143 Commits

Author SHA1 Message Date
Joshua Peraza
0429216f59 linux: Add CrashReportExceptionHandler
Bug: crashpad:30
Change-Id: I2855b34abe34f6d665539de0e4a227c933bd2b8c
Reviewed-on: https://chromium-review.googlesource.com/922923
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
2018-02-16 17:17:57 +00:00
Scott Graham
7faa2ef898 Get CrashpadInfo address via a .note, rather than dynamic symtab
Embeds the address of g_crashpad_info into a .note section (which is
readable by the generic code to read notes in ElfImageReader).
Unfortunately because the note section is in libclient.a, it would
normally be dropped at link time.  To avoid that, GetCrashpadInfo() has
a reference *back* to that section, which in turn forces the linker to
include it, allowing the note reader to find it at runtime.

Previously, it was necessary to have the embedder of "client" figure out
how to cause `g_crashpad_info` to appear in the final module's dynamic
symbol table.  With this new approach, there's no manual configuration
necessary, as it's not necessary for the symbol to be exported.

This is currently only implemented in the Linux module reader (and I
believe the current set of enabled tests aren't exercising it?) but it
will also be done this way for the Fuchsia implementation of
ModuleSnapshot.

Bug: crashpad:196
Change-Id: I599db5903bc98303130d11ad850ba9ceed3b801a
Reviewed-on: https://chromium-review.googlesource.com/912284
Commit-Queue: Scott Graham <scottmg@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
2018-02-15 19:02:12 +00:00
Joshua Peraza
c45ba7920e Make NewReport objects own their associated database resources
This change updates CrashReportDatbase::NewReport objects to own the
file handle associated with the new report, now accessible via a
FileWriter. NewReport's destructor closes its file handle and removes
its new report unless disarmed with FinishedWritingCrashReport,
eliminating the need for CallErrorWritingCrashReport.

Bug: crashpad:206
Change-Id: Iccb5bbc0ebadb07a237ff8eb938389afcfeae2a5
Reviewed-on: https://chromium-review.googlesource.com/916941
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
Reviewed-by: Scott Graham <scottmg@chromium.org>
2018-02-14 01:33:52 +00:00
Scott Graham
b83f4c731d Let UUID::InitializeFromString accept StringPiece16 too
Split out of crrev.com/c/689745 by jperaza, with a simple test added.

It is useful for this to be an overload instead of a separate signature
so that code that extracts a UUID string out of a filename can treat it
generically between Windows and non-Windows.

Bug: crashpad:196, crashpad:206
Change-Id: I0d7d84a93d9526d1aae8839179dfe903acca091b
Reviewed-on: https://chromium-review.googlesource.com/916885
Commit-Queue: Scott Graham <scottmg@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
2018-02-13 20:18:24 +00:00
Joshua Peraza
38b20ca57e Relocate CaptureContext to misc and implement on Linux
Previously, the mac version was  under client/ and win under util/win/.
This cl brings them all together under util/misc/ and combines common
test code.

Bug: crashpad:30
Change-Id: Idf0d0158b969d5aa9802dfc8c21f73041b2bcc6c
Reviewed-on: https://chromium-review.googlesource.com/907755
Reviewed-by: Mark Mentovai <mark@chromium.org>
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
2018-02-09 17:25:45 +00:00
Scott Graham
f62a30e977 fuchsia: Implementation of MultiprocessExec
This supports multiprocess tests of the non-fork() variety.

Also, improve directory finding so that the
crashpad_test_test_multiprocess_exec_test_child binary can be located
correctly on Fuchsia.

Doc ref for launchpad:
https://fuchsia.googlesource.com/zircon/+/master/system/ulib/launchpad/include/launchpad/launchpad.h#23

Also, roll mini_chromium to pick up ScopedZxHandle addition. Includes:
a19ef08 Merge ScopedZxHandle from Chromium base
f21c900 fuchsia: Move zircon libs dep to base, rather than global

Bug: crashpad:196
Change-Id: Id01dee43f2d04e682e70c12777aff41f8dd848d6
Reviewed-on: https://chromium-review.googlesource.com/868967
Reviewed-by: Mark Mentovai <mark@chromium.org>
Commit-Queue: Scott Graham <scottmg@chromium.org>
2018-01-17 23:45:42 +00:00
Scott Graham
4d2414e38e fuchsia: Add implemention of ProcessMemory
Bug: crashpad:196
Change-Id: I04a29afcbb16b5ef14d6f83d7af1d954f5164ee9
Reviewed-on: https://chromium-review.googlesource.com/868736
Reviewed-by: Mark Mentovai <mark@chromium.org>
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
Commit-Queue: Scott Graham <scottmg@chromium.org>
2018-01-16 23:08:41 +00:00
Joshua Peraza
70563e92f4 Add CrashpadInfoReader to read CrashpadInfo via ProcessMemory
Bug: crashpad:30
Change-Id: I295d518ee0eef1fd61e5544cd6bad25827d07a02
Reviewed-on: https://chromium-review.googlesource.com/846025
Reviewed-by: Mark Mentovai <mark@chromium.org>
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
2018-01-09 01:27:50 +00:00
Ilya Sherman
344acadfdd [Cleanup] Rename UMA_HISTOGRAM_SPARSE_SLOWLY to base::UmaHistogramSparse().
R=mark@chromium.org

Bug: chromium:773850
Change-Id: Idef7b4c821dcac03e095d1400534ddf503a22423
Reviewed-on: https://chromium-review.googlesource.com/828530
Reviewed-by: Mark Mentovai <mark@chromium.org>
2017-12-15 19:17:46 +00:00
Scott Graham
741a84a298 fuchsia: Add runner, get crashpad_test_test building and running
- Implement build/run_tests.py to run on Fuchsia device
- Implement paths_fuchsia.cc using standard Fuchsia namespace layout
- Exclude multiprocess tests, currently unimplemented
- Don't use unnecessary O_ flags on Fuchsia in open() call.

Bug: crashpad:196, chromium:726124, ZX-797
Change-Id: Ie59dce685b4c3fe54f3e36f357c1101d402ee8b7
Reviewed-on: https://chromium-review.googlesource.com/802180
Commit-Queue: Scott Graham <scottmg@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
2017-12-05 18:59:26 +00:00
Scott Graham
0d05b0d59e fuchsia: Use RandBytes UUID generator
There's no particular UUID generator on Fuchsia, so use the RandBytes()
version. (That won't work either yet, but will once RandBytes() is
implemented.)

Bug: crashpad:196
Change-Id: Id740bbfc80e170d7ab19995ac88db5eed474c119
Reviewed-on: https://chromium-review.googlesource.com/786822
Commit-Queue: Scott Graham <scottmg@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
2017-11-27 21:48:44 +00:00
Scott Graham
050d111bf9 fuchsia: Set METRICS_OS_NAME
Bug: crashpad:196
Change-Id: I4f01c4f04c94a745b4c30bc41f66d2ae010e883a
Reviewed-on: https://chromium-review.googlesource.com/786817
Commit-Queue: Scott Graham <scottmg@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
2017-11-27 21:28:04 +00:00
Mark Mentovai
20e5aba1af URL cleanups: switch to HTTPS, fix dead ones, use canonical ones
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>
2017-11-20 22:23:39 +00:00
Mark Mentovai
94a5a72efa mac: Tests that crash intentionally shouldn’t go to ReportCrash
Crashpad has many tests that crash intentionally. Some of these are
gtest death tests, and others arrange for intentional crashes to test
Crashpad’s own crash-catching logic. On macOS, all of the gtest death
tests and some of the other intentional crashes were being logged by
ReportCrash, the system’s crash reporter. Since these reports
corresponded to intentional crashes, they were never useful, and served
only to clutter ~/Library/Logs/DiagnosticReports.

Since Crashpad is adept at handling exceptions on its own, this
introduces the “exception swallowing server”,
crashpad_exception_swallower, which is a Mach exception server that
implements a no-op exception handler routine for all exceptions
received. The exception swallowing server is established as the task
handler for EXC_CRASH and EXC_CORPSE_NOTIFY exceptions during gtest
death tests invoked by {ASSERT,EXPECT}_DEATH_{CHECK,CRASH}, and for all
child processes invoked by the Multiprocess test infrastructure. The
exception swallowing server is not in effect at other times, so
unexpected crashes in test code can still be handled by ReportCrash or
another crash reporter.

With this change in place, no new reports are generated in the
user-level ~/Library/Logs/DiagnosticReports or the system’s
/Library/Logs/DiagnosticReports during a run of Crashpad’s full test
suite on macOS.

Bug: crashpad:33
Change-Id: I13891853a7e25accc30da21fa7ea8bd7d1f3bd2f
Reviewed-on: https://chromium-review.googlesource.com/777859
Commit-Queue: Mark Mentovai <mark@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
2017-11-20 18:58:34 +00:00
Joshua Peraza
b8f61fdc8b Add TimevalToTimespec and use it to get CurrentTime on macOS
A follow-up to:
https://chromium-review.googlesource.com/c/crashpad/crashpad/+/744298/35/util/file/filesystem_test.cc#31

Bug: crashpad:206
Change-Id: I2f711839ae7746104f1fee9685f2ab9059d9c2b3
Reviewed-on: https://chromium-review.googlesource.com/762479
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
2017-11-10 01:49:05 +00:00
Joshua Peraza
18726100ed Move win/time to misc/time and add more conversion functions
This CL pulls together similar time conversion functions and adds
conversions between `FILETIME`s and `timespec`s.

Bug: crashpad:206
Change-Id: I1d9b1560884ffde2364af0092114f82e1534ad1c
Reviewed-on: https://chromium-review.googlesource.com/752574
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
2017-11-06 22:37:27 +00:00
Mark Mentovai
43b798b492 test: Fix paths for crashpad_tests monolith in Chromium
Instead of individual per-directory test executables like
crashpad_util_test, all Crashpad tests in Chromium will be run from a
single crashpad_tests executable.

Test: crashpad_util_test Paths.Executable, ProcessInfo.Self; crashpad_snapshot_test PEImageReader.DebugDirectory
Bug: chromium:779790
Change-Id: If95272fd641734fbdb8e231fbcdc4e7ccb2cb822
Reviewed-on: https://chromium-review.googlesource.com/749303
Reviewed-by: Scott Graham <scottmg@chromium.org>
2017-11-01 17:00:30 +00:00
Mark Mentovai
fbc365fa9e GCC 7.2 support (-Wnoexcept-type)
P0012R1, accepted into C++17, makes a function’s “noexcept” (or
“throw()”) specification part of its signature. GCC 7.2 provides a
warning, -Wnoexcept-type, that is triggered when a function pointer type
with an exception specification is used in pre-C++17 code in such a way
as to pose an ABI incompatibility with C++17 code.

https://gcc.gnu.org/onlinedocs/gcc-7.2.0/gcc/C_002b_002b-Dialect-Options.html#index-Wnoexcept-type

Warnings are of the form:

In file included from ../../util/misc/from_pointer_cast_test.cc:15:0:
../../util/misc/from_pointer_cast.h:64:1: error: mangled name for ‘typename std::enable_if<(std::is_pointer<From>::value && std::is_pointer<_Tp>::value), To>::type crashpad::FromPointerCast(From) [with To = const volatile void*; From = void* (*)(long unsigned int) throw ()]’ will change in C++17 because the exception specification is part of a function type [-Werror=noexcept-type]
 FromPointerCast(From from) {
 ^~~~~~~~~~~~~~~
../../util/misc/from_pointer_cast.h:64:1: error: mangled name for ‘typename std::enable_if<(std::is_pointer<From>::value && std::is_pointer<_Tp>::value), To>::type crashpad::FromPointerCast(From) [with To = volatile void*; From = void* (*)(long unsigned int) throw ()]’ will change in C++17 because the exception specification is part of a function type [-Werror=noexcept-type]

In Crashpad, this warning is triggered by the two FromPointerCast<>()
variants that accept function pointer “From” arguments. This occurs when
using glibc as the standard C library, since glibc declares its
functions as “throw()”. FromPointerCast<>() is used with pointers to
glibc functions such as malloc() and getpid().

The warning is disabled for the FromPointerCast<>() variants that would
trigger it. The warning is not useful or actionable in this internal
Crashpad code where ABI changes due to language version (including
mangling changes) are not a concern.

Clang 4.0 has the similar -Wc++1z-compat-mangling option (also available
as -Wc++17-compat-mangling and the GCC-compatible -Wnoexcept-type in
Clang 5.0) but it is not triggered by this pattern.

Change-Id: Id293db3954be415f67a55476ca72bfb7d399aa3b
Reviewed-on: https://chromium-review.googlesource.com/738292
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
Commit-Queue: Mark Mentovai <mark@chromium.org>
2017-10-25 18:29:58 +00:00
Joshua Peraza
474c7331a6 Add DirectoryReader to iterate over files in a directory
This change also adds functions to create directories, remove files and
directories, and check for the existence of files and directories.

Change-Id: I62b78219ae2b277d6976d2d90ec86fcabd0ef073
Reviewed-on: https://chromium-review.googlesource.com/696132
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
2017-10-16 19:56:54 +00:00
Mark Mentovai
a327c86a52 C++14 is required, don’t pretend to support pre-C++11 or pre-MSVS 2015
Change-Id: Ide835421599480acc63e8e88ce2217433c0d376e
Reviewed-on: https://chromium-review.googlesource.com/719036
Reviewed-by: Leonard Mosescu <mosescu@chromium.org>
2017-10-13 15:49:59 +00:00
Mark Mentovai
f6aebd8baf android: Fix build after 45de8bf76e32
OS_LINUX is not defined on Android. Chromium made this call and we can’t
revisit it here and now.

Change-Id: I70fd6ac35ba9731e2fd06792bf8cae332e2b360c
Reviewed-on: https://chromium-review.googlesource.com/700655
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
Commit-Queue: Mark Mentovai <mark@chromium.org>
2017-10-04 18:42:35 +00:00
Dave Bort
45de8bf76e Add generic VMAddress-related types
This will allow sharing code that is currently hard-coded to use (e.g.)
LinuxVMAddress or mach_vm_size_t.

Change-Id: I7bf20600c73d4ec7d2a029754f9043a236a38e5a
Reviewed-on: https://chromium-review.googlesource.com/677142
Reviewed-by: Mark Mentovai <mark@chromium.org>
Commit-Queue: Dave Bort <dbort@google.com>
2017-09-26 17:45:38 +00:00
Robert Sesek
f16e4eb9ff Implement SleepNanoseconds() on Windows.
This uses the naïve implementation originally written
https://codereview.chromium.org/807973002/#ps180001.

Bug: crashpad:192
Change-Id: Id00908dafb8886d6163a8b17213d3b7c33b81963
Reviewed-on: https://chromium-review.googlesource.com/606998
Commit-Queue: Robert Sesek <rsesek@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
2017-08-08 22:11:42 +00:00
Mark Mentovai
c332e7ffda Fix Doxygen usage in util/misc/lexing.h
Change-Id: Ifdef347426655df2ab54aed0eec0cfbe4bbd7cb1
Reviewed-on: https://chromium-review.googlesource.com/592696
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
2017-07-29 21:11:33 +00:00
Mark Mentovai
8f0636288a Use constexpr at namespace scope
This is essentially based on a search for “^const .*=”.

Change-Id: I9332c1f0cf7c891ba1ae373dc537f700f9a1d956
Reviewed-on: https://chromium-review.googlesource.com/585452
Reviewed-by: Leonard Mosescu <mosescu@chromium.org>
2017-07-29 01:06:52 +00:00
Mark Mentovai
6dac7ecdf5 Use constexpr at function scope
This is essentially based on a search for “^ *const [^*&]*=[^(]*$”

Change-Id: Id571119d0b9a64c6f387eccd51cea7c9eb530e13
Reviewed-on: https://chromium-review.googlesource.com/585555
Reviewed-by: Leonard Mosescu <mosescu@chromium.org>
2017-07-29 00:50:40 +00:00
Mark Mentovai
281be63d00 Standardize on static constexpr for arrays when possible
This uses “static” at function scope to avoid making local copies, even
in cases where the compiler can’t see that the local copy is
unnecessary. “constexpr” adds additional safety in that it prevents
global state from being initialized from any runtime dependencies, which
would be undesirable.

At namespace scope, “constexpr” is also used where appropriate.

For the most part, this was a mechanical transformation for things
matching '(^| )const [^=]*\['.

Similar transformations could be applied to non-arrays in some cases,
but there’s limited practical impact in most non-array cases relative to
arrays, there are far more use sites, and much more manual intervention
would be required.

Change-Id: I3513b739ee8b0be026f8285475cddc5f9cc81152
Reviewed-on: https://chromium-review.googlesource.com/583997
Commit-Queue: Mark Mentovai <mark@chromium.org>
Reviewed-by: Leonard Mosescu <mosescu@chromium.org>
2017-07-25 17:40:51 +00:00
Joshua Peraza
9299d409ab linux: Refactor reading start time from the stat file
Bug: crashpad:30
Change-Id: Ie8137db2a5b6f2d4947df108d1fb5bdd9f8ab391
Reviewed-on: https://chromium-review.googlesource.com/580448
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
2017-07-24 18:41:15 +00:00
Mark Mentovai
b42854dfe1 Fix Doxygen after 8c802aace407
Change-Id: I9fe34c0a0322f327e7a69c831b11daa1cf835324
Reviewed-on: https://chromium-review.googlesource.com/541057
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
2017-06-20 15:53:31 +00:00
Joshua Peraza
8c802aace4 Add ReinterpretBytes which does a checked, variable size bit cast
This renames and improves the VariableSizeBitCast helper from
util/linux/auxiliary_vector.* and moves it to misc.

Change-Id: I4bf46f4cfc0e60c900ff9bde467a21ad43c684cd
Reviewed-on: https://chromium-review.googlesource.com/534174
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
2017-06-19 23:15:43 +00:00
Mark Mentovai
15103742e0 Use FromPointerCast<>() in many places where it makes sense
I opted to leave casts to types that were definitely the same size
alone. reinterpret_cast<uintptr_t>(pointer) and
reinterpret_cast<intptr_t>(pointer) should always be safe, for example.
Casts to other integral types have been replaced with
FromPointerCast<>(), which does zero-extension or sign-extension based
on the target type.

To make it possible to use FromPointerCast<>() with some use sites that
were already using checked_cast<>(), FromPointerCast<>() now uses
check_cast<>() when converting to a narrower type.

Test: crashpad_util_test FromPointerCast*, others
Change-Id: I4a71b4aa2d87f545c75524290a702f5f3138d675
Reviewed-on: https://chromium-review.googlesource.com/489701
Reviewed-by: Scott Graham <scottmg@chromium.org>
2017-05-01 15:54:00 +00:00
Mark Mentovai
984749479f Introduce FromPointerCast<>(), with defined sign/zero-extension behavior
Some of the new Linux/Android tests were failing in 32-bit code where
pointers were being casted via reinterpret_cast<>() to LinuxVMAddress,
an unsigned 64-bit type. The behavior of such casts is
implementation-defined, and in this case, sign-extension was being used
to convert the 32-bit pointers to 64 bits, resulting in very large
(unsigned) LinuxVMAddress values that could not possibly refer to proper
addresses in a 32-bit process’ address space.

The offending reinterpret_cast<>() conversions have been replaced with
the new FromPointerCast<>(), which is careful to do sign-extension when
converting to a signed type, and zero-extension when converting to an
unsigned type like LinuxVMAddress.

Bug: crashpad:30
Test: crashpad_util_test FromPointerCast*:MemoryMap.*:ProcessMemory.*
Change-Id: I6f1408dc63369a8740ecd6015d657e4407a7c271
Reviewed-on: https://chromium-review.googlesource.com/488264
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
2017-04-27 19:42:25 +00:00
Mark Mentovai
44e32fe123 Tweak InitializationState tests that rely on undefined behavior
These tests:
 - InitializationState.InitializationState
 - InitializationStateDcheckDeathTest.Destroyed_NotUninitialized
 - InitializationStateDcheckDeathTest.Destroyed_NotValid
rely on certain behavior from destroyed objects. This is undefined
behavior and we know it, but the whole point of the of
InitializationState and InitializationStateDcheck destructors is to try
to help catch other parts of the program making use of undefined
behavior.

To make it impossible for the memory that formerly hosted these objects
to be repurposed during tests after the objects are destroyed, these
tests that attempt to work with destroyed objects are changed to use
placement new, so that the lifetimes of the objects can be decoupled
from the lifetimes of the buffers.

Test: crashpad_util_test InitializationState*
Change-Id: Ie972a54116c8b90a21a502d3ba13623583dfac06
Reviewed-on: https://chromium-review.googlesource.com/486383
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
2017-04-25 18:09:49 +00:00
Mark Mentovai
4b450c8137 test: Use (actual, [un]expected) in gtest {ASSERT,EXPECT}_{EQ,NE}
gtest used to require (expected, actual) ordering for arguments to
EXPECT_EQ and ASSERT_EQ, and in failed test assertions would identify
each side as “expected” or “actual.” Tests in Crashpad adhered to this
traditional ordering. After a gtest change in February 2016, it is now
agnostic with respect to the order of these arguments.

This change mechanically updates all uses of these macros to (actual,
expected) by reversing them. This provides consistency with our use of
the logging CHECK_EQ and DCHECK_EQ macros, and makes for better
readability by ordinary native speakers. The rough (but working!)
conversion tool is
https://chromium-review.googlesource.com/c/466727/1/rewrite_expectassert_eq.py,
and “git cl format” cleaned up its output.

EXPECT_NE and ASSERT_NE never had a preferred ordering. gtest never made
a judgment that one side or the other needed to provide an “unexpected”
value. Consequently, some code used (unexpected, actual) while other
code used (actual, unexpected). For consistency with the new EXPECT_EQ
and ASSERT_EQ usage, as well as consistency with CHECK_NE and DCHECK_NE,
this change also updates these use sites to (actual, unexpected) where
one side can be called “unexpected” as, for example, std::string::npos
can be. Unfortunately, this portion was a manual conversion.

References:

https://github.com/google/googletest/blob/master/googletest/docs/Primer.md#binary-comparison
77d6b17338
https://github.com/google/googletest/pull/713

Change-Id: I978fef7c94183b8b1ef63f12f5ab4d6693626be3
Reviewed-on: https://chromium-review.googlesource.com/466727
Reviewed-by: Scott Graham <scottmg@chromium.org>
2017-04-04 12:34:24 +00:00
Mark Mentovai
4688351623 “Promote” test::Paths::Executable() to Paths::Executable()
This supports the “double handler” or “double handler with low
probability” models from https://crashpad.chromium.org/bug/143.

For crashpad_handler to be become its own client, it needs access to its
own executable path to pass to CrashpadClient::StartHandler(). This was
formerly available in the test-only test::Paths::Executable(). Bring
that function’s implementation to the non-test Paths::Executable() in
util/misc, and rename test::Paths to test::TestPaths to avoid future
confusion.

test::TestPaths must still be used to access TestDataRoot(), which does
not make any sense to non-test code.

test::TestPaths::Executable() is retained for use by tests, which most
likely prefer the fatal semantics of that function. Paths::Executable()
is not fatal because for the purposes of implementing the double
handler, a failure to locate the executable path (which may happen on
some systems in deeply-nested directory hierarchies) shouldn’t cause the
initial crashpad_handler to abort, even if it does prevent a second
crashpad_handler from being started.

Bug: crashpad:143
Test: crashpad_util_test Paths.*, crashpad_test_test TestPaths.*
Change-Id: I9f75bf61839ce51e33c9f7c0d7031cebead6a156
Reviewed-on: https://chromium-review.googlesource.com/466346
Reviewed-by: Scott Graham <scottmg@chromium.org>
Commit-Queue: Mark Mentovai <mark@chromium.org>
2017-04-03 18:58:01 +00:00
Mark Mentovai
013d5e14a3 #include <stddef.h> where offsetof() is used
Bug: crashpad:30
Change-Id: If23ca9ea3141d3d34dc494aa29a1bd1dc8f83130
Reviewed-on: https://chromium-review.googlesource.com/458079
Reviewed-by: Scott Graham <scottmg@chromium.org>
2017-03-23 02:15:32 +00:00
Mark Mentovai
6da9708e7c doc: Fix Doxygen errors
Change-Id: I5d5abf7b7eabe269a7c7b4d305a67fe910c887fd
Reviewed-on: https://chromium-review.googlesource.com/446480
Reviewed-by: Scott Graham <scottmg@chromium.org>
2017-02-23 01:43:40 +00:00
Mark Mentovai
c1af20f1aa metrics: Consistently comment about enums used for metrics
BUG=crashpad:100

Change-Id: I9ed0f260b4c92e7a706418f58c3db1ae027a04ab
Reviewed-on: https://chromium-review.googlesource.com/446557
Reviewed-by: Mark Mentovai <mark@chromium.org>
2017-02-23 00:13:04 +00:00
Mark Mentovai
f34ed66b93 metrics: Record handler lifetime milestone events
It could be useful to put our existing Crashpad.HandlerCrashed metrics
into context by getting a sense of handler starts, clean exits, and
other types of exits.

BUG=crashpad:100

Change-Id: I8982075158ea6d210eb2ddad678302e339a42192
Reviewed-on: https://chromium-review.googlesource.com/444124
Reviewed-by: Scott Graham <scottmg@chromium.org>
2017-02-22 18:48:12 +00:00
Mark Mentovai
0c322ecc3f Use zlib to gzip-compress uploads
This adds zlib to Crashpad. By default in standalone Crashpad builds,
the system zlib will be used where available. A copy of Chromium’s zlib
(currently a slightly patched 1.2.11) is checked out via DEPS into
third_party for use on Windows, which does not have a system zlib.

zlib is used to produce gzip streams for HTTP upload request bodies sent
by crashpad_handler by default. The Content-Encoding: gzip header is set
for these compressed request bodies. Compression can be disabled for
upload to servers without corresponding decompression support by
starting crashpad_handler with the --no-upload-gzip option.

Most minidumps compress quite well with zlib. A size reduction of 90% is
not uncommon.

BUG=crashpad:157
TEST=crashpad_util_test GzipHTTPBodyStream.*:HTTPTransport.*

Change-Id: I99b86db3952c3685cd78f5dc858a60b54399c513
Reviewed-on: https://chromium-review.googlesource.com/438585
Reviewed-by: Robert Sesek <rsesek@chromium.org>
2017-02-16 16:26:19 +00:00
Scott Graham
5b83e58771 win: Remove use of rpcrt4 and advapi32 from some util code
ConvertStringSecurityDescriptorToSecurityDescriptor() is used when
creating the initial connection pipe. Because this is done from inside
DllMain(), we cannot use advapi32 (where this function is). Instead,
save the binary representation of the self-relative SECURITY_DESCRIPTOR.
It is conceivable that this could change, but unlikely as this is the
same blob that would be stored on a file in NTFS.

Another potential approach would be to not make the pipe available to
all integrity levels here, and instead modify the Chromium sandbox code
to allow a specific pipe name prefix that would have to correspond with
the pipe name that Crashpad creates.

Similarly, UuidCreate() (used when initializing the database) is in a
DLL that can't be loaded early, so use the Linux/Android implementation
on Windows too.

R=mark@chromium.org
BUG=chromium:655788,chromium:656800

Change-Id: I434f8e96fc275fc30d0a31208b025bfc08595ff9
Reviewed-on: https://chromium-review.googlesource.com/417223
Reviewed-by: Mark Mentovai <mark@chromium.org>
2016-12-07 20:03:45 +00:00
Mark Mentovai
777634b1eb Use ADDRESS_SANITIZER instead of __has_feature(address_sanitizer)
__has_feature() is a Clang-ism not implemented by GCC.
base/compiler_specific.h provides a HAS_FEATURE() macro that always
returns 0 when __has_feature() is not implemented. Use this macro for
compatibility with GCC and other compilers that do not implement this
Clang extension.

http://clang.llvm.org/docs/LanguageExtensions.html#has-feature-and-has-extension

For GCC’s Address Sanitizer implementation, test the
__SANITIZE_ADDRESS__ macro that it provides as an alternative to
__has_feature(address_sanitizer).

Note that in Chrome builds, ADDRESS_SANITIZER is pushed in by the build
system. The definition of ADDRESS_SANITIZER provides another way for
that macro to be set. It’s supplementary, not exclusive.

cb33b24372/build/config/BUILD.gn (118)

BUG=crashpad:30

Change-Id: I5c3145d29bbc966925369c03a37b1ecb5622a004
Reviewed-on: https://chromium-review.googlesource.com/413109
Reviewed-by: Robert Sesek <rsesek@chromium.org>
2016-11-22 19:28:06 +00:00
Mark Mentovai
b37aa95da7 MSVC++ fix: ALLOW_UNUSED_LOCAL variables only used in static_assert
After f83530bf9a0b and 72fbc56e58d3, while compiling
arraysize_unsafe_test.cc:

…\crashpad\util\misc\arraysize_unsafe_test.cc(58) : error C2220: warning treated as error - no 'object' file generated
…\crashpad\util\misc\arraysize_unsafe_test.cc(58) : warning C4101: 's10' : unreferenced local variable
…\crashpad\util\misc\arraysize_unsafe_test.cc(33) : warning C4101: 'i1' : unreferenced local variable
…\crashpad\util\misc\arraysize_unsafe_test.cc(24) : warning C4101: 'c1' : unreferenced local variable
…\crashpad\util\misc\arraysize_unsafe_test.cc(27) : warning C4101: 'c2' : unreferenced local variable
…\crashpad\util\misc\arraysize_unsafe_test.cc(55) : warning C4101: 's1' : unreferenced local variable
…\crashpad\util\misc\arraysize_unsafe_test.cc(39) : warning C4101: 'i4' : unreferenced local variable
…\crashpad\util\misc\arraysize_unsafe_test.cc(45) : warning C4101: 'l9' : unreferenced local variable
…\crashpad\util\misc\arraysize_unsafe_test.cc(30) : warning C4101: 'c4' : unreferenced local variable
…\crashpad\util\misc\arraysize_unsafe_test.cc(42) : warning C4101: 'l8' : unreferenced local variable
…\crashpad\util\misc\arraysize_unsafe_test.cc(36) : warning C4101: 'i2' : unreferenced local variable

The line numbers are totally out of order!

I think that my error was not actually ever running “gclient runhooks”,
so I never tested this locally on Windows as I thought I had.

https://build.chromium.org/p/client.crashpad/builders/crashpad_win_x64_dbg/builds/266/steps/compile%20with%20ninja/logs/stdio

TBR=scottmg@chromium.org (holiday)

Change-Id: I00414b54c04b5b7e3aa564b0c6fd49d20a47b6ea
Reviewed-on: https://chromium-review.googlesource.com/410129
Reviewed-by: Mark Mentovai <mark@chromium.org>
2016-11-11 18:07:16 +00:00
Mark Mentovai
72fbc56e58 MSVC++ fix: Don’t declare local[0] arrays for ARRAYSIZE_UNSAFE test
After f83530bf9a0b, while compiling arraysize_unsafe_test.cc:

…\crashpad\util\misc\arraysize_unsafe_test.cc(24) : error C2466: cannot allocate an array of constant size 0
…\crashpad\util\misc\arraysize_unsafe_test.cc(24) : error C2133: 'c0' : unknown size
…\crashpad\util\misc\arraysize_unsafe_test.cc(25) : error C2070: 'char []': illegal sizeof operand
…\crashpad\util\misc\arraysize_unsafe_test.cc(36) : error C2466: cannot allocate an array of constant size 0
…\crashpad\util\misc\arraysize_unsafe_test.cc(36) : error C2133: 'i0' : unknown size
…\crashpad\util\misc\arraysize_unsafe_test.cc(37) : error C2070: 'int []': illegal sizeof operand
…\crashpad\util\misc\arraysize_unsafe_test.cc(61) : error C2466: cannot allocate an array of constant size 0
…\crashpad\util\misc\arraysize_unsafe_test.cc(61) : error C2133: 's0' : unknown size
…\crashpad\util\misc\arraysize_unsafe_test.cc(62) : error C2070: 'crashpad::test::`anonymous-namespace'::ArraySizeUnsafe_ArraySizeUnsafe_Test::TestBody::S []': illegal sizeof operand

MSVC++ 2015 (14.0) doesn’t mind, and I thought that testing that version
would be enough, but the Crashpad buildbots still run MSVC++ 2013
(12.0), which doesn’t like this construct.

https://build.chromium.org/p/client.crashpad/builders/crashpad_win_x64_dbg/builds/265/steps/compile%20with%20ninja/logs/stdio

TBR=scottmg@chromium.org (holiday)

Change-Id: Ia8d140ceda3cd1bdec09c78560377b9bfad84dc4
Reviewed-on: https://chromium-review.googlesource.com/410128
Reviewed-by: Mark Mentovai <mark@chromium.org>
2016-11-11 17:54:08 +00:00
Mark Mentovai
f83530bf9a GCC fix: Don’t use arraysize() on packed structs
While compiling, for example, minidump_exception_writer.cc:

In file included from ../../minidump/minidump_exception_writer.h:26:0,
                 from ../../minidump/minidump_exception_writer.cc:15:
../../minidump/minidump_exception_writer.cc: In member function ‘void crashpad::MinidumpExceptionWriter::SetExceptionInformation(const std::vector<long unsigned int>&)’:
../../minidump/minidump_exception_writer.cc:67:44: error: cannot bind packed field ‘((crashpad::MinidumpExceptionWriter*)this)->crashpad::MinidumpExceptionWriter::exception_.MINIDUMP_EXCEPTION_STREAM::ExceptionRecord.MINIDUMP_EXCEPTION::ExceptionInformation’ to ‘long unsigned int (&)[15]’
       arraysize(exception_.ExceptionRecord.ExceptionInformation);
                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~^
../../third_party/mini_chromium/mini_chromium/base/macros.h:41:50: note: in definition of macro ‘arraysize’
 #define arraysize(array) (sizeof(ArraySizeHelper(array)))

Tested with:
 - GCC 4.9 from NDK r13 targeting arm with SDK 16
 - GCC 4.9 from NDK r13 targeting arm64 with SDK 21
 - GCC 6.2 targeting x86_64

BUG=crashpad:30

Change-Id: I63963b277a309b4715148215f51902c33ba13b5a
Reviewed-on: https://chromium-review.googlesource.com/409694
Reviewed-by: Scott Graham <scottmg@chromium.org>
2016-11-11 17:38:01 +00:00
Mark Mentovai
57b2210ed7 GCC fix: Make UUID POD
This eliminates all constructors, but nearly all points of use were
using the default constructor to initialize a UUID member variable as in
uuid_(). This syntax will still produce a zeroed-out UUID.

While compiling, for example, minidump_rva_list_writer.cc:

In file included from ../../minidump/minidump_rva_list_writer.h:25:0,
                 from ../../minidump/minidump_rva_list_writer.cc:15:
../../minidump/minidump_extensions.h:412:8: error: ignoring packed attribute because of unpacked non-POD field ‘crashpad::UUID crashpad::MinidumpCrashpadInfo::report_id’ [-Werror]
   UUID report_id;
        ^~~~~~~~~
../../minidump/minidump_extensions.h:424:8: error: ignoring packed attribute because of unpacked non-POD field ‘crashpad::UUID crashpad::MinidumpCrashpadInfo::client_id’ [-Werror]
   UUID client_id;
        ^~~~~~~~~

Tested with:
 - GCC 4.9 from NDK r13 targeting arm with SDK 16
 - GCC 4.9 from NDK r13 targeting arm64 with SDK 21
 - GCC 6.2 targeting x86_64

BUG=crashpad:30

Change-Id: Iec6b1557441b69d75246f2f75c59c4158fb7ca29
Reviewed-on: https://chromium-review.googlesource.com/409641
Reviewed-by: Scott Graham <scottmg@chromium.org>
2016-11-11 17:37:14 +00:00
Mark Mentovai
acabe35928 doc: Fix all Doxygen warnings, cleaning up some generated documentation
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>
2016-11-08 19:24:05 +00:00
Mark Mentovai
952f787f4a doc: Standardize on “macOS” in comments
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>
2016-11-08 19:21:44 +00:00
Mark Mentovai
b978b03fa1 Port most of crashpad_util_test to Linux/Android
- In the ProcessInfo test, port the global argc/argv getter to Linux by
   reading /proc/self/cmdline.
 - Use <inttypes.h> format macros for 64-bit types.
 - Only #include <sys/sysctl.h> on macOS.
 - #include <signal.h> instead of <sys/signal.h>.

In order to test on Linux/Android, the following changes to the
crashpad_util_test target must be made until more porting is complete:

 - Remove the dependency on crashpad_client because that library has not
   been ported yet.
 - Remove process_info_test.cc because it depends on crashpad_client and
   there is no implementation of ProcessInfo for Linux yet.
 - Remove http_transport_test.cc because there is no HTTPTransport
   implementation for Linux or Android yet.
 - Remove checked_address_range_test.cc because checked_address_range.cc
   does not yet expose a cross-bit usable type for addresses and sizes
   on Linux.

BUG=crashpad:30
TEST=crashpad_util_test

Change-Id: Ic17cf26bdf19b3eff3915bb1acdaa701f28222cd
Reviewed-on: https://chromium-review.googlesource.com/405647
Reviewed-by: Robert Sesek <rsesek@chromium.org>
2016-10-31 21:07:06 +00:00
Mark Mentovai
e956a8252f Port the util library to Android
With this change, it is possible to build crashpad_util for Android with
clang. I built with NDK 13b (clang 3.8) at API 24 (current), API 21
(used by Chrome in 64-bit builds), and API 16 (used by Chrome in 32-bit
builds).

 - In WeakFileHandleFileWriter::WriteIoVec(): Android does not expose
   the IOV_MAX macro, but its value can be obtained by calling
   sysconf(_SC_IOV_MAX).
 - In CloseMultipleNowOrOnExec(): API 21 removes getdtablesize(). Skip
   it, because it returned the same thing as sysconf(_SC_OPEN_MAX),
   which is already consulted.
 - Throughout: Various #ifdefs checking for OS_LINUX have been extended
   to also check for OS_ANDROID. In Chrome’s build_config.h (and thus
   mini_chromium’s), OS_LINUX is not defined when OS_ANDROID is.

This has not been tested beyond building the crashpad_util target.

BUG=crashpad:30

Change-Id: Ieb0bed736029d2d776c534e30e534f186e6fb663
Reviewed-on: https://chromium-review.googlesource.com/405267
Reviewed-by: Robert Sesek <rsesek@chromium.org>
2016-10-31 15:23:43 +00:00