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DTrace: remove sparc64 remnants in non-contrib code

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Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Ed Maste 2021-03-20 21:19:35 -04:00
parent 7f5693d053
commit 64a790d264
1 changed files with 0 additions and 17 deletions
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17
sys/cddl/dev/profile/profile.c
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@ -83,15 +83,6 @@
* appears as its own stack frame. All of this means that we need to add one
* frame for amd64, and then take one away for both amd64 and i386.
*
* On SPARC, the picture is further complicated because the compiler
* optimizes away tail-calls -- so the following frames are optimized away:
*
* profile_fire
* cyclic_expire
*
* This gives three frames. However, on DEBUG kernels, the cyclic_expire
* frame cannot be tail-call eliminated, yielding four frames in this case.
*
* All of the above constraints lead to the mess below. Yes, the profile
* provider should ideally figure this out on-the-fly by hiting one of its own
* probes and then walking its own stack trace. This is complicated, however,
@ -103,14 +94,6 @@
#else
#ifdef __i386
#define PROF_ARTIFICIAL_FRAMES 6
#else
#ifdef __sparc
#ifdef DEBUG
#define PROF_ARTIFICIAL_FRAMES 4
#else
#define PROF_ARTIFICIAL_FRAMES 3
#endif
#endif
#endif
#endif