The profiler's signal handler clobbers errno, via its calls to sem_post,
or via other functions that it transitively calls. TSan complains about
this, as a sample arriving at the wrong time could make it look like a
function that failed actually succeeded, or vice versa. Ensure that the
signal handler preserves the state of the world by saving and restoring
errno around its operation.
operator< for EHTable compares the LHS start PC with the RHS *end* PC.
Because the ranges are non-overlapping, this works fine for two distinct
EHTables. However, the comparison doesn't work if LHS and RHS refer to
the same EHTable; in that case operator< returns true, even though it
should return false because the two operands are identical.
The operator is used to sort a std::vector using std::sort [1]. I think
the libc++ std::sort implementation has a quirk where, if the comparison
function has the above bug, sort will sometimes get confused, and start
sorting "values" outside of the memory range that it's given. This
results in memory corruption and subsequent unpredictable behavior.
The fix is simply to compare only the start PCs in EHTable, so that
std::sort can work on it correctly.
[1] http://mxr.mozilla.org/mozilla-central/source/tools/profiler/core/EHABIStackWalk.cpp?rev=86730d0a8209#485
This commit contains a few things:
* Update our copy of google-breakpad to upstream c53ed143108948eb7e2d7ee77dc8c0d92050ce7c
* Get rid of all but one local patch, fold a few related local patches into one
* Misc build fixup to sync with upstream--adding a few new moz.build files,
source files
* The final bits of unhooking Breakpad from the profiler:
** Revert to only building toolkit/crashreporter if MOZ_CRASHREPORTER.
** Stop building bits of Breakpad that we only needed for the profiler.
** Remove a few bits of profiler code that were used to interface with Breakpad.
** Remove toolkit/crashreporter/breakpad-logging, which was only used to
suppress Breakpad logging for the in-process stackwalker.
* Upstream removed their Android-compat sys/ucontext.h because the Android NDK
added it, but the bionic we're using for Gonk builds is too old, so add a
copy of the previous version of those files to
toolkit/crashreporter/gonk-include to keep Gonk building.
* Consolidate moz.build files under toolkit/crashreporter/google-breakpad/client/linux
--HG--
rename : toolkit/crashreporter/google-breakpad/src/common/pathname_stripper.h => toolkit/crashreporter/google-breakpad/src/processor/pathname_stripper.h
rename : toolkit/crashreporter/google-breakpad/src/common/pathname_stripper_unittest.cc => toolkit/crashreporter/google-breakpad/src/processor/pathname_stripper_unittest.cc
extra : histedit_source : 43e65f5432657f548cac5aa7936461e58454c3b6%2C7b56ccc79d9d58ebde0583d920f3593e25212621
extra : rebase_source : f6dbfb8fb2ba5b27e63b26d57c404962679c7a76
extra : commitid : DMQlXPms868
extra : source : 09fd4f3ab6e764016fe073efb226f03b5969af59
extra : intermediate-source : 16f9d3a6d2ef6a6efd088e3b8eff0a4723daef8f
We need to let ContentParent and PluginModuleParent get a reference to the ProfileGatherer
during the window of time that we're profiling so that if they start to die (the actor is
starting to go away), they have a gatherer they can send their last profile data to.
--HG--
extra : commitid : LkcpDsiXmp0
extra : rebase_source : d1c9e6e7640ff759cef25920e2bc17c0484544bd
The bulk of this commit was generated with a script, executed at the top
level of a typical source code checkout. The only non-machine-generated
part was modifying MFBT's moz.build to reflect the new naming.
CLOSED TREE makes big refactorings like this a piece of cake.
# The main substitution.
find . -name '*.cpp' -o -name '*.cc' -o -name '*.h' -o -name '*.mm' -o -name '*.idl'| \
xargs perl -p -i -e '
s/nsRefPtr\.h/RefPtr\.h/g; # handle includes
s/nsRefPtr ?</RefPtr</g; # handle declarations and variables
'
# Handle a special friend declaration in gfx/layers/AtomicRefCountedWithFinalize.h.
perl -p -i -e 's/::nsRefPtr;/::RefPtr;/' gfx/layers/AtomicRefCountedWithFinalize.h
# Handle nsRefPtr.h itself, a couple places that define constructors
# from nsRefPtr, and code generators specially. We do this here, rather
# than indiscriminantly s/nsRefPtr/RefPtr/, because that would rename
# things like nsRefPtrHashtable.
perl -p -i -e 's/nsRefPtr/RefPtr/g' \
mfbt/nsRefPtr.h \
xpcom/glue/nsCOMPtr.h \
xpcom/base/OwningNonNull.h \
ipc/ipdl/ipdl/lower.py \
ipc/ipdl/ipdl/builtin.py \
dom/bindings/Codegen.py \
python/lldbutils/lldbutils/utils.py
# In our indiscriminate substitution above, we renamed
# nsRefPtrGetterAddRefs, the class behind getter_AddRefs. Fix that up.
find . -name '*.cpp' -o -name '*.h' -o -name '*.idl' | \
xargs perl -p -i -e 's/nsRefPtrGetterAddRefs/RefPtrGetterAddRefs/g'
if [ -d .git ]; then
git mv mfbt/nsRefPtr.h mfbt/RefPtr.h
else
hg mv mfbt/nsRefPtr.h mfbt/RefPtr.h
fi
--HG--
rename : mfbt/nsRefPtr.h => mfbt/RefPtr.h
This commit was generated using the following script, executed at the
top level of a typical source code checkout.
# Don't modify select files in mfbt/ because it's not worth trying to
# tease out the dependencies currently.
#
# Don't modify anything in media/gmp-clearkey/0.1/ because those files
# use their own RefPtr, defined in their own RefCounted.h.
find . -name '*.cpp' -o -name '*.h' -o -name '*.mm' -o -name '*.idl'| \
grep -v 'mfbt/RefPtr.h' | \
grep -v 'mfbt/nsRefPtr.h' | \
grep -v 'mfbt/RefCounted.h' | \
grep -v 'media/gmp-clearkey/0.1/' | \
xargs perl -p -i -e '
s/mozilla::RefPtr/nsRefPtr/g; # handle declarations in headers
s/\bRefPtr</nsRefPtr</g; # handle local variables in functions
s#mozilla/RefPtr.h#mozilla/nsRefPtr.h#; # handle #includes
s#mfbt/RefPtr.h#mfbt/nsRefPtr.h#; # handle strange #includes
'
# |using mozilla::RefPtr;| is OK; |using nsRefPtr;| is invalid syntax.
find . -name '*.cpp' -o -name '*.mm' | xargs sed -i -e '/using nsRefPtr/d'
# RefPtr.h used |byRef| for dealing with COM-style outparams.
# nsRefPtr.h uses |getter_AddRefs|.
# Fixup that mismatch.
find . -name '*.cpp' -o -name '*.h'| \
xargs perl -p -i -e 's/byRef/getter_AddRefs/g'
Various bits depend on RefPtr.h to provide RefCounted<T> and RefPtr<T>.
It will be easier to manage an automatic conversion from RefPtr<T> to
nsRefPtr<T> if we split out the dependency on RefCounted<T> first.
When we pause the sampler in the parent, we should pause it in the child as well.
Similarly, when the parent resumes, the child should also resume.
--HG--
extra : commitid : CI7X3B04eB5
extra : rebase_source : 8fdaae4004015fa54747599cff54acd187683a71
extra : amend_source : d5960310c462c208485802d70b1535f09ceaeccf
The bulk of this commit was generated by running:
run-clang-tidy.py \
-checks='-*,llvm-namespace-comment' \
-header-filter=^/.../mozilla-central/.* \
-fix
Jim Chen
Carsten "Tomcat" Book
Chris Peterson
Nathan Froyd
Kyle Huey
Charles Collicutt
Ryan VanderMeulen
Ted Mielczarek
Tom Tromey
Benoit Girard
Jeff Muizelaar
Mike Conley
Nathan Froyd
Nick Fitzgerald
Dylan Roeh
James Willcox
Kan-Ru Chen
Birunthan Mohanathas