This patch introduces a new DLL blocklist type `RedirectToNoOpEntryPoint`
which hooks a DLL's entrypoint into a no-op function. With this technique,
we give the injected DLL no chance to run its code though we allow it to be
loaded into the process.
This new blocklist type is intended to block a DLL which is injected by IAT
patching which was planted by a kernel callback routine for LoadImage. It's
because blocking such a DLL makes a new process fail to launch.
Differential Revision: https://phabricator.services.mozilla.com/D68348
--HG--
extra : moz-landing-system : lando
This patch introduces `Kernel32ExportsSolver` which calculates RVAs of
kernel32's functions and transfers them to a target process, where the
transferred RVAs are resolved into function addresses.
Depends on D68346
Differential Revision: https://phabricator.services.mozilla.com/D68347
--HG--
extra : moz-landing-system : lando
This patch introduces a new DLL interceptor `WindowsDllEntryPointInterceptor`
which applies a hook to a target function without backing up the original
function code.
Depends on D68345
Differential Revision: https://phabricator.services.mozilla.com/D68346
--HG--
extra : moz-landing-system : lando
This patch introduces a new policy `MMPolicyInProcessEarlyStage` which does
not consume any functions imported from kernel32.dll so that we can use it
in a process's early stage i.e. before IAT is resolved.
Depends on D68344
Differential Revision: https://phabricator.services.mozilla.com/D68345
--HG--
extra : moz-landing-system : lando
`WindowsDllDetourPatcher::CreateTrampoline` does not only create a trampoline
region but also applies a patch on an original function. This patch extracts
the patching part as separate functions.
Differential Revision: https://phabricator.services.mozilla.com/D68344
--HG--
extra : moz-landing-system : lando
This patch moves the instantiation of `PEHeaders` from `CheckBlockInfo` to
`IsDllAllowed` so that `IsDllAllowed` can use an instance of `PEHeaders`.
Depends on D68342
Differential Revision: https://phabricator.services.mozilla.com/D68343
--HG--
extra : moz-landing-system : lando
This patch introduces `nt::VirtualQuery` which consumes only ntdll's functions
to reduce dependency in `MMPolicy` on kernel32.dll. With this, `MMPolicy` still
depends on kernel32.dll, that will be solved by a coming patch.
Differential Revision: https://phabricator.services.mozilla.com/D68342
--HG--
extra : moz-landing-system : lando
This patch introduces a new DLL blocklist type `RedirectToNoOpEntryPoint`
which hooks a DLL's entrypoint into a no-op function. With this technique,
we give the injected DLL no chance to run its code though we allow it to be
loaded into the process.
This new blocklist type is intended to block a DLL which is injected by IAT
patching which was planted by a kernel callback routine for LoadImage. It's
because blocking such a DLL makes a new process fail to launch.
Differential Revision: https://phabricator.services.mozilla.com/D68348
--HG--
extra : moz-landing-system : lando
This patch introduces `Kernel32ExportsSolver` which calculates RVAs of
kernel32's functions and transfers them to a target process, where the
transferred RVAs are resolved into function addresses.
Depends on D68346
Differential Revision: https://phabricator.services.mozilla.com/D68347
--HG--
extra : moz-landing-system : lando
This patch introduces a new DLL interceptor `WindowsDllEntryPointInterceptor`
which applies a hook to a target function without backing up the original
function code.
Depends on D68345
Differential Revision: https://phabricator.services.mozilla.com/D68346
--HG--
extra : moz-landing-system : lando
This patch introduces a new policy `MMPolicyInProcessEarlyStage` which does
not consume any functions imported from kernel32.dll so that we can use it
in a process's early stage i.e. before IAT is resolved.
Depends on D68344
Differential Revision: https://phabricator.services.mozilla.com/D68345
--HG--
extra : moz-landing-system : lando
`WindowsDllDetourPatcher::CreateTrampoline` does not only create a trampoline
region but also applies a patch on an original function. This patch extracts
the patching part as separate functions.
Depends on D68343
Differential Revision: https://phabricator.services.mozilla.com/D68344
--HG--
extra : moz-landing-system : lando
This patch moves the instantiation of `PEHeaders` from `CheckBlockInfo` to
`IsDllAllowed` so that `IsDllAllowed` can use an instance of `PEHeaders`.
Depends on D68342
Differential Revision: https://phabricator.services.mozilla.com/D68343
--HG--
extra : moz-landing-system : lando
This patch introduces `nt::VirtualQuery` which consumes only ntdll's functions
to reduce dependency in `MMPolicy` on kernel32.dll. With this, `MMPolicy` still
depends on kernel32.dll, that will be solved by a coming patch.
Differential Revision: https://phabricator.services.mozilla.com/D68342
--HG--
extra : moz-landing-system : lando
Similarly to changeset cfa64a6b5a87, a scope's enclosing scope is no longer updated by MovingTracer::onScopeEdge following the changes in bug 1625212. Update the suppression list accordingly.
Differential Revision: https://phabricator.services.mozilla.com/D69986
--HG--
extra : moz-landing-system : lando
RC should be non-copyable. It already is non-copyable in the atomic variant,
but not in the non-atomic variant. This ensures that RefCounted is also
non-copyable, which prevents that classes deriving from RefCounted get
accidentally copied.
Also, RC's operator= should be defined only in debug builds. As already
described in a code comment, it's only used in debug builds (to assign the
dead value), and otherwise no modifications other than incrementing &
decrementing should be possible.
Differential Revision: https://phabricator.services.mozilla.com/D69332
--HG--
extra : moz-landing-system : lando
Also move MOZ_MUST_USE before function declarations' specifiers and return type. While clang and gcc's attribute((warn_unused_result)) can appear before, between, or after function specifiers and return types, the [[nodiscard]] attribute must precede the function specifiers.
And removed a few unneded `#include "mozilla/Attributes.h"`.
Differential Revision: https://phabricator.services.mozilla.com/D69755
--HG--
extra : moz-landing-system : lando
Previously this ended up with MovingTracer doing the update itself, but now the pointer is stored in a CellHeader it's done through an overload of TraceEdge.
The TSAN stack doesn't appear to have the class for the unsafeSetPtr method that actually does the update so rather than make this apply to all uses of this method I added a supression for the next function up in the stack.
Differential Revision: https://phabricator.services.mozilla.com/D69524
--HG--
extra : moz-landing-system : lando
When our detour processes instructions, we pass `ReadOnlyTargetFunction` to
`CountPrefixBytes` to determine whether a lock prefix exists or not.
In that case, we don't need to pass both `ReadOnlyTargetFunction` and an offset
as a parameter because `ReadOnlyTargetFunction` has an offset as a member.
Differential Revision: https://phabricator.services.mozilla.com/D69360
--HG--
extra : moz-landing-system : lando
`ProfileBufferChunkManagerWithLocalLimit` is a chunk manager that enforces a
memory limit in each process.
It is meant to mimic the main way `BlocksRingBuffer` works, so that we can more
easily switch to the new buffer storage without introducing the extra complexity
of inter-process memory coordination yet.
`ProfileBufferChunkManagerWithLocalLimit` will still offer a benefit over
`BlocksRingBuffer`, in that it won't allocate the maximum buffer size
immediately -- speeding the initialization, and hopefully even reducing the
total Firefox memory consumption in short-lived processes.
Differential Revision: https://phabricator.services.mozilla.com/D68770
--HG--
extra : moz-landing-system : lando
Please double check that I am using this correctly. I believe we are
seeing the crash in the linked bug because we are not handling hardware
faults when reading from the memory mapped file. This patch just wraps
all accesses in the MMAP_FAULT_HANDLER_ macros.
Depends on D53042
Differential Revision: https://phabricator.services.mozilla.com/D53043
--HG--
rename : modules/libjar/MmapFaultHandler.cpp => mozglue/misc/MmapFaultHandler.cpp
rename : modules/libjar/MmapFaultHandler.h => mozglue/misc/MmapFaultHandler.h
extra : moz-landing-system : lando
Also adds missing includes in some files, these were previously only transivitely
included through mozilla/TypeTraits.h.
Differential Revision: https://phabricator.services.mozilla.com/D68561
--HG--
extra : moz-landing-system : lando
We still need it for Android < 6.0 (API 23) because otherwise we don't
have a way to hook up mozalloc.
Differential Revision: https://phabricator.services.mozilla.com/D66993
--HG--
extra : moz-landing-system : lando
A `ProfileBufferChunk` represents a single chunk of memory, with an optional
link to the next chunk.
In the new Fission-compatible profiler storage, chunks will be allocated by a
chunk manager, filled with data by the profiler, and then released back to the
chunk manager.
The chunk manager may decide to destroy or recycle old chunks based on memory
limits (per process, or for the entire Firefox app).
Differential Revision: https://phabricator.services.mozilla.com/D67272
--HG--
extra : moz-landing-system : lando
A `ProfileBufferChunk` represents a single chunk of memory, with an optional
link to the next chunk.
In the new Fission-compatible profiler storage, chunks will be allocated by a
chunk manager, filled with data by the profiler, and then released back to the
chunk manager.
The chunk manager may decide to destroy or recycle old chunks based on memory
limits (per process, or for the entire Firefox app).
Differential Revision: https://phabricator.services.mozilla.com/D67272
--HG--
extra : moz-landing-system : lando
We still need it for Android < 6.0 (API 23) because otherwise we don't
have a way to hook up mozalloc.
Differential Revision: https://phabricator.services.mozilla.com/D66993
--HG--
extra : moz-landing-system : lando
The old code was using `std::index_sequence_for` to call templated functions for
*every* possible Variant alternative.
Instead, using `Variant::match()` with a generic lambda (that also takes the
current Variant index, thanks to bug 1621865) means we're only calling the
function corresponding to the current alternative.
Differential Revision: https://phabricator.services.mozilla.com/D67241
--HG--
extra : moz-landing-system : lando
