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r311674 | hans | 2017-08-24 10:00:36 -0700 (Thu, 24 Aug 2017) | 3 lines
Mark allocator_oom_test.cc unsupported on arm & aarch64 (PR33972)
The buildbots don't seem to like it.
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/branches/release_50@311736 91177308-0d34-0410-b5e6-96231b3b80d8
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r311555 | oleg | 2017-08-23 07:26:31 -0700 (Wed, 23 Aug 2017) | 14 lines
[ARM][Compiler-rt] Fix AEABI builtins to correctly pass arguments to non-AEABI functions on HF targets
Summary:
This is a patch for PR34167.
On HF targets functions like `__{eq,lt,le,ge,gt}df2` and `__{eq,lt,le,ge,gt}sf2` expect their arguments to be passed in d/s registers, while some of the AEABI builtins pass them in r registers.
Reviewers: compnerd, peter.smith, asl
Reviewed By: peter.smith, asl
Subscribers: peter.smith, aemerson, dberris, javed.absar, llvm-commits, asl, kristof.beyls
Differential Revision: https://reviews.llvm.org/D36675
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/branches/release_50@311606 91177308-0d34-0410-b5e6-96231b3b80d8
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r311496 | hans | 2017-08-22 14:54:37 -0700 (Tue, 22 Aug 2017) | 1 line
[profile] Fix warning about C++ style comment in C file
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/branches/release_50@311584 91177308-0d34-0410-b5e6-96231b3b80d8
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r311495 | hans | 2017-08-22 14:54:37 -0700 (Tue, 22 Aug 2017) | 6 lines
[esan] Use stack_t instead of struct sigaltstack (PR34011)
The struct tag is going away in soon-to-be-released glibc 2.26 and the
stack_t typedef seems to have been there forever.
Patch by Bernhard Rosenkraenzer!
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/branches/release_50@311583 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/branches/release_50@308446 91177308-0d34-0410-b5e6-96231b3b80d8
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We now use __cpuidex intrinsics intead of inline asm on 32-bit Windows. We already used it on 64-bit.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308420 91177308-0d34-0410-b5e6-96231b3b80d8
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This reverts commit c8095ce74118dee8544b0f1ffaba8f46aa10215c.
Reverted due to some buildbot timeouts, perhaps due to 10.11 issues.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308395 91177308-0d34-0410-b5e6-96231b3b80d8
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This reverts commit 7e46d78d47832f03ce42adcf56417fbfd47cbaad.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308394 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Calling exit() from an atexit handler is undefined behavior.
On Linux, it's unavoidable, since we cannot intercept exit (_exit isn't called
if a user program uses return instead of exit()), and I haven't
seen it cause issues regardless.
However, on Darwin, I have a fairly complex internal test that hangs roughly
once in every 300 runs after leak reporting finishes, which is resolved with
this patch, and is presumably due to the undefined behavior (since the Die() is
the only thing that happens after the end of leak reporting).
In addition, this is the way TSan works as well, where an atexit handler+Die()
is used on Linux, and an _exit() interceptor is used on Darwin. I'm not sure if it's
intentionally structured that way in TSan, since TSan sets up the atexit handler and the
_exit() interceptor on both platforms, but I have observed that on Darwin, only the
_exit() interceptor is used, and on Linux the atexit handler is used.
There is some additional related discussion here: https://reviews.llvm.org/D35085
Reviewers: alekseyshl, kubamracek
Subscribers: eugenis, vsk, llvm-commits
Differential Revision: https://reviews.llvm.org/D35513
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308353 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
ASan/MSan/LSan allocators set errno on allocation failures according to
malloc/calloc/etc. expected behavior.
MSan allocator was refactored a bit to make its structure more similar
with other allocators.
Also switch Scudo allocator to the internal errno definitions.
TSan allocator changes will follow.
Reviewers: eugenis
Subscribers: llvm-commits, kubamracek
Differential Revision: https://reviews.llvm.org/D35275
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308344 91177308-0d34-0410-b5e6-96231b3b80d8
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These tests assume allocator_may_return_null=false
If allocator_may_return_null=true, gtest would not be able to switch it.
Tests needs to be re-implemented as lit tests.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308254 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
__DATA segments on Darwin contain a large number of separate sections,
most of which cannot actually contain pointers, and contain const values or
objc metadata. Only scanning sections which can contain pointers greatly improves
performance.
On a medium-sized (~4000 files) internal project, I saw a speedup of about 50%
in standalone LSan's execution time (50% improvement in the time spent running
LSan, not the total program time).
Reviewers: kcc, kubamracek, alekseyshl
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D35432
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308231 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Without them expressions like this may have different values.
(SANITIZER_INTERCEPT_MEMRCHR && SANITIZER_INTERCEPT_PREADV)
Reviewers: alekseyshl
Subscribers: srhines, kubamracek, llvm-commits
Differential Revision: https://reviews.llvm.org/D35512
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308228 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308221 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Introduce SI_NETBSD for NetBSD.
Add NetBSD support for appropriate `SANITIZER_INTERCEPT_*`.
Part of the code inspired by the original work on libsanitizer in GCC 5.4 by Christos Zoulas.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, dim, kcc, alekseyshl, filcab, eugenis, vitalybuka
Reviewed By: vitalybuka
Subscribers: srhines, kubamracek, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D35468
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308217 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Add defines for new NetBSD: SANITIZER_NETBSD,
it will be used across the codebase for sanitizers.
NetBSD is a POSIX-like platform, add it to SANITIZER_POSIX.
Part of the code inspired by the original work on libsanitizer in GCC 5.4 by Christos Zoulas.
Sponsored by <The NetBSD Foundation>
Reviewers: joerg, kcc, dim, alekseyshl, filcab, eugenis, vitalybuka
Reviewed By: kcc
Subscribers: kubamracek, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D35467
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308216 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary: This will allow sanitizer_procmaps on mac to expose section information.
Reviewers: kubamracek, alekseyshl, kcc
Subscribers: llvm-commits, emaste
Differential Revision: https://reviews.llvm.org/D35422
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308210 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308123 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308122 91177308-0d34-0410-b5e6-96231b3b80d8
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Test expects at least -O1 compiled runtime.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308121 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308120 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308117 91177308-0d34-0410-b5e6-96231b3b80d8
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says so
Differential Revision: https://reviews.llvm.org/D35400
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308072 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Set proper errno code on alloction failures and change some
implementations to satisfy their man-specified requirements:
LSan: valloc and memalign
ASan: pvalloc, memalign and posix_memalign
Changing both allocators in one patch since LSan depends on ASan allocator in some configurations.
Reviewers: vitalybuka
Subscribers: kubamracek, llvm-commits
Differential Revision: https://reviews.llvm.org/D35440
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308064 91177308-0d34-0410-b5e6-96231b3b80d8
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Set proper errno code on alloction failures and change valloc and
memalign implementations to satisfy their man-specified requirements.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308063 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Set proper errno code on alloction failure and change pvalloc and
posix_memalign implementation to satisfy their man-specified
requirements.
Reviewers: cryptoad
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D35429
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308053 91177308-0d34-0410-b5e6-96231b3b80d8
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This change implements 2 optimizations of sync clocks that reduce memory consumption:
Use previously unused first level block space to store clock elements.
Currently a clock for 100 threads consumes 3 512-byte blocks:
2 64-bit second level blocks to store clock elements
+1 32-bit first level block to store indices to second level blocks
Only 8 bytes of the first level block are actually used.
With this change such clock consumes only 2 blocks.
Share similar clocks differing only by a single clock entry for the current thread.
When a thread does several release operations on fresh sync objects without intervening
acquire operations in between (e.g. initialization of several fields in ctor),
the resulting clocks differ only by a single entry for the current thread.
This change reuses a single clock for such release operations. The current thread time
(which is different for different clocks) is stored in dirty entries.
We are experiencing issues with a large program that eats all 64M clock blocks
(32GB of non-flushable memory) and crashes with dense allocator overflow.
Max number of threads in the program is ~170 which is currently quite unfortunate
(consume 4 blocks per clock). Currently it crashes after consuming 60+ GB of memory.
The first optimization brings clock block consumption down to ~40M and
allows the program to work. The second optimization further reduces block consumption
to "modest" 16M blocks (~8GB of RAM) and reduces overall RAM consumption to ~30GB.
Measurements on another real world C++ RPC benchmark show RSS reduction
from 3.491G to 3.186G and a modest speedup of ~5%.
Go parallel client/server HTTP benchmark:
https://github.com/golang/benchmarks/blob/master/http/http.go
shows RSS reduction from 320MB to 240MB and a few percent speedup.
Reviewed in https://reviews.llvm.org/D35323
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308018 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
libsanitizer doesn't build against latest glibc anymore, see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81066 for details.
One of the changes is that stack_t changed from typedef struct sigaltstack { ... } stack_t; to typedef struct { ... } stack_t; for conformance reasons.
And the other change is that the glibc internal __need_res_state macro is now ignored, so when doing
```
#define __need_res_state
#include <resolv.h>
```
the effect is now the same as just
```
#include <resolv.h>
```
and thus one doesn't get just the
```
struct __res_state { ... };
```
definition, but newly also the
```
extern struct __res_state *__res_state(void) __attribute__ ((__const__));
```
prototype. So __res_state is no longer a type, but a function.
Reviewers: kcc, ygribov
Reviewed By: kcc
Subscribers: kubamracek
Differential Revision: https://reviews.llvm.org/D35246
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307969 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Secondary backed allocations do not require a cache. While it's not necessary
an issue when each thread has its cache, it becomes one with a shared pool of
caches (Android), as a Secondary backed allocation or deallocation holds a
cache that could be useful to another thread doing a Primary backed allocation.
We introduce an additional PRNG and its mutex (to avoid contention with the
Fallback one for Primary allocations) that will provide the `Salt` needed for
Secondary backed allocations.
I changed some of the code in a way that feels more readable to me (eg: using
some values directly rather than going through ternary assigned variables,
using directly `true`/`false` rather than `FromPrimary`). I will let reviewers
decide if it actually is.
An additional change is to mark `CheckForCallocOverflow` as `UNLIKELY`.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D35358
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307958 91177308-0d34-0410-b5e6-96231b3b80d8
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(compiler-rt)
Compiler-rt changes associated with: D34121
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307956 91177308-0d34-0410-b5e6-96231b3b80d8
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fields to avoid confusion. NFC.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307945 91177308-0d34-0410-b5e6-96231b3b80d8
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latest version of gcc
Summary:
We were missing many feature flags that newer gcc supports and we had our own set of feature flags that gcc didnt' support that were overlapping. Clang's implementation assumes gcc's features list so a mismatch here is problematic.
I've also matched the cpu type/subtype lists with gcc and removed all the cpus that gcc doesn't support. I've also removed the fallback autodetection logic that was taken from Host.cpp. It was the main reason we had extra feature flags relative to gcc. I don't think gcc does this in libgcc.
Once this support is in place we can consider implementing __builtin_cpu_is in clang. This could also be needed for function dispatching that Erich Keane is working on.
Reviewers: echristo, asbirlea, RKSimon, erichkeane, zvi
Reviewed By: asbirlea
Subscribers: dberris, llvm-commits
Differential Revision: https://reviews.llvm.org/D35214
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307878 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307869 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307868 91177308-0d34-0410-b5e6-96231b3b80d8
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On iOS/AArch64, the address space is very limited and has a dynamic maximum address based on the configuration of the device. We're already using a dynamic shadow, and we find a large-enough "gap" in the VM where we place the shadow memory. In some cases and some device configuration, we might not be able to find a large-enough gap: E.g. if the main executable is linked against a large number of libraries that are not part of the system, these libraries can fragment the address space, and this happens before ASan starts initializing.
This patch has a solution, where we have a "backup plan" when we cannot find a large-enough gap: We will restrict the address space (via MmapFixedNoAccess) to a limit, for which the shadow limit will fit.
Differential Revision: https://reviews.llvm.org/D35098
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307865 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307864 91177308-0d34-0410-b5e6-96231b3b80d8
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the instructions how to run them.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307844 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307839 91177308-0d34-0410-b5e6-96231b3b80d8
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Add Fuchsia support to some builtings and avoid building builtins
that are not and will never be used on Fuchsia.
Differential Revision: https://reviews.llvm.org/D34075
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307832 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307816 91177308-0d34-0410-b5e6-96231b3b80d8
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the return).
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307815 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
This follows the addition of `GetRandom` with D34412. We remove our
`/dev/urandom` code and use the new function. Additionally, change the PRNG for
a slightly faster version. One of the issues with the old code is that we have
64 full bits of randomness per "next", using only 8 of those for the Salt and
discarding the rest. So we add a cached u64 in the PRNG that can serve up to
8 u8 before having to call the "next" function again.
During some integration work, I also realized that some very early processes
(like `init`) do not benefit from `/dev/urandom` yet. So if there is no
`getrandom` syscall as well, we have to fallback to some sort of initialization
of the PRNG.
Now a few words on why XoRoShiRo and not something else. I have played a while
with various PRNGs on 32 & 64 bit platforms. Some results are below. LCG 32 & 64
are usually faster but produce respectively 15 & 31 bits of entropy, meaning
that to get a full 64-bit, you would need to call them several times. The simple
XorShift is fast, produces 32 bits but is mediocre with regard to PRNG test
suites, PCG is slower overall, and XoRoShiRo is faster than XorShift128+ and
produces full 64 bits.
%%%
root@tulip-chiphd:/data # ./randtest.arm
[+] starting xs32...
[?] xs32 duration: 22431833053ns
[+] starting lcg32...
[?] lcg32 duration: 14941402090ns
[+] starting pcg32...
[?] pcg32 duration: 44941973771ns
[+] starting xs128p...
[?] xs128p duration: 48889786981ns
[+] starting lcg64...
[?] lcg64 duration: 33831042391ns
[+] starting xos128p...
[?] xos128p duration: 44850878605ns
root@tulip-chiphd:/data # ./randtest.aarch64
[+] starting xs32...
[?] xs32 duration: 22425151678ns
[+] starting lcg32...
[?] lcg32 duration: 14954255257ns
[+] starting pcg32...
[?] pcg32 duration: 37346265726ns
[+] starting xs128p...
[?] xs128p duration: 22523807219ns
[+] starting lcg64...
[?] lcg64 duration: 26141304679ns
[+] starting xos128p...
[?] xos128p duration: 14937033215ns
%%%
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: aemerson, kristof.beyls, llvm-commits
Differential Revision: https://reviews.llvm.org/D35221
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307798 91177308-0d34-0410-b5e6-96231b3b80d8
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The stats are too dependent on implementation
and won't be relevant in future.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307786 91177308-0d34-0410-b5e6-96231b3b80d8
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1. Add SyncClock::ResetImpl which removes code
duplication between ctor and Reset.
2. Move SyncClock::Resize to SyncClock methods,
currently it's defined between ThreadClock methods.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307785 91177308-0d34-0410-b5e6-96231b3b80d8
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Pass ClockCache to ThreadClock::set and introduce ThreadCache::ResetCached.
For now both are unused, but will reduce future diffs.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307784 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307781 91177308-0d34-0410-b5e6-96231b3b80d8
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Improves crash message on dense alloc overflow.
Allows to understand what alloc overflowed.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307780 91177308-0d34-0410-b5e6-96231b3b80d8
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Don't create sync object if it does not exist yet. For example, an atomic
pointer is initialized to nullptr and then periodically acquire-loaded.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307778 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307777 91177308-0d34-0410-b5e6-96231b3b80d8
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The test should have been added in 289682
"tsan: allow Java VM iterate over allocated objects"
but I forgot to avn add.
Author: Alexander Smundak (asmundak)
Reviewed in https://reviews.llvm.org/D27720
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307776 91177308-0d34-0410-b5e6-96231b3b80d8
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