ReadFile() attempted to continue reading after a short read. In most
cases, this is fine. However, ReadFile() would keep trying to fill a
partially-filled buffer until experiencing a 0-length read(), signaling
end-of-file. For certain weird file descriptors like terminal input, EOF
is an ephemeral condition, and attempting to read beyond EOF doesn’t
actually return 0 (EOF) provided that they remain open, it will block
waiting for more input. Consequently, ReadFile() and anything based on
ReadFile() had an undocumented and quirky interface, which was that any
short read that it returned (not an underlying short read) actually
indicated EOF.
This facet of ReadFile() was unexpected, so it’s being removed. The new
behavior is that ReadFile() will return an underlying short read. The
behavior of FileReaderInterface::Read() is updated in accordance with
this change.
Upon experiencing a short read, the caller can determine the best
action. Most callers were already prepared for this behavior. Outside of
util/file, only crashpad_database_util properly implemented EOF
detection according to previous semantics, and adapting it to new
semantics is trivial.
Callers who require an exact-length read can use the new
ReadFileExactly(), or the newly renamed LoggingReadFileExactly() or
CheckedReadFileExactly(). These functions will retry following a short
read. The renamed functions were previously called LoggingReadFile() and
CheckedReadFile(), but those names implied that they were simply
wrapping ReadFile(), which is not the case. They wrapped ReadFile() and
further, insisted on a full read. Since ReadFile()’s semantics are now
changing but these functions’ are not, they’re now even more distinct
from ReadFile(), and must be renamed to avoid confusion.
Test: *
Change-Id: I06b77e0d6ad8719bd2eb67dab93a8740542dd908
Reviewed-on: https://chromium-review.googlesource.com/456676
Reviewed-by: Robert Sesek <rsesek@chromium.org>
The database settings object’s last_upload_attempt_time (time_t) field
is switched from uint64_t to int64_t, for better compatibility with
time_t, which is normally a signed type. This change should be
transparent, as there should be no valid high-bit-set 64-bit timestamps
in this field in the wild.
A number of improvements are made to crashpad_database_util’s time
handling. Errors are checked during time conversion.
--set-last-upload-attempt-time=now is a new supported (and documented)
option.
A StringToNumber() overload for int64_t, along with a test, is added to
aid in crashpad_database_util’s time conversions from numeric strings. A
test is also added for the previously-untested uint64_t implementation.
TEST=crashpad_util_test StringNumberConversion.*
Change-Id: I089c4bf7b95f5df0982bdbb3c27b4f6a89db966e
Reviewed-on: https://chromium-review.googlesource.com/410068
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 .
Fixes two incorrect usages of ssize_t/off_t being implicitly converted
to bool. As such, I think it's worth the cost of the additional !! on
BOOL returning Win32 functions.
R=mark@chromium.org
Review URL: https://codereview.chromium.org/1408123006 .
Previously, any attempt to create a new crash report database would
result in this message being logged:
[p:t:yyyymmdd,hhmmss.uuuuuu:ERROR file_io.cc:30] read: expected 40,
observed 0
This would be the first thing that a developer embedding Crashpad into
their application would see after getting everything right. It doesn’t
exactly seem like everything’s right with that being logged. It would
also be the first thing that a user would see on stderr or in logs upon
launching a Crashpad-enabled application, which also seems kind of
dodgy.
The crash report database settings creation logic is restructured to
avoid logging this error when definitely creating a new database, while
retaining all other error logging.
BUG=crashpad:63
TEST=crashpad_database_util --database $new_db --show-client-id
(should not show any errors)
R=rsesek@chromium.org, scottmg@chromium.org
Review URL: https://codereview.chromium.org/1392953002 .
This makes it possible to #include "client/settings.h" for the interface
even on Windows. Although Settings is not currently implemented on
Windows (bug crashpad:13), it’s easier to have the interface declaration
available without having to have it be guarded.
TEST=crashpad_client_test SettingsTest.*
BUG=
R=rsesek@chromium.org
Review URL: https://codereview.chromium.org/987383002
