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Disable enforcing alignas() for structs that are used as thread_local
data on NetBSD. The NetBSD ld.so implementation is buggy and does
not enforce correct alignment; however, clang seems to take it for
granted and generates instructions that segv on wrongly aligned objects.
Therefore, disable those alignas() statements on NetBSD until we can
establish a better fix.
Apparently, std::aligned_storage<> does not have any real effect
at the moment, so we can leave it as-is.
Differential Revision: https://reviews.llvm.org/D56000
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@350029 91177308-0d34-0410-b5e6-96231b3b80d8
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This extends XRay to support Fuchsia.
Differential Revision: https://reviews.llvm.org/D52162
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@347443 91177308-0d34-0410-b5e6-96231b3b80d8
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This avoids the build error in newer versions of GCC.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@344579 91177308-0d34-0410-b5e6-96231b3b80d8
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This abstracts away the file descriptor related logic which makes it
easier to port XRay to platform that don't use file descriptors or
file system for writing the log data, such as Fuchsia.
Differential Revision: https://reviews.llvm.org/D52161
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@344578 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
This is for coding standard conformance, and for fixing an ODR violation
issue: __xray::ThreadLocalData is defined twice and differently in
xray_fdr_logging.cc and xray_basic_logging.cc
Reviewers: dberris, mboerger, eizan
Reviewed By: dberris
Subscribers: delcypher, jfb, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D52639
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@343289 91177308-0d34-0410-b5e6-96231b3b80d8
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This API has been deprecated three months ago and shouldn't be used
anymore, all clients should migrate to the new string based API.
Differential Revision: https://reviews.llvm.org/D51606
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@342318 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@337176 91177308-0d34-0410-b5e6-96231b3b80d8
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record entry in FDR mode
Summary:
llvm-xray changes:
- account-mode - process-id {...} shows after thread-id
- convert-mode - process {...} shows after thread
- parses FDR and basic mode pid entries
- Checks version number for FDR log parsing.
Basic logging changes:
- Update header version from 2 -> 3
FDR logging changes:
- Update header version from 2 -> 3
- in writeBufferPreamble, there is an additional PID Metadata record (after thread id record and tsc record)
Test cases changes:
- fdr-mode.cc, fdr-single-thread.cc, fdr-thread-order.cc modified to catch process id output in the log.
Reviewers: dberris
Reviewed By: dberris
Subscribers: hiraditya, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D49153
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@336974 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary: XRayRecords now includes a PID field. Basic handlers fetch pid and tid each time they are called instead of caching the value. Added a testcase that calls fork and checks if the child TID is different from the parent TID to verify that the processes' TID are different in the trace.
Reviewers: dberris, Maknee
Reviewed By: dberris, Maknee
Subscribers: kpw, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D49025
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@336769 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
This fixes http://llvm.org/PR32274.
This change adds a test to ensure that we're able to link XRay modes and
the runtime to binaries that don't need to depend on the C++ standard
library or a C++ ABI library. In particular, we ensure that this will work
with C programs compiled+linked with XRay.
To make the test pass, we need to change a few things in the XRay
runtime implementations to remove the reliance on C++ ABI features. In
particular, we change the thread-safe function-local-static
initialisation to use pthread_* instead of the C++ features that ensure
non-trivial thread-local/function-local-static initialisation.
Depends on D47696.
Reviewers: dblaikie, jfb, kpw, eizan
Reviewed By: kpw
Subscribers: echristo, eizan, kpw, mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D46998
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@334262 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
This change extracts the recursion guard implementation from FDR Mode
and updates it to do the following:
- Do the atomic operation correctly to be signal-handler safe.
- Make it usable in both FDR and Basic Modes.
Before this change, the recursion guard relied on an unsynchronised read
and write on a volatile thread-local. A signal handler could then run in
between the read and the write, and then be able to run instrumented
code as part of the signal handling. Using an atomic exchange instead
fixes that by doing a proper mutual exclusion even in the presence of
signal handling.
Reviewers: kpw, eizan, jfb
Reviewed By: eizan
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D47696
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@334064 91177308-0d34-0410-b5e6-96231b3b80d8
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This is a cosmetic change to remove unnecessary full-qualifications of
types/functions that are already in the __xray:: namespace.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@334000 91177308-0d34-0410-b5e6-96231b3b80d8
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This is a non-functional change that removes the full qualification of
functions in __sanitizer:: being used in __xray.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@333983 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
This addresses http://llvm.org/PR36790.
This change allows the XRay Basic Mode implementation to use the
string-based initialization routine provided through
`__xray_log_init_mode(...)`. In the process, we've also deprecated some
flags defined for the `XRAY_OPTIONS` environment variable.
We then introduce another environment variable that can control the XRay
Basic Mode implementation through `XRAY_BASIC_OPTIONS`.
We also rename files from `xray_inmemory_log` to `xray_basic_logging` to
be more in line with the mode implementation.
Depends on D46174.
Reviewers: echristo, kpw, pelikan, eizan
Reviewed By: kpw
Subscribers: mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D46246
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@331507 91177308-0d34-0410-b5e6-96231b3b80d8
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