llvm-project.git/compiler-rt/lib/interception/tests/interception_linux_test.cpp, branch main Unnamed repository; edit this file 'description' to name the repository. [compiler-rt] Allow 3 simultaneous interceptors on Linux 2023-06-09T09:30:41+00:00 Marco Elver elver@google.com 2023-05-30T17:27:59+00:00 37445e96d867f4266993085e821fbd4c4d8fa401 Rework Linux (and *BSD) interceptors to allow for up to 3 (2 for *BSD) simultaneous interceptors. See code comments for details. The main motivation is to support new sampling sanitizers (in the spirit of GWP-ASan), that have to intercept few functions. Unfortunately, the reality is that there are user interceptors that exist in the wild. To support foreign user interceptors, foreign dynamic analysis interceptors, and compiler-rt interceptors all at the same time, including any combination of them, this change enables up to 3 interceptors on Linux (2 on *BSD). v2: * Revert to to the simpler "weak wrapper -(alias)-> __interceptor" scheme on architectures that cannot implement a trampoline efficiently due to complexities of resolving a preemptible symbol (PowerPC64 ELFv2 global entry, and i386 PIC). * Avoid duplicate intercepted functions in gen_dynamic_list.py, due to matching __interceptor_X and ___interceptor_X. * Fix s390 __tls_get_offset. Reviewed By: dvyukov, MaskRay, vitalybuka Differential Revision: https://reviews.llvm.org/D151085 
Rework Linux (and *BSD) interceptors to allow for up to 3 (2 for *BSD)
simultaneous interceptors. See code comments for details.

The main motivation is to support new sampling sanitizers (in the spirit
of GWP-ASan), that have to intercept few functions. Unfortunately, the
reality is that there are user interceptors that exist in the wild.

To support foreign user interceptors, foreign dynamic analysis
interceptors, and compiler-rt interceptors all at the same time,
including any combination of them, this change enables up to 3
interceptors on Linux (2 on *BSD).

v2:
* Revert to to the simpler "weak wrapper -(alias)-> __interceptor"
  scheme on architectures that cannot implement a trampoline efficiently
  due to complexities of resolving a preemptible symbol (PowerPC64
  ELFv2 global entry, and i386 PIC).
* Avoid duplicate intercepted functions in gen_dynamic_list.py, due to
  matching __interceptor_X and ___interceptor_X.
* Fix s390 __tls_get_offset.

Reviewed By: dvyukov, MaskRay, vitalybuka

Differential Revision: https://reviews.llvm.org/D151085
Revert "[compiler-rt] Allow 3 simultaneous interceptors on Linux" 2023-06-07T08:16:24+00:00 Marco Elver elver@google.com 2023-06-07T08:15:49+00:00 33388d8c0b676009bcb4802d5db82865157cb41e This reverts commit 57882fe76e1826593cd0e53f73484b184c5007c4. This reverts commit 74b0ac571b5facee3c8038d21ed71d7a29ee1098. Breaks various build bots. 
This reverts commit 57882fe76e1826593cd0e53f73484b184c5007c4.
This reverts commit 74b0ac571b5facee3c8038d21ed71d7a29ee1098.

Breaks various build bots.
[compiler-rt] Allow 3 simultaneous interceptors on Linux 2023-06-07T07:06:31+00:00 Marco Elver elver@google.com 2023-05-30T17:27:59+00:00 74b0ac571b5facee3c8038d21ed71d7a29ee1098 Rework Linux (and *BSD) interceptors to allow for up to 3 (2 for *BSD) simultaneous interceptors. See code comments for details. The main motivation is to support new sampling sanitizers (in the spirit of GWP-ASan), that have to intercept few functions. Unfortunately, the reality is that there are user interceptors that exist in the wild. To support foreign user interceptors, foreign dynamic analysis interceptors, and compiler-rt interceptors all at the same time, including any combination of them, this change enables up to 3 interceptors on Linux (2 on *BSD). Reviewed By: dvyukov, MaskRay, vitalybuka Differential Revision: https://reviews.llvm.org/D151085 
Rework Linux (and *BSD) interceptors to allow for up to 3 (2 for *BSD)
simultaneous interceptors. See code comments for details.

The main motivation is to support new sampling sanitizers (in the spirit
of GWP-ASan), that have to intercept few functions. Unfortunately, the
reality is that there are user interceptors that exist in the wild.

To support foreign user interceptors, foreign dynamic analysis
interceptors, and compiler-rt interceptors all at the same time,
including any combination of them, this change enables up to 3
interceptors on Linux (2 on *BSD).

Reviewed By: dvyukov, MaskRay, vitalybuka

Differential Revision: https://reviews.llvm.org/D151085
compiler-rt: Rename .cc file in lib/{interception/tests,safestack} to .cpp 2019-08-01T13:56:52+00:00 Nico Weber nicolasweber@gmx.de 2019-08-01T13:56:52+00:00 9642e337ebe672c3810c80cf9920f3678806ea20 Like r367463, but for interception/tests and safestack. llvm-svn: 367560 
Like r367463, but for interception/tests and safestack.

llvm-svn: 367560