`dlsym` on Android KitKat (4.4.*) raises SIGFPE when searching for
non-existent symbols. This wrapper installs a signal handler prior to
calling `dlsym`.
Bug: crashpad:30
Change-Id: Iee94672d3c11b1fad1b01526eea7df688c0356cb
Reviewed-on: https://chromium-review.googlesource.com/835411
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
With a companion mini_chromium change at https://crrev.com/c/841203,
it’s possible to configure via “gn args” as follows:
android_ndk = "/android/android-ndk-r16"
target_cpu = "x86_64"
target_os = "android"
Note that a standalone toolchain is not required.
Bug: crashpad:30, crashpad:79
Change-Id: Ica55bdcb82c730909c05dd9fecb40a74eca78c8a
Reviewed-on: https://chromium-review.googlesource.com/841286
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
This is sufficient for a native Linux build using GN. Android is not yet
supported.
mini_chromium side: https://crrev.com/c/833407
This also updates mini_chromium to 404f6dbf9928.
c913ef97a236 gn, linux: Build for Linux with GN
404f6dbf9928 gn: Don’t use .rsp files; rationalize descriptions and
output dirs
Bug: crashpad:79
Change-Id: I4f3b72fd02884d77812e520fb95231b35815677d
Reviewed-on: https://chromium-review.googlesource.com/833408
Commit-Queue: Mark Mentovai <mark@chromium.org>
Reviewed-by: Scott Graham <scottmg@chromium.org>
These are present on 10.7 and later, and were only provided for the
benefit of older systems that probably aren’t relevant to Crashpad any
longer.
Change-Id: If9d7222f7af05020d0ff57d5d9ed06355fa14a48
Reviewed-on: https://chromium-review.googlesource.com/827686
Commit-Queue: Mark Mentovai <mark@chromium.org>
Reviewed-by: Scott Graham <scottmg@chromium.org>
Although API 21 introduced support for 64-bit off_t in many system calls
or their wrappers, <stdio.h> support for 64-bit off_t is absent until
API 24.
This is a partial revert of 5969d6b1eb22, because with this more
targeted fix applying only to gtest, the rest of Crashpad will work with
a 64-bit off_t even at API levels lacking NDK support by going through
the mmap() shim in compat.
This includes a mini_chromium update to 96e32dd499a4.
85cbec19ffc0 fuchsia: Make EINTR macros no-ops
fbf410cd4d40 fuchsia: Use koid instead of getpid() for process field in
logging
96e32dd499a4 Revert "android: Don’t use _FILE_OFFSET_BITS=64 until API
21"
Bug: crashpad:211
Change-Id: I34c3c8b42eb315605e6775962b44c3c4573b7462
Reviewed-on: https://chromium-review.googlesource.com/811204
Commit-Queue: Mark Mentovai <mark@chromium.org>
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
This updates build/gyp_crashpad_android.py to define the
android_api_level GYP variable whenver unified headers are in use.
Previously, it was only set when compiling with GCC and using unified
headers. This pairs with https://crrev.com/c/804574 to allow proper
detection of when _FILE_OFFSET_BITS=64 would be inappropriate.
Since there’s no longer any possibility of using a 64-bit off_t with API
< 21, this also drops the compatibility wrapper for mmap() that allowed
this configuration to work. Too bad, I liked this, but it’s pointless to
carry now.
The development documentation is also updated to refer to NDK r16.
mini_chromium is updated to 88e056258a01450b07414642fa5fb98493c1f6ce.
f609089390cd fuchsia: Add ZX_LOG, et al. to mini_chromium
0a8c5de30c67 fuchsia: Fix RandBytes() ZX_CHECK message string
88e056258a01 android: Don’t use _FILE_OFFSET_BITS=64 until API 21
Change-Id: I932116e0c01bcddd5719f9091a070d504eae600f
Reviewed-on: https://chromium-review.googlesource.com/804555
Commit-Queue: Mark Mentovai <mark@chromium.org>
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
When I redid the Crashpad GN build a few weeks ago
(https://chromium-review.googlesource.com/c/chromium/src/+/751403), I
tried to order things according to the GN style guide
(https://chromium.googlesource.com/chromium/src/tools/gn/+/HEAD/docs/style_guide.md).
As for conditionals, I tried to stick to doing a set of conditionals
after “sources” for just “sources”, and then another one at the bottom
for everything else.
It turns out that this was a good idea because it’s an error to say
“deps += [something]” inside a conditional until you’ve already said
“deps = [something_else]” first. (Maybe that’s why I did it.)
9465fc72ad90 regressed this.
2bb56fafe3bd also left behind a couple of straggler paths that were
absolute to Chromium’s root but should have been made relative.
This also fixes a comment (about something that won’t yet work outside
of Chromium anyway, but still…)
Bug: crashpad:79
Change-Id: I8a6f84bfad368cbcdae4fbff11f1d00e2af14b93
Reviewed-on: https://chromium-review.googlesource.com/798172
Commit-Queue: Mark Mentovai <mark@chromium.org>
Reviewed-by: Scott Graham <scottmg@chromium.org>
- Adds a .gn and a build/BUILDCONFIG.gn that uses mini_chromium's
build/BUILD.gn.
- Adds some stub BUILD.gn files in locations where Chromium expects them
(in //build, //testing, //third_party) containing empty targets/configs.
These are no-ops in standalone builds, but add functionality when
building in Chromium. This is in preference to having a global bool
that conditionally does Chromium-y things in the Crashpad build files.
These stub files are all contained in a secondary source root in
build/chromium_compatibility, referred to by //.gn.
- Adds //base/BUILD.gn which forwards to mini_chromium/base. This is
only used when building standalone so that both Chromium and Crashpad
can refer to it as "//base".
- Changes references to other Crashpad targets to be relatively
specified so that they work when the root of the project is //, and also
when it's //third_party/crashpad/crashpad as it is in Chromium.
- Moves any error-causing Mac/Win-specific files into explicit if (is_mac)
or if (is_win) blocks as part of removing the dependency on
set_sources_assignment_filter().
As yet unresolved:
- CRASHPAD_IN_CHROMIUM needs to be removed when standalone; to be tackled
in a follow up.
- Not sure what to do with zlib yet, the build file currently assumes
"in Chromium" too, and similarly having Crashpad //third_party/zlib:zlib
pointing at itself doesn't work.
Bug: crashpad:79
Change-Id: I6a7dda214e4b3b14a60c1ed285267ab97432a1a8
Reviewed-on: https://chromium-review.googlesource.com/777410
Reviewed-by: Mark Mentovai <mark@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Commit-Queue: Scott Graham <scottmg@chromium.org>
Change-Id: I4b247d7fae1a212350f8ffcf2bf5ba1fa730f5c1
Reviewed-on: https://chromium-review.googlesource.com/780339
Reviewed-by: Scott Graham <scottmg@chromium.org>
Commit-Queue: Mark Mentovai <mark@chromium.org>
Unreferenced, and not working at all in Crashpad-standalone.
Copied from Chromium at 52a9831d81f2099ef9f50fcdaca5853019262c35 to have
a point where a roll back into Chromium should be a no-op (with Chromium's
build/secondary/third_party/crashpad/... removed).
I'm not sure what we want to do about the various gni references into
Chromium (e.g. //build/config/sanitizers/sanitizers.gni, //testing/test.gni,
etc.) but I guess the sooner they live in Crashpad rather than in Chromium
the sooner we can figure out the sort of knobs and dials we need.
Bug: crashpad:79
Change-Id: Id99c29123bcd4174ee2bcc128c2be87e3c94fa3f
Reviewed-on: https://chromium-review.googlesource.com/777819
Reviewed-by: Mark Mentovai <mark@chromium.org>
Commit-Queue: Scott Graham <scottmg@chromium.org>
glibc’s own <sys/ptrace.h> should provide this but doesn’t. See
https://sourceware.org/bugzilla/show_bug.cgi?id=22433.
The copy in compat provided it when targeting x86-64 and using glibc.
util/linux/ptracer.cc uses it when targeting both 32-bit x86 and x86-64,
so the compat definition must be made to apply to 32-bit x86 too.
This also provides a #define using the same name as the constant, which
is what glibc’s <sys/ptrace.h> does for other constants.
Bug: crashpad:30
Change-Id: I5a0734a236d1c25398fb69e66f58dfe118658b68
Reviewed-on: https://chromium-review.googlesource.com/765257
Commit-Queue: Mark Mentovai <mark@chromium.org>
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
As mentioned at
https://chromium-review.googlesource.com/c/chromium/src/+/735820#message-e8b199498d8b850f2612c46648069d819dd47517,
the typical Windows behavior for symbolic links requires administrative
privileges.
Symbolic links are available to non-administrators in Windows 10.0.15063
and later (1703, Creators Update), provided that developer mode has been
enabled and SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE is passed to
CreateSymbolicLink(). See
https://blogs.windows.com/buildingapps/2016/12/02/symlinks-windows-10/.
This adds SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE to uses of
CreateSymbolicLink(), and creates test::CanCreateSymbolicLinks() to
determine whether symbolic link creation is possible. Tests that
exercise symbolic links are adapted to gate all symbolic link operations
on this test.
Test: crashpad_util_test DirectoryReader.*:Filesystem.*
Change-Id: I8250cadd974ffcc7abe32701a0d5bc487061baf0
Bug: crashpad:
Reviewed-on: https://chromium-review.googlesource.com/739472
Commit-Queue: Mark Mentovai <mark@chromium.org>
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Scott Graham <scottmg@chromium.org>
This corresponds to Windows 10 version 1709 (Fall Creators Update,
“Redstone 3”).
While compiling util/win/nt_internals.cc:
…\crashpad\crashpad\util\win\nt_internals.cc(22): error C2371: 'CLIENT_ID': redefinition; different basic types
c:\program files (x86)\windows kits\10\include\10.0.16299.0\um\winternl.h(83): note: see declaration of 'CLIENT_ID'
The CLIENT_ID structure, which should have been part of the SDK to begin
with, has been added. Provide a compatible definition in <winternl.h>.
Bug: chromium:773476
Change-Id: Iafc77f8cffd06d1194fc909bad587f1ffd1687a2
Reviewed-on: https://chromium-review.googlesource.com/711415
Reviewed-by: Leonard Mosescu <mosescu@chromium.org>
Commit-Queue: Mark Mentovai <mark@chromium.org>
Chrome (and therefore mini_chromium) has always built with
_FILE_OFFSET_BITS=64, which is intended to enable a 64-bit off_t even
for 32-bit programs. However, support was never present in Android with
NDK traditional headers.
The new NDK unified headers do recognize _FILE_OFFSET_BITS=64 and enable
a 64-bit off_t, along with corresponding functions and system call
wrappers. However, no mmap() wrapper supporting a 64-bit off_t for
32-bit programs was available prior to API 21 (Android 5.0 “Lollipop”),
so when targeting older API levels, NDK headers do not proivde an mmap()
declaration. This avoids silently truncating 64-bit off_t values to 32
bits. NDK r15b did make such an mmap() wrapper available
(https://android.googlesource.com/platform/bionic/+/785b249df024), and
it did silently truncate, but this was removed for r15c
(https://android.googlesource.com/platform/bionic/+/00fedf587917).
How should this work if _FILE_OFFSET_BITS is set to 64 and recent
unified headers are in use?
The strategy employed here is to provide an mmap() declaration in
compat, with a 64-bit off_t. That mmap() will call to Bionic’s mmap64()
wrapper if available (it’s available since Android 5.0 “Lollipop”). If
unavailable, it implements the same logic that mmap64() does directly,
which predominantly involves calling the __mmap2() system call. Bionic
has always provided wrappers for __mmap2().
Additional reading:
https://android.googlesource.com/platform/bionic/+/0bfcbaf4d069/docs/32-bit-abi.md#is-32_bit-1https://github.com/android-ndk/ndk/issues/442
Bug: crashpad:30
Change-Id: I98c10e2eda773cb6f3d9eb8db9b8bfde43c885e7
Reviewed-on: https://chromium-review.googlesource.com/705674
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
One more for Windows too: compat/win/sys/time.h.
Bug: crashpad:30
Change-Id: I1f11933a5937a65db10774d0710d44dc85f8586a
Reviewed-on: https://chromium-review.googlesource.com/705278
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
ProcessReader is responsible for collecting information needed to build
a snapshot of the target process, independent of the Snapshot
interface. This CL includes implementation and tests for collecting
thread information, but does not yet collect module information.
Bug: crashpad:30
Change-Id: I911f155c953129a5fa8c031e923c0de2bd740ce0
Reviewed-on: https://chromium-review.googlesource.com/488162
Reviewed-by: Mark Mentovai <mark@chromium.org>
Linux supports TLS on x86 by allocating slots in the GDT, accessible
via the system calls get/set_thread_area. This allows segment
registers (%gs on x86) to be used to quickly access the TLS.
Previously, we used PTRACE_GETREGSET with the NT_386_TLS regset. This
"register set" provides access to the subarray of the GDT used for TLS.
However, there are multiple slots provided and we don't know which one
is being used by the threading library for the current thread's TLS.
Previously, we were just using the first one, which worked for x86 on
64-bit kernels, but not 32-bit kernels. On 32-bit kernels, the first
slot ended up pointing to the TLS of the main thread.
The authoritative index of the current thread's TLS in the GDT is
given by bits 3-15 of %gs. However, this index cannot be used with
PTRACE_GETREGSET+NT386_TLS because we don't know the location of the
TLS slots in the GDT. PTRACE_GET_THREAD_AREA, however, accepts an
index from the start of the GDT similarly to get/set_thread_area.
Bug: crashpad:30
Change-Id: Ie6dfbdd088c6816fad409812a1a97037d4b38fd7
Reviewed-on: https://chromium-review.googlesource.com/575318
Reviewed-by: Mark Mentovai <mark@chromium.org>
Crashpad doesn’t use AVX-512, but when receiving replies to exceptions
forwarded to ReportCrash, may see buffers large enough to contain
AVX-512 thread state. This can result in messages like
“UniversalExceptionRaise: (ipc/rcv) msg too large (0x10004004)”.
I386_THREAD_STATE_MAX has increased from 224 to 614 in the 10.13 SDK,
meaning that the maximum supported size for old_state and new_state in
[mach_]exception_raise_state[_identity]() has increased from 896 to
2,456 bytes. This constant defines the size of the buffer that these
MIG-generated routines will work with. By providing this definition in
compat, the buffer size is increased when building with older SDKs.
Note that on the “send” side, the size of the message given to
mach_msg() will be trimmed to include only the valid part of the state
area based on the stateCnt field, so increasing the value to 614 here
won’t result Crashpad sending messages this large. That would be a
potential interoperability concern with older OS versions.
Bug: crashpad:185, crashpad:190
Change-Id: Ia46091ae46fd6227a17f59eb4bc00914be471aa7
Reviewed-on: https://chromium-review.googlesource.com/541515
Reviewed-by: Robert Sesek <rsesek@chromium.org>
_dyld_get_all_image_infos() was only used in test code in Crashpad.
This addresses two related problems.
When running on 10.13 or later, _dyld_get_all_image_infos() is not
available. It appears to still be implemented in dyld, but its symbol is
now private. This was always known to be an “internal” interface. When
it’s not available, fall back to obtaining the address of the process’
dyld_all_image_infos structure by calling task_info(…, TASK_DYLD_INFO,
…). Note that this is the same thing that the code being tested does,
although the tests are not rendered entirely pointless because the code
being tested consumes dyld_all_image_infos through its own
implementation of an out-of-process reader interface, while the
dyld_all_image_infos data obtained by _dyld_get_all_image_infos() is
handled strictly in-process by ordinary memory reads. This is covered by
bug 187.
When building with the 10.13 SDK, no _dyld_get_all_image_infos symbol is
available to link against. In this case, access the symbol strictly at
runtime via dlopen() if it may be available, or when expecting to only
run on 10.13 and later, don’t even bother looking for this symbol. This
is covered by part of bug 188.
Bug: crashpad:185, crashpad:187, crashpad:188
Change-Id: Ib283e070faf5d1ec35deee420213b53ec24fb1d3
Reviewed-on: https://chromium-review.googlesource.com/534633
Reviewed-by: Robert Sesek <rsesek@chromium.org>
ThreadInfo provides a uniform interface to collect register sets or
the thread-local storage address across bitness for x86 and ARM family
architectures. Additionally, ThreadInfo.h defines context structs which
mirror those provided in sys/user.h. This allows tracing across bitness
as the structs in sys/user.h are only provided for a single target
architecture.
Bug: crashpad:30
Change-Id: I91d0d788927bdac5fb630a6ad3c6ea6d3645ef8a
Reviewed-on: https://chromium-review.googlesource.com/494075
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
When Yama is enabled and /proc/sys/kernel/yama/ptrace_scope is set to 1
(YAMA_SCOPE_RELATIONAL), for a child to ptrace() its parent, the parent
must first call prctl(PR_SET_PTRACER, child_pid, ...).
Bug: crashpad:30
Test: crashpad_util_test ScopedPtraceAttach.*
Change-Id: Ic85e8551259f17f372b2362887e7701b833b4cb4
Reviewed-on: https://chromium-review.googlesource.com/472006
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
The new Linux ProcessInfo implementation uses two macros not readily
available in NDK API versions older than 21 (Android 5.0.0): NT_PRSTATUS
and PR_GETREGSET.
Chrome uses API 21 for 64-bit builds, but uses API 16 for 32-bit builds.
NT_PRSTATUS is normally defined by <elf.h> or by <linux/elf.h>, included
by <elf.h>. Although the definition in <linux/elf.h> is available in
older NDK API versions, this internal header does not mix well with
<elf.h> unless <elf.h> contemplates this combination. As of NDK API 21,
<elf.h> actually delegates most of its work to <linux/elf.h>.
PR_GETREGSET is not available in the NDK at all until API 21. Its
definition is in <linux/ptrace.h>. Most user code should #include
<sys/ptrace.h> instead, which includes <linux/ptrace.h>.
Bug: crashpad:30
Test: crashpad_util_test ProcessInfo.*
Change-Id: I4d07a9964db4665a49bde490e905ae9126880bc5
Reviewed-on: https://chromium-review.googlesource.com/455659
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
MINIDUMP_MISC_INFO_5 can carry information about extended XSTATE state
components and the process cookie value.
I made some informed guesses about the precise meanings of some of the
attributes of the XSTATE stuff.
I don’t know what “process cookie” refers to yet. My guess is that it’s
the stack canary value, or something similar. But since this isn’t an
informed guess, I haven’t written it into the documentation.
Crashpad does not yet use either of these features.
BUG=crashpad:58
Change-Id: I614568287a01fec99d6cd60e378a6d6e20b4f48c
Reviewed-on: https://chromium-review.googlesource.com/409630
Reviewed-by: Scott Graham <scottmg@chromium.org>
Commit-Queue: Mark Mentovai <mark@chromium.org>
This defines PROCESSOR_ARCHITECTURE_ARM64 and
PROCESSOR_ARCHITECTURE_ARM32_ON_WIN64, usable in
MINIDUMP_SYSTEM_INFO::ProcessorArchitecture.
This also defines four new PF_* flags usable in
CPU_INFORMATION::OtherCpuInfo::ProcessorFeatures.
Definitions are provided in compat/non_win, and #ifdef-guarded
definitions in compat/win for compatibility with Windows SDKs older than
Chrome’s minimum requirement.
PROCESSOR_ARCHITECTURE_ARM64 means the same thing that Breakpad used the
value 0x8003 for. At this point, Crashpad aims to use the
officially-defined constant. In the minidump_extensions.h
MinidumpCPUArchitecture enum, 0x8003 remains present and documented as
deprecated to discourage reuse of that constant for another purpose.
BUG=
Change-Id: Ic4b5fb9de31c5f00f3698f112633ece2a036b889
Reviewed-on: https://chromium-review.googlesource.com/409098
Reviewed-by: Scott Graham <scottmg@chromium.org>
This makes Doxygen’s output more actionable by setting QUIET = YES to
suppress verbose progress spew, and WARN_IF_UNDOCUMENTED = NO to prevent
warnings for undocumented classes and members from being generated. The
latter is too noisy, producing 721 warnings in the current codebase.
The remaining warnings produced by Doxygen were useful and actionable.
They fell into two categories: abuses of Doxygen’s markup syntax, and
missing (or misspelled) parameter documentation. In a small number of
cases, pass-through parameters had intentionally been left undocumented.
In these cases, they are now given blank \param descriptions. This is
not optimal, but there doesn’t appear to be any other way to tell
Doxygen to allow a single parameter to be undocumented.
Some tricky Doxygen errors were resolved by asking it to not enter
directiores that we do not provide documentation in (such as the
“on-platform” compat directories, compat/mac and compat/win, as well as
compat/non_cxx11_lib) while allowing it to enter the
“off-platform” directories that we do document (compat/non_mac and
compat/non_win).
A Doxygen run (doc/support/generate_doxygen.sh) now produces no output
at all. It would produce warnings if any were triggered.
Not directly related, but still relevant to documentation,
doc/support/generate.sh is updated to remove temporary removals of
now-extinct files and directories. doc/appengine/README is updated so
that a consistent path to “goapp” is used throughout the file.
Change-Id: I300730c04de4d3340551ea3086ca70cc5ff862d1
Reviewed-on: https://chromium-review.googlesource.com/408812
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Use “macOS” as the generic unversioned name of the operating system in
comments. For version-specific references, use Mac OS X through 10.6, OS
X from 10.7 through 10.11, and macOS for 10.12.
Change-Id: I1ebee64fbf79200bc799d4a351725dd73257b54d
Reviewed-on: https://chromium-review.googlesource.com/408269
Reviewed-by: Robert Sesek <rsesek@chromium.org>
RESOURCE_TYPE_IO always appears to be non-fatal based on disassembly of
the function responsible for sending it in xnu 3705.0.0.1.10 (10.12dp1
16A201w).
BUG=crashpad:120,crashpad:124
Change-Id: I9dcc6673f922cbd7af910b76991825a9d9c96fe6
Reviewed-on: https://chromium-review.googlesource.com/355250
Reviewed-by: Robert Sesek <rsesek@chromium.org>
This was done in Chromium’s local copy of Crashpad in 562827afb599. This
change is similar to that one, except more care was taken to avoid
including headers from a .cc or _test.cc when already included by the
associated .h. Rather than using <stddef.h> for size_t, Crashpad has
always used <sys/types.h>, so that’s used here as well.
This updates mini_chromium to 8a2363f486e3a0dc562a68884832d06d28d38dcc,
which removes base/basictypes.h.
e128dcf10122 Remove base/move.h; use std::move() instead of Pass()
8a2363f486e3 Move basictypes.h to macros.h
R=avi@chromium.org
Review URL: https://codereview.chromium.org/1566713002 .
This more-natural spelling doesn’t require Crashpad developers to have
to remember anything special when writing code in Crashpad. It’s easier
to grep for and it’s easier to remove the “compat” part when pre-C++11
libraries are no longer relevant.
R=scottmg@chromium.org
Review URL: https://codereview.chromium.org/1513573005 .
