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We experience CLR crash on some architectures (at least on x86) in case
of unhandled managed exception. libunwind steps to the very end of a
stack, and if .eh_frame info is correct, it returns with retcode 0 and
ip=0 from unw_step, then PAL calls unw_is_signal_frame with
c->validate==0 which in turn dereferences zeroed ip in access_mem.
libunwind spec says that retcode 0 from unw_step means very end of a
stack, so PAL should not expect any frames, signal or not. It should
convert cursor back to SEH representation and return with TRUE.
corresponding PR to dotnet/runtime on upstream:
https://github.com/dotnet/runtime/pull/42620
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This reverts commit c4a72f57bee753daf09ffbc2a2dfe65ed1582919.
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Change-Id: I663d0fcdcd6fd8fb4c521d9bdbb4d234c96022ae
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Simple HelloWorld app can run with NI of System.Private.CoreLib.dll, HelloWorld.dll and System.Console.dll
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* Fix TPA map hash calculation.
The point of issue is "the Turkish-I Problem". After locale changed, towupper() provide another result for "i" and different hash are calculated in case if file name have "i" letter.
* Regression test for #37910
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This patch enables more generic method inlining for methods which are not compiled by NI.
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* Implement instantiating and unboxing through portable stublinker code
- Handle only the cases with register to register moves
- Shares abi processing logic with delegate shuffle thunk creation
- Architecture specific logic is relatively simple
- Do not permit use of HELPERREG in computed instantiating stubs
- Fix GetArgLoc such that it works on all architectures and OS combinations
Add a JIT stress test case for testing all of the various combinations
- Use the same calling convention test architecture that was used as part of tail call work
Rename secure delegates to wrapper delegates
- Secure delegates are no longer a feature of the runtime
- But the wrapper delegate lives on as a workaround for a weird detail of the ARM32 abi
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* Fix GenerateShuffleArray to support cyclic shuffles
The GenerateShuffleArray was not handling case when there was a cycle in
the register / stack slots shuffle and it resulted in an infinite loop
in this function. This issue is Unix Amd64 ABI specific.
To fix that, this change reworks the algorithm completely. Besides
fixing the issue, it has also better performance in some cases.
To fix the cyclic shuffling, I needed an extra helper register. However,
there was no available general purpose register available, so I had to
use xmm8 for this purpose.
* Remove special handling of the hang from ABI stress
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In case of evaluation with implicit function call aborted by ```ICorDebugEval::Abort()```, CoreCLR crash with SIGSEGV at line https://github.com/dotnet/runtime/blob/e25517ea27311297c1e3946acb3b4382d5fa7fef/src/coreclr/src/vm/jitinterface.cpp#L14293 since ```m_pJM``` is ```NULL```.
This happens because during ```EECodeInfo::Init()``` call, ```codeAddress``` parameter provide address inside native code region (this address belong to CallDescrWorkerInternal(), libcoreclr.so), but not address inside managed code, so, ```ExecutionManager::FindCodeRange()``` can't find appropriate ```RangeSection```.
During investigation I found, that at line https://github.com/dotnet/runtime/blob/e25517ea27311297c1e3946acb3b4382d5fa7fef/src/coreclr/src/vm/stackwalk.cpp#L2584 current context was not changed properly (we have wrong ```Eip``` register value).
I found, that ```FuncEvalFrame::UpdateRegDisplay()``` code
https://github.com/dotnet/runtime/blob/e25517ea27311297c1e3946acb3b4382d5fa7fef/src/coreclr/src/debug/ee/debugger.inl#L238-L247
don't have x86/Linux support implemented.
I propose changes, that were already made for other ```UpdateRegDisplay()``` implementations in order to provide proper context for x86/Linux.
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Turn on ASan inteceptors while marshaling managed buffers to native code.
We could not properly annotate already allocated on heap buffers, so
we have to disable pinning of such objects.
Current patch affects only pinning of native arrays.
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- Can remove a machine instruction which adds vtable offset
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* Fix PIE options
We were missing passing the -pie linker option. That means that while we
were compiling our code as position independent, the executables
(not shared libraries) were not marked as position independent and
ASLR was not applied to them. They were always loaded to fixed addresses.
This change adds the missing -pie option and also replaces all the individual
settings of -fPIE / -fPIC on the targets we build by a centralized setting
of CMAKE_POSITION_INDEPENDENT_CODE variable that causes cmake to add the
appropriate compiler options everywhere.
* Fix native parts of coreclr tests build
The native parts of the tests are not built using the root CMakeLists.txt
so I am moving enabling the position independent code to configurecompiler.cmake
Change-Id: Ieafff8984ec23e5fdb00fb0c2fb017e53afbce88
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Many diagnostic tools are unaware of 32-bit applications which have
large address spaces (> 2GB). Such tools include the TraceEvent library
(required by PerfView and dotnet-trace), and Visual Studio. They assume
the address range 0x80000000 through 0xFFFFFFFF as the system space and
thus often fail to read symbols from event traces generated by CoreCLR.
This workaround is to support such scenarios by simply discarding MSBs
of 32-bit instruction pointer values in the trace output. Only a minimal
set of values required for symbol resolution are affected by this
change. Beware that you will have to manually restore the original
values when you inspect them in lldb or etc.
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- Too many calls to arm_phdr_cb even though it get the same data.
- It caches an ARM_CB_DATA for libcoreclr.so, then reuse.
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Some commands of SOS validate a method table in DacValidateMethodTable.
In the function, it checks whether a method table is FreeObjectMethodTable or not with GetClass() value.
However, GetClass() should not be NULL. (There is an assert in GetClass())
In this patch, it compares pMT address with g_pFreeObjectMethodTable address only.
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glibc has deprecated sys/sysctl.h:
In file included from /coreclr/src/pal/src/misc/sysinfo.cpp:32:
/usr/include/sys/sysctl.h:21:2: error: "The <sys/sysctl.h> header is deprecated and will be removed." [-Werror,-W#warnings]
#warning "The <sys/sysctl.h> header is deprecated and will be removed."
^
1 error generated.
Fix that by preferring sysconf and only including sys/sysctl.h if
HAVE_SYSCONF is not true. This mirrors the order of the implementation
code in this file (sysinfo.cpp) which checks for HAVE_SYSCONF
before HAVE_SYSCTL.
Fixes #27008
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- Methods marked with AggressiveOptimization are not NGENed at all.
- The methods are compiled during the runtime with high JITC overhead.
- It makes launching time slower over 6% in our embedded systems.
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- After relocation, relocation section in zap image is not necessary.
- Mark the section as NotNeeded by giving advice(madvise with MADV_DONTNEED)
- It reduces 120~150KB PSS in tizen sample apps.
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Also ignore ptrace NT_FPREGSET failures for arm processes on aarch64
kernels. Fixes #25707.
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Change-Id: I48446ce7c8771a4c75149512bb7d8a8cb3fae8e5
Signed-off-by: Vyacheslav Cherkashin <v.cherkashin@samsung.com>
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This commit implements wrappers that allow interception transitions
from managed to external unmanaged code (CIL -> native) and back
(native -> CIL). This allows enable/disable ASan during transitions.
Due to this, we sanitize only external code, which allows us to
achieve acceptable performance.
Change-Id: I53ecdc14d28f7210cd9e7f5bd4db0c8ef5ed81fc
Signed-off-by: Vyacheslav Cherkashin <v.cherkashin@samsung.com>
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Parse ".dynamic" section (ELF dynamic array tags) of the module being
added, find ".rel(a).plt" section and search it for presence of
'__asan_init' symbol.
Change-Id: Ie7cc4c818b791b5f00713b42ba15131325b8152c
Signed-off-by: Andrey Drobyshev <a.drobyshev@samsung.com>
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Now we use corerun to run corefx tests instead of dotnet, because last
one isn't available for Tizen/armel. So we need to skip dotnet specific
arguments, we patch corerun for it because Microsoft.DotNet.RemoteExecutor
tries to execute binary that it gets from /proc/self/maps, so we need a
binary that will behave like dotnet.
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This fix is to update usages of SetupGcCoverage() under
FEATURE_PREJIT aligned to the signature change in #25261.
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pCurrentContextPointers in REGDISPLAY can contain NULLs so we need to use
ebp value from pCurrentContext. This patch contains following changes:
- GetRegdisplayFP returns ebp from pCurrentContext
- GetRegdisplayFP is used instead of *GetEbpLocation()
- Set##reg##Location also updates register value in pCurrentContext
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Check for `lvLRACandidate` instead of `!lvDoNotEnregister` when checking whether `this` may be enregistered and has an Interval.
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NetcoreDBG depends from PAL functions.
Instead of SOS plugin, that use PAL static libs, debugger should be able
to operate with any runtime version and can't be statically linked to PAL.
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Fix patch fixes SIGBUG that occurs due to unaligned read/write
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* Fail to explicitly tail call on x86 unix.
* Correctly return 100
* Correct return value
* Add noway assert in morphTailCall to avoid morphing slow tail calls on unix.
* Address feedback
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- Profile information is collected by ibc logger.
Hower it is not used and saved into profile file.
- The patch disables IBC logger which is enabled by default.
- It disables IBC logger only with ibclogger.h file.
IBCLOGGER_ENABLED definition is only used in ibclogger files.
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- Even if DACCESS_COMPILE or CROSSGEN_COMPILE is defined,
coreclr can be built without IBCLOGGER_ENABLED definition.
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This is needed to save a minicoredump of .NET applications to allows
reconstruct managed stack by lldb and SOS plugin.
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There have been no -pie linker option.
This patch adds -pie linker option into crossgen(for tizen)
This originates from 0024-Add-pie-to-linker-option.patch
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- In many cases cooperative GC mode is entered after acquiring the slot backpatching lock and the thread may block for debugger suspension while holding the lock. A FuncEval may time out on entering the lock if for example it calls a virtual or interface method for the first time. Failing the FuncEval when the lock is held enables the debugger to fall back to other options for expression evaluation.
- Also added polls for debugger suspension before acquiring the slot backpatching lock on background threads that often operate in preemptive GC mode. A common case is when the debugger breaks while the tiering delay timer is active, the timer ticks shortly afterwards (after debugger suspension completes) and if a thread pool thread is already available, the background thread would block while holding the lock. The poll checks for debugger suspension and pulses the GC mode to block before acquiring the lock.
Risks:
- The fix is only a heuristic and lessens the problem when it is detected that the lock is held by some thread. Since the lock is acquired in preemptive GC mode, it is still possible that after the check at the start of a FuncEval, another thread acquires the lock and the FuncEval may time out. The polling makes it less likely for the lock to be taken by background tiering work, for example if a FuncEval starts while rejitting a method.
- The expression evaluation experience may be worse when it is detected that the lock is held, and may still happen from unfortunate timing
- Low risk for the change itself
Port of https://github.com/dotnet/runtime/pull/2380
Fix for https://github.com/dotnet/runtime/issues/1537
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When string.Replace is given a target string with zero collation weight, it would enter an infinite loop. It is now changed so that the call to Replace terminates when such a condition is encountered.
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