After 6083a2706d55, it is possible to determine the expected size of a
versioned structure such as dyld_all_image_infos. The expected size is
compared against the actual size of the structure as returned by
task_info() (TASK_DYLD_INFO).
TEST=crashpad_snapshot_test
R=rsesek@chromium.org
Review URL: https://codereview.chromium.org/1272283004 .
Also, move ProcessArgumentsForPID() into ProcessInfo.
This change prepares for a TaskForPID() implementation that’s capable of
operating correctly in a setuid root executable. TaskForPID() belongs in
util/mach, but for its permission checks, it must access some process
properties that were previously fetched by ProcessReader in snapshot.
util can’t depend on snapshot. The generic util-safe process information
bits (Is64Bit(), ProcessID(), ParentProcessID(), and StartTime()) are
moved from ProcessReader to ProcessInfo (in util), where the current
ProcessReader can use it (as it’s OK for snapshot to depend on util),
and the future TaskForPID() in util can also use it. ProcessInfo also
contains other methods that TaskForPID() will use, providing access to
the credentials that the target process holds. ProcessArgumentsForPID()
is related, and is also now a part of ProcessInfo.
TEST=snapshot_test, util_test
R=rsesek@chromium.org
Review URL: https://codereview.chromium.org/727973002
