Commit Graph

48 Commits

Author SHA1 Message Date
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
Walter Lee ed8b52c8bc [asan] Avoid assert failure for non-default shadow scale
Rather than assertion failing, we can fall back to the
non-optimized version which works for any shadow scale.

Differential Revision: https://reviews.llvm.org/D39474

llvm-svn: 318460
2017-11-16 22:02:58 +00:00
Vitaly Buka 83832fe7db [asan] Complete the Fuchsia port
Submitted on behalf of Roland McGrath.

Reviewers: kcc, eugenis, alekseyshl, vitalybuka

Reviewed By: vitalybuka

Subscribers: filcab, vitalybuka, srhines, kubamracek, mgorny, phosek, llvm-commits

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D35865

llvm-svn: 310431
2017-08-09 00:21:45 +00:00
Etienne Bergeron 61ba38c8dd fix random typos [NFC]
llvm-svn: 277850
2016-08-05 18:49:08 +00:00
Etienne Bergeron 48933772f7 [asan] Fix shifting compiler warnings when compiler in 64-bits
Summary:
The MSVC compiler complains about implicit conversion of 32-bits constant to
64-bit when using this shiting pattern  1 << (<64-bit expr>).

Reviewers: rnk

Subscribers: kcc, llvm-commits, wang0109, kubabrecka, chrisha

Differential Revision: http://reviews.llvm.org/D21524

llvm-svn: 273267
2016-06-21 14:53:16 +00:00
Vedant Kumar f7ed23f744 [compiler-rt] Fix build (again) by wrapping lines to 80 chars (NFC)
llvm-svn: 248979
2015-10-01 02:15:40 +00:00
Vedant Kumar 59ba7b8cd1 [compiler-rt] Apply modernize-use-nullptr fixes in sanitizers
- Trim spaces.
- Use nullptr in place of 0 for pointer variables.
- Use '!p' in place of 'p == 0' for null pointer checks.
- Add blank lines to separate function definitions.
- Add 'extern "C"' or 'namespace foo' comments after the appropriate
  closing brackets

This is a continuation of work from 409b7b82. The focus here is on the
various sanitizers (not sanitizer_common, as before).

Patch by Eugene Zelenko!

Differential Revision: http://reviews.llvm.org/D13225

llvm-svn: 248966
2015-10-01 00:22:21 +00:00
Rafael Espindola cc45ee9a63 Try to fix the MSVC build now that we use /Zc:inline.
Thanks to Majnemer for the help.

llvm-svn: 244786
2015-08-12 18:09:44 +00:00
Yury Gribov 63d9764585 [ASan] New approach to dynamic allocas unpoisoning. Patch by Max Ostapenko!
Differential Revision: http://reviews.llvm.org/D7098

llvm-svn: 238401
2015-05-28 07:49:05 +00:00
Evgeniy Stepanov f074b3c2de [asan] Allow changing verbosity in activation flags.
This change removes some debug output in asan_flags.cc that
was reading the verbosity level before all the flags were parsed.

llvm-svn: 226566
2015-01-20 13:21:20 +00:00
Alexey Samsonov 0545f4b0f3 [ASan] Change fake stack and local variables handling.
This commit changes the way we get fake stack from ASan runtime
(to find use-after-return errors) and the way we represent local
variables:
  - __asan_stack_malloc function now returns pointer to newly allocated
    fake stack frame, or NULL if frame cannot be allocated. It doesn't
    take pointer to real stack as an input argument, it is calculated
    inside the runtime.
  - __asan_stack_free function doesn't take pointer to real stack as
    an input argument. Now this function is never called if fake stack
    frame wasn't allocated.
  - __asan_init version is bumped to reflect changes in the ABI.
  - new flag "-asan-stack-dynamic-alloca" allows to store all the
    function local variables in a dynamic alloca, instead of the static
    one. It reduces the stack space usage in use-after-return mode
    (dynamic alloca will not be called if the local variables are stored
    in a fake stack), and improves the debug info quality for local
    variables (they will not be described relatively to %rbp/%rsp, which
    are assumed to be clobbered by function calls). This flag is turned
    off by default for now, but I plan to turn it on after more
    testing.

llvm-svn: 224063
2014-12-11 21:53:19 +00:00
Jay Foad e47130e407 [ASan] Get fake stack code working with GCC 4.8.2.
Summary:
TestCases/Linux/heavy_uar_test.cc was failing on my
PowerPC64 box with GCC 4.8.2, because the compiler recognised
a memset-like loop and turned it into a call to memset, which
got intercepted by __asan_memset, which got upset because it was
being called on an address in high shadow memory.

Use break_optimization to stop the compiler from doing this.

Reviewers: kcc, samsonov

Reviewed By: kcc

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D6266

llvm-svn: 222572
2014-11-21 21:25:09 +00:00
Kostya Serebryany 1ee681305f [asan] introduce two functions that will allow implementations of C++ garbage colection to work with asan's fake stack
llvm-svn: 200908
2014-02-06 06:56:22 +00:00
Kostya Serebryany 1aedf6c9e6 [asan] replace the flag uar_stack_size_log with two flags min_uar_stack_size_log/max_uar_stack_size_log
llvm-svn: 197370
2013-12-16 08:42:08 +00:00
Kostya Serebryany 57bfdb080b [asan] add flag uar_noreserve to use noreserve mmap for fake stack. uar_noreserve=1 will save some memory but also negatively affect performance
llvm-svn: 197233
2013-12-13 15:03:49 +00:00
Kostya Serebryany e55d388e71 [asan] when a fake stack is being unmapped also flush the corresponding shadow
llvm-svn: 197040
2013-12-11 14:26:41 +00:00
Kostya Serebryany 7a3a93f112 [asan] if verbosity>=2, print the fake stack usage stats at thread exit; No functionality change in non-verboze mode
llvm-svn: 197037
2013-12-11 13:54:01 +00:00
Sergey Matveev 9be70fbda9 [sanitizer] Introduce VReport and VPrintf macros and use them in sanitizer code.
Instead of "if (common_flags()->verbosity) Report(...)" we now have macros.

llvm-svn: 196497
2013-12-05 12:04:51 +00:00
Dmitry Vyukov 52ca74ec61 tsan: move verbosity flag to CommonFlags
llvm-svn: 192701
2013-10-15 13:28:51 +00:00
Sergey Matveev 43d90cbd86 [lsan] Support ASan's stack-use-after-return mode in LSan.
Treat the fake stack as live memory.

llvm-svn: 192593
2013-10-14 14:04:50 +00:00
Kostya Serebryany 3c42ce1516 [asan] introduce run-time flag uar_stack_size_log to control the size of FakeStack; don't crash when the fake stack is exhausted, move some code to .cc file
llvm-svn: 191510
2013-09-27 11:37:23 +00:00
Kostya Serebryany c3d43ca3ec [asan] add a run-time option detect_stack_use_after_return, add verbosity output for fake stack
llvm-svn: 190932
2013-09-18 10:35:12 +00:00
Kostya Serebryany 2f5c2be6bd [asan] further speedup use-after-return: simplify deallocation of fake frames. ~ 20% speedup.
llvm-svn: 190852
2013-09-17 07:42:54 +00:00
Kostya Serebryany 3bee8efc95 [asan] Android does not have TLS
llvm-svn: 190669
2013-09-13 08:58:22 +00:00
Kostya Serebryany 9583b87077 [asan] don't record the class_id in FakeFrame (scratching the last bits of performance)
llvm-svn: 190666
2013-09-13 07:50:44 +00:00
Kostya Serebryany 4117bdbbbc [asan] more performance to FakeStack: a) don't used atomic exchange, instead rely on regular load and store and other signal-safe logic; b) remove allocated_from_size_class_mask_ which is not helping much anyway; Another 10% speedup
llvm-svn: 190664
2013-09-13 07:20:35 +00:00
Kostya Serebryany 43c4493b44 [asan] second attempt to use TLS with fake stack. This time it looks (more) async-signal safe.
llvm-svn: 190663
2013-09-13 06:32:26 +00:00
Kostya Serebryany c19851ab6c [asan] undo the previous commit since TLS hack breaks with signals... :(
llvm-svn: 190662
2013-09-13 06:15:02 +00:00
Kostya Serebryany 096413ba3b [asan] use TLS on Linux to get the FakeStack. Saves 15% performance
llvm-svn: 190661
2013-09-13 06:04:18 +00:00
Kostya Serebryany 77caab4d7b [asan] inline PoisonShadow in FakeStack to get ~10% speedup
llvm-svn: 190660
2013-09-13 05:57:58 +00:00
Kostya Serebryany 7638aa135e [asan] a bit of performance improvement in fake stack, generalized one test, fixed android build of another test
llvm-svn: 190606
2013-09-12 14:41:10 +00:00
Kostya Serebryany 627ea6391e [asan] add a test for use-after-return and exceptions and fix it. Not 100% sure this is a complete fix, will keep looking for harder cases.
llvm-svn: 190603
2013-09-12 13:25:29 +00:00
Kostya Serebryany 628cda7367 [asan] hopefully make the FakeStack async-signal safe, enable the related test
llvm-svn: 190592
2013-09-12 08:34:50 +00:00
Kostya Serebryany e8f961e847 [asan] use xchg instead of CAS in FakeStack::Allocate (5% faster for this case)
llvm-svn: 190589
2013-09-12 07:28:42 +00:00
Kostya Serebryany 729c8dc65b [asan] fully re-implement the FakeStack (use-after-return) to make it faster and async-signal-safe. The implementation is not yet complete (see FIXMEs) but the existing tests pass.
llvm-svn: 190588
2013-09-12 07:11:58 +00:00
Kostya Serebryany 8fc35ca008 [asan] refactor the use-after-return API so that the size class is computed at compile time instead of at run-time. compiler-rt part
llvm-svn: 190406
2013-09-10 13:16:26 +00:00
Kostya Serebryany 1f13414d45 [asan] make use-after-return handle very deep recursion; fixes 483.xalancbmk in UAR mode
llvm-svn: 189929
2013-09-04 10:59:32 +00:00
Kostya Serebryany fab9336413 [asan]: fix a CHECK failure in use-after-return mode; enable and fix stack-use-after-return.cc; add a test for UAR mode in asan_noinst_test
llvm-svn: 189457
2013-08-28 08:59:23 +00:00
Evgeniy Stepanov d8a1798b47 [asan] Limit fake stack size to a reasonable value when running with unlimited stack.
llvm-svn: 187411
2013-07-30 11:50:26 +00:00
Kostya Serebryany 6a068a715d [asan] initialize fake_stack lazily and increase its maximal size. This makes -fsanitize=address,use-after-return more robust: all SPEC tests pass now. In the default mode thread stacks become a bit smaller.
llvm-svn: 184934
2013-06-26 12:16:05 +00:00
Timur Iskhodzhanov cc61eefd4b Fix MSVC W3 compiler warnings
llvm-svn: 182857
2013-05-29 14:11:44 +00:00
Kostya Serebryany 1c77de3aeb [asan] improve the UAR reporting (try harder to find the correct frame), try to make the test more stable
llvm-svn: 179292
2013-04-11 15:35:40 +00:00
Kostya Serebryany 5b4267f7e7 [sanitizer] found a bug by code inspection: CHECK(a=b) instead of CHECK(a==b). Was puzzled why lint did not catch it. Turns out this check was disabled for asan source. fix all cases and enable the check
llvm-svn: 178872
2013-04-05 14:40:25 +00:00
Alexey Samsonov a88c60b085 [ASan] Speed-up initialization-order checking: create and use fast versions of PoisonShadow functions, store copies of __asan_global descriptors in a vector instead of list of pointers. This gives 3x speedup on both benchmarks and real binaries with lots of globals.
llvm-svn: 178239
2013-03-28 15:42:43 +00:00
Alexey Samsonov 54afba8b62 [ASan] Switch ASan to generic ThreadRegistry from sanitizer_common. Delete ASan-specific AsanThreadRegistry.
llvm-svn: 177634
2013-03-21 11:23:41 +00:00
Alexey Samsonov cf025cb2e6 [ASan] Move GetCurrentThread/SetCurrentThread from AsanThreadRegistry class into plain functions: they don't actually use registry
llvm-svn: 177501
2013-03-20 09:23:28 +00:00
Alexey Samsonov a0c0da8f51 [ASan] Split ASan interface header into private and public parts. Add a test that makes sure users can include interface header
llvm-svn: 174058
2013-01-31 13:46:14 +00:00
Kostya Serebryany 13bdbe698e [asan] move FakeStack into a separate file
llvm-svn: 169734
2012-12-10 14:19:15 +00:00