diff options
author | Kostya Kortchinsky <kostyak@google.com> | 2017-10-30 17:56:24 +0000 |
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committer | Kostya Kortchinsky <kostyak@google.com> | 2017-10-30 17:56:24 +0000 |
commit | c714e4023336fcd72ee34b49d7dc102d9a1f4613 (patch) | |
tree | 17e404ac3196e2e45fb0678dd9e8f755938faba0 /lib/sanitizer_common/sanitizer_common.h | |
parent | c6577df3ffb9099626a0d8335c38a41362e11f66 (diff) |
Introduce ReservedAddressRange to sanitizer_common.
Summary:
Fixed version of https://reviews.llvm.org/D38437 (fixes Win/Fuchsia failures).
Creating a new revision, since the old one was getting a bit old/crowded.
In Fuchsia, MmapNoAccess/MmapFixedOrDie are implemented using a global
VMAR, which means that MmapNoAccess can only be called once. This works
for the sanitizer allocator but *not* for the Scudo allocator.
Hence, this changeset introduces a new ReservedAddressRange object to
serve as the new API for these calls. In this changeset, the object
still calls into the old Mmap implementations.
The next changeset two changesets will convert the sanitizer and scudo
allocators to use the new APIs, respectively. (ReservedAddressRange will
replace the SecondaryHeader in Scudo.)
Finally, a last changeset will update the Fuchsia implementation.
Reviewers: alekseyshl, cryptoad, phosek
Reviewed By: alekseyshl, cryptoad
Subscribers: kubamracek
Differential Revision: https://reviews.llvm.org/D39072
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@316934 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/sanitizer_common/sanitizer_common.h')
-rw-r--r-- | lib/sanitizer_common/sanitizer_common.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/sanitizer_common/sanitizer_common.h b/lib/sanitizer_common/sanitizer_common.h index ee5eca516..14b92d9c4 100644 --- a/lib/sanitizer_common/sanitizer_common.h +++ b/lib/sanitizer_common/sanitizer_common.h @@ -128,6 +128,20 @@ void CheckVMASize(); void RunMallocHooks(const void *ptr, uptr size); void RunFreeHooks(const void *ptr); +class ReservedAddressRange { + public: + uptr Init(uptr size, const char *name = nullptr, uptr fixed_addr = 0); + uptr Map(uptr fixed_addr, uptr size, bool tolerate_enomem = false); + void Unmap(uptr addr, uptr size); + void *base() const { return base_; } + uptr size() const { return size_; } + + private: + void* base_; + uptr size_; + const char* name_; +}; + typedef void (*fill_profile_f)(uptr start, uptr rss, bool file, /*out*/uptr *stats, uptr stats_size); |