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Add support for a special managed handler in sigchainlib that
will be called as the first user handler.
Use this support for native bridge v2. Extend test 115-native-bridge
to test the functionality.
Bug: 20217701
(cherry picked from commit 03c2cc89428914adf52229d6a3867eef6127911a)
Change-Id: I78cc01fbdabe169154ff6b94c9f3ddb95b5c7448
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Calling this after jni_on_load fixes the unity apps. This is
not exactly correct since we may already have the following chain.
Start up:
Us -> debuggerd
After app goes in front:
App -> us -> debuggerd
After we put ourself back at the front:
Us -> app -> us -> app -> .... stack overflow.
Bug: 17620677
Change-Id: I9183997e3d5ebd51c320b5d51425be5142e938f3
(cherry picked from commit 1f24296c7c8a6501ee2388c0d20b48f471b48660)
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Link sigchain.cc statically with dalvikvm, app_process,
surfaceflinger, dex2oat, patchoat and objdump.
Replace libsigchain.so with dummy implementaions to avoid
situations when it is used incorrectly.
Bug: 15345057
Bug: 15426766
Change-Id: If0b7f59a59824e30aa0c33dad76c7a44932180de
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It is dangerous to call dlsym from within a signal context
since it takes a lock and can lead to a mutex reentry attempt if
timing is bad.
This change adds an initialization function to the signal chain
that calls dlsym for sigaction and sigprocmask from outside the
signal context (from Runtime::Init()). The results are cached
in a static variable and used from within the signal context if
necessary.
However, tests don't necessarily call Runtime::Init() so we also
need to deal with the case where the signal chain is not initialized
and perform a lazy initialization from inside sigaction or sigprocmask.
This is always outside a signal context since we have not initialized
the runtime.
Bug: 17498571
Change-Id: I59eebfc67cc91c6f1d781a73e5d432ca5269ee48
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Break into object_lock, field_helper and method_helper.
Clean up header files following this.
Also tidy some of the Handle code in response to compiler errors when resolving
the changes in this CL.
Change-Id: I73e63015a0f02a754d0866bfaf58208aebcaa295
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This adds a preload library that overrides sigaction and sigprocmask
to implement signal chaining. Signal chaining allows us to chain
any signal so that the ART runtime receives it before any signal
handler registered in native code by an application. If the
ART signal handler doesn't want it, it will pass it on to the
user's handler.
ART uses signals for null pointer checks, stack overflow checks and
suspend points.
Also adds an OAT test to test this in isolation.
Change-Id: I9545f9f7343774c091410eb810504d9855fd399f
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