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platform_build
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Add a method to leave the symbol table in a library. 

When LOCAL_STRIP_MODULE := keep_symbols is set, then the normal strip rules
will be modified so that only the .debug_* sections are removed. The original
symbol table is left alone.

This allows the compilation of certain libraries so that libbacktrace library
can provide meaningful names to functions.

Bug: 12958251
Change-Id: I82bdc304a463012e29086325ccb51163464cb4a9
This commit is contained in:
Christopher Ferris 2014-03-18 14:50:09 -07:00
parent bce52ca5fa
commit a6e2f9322c
9 changed files with 52 additions and 38 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
core/combo/TARGET_linux-arm.mk
View File

@ -58,13 +58,9 @@ $(combo_2nd_arch_prefix)TARGET_CXX := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PRE
$(combo_2nd_arch_prefix)TARGET_AR := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_OBJCOPY := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_LD := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_READELF := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)readelf$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_STRIP := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX)
ifeq ($(TARGET_BUILD_VARIANT),user)
$(combo_2nd_arch_prefix)TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@
else
$(combo_2nd_arch_prefix)TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@ && \
$(PRIVATE_OBJCOPY) --add-gnu-debuglink=$< $@
endif
include $(BUILD_SYSTEM)/strip.mk
$(combo_2nd_arch_prefix)TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined

8
core/combo/TARGET_linux-arm64.mk
View File

@ -60,13 +60,9 @@ TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX)
TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
TARGET_READELF := $(TARGET_TOOLS_PREFIX)readelf$(HOST_EXECUTABLE_SUFFIX)
TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX)
ifeq ($(TARGET_BUILD_VARIANT),user)
TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@
else
TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@ && \
$(PRIVATE_OBJCOPY) --add-gnu-debuglink=$< $@
endif
include $(BUILD_SYSTEM)/strip.mk
TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined

8
core/combo/TARGET_linux-mips.mk
View File

@ -58,13 +58,9 @@ $(combo_2nd_arch_prefix)TARGET_CXX := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PRE
$(combo_2nd_arch_prefix)TARGET_AR := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_OBJCOPY := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_LD := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_READELF := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)readelf$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_STRIP := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX)
ifeq ($(TARGET_BUILD_VARIANT),user)
$(combo_2nd_arch_prefix)TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@
else
$(combo_2nd_arch_prefix)TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@ && \
$(PRIVATE_OBJCOPY) --add-gnu-debuglink=$< $@
endif
include $(BUILD_SYSTEM)/strip.mk
$(combo_2nd_arch_prefix)TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined

8
core/combo/TARGET_linux-mips64.mk
View File

@ -63,13 +63,9 @@ TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX)
TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
TARGET_READELF := $(TARGET_TOOLS_PREFIX)readelf$(HOST_EXECUTABLE_SUFFIX)
TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX)
ifeq ($(TARGET_BUILD_VARIANT),user)
TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-all $< -o $@
else
TARGET_STRIP_COMMAND = $(TARGET_STRIP) --strip-all $< -o $@ && \
$(TARGET_OBJCOPY) --add-gnu-debuglink=$< $@
endif
include $(BUILD_SYSTEM)/strip.mk
TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined

9
core/combo/TARGET_linux-x86.mk
View File

@ -51,14 +51,9 @@ $(combo_2nd_arch_prefix)TARGET_CXX := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PRE
$(combo_2nd_arch_prefix)TARGET_AR := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_OBJCOPY := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_LD := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_READELF := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)readelf$(HOST_EXECUTABLE_SUFFIX)
$(combo_2nd_arch_prefix)TARGET_STRIP := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX)
ifeq ($(TARGET_BUILD_VARIANT),user)
$(combo_2nd_arch_prefix)TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@
else
$(combo_2nd_arch_prefix)TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@ && \
$(PRIVATE_OBJCOPY) --add-gnu-debuglink=$< $@
endif
include $(BUILD_SYSTEM)/strip.mk
ifneq ($(wildcard $($(combo_2nd_arch_prefix)TARGET_CC)),)
$(combo_2nd_arch_prefix)TARGET_LIBGCC := \

9
core/combo/TARGET_linux-x86_64.mk
View File

@ -53,14 +53,9 @@ TARGET_CXX := $(TARGET_TOOLS_PREFIX)g++$(HOST_EXECUTABLE_SUFFIX)
TARGET_AR := $(TARGET_TOOLS_PREFIX)ar$(HOST_EXECUTABLE_SUFFIX)
TARGET_OBJCOPY := $(TARGET_TOOLS_PREFIX)objcopy$(HOST_EXECUTABLE_SUFFIX)
TARGET_LD := $(TARGET_TOOLS_PREFIX)ld$(HOST_EXECUTABLE_SUFFIX)
TARGET_READELF := $(TARGET_TOOLS_PREFIX)readelf$(HOST_EXECUTABLE_SUFFIX)
TARGET_STRIP := $(TARGET_TOOLS_PREFIX)strip$(HOST_EXECUTABLE_SUFFIX)
ifeq ($(TARGET_BUILD_VARIANT),user)
TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@
else
TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@ && \
$(PRIVATE_OBJCOPY) --add-gnu-debuglink=$< $@
endif
include $(BUILD_SYSTEM)/strip.mk
ifneq ($(wildcard $(TARGET_CC)),)
TARGET_LIBGCC := \

6
core/definitions.mk
View File

@ -1327,6 +1327,12 @@ define transform-to-stripped
$(hide) $($(PRIVATE_2ND_ARCH_VAR_PREFIX)TARGET_STRIP_COMMAND)
endef
define transform-to-stripped-keep-symbols
@mkdir -p $(dir $@)
@echo "target Strip (keep symbols): $(PRIVATE_MODULE) ($@)"
$(hide) $($(PRIVATE_2ND_ARCH_VAR_PREFIX)TARGET_STRIP_KEEP_SYMBOLS_COMMAND)
endef
###########################################################
## Commands for running gcc to link an executable

9
core/dynamic_binary.mk
View File

@ -116,6 +116,14 @@ $(strip_output): PRIVATE_OBJCOPY := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_OBJCOPY
$(strip_output): $(strip_input) | $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_STRIP)
$(transform-to-stripped)
else
ifeq ($(my_strip_module),keep_symbols)
# Strip only the debug frames, but leave the symbol table.
$(strip_output): PRIVATE_STRIP := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_STRIP)
$(strip_output): PRIVATE_OBJCOPY := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_OBJCOPY)
$(strip_output): PRIVATE_READELF := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_READELF)
$(strip_output): $(strip_input) | $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_STRIP)
$(transform-to-stripped-keep-symbols)
else
# Don't strip the binary, just copy it. We can't skip this step
# because a copy of the binary must appear at LOCAL_BUILT_MODULE.
#
@ -130,6 +138,7 @@ $(strip_output): $(strip_input)
@echo "target Unstripped: $(PRIVATE_MODULE) ($@)"
$(copy-file-to-target-with-cp)
endif
endif
endif # my_strip_module

25
core/strip.mk Normal file
View File

@ -0,0 +1,25 @@
#
# Copyright (C) 2014 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
ifneq ($(TARGET_BUILD_VARIANT),user)
TARGET_STRIP_EXTRA = && $(PRIVATE_OBJCOPY) --add-gnu-debuglink=$< $@
TARGET_STRIP_KEEP_SYMBOLS_EXTRA = --add-gnu-debuglink=$<
endif
$(combo_2nd_arch_prefix)TARGET_STRIP_COMMAND = $(PRIVATE_STRIP) --strip-all $< -o $@ $(TARGET_STRIP_EXTRA)
$(combo_2nd_arch_prefix)TARGET_STRIP_KEEP_SYMBOLS_COMMAND = \
$(PRIVATE_OBJCOPY) \
`$(PRIVATE_READELF) -S $< | awk '/.debug_/ {print "-R " $$2}' | xargs` \
$(TARGET_STRIP_KEEP_SYMBOLS_EXTRA) $< $@