Commit Graph

8 Commits

Author SHA1 Message Date
Siva Annamalai 90750551f2 1. Avoid potential dead lock due to lock-order-inversion
WARNING: ThreadSanitizer: lock-order-inversion (potential deadlock) (pid=3448)
  Cycle in lock order graph: M206 (0x7b18000006c0) => M202 (0x7b0c00000ff0) => M206

  Mutex M202 acquired here while holding mutex M206 in thread T5:
    #0 pthread_mutex_lock <null> (dart+0x00000058e8ee)
    #1 dart::Mutex::Lock() /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/os_thread_linux.cc:274 (dart+0x0000009bd79b)
    #2 MutexLocker /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/lockers.h:61 (dart+0x00000074a007)
    #3 dart::FreeList::TryAllocate(long, bool) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/freelist.cc:65 (dart+0x000000872d2c)
    #4 dart::PageSpace::TryAllocateInternal(long, dart::HeapPage::PageType, dart::PageSpace::GrowthPolicy, bool, bool) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/pages.cc:392 (dart+0x0000009c0180)
    #5 dart::PageSpace::TryAllocate(long, dart::HeapPage::PageType, dart::PageSpace::GrowthPolicy) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/pages.h:195 (dart+0x000000877158)
    #6 dart::Heap::AllocateOld(long, dart::HeapPage::PageType) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/heap.cc:92 (dart+0x000000876f45)
    #7 dart::Heap::Allocate(long, dart::Heap::Space) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/heap.h:67 (dart+0x00000092ab33)

  Mutex M206 acquired here while holding mutex M202 in thread T5:
    #0 pthread_mutex_lock <null> (dart+0x00000058e8ee)
    #1 dart::Monitor::Enter() /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/os_thread_linux.cc:380 (dart+0x0000009be02b)
    #2 MonitorLocker /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/lockers.h:139 (dart+0x000000722f17)
    #3 SweeperTask /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/gc_sweeper.cc:112 (dart+0x000000b3391f)
    #4 dart::GCSweeper::SweepConcurrent(dart::Isolate*, dart::HeapPage*, dart::HeapPage*, dart::FreeList*) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/gc_sweeper.cc:171 (dart+0x000000b336e6)
    #5 dart::PageSpace::MarkSweep(bool) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/pages.cc:952 (dart+0x0000009c1f6b)
    #6 dart::Heap::CollectOldSpaceGarbage(dart::Thread*, dart::Heap::ApiCallbacks, dart::Heap::GCReason) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/heap.cc:401 (dart+0x000000878e11)
    #7 dart::Heap::CollectAllGarbage() /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/heap.cc:444 (dart+0x000000877244)
    #8 dart::Heap::AllocateOld(long, dart::HeapPage::PageType) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/heap.cc:102 (dart+0x000000876fac)
    #9 dart::Heap::Allocate(long, dart::Heap::Space) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/heap.h:67 (dart+0x00000092ab33)

2. Remove unsafe access to usage data for an insignificant ASSERT.
WARNING: ThreadSanitizer: data race (pid=7617)
  Atomic write of size 8 at 0x7b840000fdf0 by thread T4:
    #0 __tsan_atomic64_fetch_add <null> (dart+0x0000005b59e7)
    #1 dart::AtomicOperations::IncrementBy(long*, long) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/atomic_linux.h:30 (dart+0x00000076a235)
    #2 dart::PageSpace::TryAllocateInternal(long, dart::HeapPage::PageType, dart::PageSpace::GrowthPolicy, bool, bool) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/pages.cc:398 (dart+0x0000009c0233)
    #3 dart::PageSpace::TryAllocate(long, dart::HeapPage::PageType, dart::PageSpace::GrowthPolicy) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/pages.h:195 (dart+0x000000877158)
    #4 dart::Heap::AllocateOld(long, dart::HeapPage::PageType) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/heap.cc:82 (dart+0x000000876eec)
    #5 dart::Heap::Allocate(long, dart::Heap::Space) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/heap.h:67 (dart+0x00000092ab33)
    #6 dart::Object::Allocate(long, long, dart::Heap::Space) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/object.cc:1866 (dart+0x00000092dd92)

  Previous read of size 8 at 0x7b840000fdf0 by thread T3:
    #0 dart::PageSpace::TryAllocateInternal(long, dart::HeapPage::PageType, dart::PageSpace::GrowthPolicy, bool, bool) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/pages.cc:426 (dart+0x0000009c026b)
    #1 dart::PageSpace::TryAllocate(long, dart::HeapPage::PageType, dart::PageSpace::GrowthPolicy) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/pages.h:195 (dart+0x000000877158)
    #2 dart::Heap::AllocateOld(long, dart::HeapPage::PageType) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/heap.cc:82 (dart+0x000000876eec)
    #3 dart::Heap::Allocate(long, dart::Heap::Space) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/heap.h:67 (dart+0x00000092ab33)
    #4 dart::Object::Allocate(long, long, dart::Heap::Space) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/object.cc:1866 (dart+0x00000092dd92)
    #5 dart::StackMap::New(long, dart::BitmapBuilder*, long) /usr/local/google/home/asiva/workspace/dart-ws3/sdk/out/DebugX64/../../runtime/vm/object.cc:12164 (dart+0x00000096796a)

R=vegorov@google.com

Review-Url: https://codereview.chromium.org/2609643002 .
2017-01-05 11:27:10 -08:00
Zachary Anderson a1bcf051d8 clang-format runtime/vm
R=johnmccutchan@google.com

Review URL: https://codereview.chromium.org/2481873005 .
2016-11-08 13:54:47 -08:00
Ryan Macnak bb85b32d51 Fix --verify-on-transition for OSR and concurrent sweep.
Wait for concurrent sweep tasks before verifying points, as building the allocation set expects unmarked objects.

Make assertion okay with a missing stack map at entry, which transiently exists for OSR, as the frame looks the same as unoptimized code here.

Fixes #13608
Fixes #23683
Reproduces issue #26927

R=fschneider@google.com

Review URL: https://codereview.chromium.org/2411453003 .
2016-10-11 15:03:09 -07:00
John McCutchan 48c8ffa7f3 Initial isolate reload support
This is a cut of the work that Todd and I collaborated on in the reload branch.

In this CL, we've dropped the loader port hacks, in other words, on stack reloading in the standalone embedder does not work yet.

- [x] Support for hot reloading of isolate source code
- [x] Unit test harness and many tests
- [x] Service protocol and Observatory support
- [x] Product build does not include support for hot reloading.

R=rmacnak@google.com

Review URL: https://codereview.chromium.org/1965823002 .
2016-05-17 12:19:06 -07:00
Ivan Posva 5be5d54529 - Refactor Symbol allocation to expect a thread parameter.
- Preallocate all tokens as symbols to avoid repeated lookups.
- Pass thread/zone where useful while doing this change.
- Avoid allocating symbols for error messages.

BUG=
R=fschneider@google.com

Review URL: https://codereview.chromium.org/1870343002 .
2016-04-11 16:28:29 -07:00
John McCutchan d77d376124 Replace intptr_t with TokenDescriptor
- Use TokenDescriptor instead of intptr_t for all token positions.
- Use TokenDescriptor in raw_object instead of int32_t.
- TokenDescriptor is a POD with an int32_t (this shrinks the size of AST and IR nodes by 32-bits on 64-bit architectures).

There are some cleanups I plan on doing as a follow up CL:

- Replace TokenDescriptor::value() with TokenDescriptor::TokenPos()

R=iposva@google.com, rmacnak@google.com

Review URL: https://codereview.chromium.org/1644793002 .
2016-02-02 10:15:44 -08:00
John McCutchan 77101d63e3 Source positions for constructors and lots of async machinery
- Rework token position address space.
- Use ClassifyingTokenPositions::kMethodExtractor for the token position of a method extractor.
- Plumb token positions through all of Ast Transformer.
- Plumb token positions for temporary expressions, etc in Flow Graph Builder.
- Add token positions for parts of the await machinery.
- Move ClassifyingTokenPositions into token.h.
- Remove default token position of Scanner::kNoSourcePos for many IR instructions.
- A couple of unit tests.
- Use synthetic token positions for synthetic AstNodes.
- Fix SLEB128 encoding / decoding + test
- s/Scanner::kNoSourcePos/Token::kNoSourcePos.
- Remove >= 0 and < 0 checks against token positions and use helpers instead.

R=rmacnak@google.com

Review URL: https://codereview.chromium.org/1589643002 .
2016-01-19 15:01:08 -08:00
Ryan Macnak 9d8dcd1288 Load runtime entries from the Thread instead of the ObjectPool.
Removes the need to relocate their ObjectPool entries when loading a precompiled snapshot.

Saves about ~2kB of ObjectPool in hello_world at the cost of ~400B/Thread (64-bit).

R=fschneider@google.com

Review URL: https://codereview.chromium.org//1315893004 .
2015-09-02 14:58:26 -07:00