3 Commits

Author SHA1 Message Date
Mark Mentovai
385fe6615f posix: DCHECK for (addr + len) overflow in ScopedMmap::ResetAddrLen()
This also enhances ScopedMmapDeathTest.Mprotect to better ensure that
ScopedMmap::Mprotect() works properly.

Bug: crashpad:30
Test: crashpad_util_test ScopedMmap*.*
Change-Id: Iff35dba9fa993086f3f4cd8f4a862d802e637bb1
Reviewed-on: https://chromium-review.googlesource.com/464547
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
2017-03-31 16:23:21 +00:00
Mark Mentovai
aa2bc55777 posix: Allow ScopedMmap::ResetAddrLen() to deal with overlap
It should be possible to shrink a region already supervised by
ScopedMmap, or in rare cases when ScopedMmap is supervising only a
smaller portion of an overall larger region, increase the size of the
region it supervises. This is now equivalent to the operation of
base::mac::ScopedMachVM::reset().

The Reset() and ResetAddrLen() methods are upgraded from a void return
to a bool return to indicate their success.

Bug: crashpad:30
Test: crashpad_util_test ScopedMmap*.ResetAddrLen_*
Change-Id: I564e154cd2387e8df3f83b416ecc1c83c9bcf71d
Reviewed-on: https://chromium-review.googlesource.com/464286
Commit-Queue: Mark Mentovai <mark@chromium.org>
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
2017-03-31 02:54:23 +00:00
Mark Mentovai
96dc950eaf posix: Add ScopedMmap for managing memory-mapped regions
This wraps mmap(), munmap(), and mprotect().

Bug: crashpad:30
Test: crashpad_util_test ScopedMmap.*
Change-Id: If14363dfd00e314482cc91e53c7f4e3df737b0d3
Reviewed-on: https://chromium-review.googlesource.com/461361
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
2017-03-28 18:30:14 +00:00