crashpad/compat/BUILD.gn
Joshua Peraza 2afe6dc210 android/linux: Support modules with shared relros on Android
Add MemoryMap::Iterator to support different strategies for locating
the start of module mappings on Android and Linux.

Beginning with API 21, Bionic provides android_dlopen_ext() which
allows passing a file descriptor with an existing relro segment to the
loader. This means that the mapping containing the dynamic segment
could have a name, device, and inode which are different than the
other mappings for the module.

The revised strategy for Android at API 21+ is to search all mappings
in reverse order from they dynamic array mapping until a module is
parsed with the expected dynamic array address.

Linux and Android 20- continue to select mappings using the device,
inode, and file offsets of the mappings.

Bug: crashpad:268
Change-Id: I30e95e51cb6874c00875d2a9c57f1249877736d4
Reviewed-on: https://chromium-review.googlesource.com/c/1374375
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
2018-12-17 22:58:16 +00:00

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# Copyright 2015 The Crashpad Authors. All rights reserved.
#
# 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.
import("../build/crashpad_buildconfig.gni")
config("compat_config") {
include_dirs = []
if (crashpad_is_mac) {
include_dirs += [ "mac" ]
}
if (crashpad_is_linux || crashpad_is_android) {
include_dirs += [ "linux" ]
}
if (crashpad_is_android) {
include_dirs += [ "android" ]
}
if (crashpad_is_win) {
include_dirs += [ "win" ]
} else {
include_dirs += [ "non_win" ]
}
}
template("compat_target") {
if (crashpad_is_mac) {
# There are no sources to compile, which doesnt mix will with a
# static_library.
group(target_name) {
forward_variables_from(invoker, "*")
}
} else {
static_library(target_name) {
forward_variables_from(invoker, "*")
}
}
}
compat_target("compat") {
sources = []
if (crashpad_is_mac) {
sources += [
"mac/AvailabilityMacros.h",
"mac/kern/exc_resource.h",
"mac/mach-o/loader.h",
"mac/mach/mach.h",
"mac/sys/resource.h",
]
} else {
sources += [ "non_mac/mach/mach.h" ]
}
if (crashpad_is_linux || crashpad_is_android) {
sources += [
"linux/signal.h",
"linux/sys/ptrace.h",
"linux/sys/user.h",
]
}
if (crashpad_is_android) {
sources += [
"android/android/api-level.cc",
"android/android/api-level.h",
"android/dlfcn_internal.cc",
"android/dlfcn_internal.h",
"android/elf.h",
"android/linux/elf.h",
"android/linux/prctl.h",
"android/linux/ptrace.h",
"android/sched.h",
"android/sys/epoll.cc",
"android/sys/epoll.h",
"android/sys/mman.cc",
"android/sys/mman.h",
"android/sys/syscall.h",
"android/sys/user.h",
]
}
if (crashpad_is_win) {
sources += [
"win/getopt.h",
"win/strings.cc",
"win/strings.h",
"win/sys/types.h",
"win/time.cc",
"win/time.h",
"win/winbase.h",
"win/winnt.h",
"win/winternl.h",
]
} else {
sources += [
"non_win/dbghelp.h",
"non_win/minwinbase.h",
"non_win/timezoneapi.h",
"non_win/verrsrc.h",
"non_win/windows.h",
"non_win/winnt.h",
]
}
public_configs = [
":compat_config",
"..:crashpad_config",
]
deps = []
if (crashpad_is_win) {
deps += [ "../third_party/getopt" ]
}
}