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6 Commits

Author SHA1 Message Date
Ian Levesque 4b9bef7e6c [xray] Preserve x8 in trampoline on AArch64 
Summary: Fixes an ABI violation in the trampoline code for AArch64 that causes the indirect result register to get overwritten if the XRay handler function is complex enough to use it.

Reviewers: MaskRay, dberris, johnislarry

Subscribers: kristof.beyls, danielkiss, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D78596
 2020-04-27 14:57:26 -04:00
Ian Levesque 5081468a66 [xray] Avoid text relocations in trampolines for ARM/AArch64 
Summary: Switch to pc-relative lookup of the xray handler function to avoid text relocations.

Reviewers: MaskRay, dberris, johnislarry

Subscribers: kristof.beyls, danielkiss, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D78595
 2020-04-21 23:21:02 -04:00
Ian Levesque eeaabe64e3 [xray] Use hidden symbol visibility for xray trampolines 
Summary: We load multiple copies of the trampolines into memory when instrumenting DSOs.  Hidden visibility prevents conflicts in this scenario.

Reviewers: MaskRay, dberris, johnislarry

Subscribers: #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D78593
 2020-04-21 23:19:52 -04:00
Dean Michael Berris 5d892ab02e Add NO_EXEC_STACK_DIRECTIVE to xray assembly files. 
Summary: Add NO_EXEC_STACK_DIRECTIVE to xray assembly files

Reviewers: dberris, javed.absar

Reviewed By: dberris

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D30953

llvm-svn: 297894
 2017-03-15 21:18:47 +00:00
Serge Rogatch fa846a116e [XRay][AArch64] More staging for tail call support in XRay AArch64 - in compiler-rt 
Summary:
This patch provides a trampoline for function tail exit tracing. Still, it's staging because code `1` is passed to the handler function (indicating a normal exit) instead of `2`, which would indicate tail exit. This is so until the logging part of XRay supports tail exits too.
Related: https://reviews.llvm.org/D28947 (LLVM)

Reviewers: dberris, rengolin

Reviewed By: rengolin

Subscribers: aemerson, llvm-commits, iid_iunknown

Differential Revision: https://reviews.llvm.org/D28948

llvm-svn: 293082
 2017-01-25 20:27:19 +00:00
Dean Michael Berris bad8f0feb4 [XRay] Support AArch64 in compiler-rt 
This patch adds XRay support in compiler-rt for AArch64 targets.
This patch is one of a series:

LLVM: https://reviews.llvm.org/D26412
Clang: https://reviews.llvm.org/D26415

Author: rSerge

Reviewers: rengolin, dberris

Subscribers: aemerson, mgorny, llvm-commits, iid_iunknown

Differential Revision: https://reviews.llvm.org/D26413

llvm-svn: 287517
 2016-11-21 03:20:43 +00:00