Commit Graph

30 Commits

Author SHA1 Message Date
Matt Morehouse a612b5adb7 [MSan] Introduce __msan_unpoison_param().
Summary:
This allows libFuzzer to unpoison parameter shadow before calling
LLVMFuzzerTestOneInput to eliminate the false positives described
in https://github.com/google/oss-fuzz/issues/2369.

Reviewers: eugenis

Reviewed By: eugenis

Subscribers: llvm-commits, metzman, kcc

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D61751

llvm-svn: 360379
2019-05-09 21:50:57 +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
Matt Morehouse 373d6ed7cf [MSan] Add functions to enable/disable interceptor checks.
Summary:
The motivation for this change is to make libFuzzer+MSan possible
without instrumenting libFuzzer.

See https://github.com/google/sanitizers/issues/958.

Reviewers: eugenis

Reviewed By: eugenis

Subscribers: llvm-commits, kcc

Differential Revision: https://reviews.llvm.org/D48890

llvm-svn: 336447
2018-07-06 17:10:51 +00:00
Petr Hosek 016d18c61a [sanitizer] Make function declarations C-compatible
The public sanitizer headers are intended to be usable from either
C++ or C, but they declare no-argument functions with the syntax that
is not a proper prototype declaration in C. This goes unnoticed until
someone uses -Wsystem-headers.

Patch By: mcgrathr

Reviewers: phosek, vitalybuka

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D41475

llvm-svn: 321305
2017-12-21 20:51:16 +00:00
Evgeniy Stepanov c7ee62c561 [msan] Add __msan_copy_shadow interface function.
This can be used to annotate copies of memory that are not observed by MSan.

llvm-svn: 250124
2015-10-12 23:20:24 +00:00
Alexey Samsonov 540ac1aab4 [MSan] Deprecate __msan_set_death_callback() in favor of __sanitizer_set_death_callback().
llvm-svn: 245754
2015-08-21 22:45:12 +00:00
Alexey Samsonov bb79b06f4e [Sanitizers] Unify the semantics and usage of "exitcode" runtime flag across all sanitizers.
Summary:
Merge "exitcode" flag from ASan, LSan, TSan and "exit_code" from MSan
into one entity. Additionally, make sure sanitizer_common now uses the
value of common_flags()->exitcode when dying on error, so that this
flag will automatically work for other sanitizers (UBSan and DFSan) as
well.

User-visible changes:
* "exit_code" MSan runtime flag is now deprecated. If explicitly
  specified, this flag will take precedence over "exitcode".
  The users are encouraged to migrate to the new version.
* __asan_set_error_exit_code() and __msan_set_exit_code() functions
  are removed. With few exceptions, we don't support changing runtime
  flags during program execution - we can't make them thread-safe.
  The users should use __sanitizer_set_death_callback()
  that would call _exit() with proper exit code instead.
* Plugin tools (LSan and UBSan) now inherit the exit code of the parent
  tool. In particular, this means that ASan would now crash the program
  with exit code "1" instead of "23" if it detects leaks.

Reviewers: kcc, eugenis

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D12120

llvm-svn: 245734
2015-08-21 20:49:37 +00:00
Naomi Musgrave 9a5e3922bf re-added changes due to svn config setting issues
llvm-svn: 242589
2015-07-17 23:28:00 +00:00
Evgeniy Stepanov 504f0987fe [msan] Fix MsanTest to pass in track_origins=2 mode.
llvm-svn: 230639
2015-02-26 15:19:33 +00:00
Evgeniy Stepanov 84adb5d1d0 [msan] Refactor shadow operations.
Move a bunch of functions to a new source file and rename some of them for
consistency. No functional changes.

llvm-svn: 226673
2015-01-21 16:42:30 +00:00
Alexey Samsonov b9ec65cd4d [Sanitizer] Kill deprecated allocator interfaces in ASan, MSan and TSan in favor of
a unified interface in <sanitizer/allocator_interface.h>.

llvm-svn: 215469
2014-08-12 20:28:20 +00:00
Alexey Samsonov 91bb8e0e3a Generalize sanitizer allocator public interface.
Introduce new public header <sanitizer/allocator_interface.h> and a set
of functions __sanitizer_get_ownership(), __sanitizer_malloc_hook() etc.
that will eventually replace their tool-specific equivalents
(__asan_get_ownership(), __msan_get_ownership() etc.). Tool-specific
functions are now deprecated and implemented as stubs redirecting
to __sanitizer_ versions (which are implemented differently in each tool).

Replace all uses of __xsan_ versions with __sanitizer_ versions in unit
and lit tests.

llvm-svn: 212469
2014-07-07 17:39:31 +00:00
Evgeniy Stepanov 208aae8ee0 [msan] Chained origins re-design.
Generalize StackDepot and create a new specialized instance of it to
efficiently (i.e. without duplicating stack trace data) store the
origin history tree.

This reduces memory usage for chained origins roughly by an order of
magnitude.

Most importantly, this new design allows us to put two limits on
stored history data (exposed in MSAN_OPTIONS) that help avoid
exponential growth in used memory on certain workloads.

See comments in lib/msan/msan_origin.h for more details.

llvm-svn: 209284
2014-05-21 09:02:13 +00:00
Evgeniy Stepanov fe250b0014 [msan] Prettify __msan_print_shadow.
Makes __msan_print_shadow output much more readable, adds origin info.

llvm-svn: 207622
2014-04-30 09:50:30 +00:00
Evgeniy Stepanov 2dcb5c0a2c [msan] Kill __msan_print_param_shadow.
It does not do what it's name says, and what it actually does is hard to
describe, and is not useful at all.

llvm-svn: 205415
2014-04-02 11:55:24 +00:00
Evgeniy Stepanov 80cb930c09 [msan] Add __msan_check_mem_is_initialized.
An assert()-like function that checks that a memory range is fully initialized.

llvm-svn: 205413
2014-04-02 11:50:42 +00:00
Evgeniy Stepanov 89602651e8 [msan] Implement __msan_set_death_callback.
llvm-svn: 204926
2014-03-27 14:04:58 +00:00
Sergey Matveev fa76f3b3a5 [MSan] Add __msan_unpoison_string() to the public interface.
Using __msan_unpoison() on null-terminated strings is awkward because
strlen() can't be called on a poisoned string. This case warrants a special
interface function.

llvm-svn: 204448
2014-03-21 10:12:17 +00:00
Evgeniy Stepanov e0e980c748 [msan] Remove stubs for non-instrumented code from msan interface header.
llvm-svn: 201777
2014-02-20 11:43:00 +00:00
Evgeniy Stepanov fc0ba53531 [msan] Fix an incorrect comment.
llvm-svn: 199300
2014-01-15 06:49:40 +00:00
Evgeniy Stepanov 2b31d7186e [msan] Make all pointers in msan_interface "const volatile void *".
This way msan annotations can be used with both normal and volatile memory.

llvm-svn: 190403
2013-09-10 11:54:51 +00:00
Evgeniy Stepanov df96e863de [msan] bool -> int to make msan_interface.h C-compatible.
llvm-svn: 190402
2013-09-10 11:04:37 +00:00
Evgeniy Stepanov 44b77c26e4 [msan] Allocator statistics interface and malloc hooks.
llvm-svn: 187653
2013-08-02 14:26:58 +00:00
Evgeniy Stepanov ae4e1ec4e6 [msan] Add keep_going runtime flag.
llvm-svn: 184542
2013-06-21 12:37:58 +00:00
Alexey Samsonov 34093f0de8 [MSan] Make a few interface functions accept 'const void *' instead of 'void*'
llvm-svn: 180102
2013-04-23 13:34:19 +00:00
Evgeniy Stepanov 358698279d [sanitizer] Further split private and public sanitizer headers.
And make msan_interface.h C-compatible.

llvm-svn: 173928
2013-01-30 13:12:08 +00:00
Evgeniy Stepanov 5725e5b715 [msan] Remove an extra #ifdef.
__has_feature is always defined at this point.

llvm-svn: 173920
2013-01-30 09:56:11 +00:00
Evgeniy Stepanov eac7f934f0 [msan] Cleanup public interface header.
Moved everything users are not supposed to use to a private interface header.
Documented all public interfaces. Made them safe to use even if built without
MemorySanitizer.

llvm-svn: 173800
2013-01-29 14:33:29 +00:00
Evgeniy Stepanov 9f7e8c1433 [msan] A runtime call to support custom allocators.
llvm-svn: 173687
2013-01-28 13:52:49 +00:00
Evgeniy Stepanov 375aec7476 [msan] Add a missing file from r169858.
llvm-svn: 169860
2012-12-11 12:44:43 +00:00