "${host}" in
  *-*-darwin* | *-*-ios*)
 	abi="macho"
@ -530,6 +534,7 @@ case "${host}" in
 	DSO_LDFLAGS='-shared -Wl,-install_name,$(LIBDIR)/$(@F)'
 	SOREV="${rev}.${so}"
 	sbrk_deprecated="1"
+	SYM_PREFIX="_"
 	;;
  *-*-freebsd*)
 	abi="elf"
@ -624,6 +629,7 @@ case "${host}" in
 	  DSO_LDFLAGS="-shared"
 	  link_whole_archive="1"
 	fi
+	DUMP_SYMS="dumpbin /SYMBOLS"
 	a="lib"
 	libprefix=""
 	SOREV="${so}"
@ -671,6 +677,7 @@ AC_SUBST([TEST_LD_MODE])
 AC_SUBST([MKLIB])
 AC_SUBST([ARFLAGS])
 AC_SUBST([AROUT])
+AC_SUBST([DUMP_SYMS])
 AC_SUBST([CC_MM])

 dnl Determine whether libm must be linked to use e.g. log(3).
@ -773,16 +780,6 @@ AC_PROG_RANLIB
 AC_PATH_PROG([LD], [ld], [false], [$PATH])
 AC_PATH_PROG([AUTOCONF], [autoconf], [false], [$PATH])

-public_syms="malloc_conf malloc_message malloc calloc posix_memalign aligned_alloc realloc free mallocx rallocx xallocx sallocx dallocx sdallocx nallocx mallctl mallctlnametomib mallctlbymib malloc_stats_print malloc_usable_size"
-
-dnl Check for allocator-related functions that should be wrapped.
-AC_CHECK_FUNC([memalign],
-	      [AC_DEFINE([JEMALLOC_OVERRIDE_MEMALIGN], [ ])
-	       public_syms="${public_syms} memalign"])
-AC_CHECK_FUNC([valloc],
-	      [AC_DEFINE([JEMALLOC_OVERRIDE_VALLOC], [ ])
-	       public_syms="${public_syms} valloc"])
-
 dnl Perform no name mangling by default.
 AC_ARG_WITH([mangling],
  [AS_HELP_STRING([--with-mangling=<map>], [Mangle symbols in <map>])],
@ -814,6 +811,49 @@ AC_ARG_WITH([export],
 fi]
 )

+public_syms="aligned_alloc calloc dallocx free mallctl mallctlbymib mallctlnametomib malloc malloc_conf malloc_message malloc_stats_print malloc_usable_size mallocx nallocx posix_memalign rallocx realloc sallocx sdallocx xallocx"
+dnl Check for additional platform-specific public API functions.
+AC_CHECK_FUNC([memalign],
+	      [AC_DEFINE([JEMALLOC_OVERRIDE_MEMALIGN], [ ])
+	       public_syms="${public_syms} memalign"])
+AC_CHECK_FUNC([valloc],
+	      [AC_DEFINE([JEMALLOC_OVERRIDE_VALLOC], [ ])
+	       public_syms="${public_syms} valloc"])
+
+dnl Check for allocator-related functions that should be wrapped.
+wrap_syms=
+if test "x${JEMALLOC_PREFIX}" = "x" ; then
+  AC_CHECK_FUNC([__libc_calloc],
+		[AC_DEFINE([JEMALLOC_OVERRIDE___LIBC_CALLOC], [ ])
+		 wrap_syms="${wrap_syms} __libc_calloc"])
+  AC_CHECK_FUNC([__libc_free],
+		[AC_DEFINE([JEMALLOC_OVERRIDE___LIBC_FREE], [ ])
+		 wrap_syms="${wrap_syms} __libc_free"])
+  AC_CHECK_FUNC([__libc_malloc],
+		[AC_DEFINE([JEMALLOC_OVERRIDE___LIBC_MALLOC], [ ])
+		 wrap_syms="${wrap_syms} __libc_malloc"])
+  AC_CHECK_FUNC([__libc_memalign],
+		[AC_DEFINE([JEMALLOC_OVERRIDE___LIBC_MEMALIGN], [ ])
+		 wrap_syms="${wrap_syms} __libc_memalign"])
+  AC_CHECK_FUNC([__libc_realloc],
+		[AC_DEFINE([JEMALLOC_OVERRIDE___LIBC_REALLOC], [ ])
+		 wrap_syms="${wrap_syms} __libc_realloc"])
+  AC_CHECK_FUNC([__libc_valloc],
+		[AC_DEFINE([JEMALLOC_OVERRIDE___LIBC_VALLOC], [ ])
+		 wrap_syms="${wrap_syms} __libc_valloc"])
+  AC_CHECK_FUNC([__posix_memalign],
+		[AC_DEFINE([JEMALLOC_OVERRIDE___POSIX_MEMALIGN], [ ])
+		 wrap_syms="${wrap_syms} __posix_memalign"])
+fi
+
+case "${host}" in
+  *-*-mingw* | *-*-cygwin*)
+    wrap_syms="${wrap_syms} tls_callback"
+    ;;
+  *)
+    ;;
+esac
+
 dnl Mangle library-private APIs.
 AC_ARG_WITH([private_namespace],
  [AS_HELP_STRING([--with-private-namespace=<prefix>], [Prefix to prepend to all library-private APIs])],
@ -885,8 +925,8 @@ cfgoutputs_tup="${cfgoutputs_tup} test/include/test/jemalloc_test.h:test/include

 cfghdrs_in="include/jemalloc/jemalloc_defs.h.in"
 cfghdrs_in="${cfghdrs_in} include/jemalloc/internal/jemalloc_internal_defs.h.in"
+cfghdrs_in="${cfghdrs_in} include/jemalloc/internal/private_symbols.sh"
 cfghdrs_in="${cfghdrs_in} include/jemalloc/internal/private_namespace.sh"
-cfghdrs_in="${cfghdrs_in} include/jemalloc/internal/private_symbols.txt"
 cfghdrs_in="${cfghdrs_in} include/jemalloc/internal/public_namespace.sh"
 cfghdrs_in="${cfghdrs_in} include/jemalloc/internal/public_unnamespace.sh"
 cfghdrs_in="${cfghdrs_in} include/jemalloc/internal/size_classes.sh"
@ -897,7 +937,8 @@ cfghdrs_in="${cfghdrs_in} test/include/test/jemalloc_test_defs.h.in"

 cfghdrs_out="include/jemalloc/jemalloc_defs.h"
 cfghdrs_out="${cfghdrs_out} include/jemalloc/jemalloc${install_suffix}.h"
-cfghdrs_out="${cfghdrs_out} include/jemalloc/internal/private_namespace.h"
+cfghdrs_out="${cfghdrs_out} include/jemalloc/internal/private_symbols.awk"
+cfghdrs_out="${cfghdrs_out} include/jemalloc/internal/private_symbols_jet.awk"
 cfghdrs_out="${cfghdrs_out} include/jemalloc/internal/public_symbols.txt"
 cfghdrs_out="${cfghdrs_out} include/jemalloc/internal/public_namespace.h"
 cfghdrs_out="${cfghdrs_out} include/jemalloc/internal/public_unnamespace.h"
@ -1541,6 +1582,7 @@ AC_CHECK_FUNC([_malloc_thread_cleanup],
             )
 if test "x$have__malloc_thread_cleanup" = "x1" ; then
  AC_DEFINE([JEMALLOC_MALLOC_THREAD_CLEANUP], [ ])
+  wrap_syms="${wrap_syms} _malloc_thread_cleanup"
  force_tls="1"
 fi

@ -1553,6 +1595,7 @@ AC_CHECK_FUNC([_pthread_mutex_init_calloc_cb],
             )
 if test "x$have__pthread_mutex_init_calloc_cb" = "x1" ; then
  AC_DEFINE([JEMALLOC_MUTEX_INIT_CB])
+  wrap_syms="${wrap_syms} _malloc_prefork _malloc_postfork"
 fi

 dnl Disable lazy locking by default.
@ -1588,6 +1631,7 @@ if test "x$enable_lazy_lock" = "x1" ; then
      ])
  fi
  AC_DEFINE([JEMALLOC_LAZY_LOCK], [ ])
+  wrap_syms="${wrap_syms} pthread_create"
 fi
 AC_SUBST([enable_lazy_lock])

@ -1870,7 +1914,10 @@ extern void *(* __realloc_hook)(void *ptr, size_t size);
  if (__free_hook && ptr) __free_hook(ptr);
 ], [je_cv_glibc_malloc_hook])
 if test "x${je_cv_glibc_malloc_hook}" = "xyes" ; then
+  if test "x${JEMALLOC_PREFIX}" = "x" ; then
    AC_DEFINE([JEMALLOC_GLIBC_MALLOC_HOOK], [ ])
+    wrap_syms="${wrap_syms} __free_hook __malloc_hook __realloc_hook"
+  fi
 fi

 JE_COMPILABLE([glibc memalign hook], [
@ -1882,7 +1929,10 @@ extern void *(* __memalign_hook)(size_t alignment, size_t size);
  if (__memalign_hook) ptr = __memalign_hook(16, 7);
 ], [je_cv_glibc_memalign_hook])
 if test "x${je_cv_glibc_memalign_hook}" = "xyes" ; then
+  if test "x${JEMALLOC_PREFIX}" = "x" ; then
    AC_DEFINE([JEMALLOC_GLIBC_MEMALIGN_HOOK], [ ])
+    wrap_syms="${wrap_syms} __memalign_hook"
+  fi
 fi

 JE_COMPILABLE([pthreads adaptive mutexes], [
@ -1904,13 +1954,6 @@ AC_HEADER_STDBOOL
 dnl ============================================================================
 dnl Define commands that generate output files.

-AC_CONFIG_COMMANDS([include/jemalloc/internal/private_namespace.h], [
-  mkdir -p "${objroot}include/jemalloc/internal"
-  "${srcdir}/include/jemalloc/internal/private_namespace.sh" "${srcdir}/include/jemalloc/internal/private_symbols.txt" > "${objroot}include/jemalloc/internal/private_namespace.h"
-], [
-  srcdir="${srcdir}"
-  objroot="${objroot}"
-])
 AC_CONFIG_COMMANDS([include/jemalloc/internal/public_symbols.txt], [
  f="${objroot}include/jemalloc/internal/public_symbols.txt"
  mkdir -p "${objroot}include/jemalloc/internal"
@ -1934,6 +1977,31 @@ AC_CONFIG_COMMANDS([include/jemalloc/internal/public_symbols.txt], [
  public_syms="${public_syms}"
  JEMALLOC_PREFIX="${JEMALLOC_PREFIX}"
 ])
+AC_CONFIG_COMMANDS([include/jemalloc/internal/private_symbols.awk], [
+  f="${objroot}include/jemalloc/internal/private_symbols.awk"
+  mkdir -p "${objroot}include/jemalloc/internal"
+  export_syms=`for sym in ${public_syms}; do echo "${JEMALLOC_PREFIX}${sym}"; done; for sym in ${wrap_syms}; do echo "${sym}"; done;`
+  "${srcdir}/include/jemalloc/internal/private_symbols.sh" "${SYM_PREFIX}" ${export_syms} > "${objroot}include/jemalloc/internal/private_symbols.awk"
+], [
+  srcdir="${srcdir}"
+  objroot="${objroot}"
+  public_syms="${public_syms}"
+  wrap_syms="${wrap_syms}"
+  SYM_PREFIX="${SYM_PREFIX}"
+  JEMALLOC_PREFIX="${JEMALLOC_PREFIX}"
+])
+AC_CONFIG_COMMANDS([include/jemalloc/internal/private_symbols_jet.awk], [
+  f="${objroot}include/jemalloc/internal/private_symbols_jet.awk"
+  mkdir -p "${objroot}include/jemalloc/internal"
+  export_syms=`for sym in ${public_syms}; do echo "jet_${sym}"; done; for sym in ${wrap_syms}; do echo "${sym}"; done;`
+  "${srcdir}/include/jemalloc/internal/private_symbols.sh" "${SYM_PREFIX}" ${export_syms} > "${objroot}include/jemalloc/internal/private_symbols_jet.awk"
+], [
+  srcdir="${srcdir}"
+  objroot="${objroot}"
+  public_syms="${public_syms}"
+  wrap_syms="${wrap_syms}"
+  SYM_PREFIX="${SYM_PREFIX}"
+])
 AC_CONFIG_COMMANDS([include/jemalloc/internal/public_namespace.h], [
  mkdir -p "${objroot}include/jemalloc/internal"
  "${srcdir}/include/jemalloc/internal/public_namespace.sh" "${objroot}include/jemalloc/internal/public_symbols.txt" > "${objroot}include/jemalloc/internal/public_namespace.h"
--- a/include/jemalloc/internal/jemalloc_internal_defs.h.in
+++ b/include/jemalloc/internal/jemalloc_internal_defs.h.in
@ -8,6 +8,18 @@
 #undef JEMALLOC_PREFIX
 #undef JEMALLOC_CPREFIX

+/*
+ * Define overrides for non-standard allocator-related functions if they are
+ * present on the system.
+ */
+#undef JEMALLOC_OVERRIDE___LIBC_CALLOC
+#undef JEMALLOC_OVERRIDE___LIBC_FREE
+#undef JEMALLOC_OVERRIDE___LIBC_MALLOC
+#undef JEMALLOC_OVERRIDE___LIBC_MEMALIGN
+#undef JEMALLOC_OVERRIDE___LIBC_REALLOC
+#undef JEMALLOC_OVERRIDE___LIBC_VALLOC
+#undef JEMALLOC_OVERRIDE___POSIX_MEMALIGN
+
 /*
 * JEMALLOC_PRIVATE_NAMESPACE is used as a prefix for all library-private APIs.
 * For shared libraries, symbol visibility mechanisms prevent these symbols
--- a/include/jemalloc/internal/jemalloc_preamble.h.in
+++ b/include/jemalloc/internal/jemalloc_preamble.h.in
@ -38,7 +38,13 @@
 * want the inclusion of hooks to happen early, so that we hook as much as
 * possible.
 */
+#ifndef JEMALLOC_NO_PRIVATE_NAMESPACE
+#  ifndef JEMALLOC_JET
 #    include "jemalloc/internal/private_namespace.h"
+#  else
+#    include "jemalloc/internal/private_namespace_jet.h"
+#  endif
+#endif
 #include "jemalloc/internal/hooks.h"

 static const bool config_debug =
--- a/include/jemalloc/internal/private_namespace.sh
+++ b/include/jemalloc/internal/private_namespace.sh
@ -1,5 +1,5 @@
 #!/bin/sh

-for symbol in `cat $1` ; do
+for symbol in `cat "$@"` ; do
  echo "#define ${symbol} JEMALLOC_N(${symbol})"
 done
--- a/include/jemalloc/internal/private_symbols.sh
+++ b/include/jemalloc/internal/private_symbols.sh
@ -0,0 +1,51 @@
+#!/bin/sh
+#
+# Generate private_symbols[_jet].awk.
+#
+# Usage: private_symbols.sh <sym_prefix> <sym>*
+#
+# <sym_prefix> is typically "" or "_".
+
+sym_prefix=$1
+shift
+
+cat <<EOF
+#!/usr/bin/env awk -f
+
+BEGIN {
+  sym_prefix = "${sym_prefix}"
+  split("\\
+EOF
+
+for public_sym in "$@" ; do
+  cat <<EOF
+        ${sym_prefix}${public_sym} \\
+EOF
+done
+
+cat <<"EOF"
+        ", exported_symbol_names)
+  # Store exported symbol names as keys in exported_symbols.
+  for (i in exported_symbol_names) {
+    exported_symbols[exported_symbol_names[i]] = 1
+  }
+}
+
+# Process 'nm -a <c_source.o>' output.
+#
+# Handle lines like:
+#   0000000000000008 D opt_junk
+#   0000000000007574 T malloc_initialized
+(NF == 3 && $2 ~ /^[ABCDGRSTVW]$/ && !($3 in exported_symbols) && $3 ~ /^[A-Za-z0-9_]+$/) {
+  print substr($3, 1+length(sym_prefix), length($3)-length(sym_prefix))
+}
+
+# Process 'dumpbin /SYMBOLS <c_source.obj>' output.
+#
+# Handle lines like:
+#   353 00008098 SECT4  notype       External     | opt_junk
+#   3F1 00000000 SECT7  notype ()    External     | malloc_initialized
+($3 ~ /^SECT[0-9]+/ && $(NF-2) == "External" && !($NF in exported_symbols)) {
+  print $NF
+}
+EOF
--- a/include/jemalloc/internal/private_symbols.txt
+++ b/include/jemalloc/internal/private_symbols.txt
@ -1,609 +0,0 @@
-a0dalloc
-a0malloc
-arena_aalloc
-arena_alloc_junk_small
-arena_basic_stats_merge
-arena_bin_index
-arena_bin_info
-arena_boot
-arena_choose
-arena_choose_hard
-arena_choose_impl
-arena_cleanup
-arena_dalloc
-arena_dalloc_bin_junked_locked
-arena_dalloc_junk_small
-arena_dalloc_no_tcache
-arena_dalloc_promoted
-arena_dalloc_small
-arena_decay
-arena_decay_tick
-arena_decay_ticks
-arena_dirty_decay_time_default_get
-arena_dirty_decay_time_default_set
-arena_dirty_decay_time_get
-arena_dirty_decay_time_set
-arena_muzzy_decay_time_default_get
-arena_muzzy_decay_time_default_set
-arena_muzzy_decay_time_get
-arena_muzzy_decay_time_set
-arena_destroy
-arena_dss_prec_get
-arena_dss_prec_set
-arena_extent_alloc_large
-arena_extent_dalloc_large_prep
-arena_extent_ralloc_large_expand
-arena_extent_ralloc_large_shrink
-arena_extent_sn_next
-arena_extents_dirty_dalloc
-arena_get
-arena_ichoose
-arena_ind_get
-arena_init
-arena_internal_add
-arena_internal_get
-arena_internal_sub
-arena_malloc
-arena_malloc_hard
-arena_migrate
-arena_new
-arena_nthreads_dec
-arena_nthreads_get
-arena_nthreads_inc
-arena_palloc
-arena_postfork_child
-arena_postfork_parent
-arena_prefork0
-arena_prefork1
-arena_prefork2
-arena_prefork3
-arena_prefork4
-arena_prefork5
-arena_prefork6
-arena_prof_accum
-arena_prof_promote
-arena_prof_tctx_get
-arena_prof_tctx_reset
-arena_prof_tctx_set
-arena_ralloc
-arena_ralloc_no_move
-arena_reset
-arena_salloc
-arena_sdalloc
-arena_sdalloc_no_tcache
-arena_set
-arena_slab_regind
-arena_stats_init
-arena_stats_mapped_add
-arena_stats_merge
-arena_tcache_fill_small
-arena_tdata_get
-arena_tdata_get_hard
-arena_vsalloc
-arenas
-arenas_tdata_cleanup
-b0get
-base_alloc
-base_boot
-base_delete
-base_extent_alloc
-base_extent_hooks_get
-base_extent_hooks_set
-base_ind_get
-base_new
-base_postfork_child
-base_postfork_parent
-base_prefork
-base_stats_get
-bitmap_ffu
-bitmap_full
-bitmap_get
-bitmap_info_init
-bitmap_init
-bitmap_set
-bitmap_sfu
-bitmap_size
-bitmap_unset
-bootstrap_calloc
-bootstrap_free
-bootstrap_malloc
-bt_init
-bt2gctx_mtx
-buferror
-ckh_count
-ckh_delete
-ckh_insert
-ckh_iter
-ckh_new
-ckh_pointer_hash
-ckh_pointer_keycomp
-ckh_remove
-ckh_search
-ckh_string_hash
-ckh_string_keycomp
-ctl_boot
-ctl_bymib
-ctl_byname
-ctl_nametomib
-ctl_postfork_child
-ctl_postfork_parent
-ctl_prefork
-decay_ticker_get
-dss_prec_names
-extent_ad_comp
-extent_addr_get
-extent_addr_randomize
-extent_addr_set
-extent_alloc
-extent_alloc_cache
-extent_alloc_dss
-extent_alloc_mmap
-extent_alloc_wrapper
-extent_arena_get
-extent_arena_set
-extent_base_get
-extent_before_get
-extent_boot
-extent_binit
-extent_bsize_get
-extent_bsize_set
-extent_commit_wrapper
-extent_committed_get
-extent_committed_set
-extent_dalloc
-extent_dalloc_gap
-extent_dalloc_mmap
-extent_dalloc_wrapper
-extent_decommit_wrapper
-extent_destroy_wrapper
-extent_dss_boot
-extent_dss_mergeable
-extent_dss_prec_get
-extent_dss_prec_set
-extent_ead_comp
-extent_esn_comp
-extent_esn_get
-extent_esn_set
-extent_esnead_comp
-extent_heap_empty
-extent_heap_first
-extent_heap_insert
-extent_heap_new
-extent_heap_remove
-extent_heap_remove_first
-extent_hooks_default
-extent_hooks_get
-extent_hooks_set
-extent_in_dss
-extent_init
-extent_last_get
-extent_list_append
-extent_list_first
-extent_list_init
-extent_list_last
-extent_list_remove
-extent_list_replace
-extent_merge_wrapper
-extent_nfree_dec
-extent_nfree_get
-extent_nfree_inc
-extent_nfree_set
-extent_past_get
-extent_prof_tctx_get
-extent_prof_tctx_set
-extent_purge_forced_wrapper
-extent_purge_lazy_wrapper
-extent_size_get
-extent_size_quantize_ceil
-extent_size_quantize_floor
-extent_size_set
-extent_slab_data_get
-extent_slab_data_get_const
-extent_slab_get
-extent_slab_set
-extent_sn_comp
-extent_sn_get
-extent_sn_set
-extent_snad_comp
-extent_split_wrapper
-extent_state_get
-extent_state_set
-extent_szind_get
-extent_szind_get_maybe_invalid
-extent_szind_set
-extent_usize_get
-extent_zeroed_get
-extent_zeroed_set
-extents_alloc
-extents_dalloc
-extents_evict
-extents_init
-extents_npages_get
-extents_prefork
-extents_postfork_child
-extents_postfork_parent
-extents_rtree
-extents_state_get
-ffs_llu
-ffs_lu
-ffs_u
-ffs_u32
-ffs_u64
-ffs_zu
-get_errno
-hash
-hash_fmix_32
-hash_fmix_64
-hash_get_block_32
-hash_get_block_64
-hash_rotl_32
-hash_rotl_64
-hash_x64_128
-hash_x86_128
-hash_x86_32
-hooks_arena_new_hook
-hooks_libc_hook
-iaalloc
-ialloc
-iallocztm
-iarena_cleanup
-idalloc
-idalloctm
-iealloc
-index2size
-index2size_compute
-index2size_lookup
-index2size_tab
-ipalloc
-ipalloct
-ipallocztm
-iralloc
-iralloct
-iralloct_realign
-isalloc
-isdalloct
-isthreaded
-ivsalloc
-ixalloc
-jemalloc_postfork_child
-jemalloc_postfork_parent
-jemalloc_prefork
-large_dalloc
-large_dalloc_finish
-large_dalloc_junk
-large_dalloc_maybe_junk
-large_dalloc_prep_junked_locked
-large_malloc
-large_palloc
-large_prof_tctx_get
-large_prof_tctx_reset
-large_prof_tctx_set
-large_ralloc
-large_ralloc_no_move
-large_salloc
-lg_floor
-lg_prof_sample
-malloc_cprintf
-malloc_getcpu
-malloc_initialized
-malloc_mutex_prof_data_reset
-malloc_mutex_assert_not_owner
-malloc_mutex_assert_owner
-malloc_mutex_boot
-malloc_mutex_init
-malloc_mutex_lock
-malloc_mutex_lock_final
-malloc_mutex_lock_slow
-malloc_mutex_postfork_child
-malloc_mutex_postfork_parent
-malloc_mutex_prefork
-malloc_mutex_trylock
-malloc_mutex_trylock_final
-malloc_mutex_unlock
-malloc_printf
-malloc_slow
-malloc_snprintf
-malloc_strtoumax
-malloc_tsd_boot0
-malloc_tsd_boot1
-malloc_tsd_cleanup_register
-malloc_tsd_dalloc
-malloc_tsd_malloc
-malloc_vcprintf
-malloc_vsnprintf
-malloc_write
-mutex_owner_stats_update
-narenas_auto
-narenas_total_get
-ncpus
-nhbins
-nstime_add
-nstime_compare
-nstime_copy
-nstime_divide
-nstime_idivide
-nstime_imultiply
-nstime_init
-nstime_init2
-nstime_monotonic
-nstime_msec
-nstime_ns
-nstime_nsec
-nstime_sec
-nstime_subtract
-nstime_update
-opt_abort
-opt_dirty_decay_time
-opt_muzzy_decay_time
-opt_dss
-opt_junk
-opt_junk_alloc
-opt_junk_free
-opt_lg_prof_interval
-opt_lg_prof_sample
-opt_lg_tcache_max
-opt_narenas
-opt_prof
-opt_prof_accum
-opt_prof_active
-opt_prof_final
-opt_prof_gdump
-opt_prof_leak
-opt_prof_prefix
-opt_prof_thread_active_init
-opt_stats_print
-opt_tcache
-opt_utrace
-opt_xmalloc
-opt_zero
-pages_boot
-pages_commit
-pages_decommit
-pages_huge
-pages_map
-pages_nohuge
-pages_purge_forced
-pages_purge_lazy
-pages_unmap
-percpu_arena_choose
-percpu_arena_ind_limit
-percpu_arena_update
-pind2sz
-pind2sz_compute
-pind2sz_lookup
-pind2sz_tab
-pow2_ceil_u32
-pow2_ceil_u64
-pow2_ceil_zu
-prng_lg_range_u32
-prng_lg_range_u64
-prng_lg_range_zu
-prng_range_u32
-prng_range_u64
-prng_range_zu
-prng_state_next_u32
-prng_state_next_u64
-prng_state_next_zu
-prof_accum_add
-prof_accum_cancel
-prof_accum_init
-prof_active
-prof_active_get
-prof_active_get_unlocked
-prof_active_set
-prof_alloc_prep
-prof_alloc_rollback
-prof_backtrace
-prof_boot0
-prof_boot1
-prof_boot2
-prof_bt_count
-prof_cnt_all
-prof_dump_header
-prof_dump_open
-prof_free
-prof_free_sampled_object
-prof_gdump
-prof_gdump_get
-prof_gdump_get_unlocked
-prof_gdump_set
-prof_gdump_val
-prof_idump
-prof_interval
-prof_lookup
-prof_malloc
-prof_malloc_sample_object
-prof_mdump
-prof_postfork_child
-prof_postfork_parent
-prof_prefork0
-prof_prefork1
-prof_realloc
-prof_reset
-prof_sample_accum_update
-prof_sample_threshold_update
-prof_tctx_get
-prof_tctx_reset
-prof_tctx_set
-prof_tdata_cleanup
-prof_tdata_count
-prof_tdata_get
-prof_tdata_init
-prof_tdata_reinit
-prof_thread_active_get
-prof_thread_active_init_get
-prof_thread_active_init_set
-prof_thread_active_set
-prof_thread_name_get
-prof_thread_name_set
-psz2ind
-psz2u
-rtree_clear
-rtree_ctx_data_init
-rtree_delete
-rtree_extent_read
-rtree_extent_szind_read
-rtree_leaf_alloc
-rtree_leaf_dalloc
-rtree_leaf_elm_acquire
-rtree_leaf_elm_bits_extent_get
-rtree_leaf_elm_bits_locked_get
-rtree_leaf_elm_bits_read
-rtree_leaf_elm_bits_slab_get
-rtree_leaf_elm_bits_szind_get
-rtree_leaf_elm_extent_read
-rtree_leaf_elm_extent_write
-rtree_leaf_elm_lookup
-rtree_leaf_elm_lookup_hard
-rtree_leaf_elm_release
-rtree_leaf_elm_slab_read
-rtree_leaf_elm_slab_write
-rtree_leaf_elm_szind_read
-rtree_leaf_elm_szind_slab_update
-rtree_leaf_elm_szind_write
-rtree_leaf_elm_witness_access
-rtree_leaf_elm_witness_acquire
-rtree_leaf_elm_witness_release
-rtree_leaf_elm_write
-rtree_leafkey
-rtree_new
-rtree_node_alloc
-rtree_node_dalloc
-rtree_read
-rtree_subkey
-rtree_szind_read
-rtree_szind_slab_read
-rtree_szind_slab_update
-rtree_write
-s2u
-s2u_compute
-s2u_lookup
-sa2u
-set_errno
-size2index
-size2index_compute
-size2index_lookup
-size2index_tab
-spin_adaptive
-stats_print
-tcache_alloc_easy
-tcache_alloc_large
-tcache_alloc_small
-tcache_alloc_small_hard
-tcache_arena_associate
-tcache_arena_reassociate
-tcache_bin_flush_large
-tcache_bin_flush_small
-tcache_bin_info
-tcache_boot
-tcache_cleanup
-tcache_create_explicit
-tcache_dalloc_large
-tcache_dalloc_small
-tcache_data_init
-tcache_enabled_get
-tcache_enabled_set
-tcache_event
-tcache_event_hard
-tcache_flush
-tcache_get
-tcache_maxclass
-tcache_prefork
-tcache_postfork_child
-tcache_postfork_parent
-tcache_salloc
-tcache_stats_merge
-tcaches
-tcaches_create
-tcaches_destroy
-tcaches_flush
-tcaches_get
-ticker_copy
-ticker_init
-ticker_read
-ticker_tick
-ticker_ticks
-tsd_arena_get
-tsd_arena_set
-tsd_arenap_get
-tsd_arenas_tdata_bypassp_get
-tsd_arenas_tdata_get
-tsd_arenas_tdata_set
-tsd_arenas_tdatap_get
-tsd_boot
-tsd_boot0
-tsd_boot1
-tsd_booted
-tsd_booted_get
-tsd_cleanup
-tsd_cleanup_wrapper
-tsd_fetch
-tsd_fetch_impl
-tsd_fetch_slow
-tsd_get
-tsd_get_allocates
-tsd_iarena_get
-tsd_iarena_set
-tsd_iarenap_get
-tsd_initialized
-tsd_init_check_recursion
-tsd_init_finish
-tsd_init_head
-tsd_narenas_tdata_get
-tsd_narenas_tdata_set
-tsd_narenas_tdatap_get
-tsd_reentrancy_level_get
-tsd_reentrancy_level_set
-tsd_reentrancy_levelp_get
-tsd_slow_update
-tsd_wrapper_get
-tsd_wrapper_set
-tsd_nominal
-tsd_prof_tdata_get
-tsd_prof_tdata_set
-tsd_prof_tdatap_get
-tsd_rtree_ctx
-tsd_rtree_ctxp_get
-tsd_rtree_leaf_elm_witnessesp_get
-tsd_set
-tsd_tcache_enabled_get
-tsd_tcache_enabled_set
-tsd_tcache_enabledp_get
-tsd_tcache_get
-tsd_tcache_set
-tsd_tcachep_get
-tsd_thread_allocated_get
-tsd_thread_allocated_set
-tsd_thread_allocatedp_get
-tsd_thread_deallocated_get
-tsd_thread_deallocated_set
-tsd_thread_deallocatedp_get
-tsd_tls
-tsd_tsd
-tsd_tsdn
-tsd_witness_fork_get
-tsd_witness_fork_set
-tsd_witness_forkp_get
-tsd_witnessesp_get
-tsdn_fetch
-tsdn_null
-tsdn_rtree_ctx
-tsdn_tsd
-witness_assert_depth
-witness_assert_depth_to_rank
-witness_assert_lockless
-witness_assert_not_owner
-witness_assert_owner
-witness_depth_error
-witness_init
-witness_lock
-witness_lock_error
-witness_not_owner_error
-witness_owner
-witness_owner_error
-witness_postfork_child
-witness_postfork_parent
-witness_prefork
-witness_unlock
-witnesses_cleanup
-zone_register
--- a/src/jemalloc.c
+++ b/src/jemalloc.c
@ -2313,19 +2313,30 @@ JEMALLOC_EXPORT void *(*__memalign_hook)(size_t alignment, size_t size) =
 #    define ALIAS(je_fn)	__attribute__((alias (#je_fn), used))
 /* To force macro expansion of je_ prefix before stringification. */
 #    define PREALIAS(je_fn)	ALIAS(je_fn)
-void	*__libc_malloc(size_t size) PREALIAS(je_malloc);
-void	__libc_free(void* ptr) PREALIAS(je_free);
-void	*__libc_realloc(void* ptr, size_t size) PREALIAS(je_realloc);
+#    ifdef JEMALLOC_OVERRIDE___LIBC_CALLOC
 void *__libc_calloc(size_t n, size_t size) PREALIAS(je_calloc);
+#    endif
+#    ifdef JEMALLOC_OVERRIDE___LIBC_FREE
+void __libc_free(void* ptr) PREALIAS(je_free);
+#    endif
+#    ifdef JEMALLOC_OVERRIDE___LIBC_MALLOC
+void *__libc_malloc(size_t size) PREALIAS(je_malloc);
+#    endif
+#    ifdef JEMALLOC_OVERRIDE___LIBC_MEMALIGN
 void *__libc_memalign(size_t align, size_t s) PREALIAS(je_memalign);
+#    endif
+#    ifdef JEMALLOC_OVERRIDE___LIBC_REALLOC
+void *__libc_realloc(void* ptr, size_t size) PREALIAS(je_realloc);
+#    endif
+#    ifdef JEMALLOC_OVERRIDE___LIBC_VALLOC
 void *__libc_valloc(size_t size) PREALIAS(je_valloc);
-int	__posix_memalign(void** r, size_t a, size_t s)
-    PREALIAS(je_posix_memalign);
+#    endif
+#    ifdef JEMALLOC_OVERRIDE___POSIX_MEMALIGN
+int __posix_memalign(void** r, size_t a, size_t s) PREALIAS(je_posix_memalign);
+#    endif
 #    undef PREALIAS
 #    undef ALIAS
-
 #  endif
-
 #endif

 /*