Commit Graph

16 Commits

Author SHA1 Message Date
Dan Liew 4dd0bf9487 On Darwin allow for sanitizer malloc implementations to provide a zone
enumerator.

This is done by defining `COMMON_MALLOC_HAS_ZONE_ENUMERATOR` to `1` and
then by providing an implementation of the `mi_enumerator(...)` function.
If a custom implementation isn't desired the macro is set to `0` which
causes a stub version (that fails) to be used.

Currently all Darwin sanitizers that have malloc implementations define
this to be `0` so there is no functionality change.

rdar://problem/45284065

llvm-svn: 351711
2019-01-21 01:41:01 +00:00
Chandler Carruth 2946cd7010 Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
2019-01-19 08:50:56 +00:00
Dan Liew f101eb101d Add new `__sanitizer_mz_default_zone()` API which returns the address of the ASan malloc zone. This API will be used for testing in future patches.
Summary:
The name of the function is based on `malloc_default_zone()` found
in Darwin's `malloc/malloc.h` header file.

Reviewers: kubamracek, george.karpenkov

Subscribers: #sanitizers, llvm-commits

Differential Revision: https://reviews.llvm.org/D55064

llvm-svn: 348481
2018-12-06 12:39:00 +00:00
Dan Liew 7383b4fba4 Introduce `sanitizer_malloc_introspect_t` for Darwin which is a sub-class of Darwin's `malloc_introspection_t` and use it when setting up the malloc zone.
Summary:
Currently `sanitizer_malloc_introspection_t` just adds a version field
which is used to version the allocator ABI. The current allocator ABI
version is returned by the new `GetMallocZoneAllocatorEnumerationVersion()` function.

The motivation behind this change is to allow external processes to
determine the allocator ABI of a sanitized process.

rdar://problem/45284065

Reviewers: kubamracek, george.karpenkov, vitalybuka

Subscribers: #sanitizers, llvm-commits

Differential Revision: https://reviews.llvm.org/D54045

llvm-svn: 346420
2018-11-08 17:50:34 +00:00
Dan Liew a8eaaa8006 [NFC] Refactor initialisation of Darwin malloc zone fields into separate function called `InitMallocZoneFields()` which is now called from `ReplaceSystemMalloc()`.
Summary:
The motivation here is to be able support initialisation of the
malloc zone on other code paths.

rdar://problem/45284065

Reviewers: kubamracek, george.karpenkov

Subscribers: llvm-commits, #sanitizers

Differential Revision: https://reviews.llvm.org/D54037

llvm-svn: 345983
2018-11-02 15:28:11 +00:00
Vitaly Buka f791c9659b [sanitizer] Fix Darwin build
llvm-svn: 328417
2018-03-24 08:13:18 +00:00
Vitaly Buka 8616363017 Mmap interceptor providing mprotect support
Summary:
- Intercepting mprotect calls.
- Fixing forgotten flag check.

Patch by David CARLIER

Reviewers: vitalybuka, vsk

Subscribers: delcypher, srhines, kubamracek, llvm-commits, #sanitizers

Differential Revision: https://reviews.llvm.org/D44777

llvm-svn: 328415
2018-03-24 07:45:24 +00:00
Alex Shlyapnikov 79a7c4fe73 [Sanitizers] Add more standard compliant posix_memalign implementation for LSan.
Summary:
Add more standard compliant posix_memalign implementation for LSan and
use corresponding sanitizer's posix_memalign implenetations in allocation
wrappers on Mac.

Reviewers: eugenis, fjricci

Subscribers: kubamracek, delcypher, #sanitizers, llvm-commits

Differential Revision: https://reviews.llvm.org/D44335

llvm-svn: 327338
2018-03-12 21:59:06 +00:00
Francis Ricci e32a66b2de Free zone name when destroying malloc zone
Summary:
The darwin interceptor for malloc_destroy_zone manually frees the
zone struct, but does not free the name component. Make sure to
free the name if it has been set.

Reviewers: kubamracek, alekseyshl

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D31983

llvm-svn: 300195
2017-04-13 14:00:24 +00:00
Kuba Mracek 1c002267fb [sanitizer] Make sure libmalloc doesn't remove the sanitizer zone from malloc_zones[0]
In certain OS versions, it was possible that libmalloc replaced the sanitizer zone from being the default zone (i.e. being in malloc_zones[0]). This patch introduces a failsafe that makes sure we always stay the default zone. No testcase for this, because this doesn't reproduce under normal circumstances.

Differential Revision: https://reviews.llvm.org/D27083

llvm-svn: 289376
2016-12-11 08:45:36 +00:00
Kuba Mracek b93f78128f [sanitizer] Handle malloc_destroy_zone() on Darwin
We currently have a interceptor for malloc_create_zone, which returns a new zone that redirects all the zone requests to our sanitizer zone. However, calling malloc_destroy_zone on that zone will cause libmalloc to print out some warning messages, because the zone is not registered in the list of zones. This patch handles this and adds a testcase for that.

Differential Revision: https://reviews.llvm.org/D27083

llvm-svn: 289375
2016-12-11 08:42:42 +00:00
Alexander Potapenko b6a2537c60 [libsanitizer] Fix bugs and wiki links to point to GitHub.
llvm-svn: 254738
2015-12-04 17:50:03 +00:00
Alexander Potapenko 6f3fa20c76 [ASan] Retire mac_ignore_invalid_free, remove some dead code.
mac_ignore_invalid_free was helpful when ASan runtime used to intercept
CFAllocator and sometimes corrupted its memory. This behavior had been long
gone, and the flag was unused.
This patch also deletes ReportMacCfReallocUnknown(), which was used by the
CFAllocator realloc() wrapper.

llvm-svn: 254722
2015-12-04 16:17:55 +00:00
Kuba Brecka ba85da8482 [asan] Remove system_malloc_zone
This seems to be dead code – `system_malloc_zone` is initialized as null and we never assign to it. This code is apparently currently never executed (in ASan), but is causes trouble for the TSan OS X port. Let's replace the checks with `COMMON_MALLOC_ENTER` (`ENSURE_ASAN_INITED()`).

Differential Revision: http://reviews.llvm.org/D14334

llvm-svn: 252876
2015-11-12 11:29:21 +00:00
Kuba Brecka ef731a9edc Whitespace fixup for r252052. NFC.
llvm-svn: 252053
2015-11-04 15:57:38 +00:00
Kuba Brecka 465cb8a6fa [tsan] Use malloc zone interceptors on OS X, part 1 (refactoring)
TSan needs to use a custom malloc zone on OS X, which is already implemented in ASan.  This patch is a refactoring patch (NFC) that extracts this from ASan into sanitizer_common, where we can reuse it in TSan.

Reviewed at http://reviews.llvm.org/D14330

llvm-svn: 252052
2015-11-04 15:43:45 +00:00