ff433dd9c0
Patch series "gcov: add Clang support", v4. This patch (of 3): base.c contains a few callbacks specific to GCC's gcov implementation. Move these into their own module in preparation for Clang support. Link: http://lkml.kernel.org/r/20190318025411.98014-2-trong@android.com Signed-off-by: Greg Hackmann <ghackmann@android.com> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Tri Vo <trong@android.com> Tested-by: Trilok Soni <tsoni@quicinc.com> Tested-by: Prasad Sodagudi <psodagud@quicinc.com> Tested-by: Tri Vo <trong@android.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Cc: Daniel Mentz <danielmentz@google.com> Cc: Petri Gynther <pgynther@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> (cherry picked from commit 826eba0d77bc74c4d1c611374b76abfe251e8538) Bug: 132997968 Test: defconfig + CONFIG_GCOV_KERNEL records coverage Change-Id: Ice0533106d634b22aeee49b6f542917f45c681f0
86 lines
1.8 KiB
C
86 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/export.h>
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#include <linux/kernel.h>
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#include <linux/mutex.h>
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#include "gcov.h"
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/*
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* __gcov_init is called by gcc-generated constructor code for each object
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* file compiled with -fprofile-arcs.
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*/
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void __gcov_init(struct gcov_info *info)
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{
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static unsigned int gcov_version;
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mutex_lock(&gcov_lock);
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if (gcov_version == 0) {
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gcov_version = gcov_info_version(info);
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/*
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* Printing gcc's version magic may prove useful for debugging
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* incompatibility reports.
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*/
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pr_info("version magic: 0x%x\n", gcov_version);
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}
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/*
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* Add new profiling data structure to list and inform event
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* listener.
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*/
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gcov_info_link(info);
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if (gcov_events_enabled)
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gcov_event(GCOV_ADD, info);
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mutex_unlock(&gcov_lock);
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}
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EXPORT_SYMBOL(__gcov_init);
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/*
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* These functions may be referenced by gcc-generated profiling code but serve
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* no function for kernel profiling.
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*/
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void __gcov_flush(void)
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{
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/* Unused. */
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}
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EXPORT_SYMBOL(__gcov_flush);
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void __gcov_merge_add(gcov_type *counters, unsigned int n_counters)
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{
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/* Unused. */
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}
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EXPORT_SYMBOL(__gcov_merge_add);
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void __gcov_merge_single(gcov_type *counters, unsigned int n_counters)
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{
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/* Unused. */
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}
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EXPORT_SYMBOL(__gcov_merge_single);
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void __gcov_merge_delta(gcov_type *counters, unsigned int n_counters)
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{
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/* Unused. */
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}
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EXPORT_SYMBOL(__gcov_merge_delta);
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void __gcov_merge_ior(gcov_type *counters, unsigned int n_counters)
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{
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/* Unused. */
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}
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EXPORT_SYMBOL(__gcov_merge_ior);
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void __gcov_merge_time_profile(gcov_type *counters, unsigned int n_counters)
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{
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/* Unused. */
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}
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EXPORT_SYMBOL(__gcov_merge_time_profile);
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void __gcov_merge_icall_topn(gcov_type *counters, unsigned int n_counters)
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{
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/* Unused. */
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}
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EXPORT_SYMBOL(__gcov_merge_icall_topn);
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void __gcov_exit(void)
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{
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/* Unused. */
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}
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EXPORT_SYMBOL(__gcov_exit);
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