svn commit: r344487 - in head/sys: conf gnu/gcov
Matt Macy
mmacy at FreeBSD.org
Sat Feb 23 21:14:02 UTC 2019
Author: mmacy
Date: Sat Feb 23 21:14:00 2019
New Revision: 344487
URL: https://svnweb.freebsd.org/changeset/base/344487
Log:
gcov support
add gcov support and export results as files in debugfs
Reviewed by: hps@
MFC after: 1 week
Sponsored by: iX Systems
Differential Revision: https://reviews.freebsd.org/D19260
Added:
head/sys/gnu/gcov/
head/sys/gnu/gcov/gcc_4_7.c (contents, props changed)
head/sys/gnu/gcov/gcov.h (contents, props changed)
head/sys/gnu/gcov/gcov_fs.c (contents, props changed)
head/sys/gnu/gcov/gcov_subr.c (contents, props changed)
Modified:
head/sys/conf/files
head/sys/conf/kern.mk
head/sys/conf/kern.post.mk
head/sys/conf/kern.pre.mk
head/sys/conf/kmod.mk
head/sys/conf/options
Modified: head/sys/conf/files
==============================================================================
--- head/sys/conf/files Sat Feb 23 21:04:48 2019 (r344486)
+++ head/sys/conf/files Sat Feb 23 21:14:00 2019 (r344487)
@@ -3726,6 +3726,11 @@ fs/cd9660/cd9660_util.c optional cd9660
fs/cd9660/cd9660_vfsops.c optional cd9660
fs/cd9660/cd9660_vnops.c optional cd9660
fs/cd9660/cd9660_iconv.c optional cd9660_iconv
+gnu/gcov/gcc_4_7.c optional gcov
+gnu/gcov/gcov_fs.c optional gcov lindebugfs \
+ compile-with "${LINUXKPI_C}"
+gnu/gcov/gcov_subr.c optional gcov
+
kern/bus_if.m standard
kern/clock_if.m standard
kern/cpufreq_if.m standard
@@ -4473,6 +4478,12 @@ compat/linuxkpi/common/src/linux_slab.c optional comp
compat/linuxkpi/common/src/linux_usb.c optional compat_linuxkpi usb \
compile-with "${LINUXKPI_C}"
compat/linuxkpi/common/src/linux_work.c optional compat_linuxkpi \
+ compile-with "${LINUXKPI_C}"
+
+compat/linuxkpi/common/src/linux_seq_file.c optional compat_linuxkpi | lindebugfs \
+ compile-with "${LINUXKPI_C}"
+
+compat/lindebugfs/lindebugfs.c optional lindebugfs \
compile-with "${LINUXKPI_C}"
# OpenFabrics Enterprise Distribution (Infiniband)
Modified: head/sys/conf/kern.mk
==============================================================================
--- head/sys/conf/kern.mk Sat Feb 23 21:04:48 2019 (r344486)
+++ head/sys/conf/kern.mk Sat Feb 23 21:14:00 2019 (r344487)
@@ -56,7 +56,7 @@ CWARNEXTRA?= -Wno-error=address \
-Wno-error=maybe-uninitialized \
-Wno-error=overflow \
-Wno-error=sequence-point \
- -Wno-error=unused-but-set-variable
+ -Wno-unused-but-set-variable
.if ${COMPILER_VERSION} >= 60100
CWARNEXTRA+= -Wno-error=misleading-indentation \
-Wno-error=nonnull-compare \
Modified: head/sys/conf/kern.post.mk
==============================================================================
--- head/sys/conf/kern.post.mk Sat Feb 23 21:04:48 2019 (r344486)
+++ head/sys/conf/kern.post.mk Sat Feb 23 21:14:00 2019 (r344487)
@@ -32,6 +32,10 @@ MKMODULESENV+= WITH_EXTRA_TCP_STACKS="${WITH_EXTRA_TCP
MKMODULESENV+= SAN_CFLAGS="${SAN_CFLAGS}"
.endif
+.if defined(GCOV_CFLAGS)
+MKMODULESENV+= GCOV_CFLAGS="${GCOV_CFLAGS}"
+.endif
+
# Allow overriding the kernel debug directory, so kernel and user debug may be
# installed in different directories. Setting it to "" restores the historical
# behavior of installing debug files in the kernel directory.
Modified: head/sys/conf/kern.pre.mk
==============================================================================
--- head/sys/conf/kern.pre.mk Sat Feb 23 21:04:48 2019 (r344486)
+++ head/sys/conf/kern.pre.mk Sat Feb 23 21:14:00 2019 (r344487)
@@ -130,6 +130,15 @@ SAN_CFLAGS+= -fsanitize-coverage=trace-pc
CFLAGS+= ${SAN_CFLAGS}
+GCOV_ENABLED!= grep GCOV opt_global.h || true ; echo
+.if !empty(GCOV_ENABLED)
+.if ${COMPILER_TYPE} == "gcc"
+GCOV_CFLAGS+= -fprofile-arcs -ftest-coverage
+.endif
+.endif
+
+CFLAGS+= ${GCOV_CFLAGS}
+
# Put configuration-specific C flags last (except for ${PROF}) so that they
# can override the others.
CFLAGS+= ${CONF_CFLAGS}
Modified: head/sys/conf/kmod.mk
==============================================================================
--- head/sys/conf/kmod.mk Sat Feb 23 21:04:48 2019 (r344486)
+++ head/sys/conf/kmod.mk Sat Feb 23 21:14:00 2019 (r344487)
@@ -380,6 +380,9 @@ ${_src}:
# Add the sanitizer C flags
CFLAGS+= ${SAN_CFLAGS}
+# Add the gcov flags
+CFLAGS+= ${GCOV_CFLAGS}
+
# Respect configuration-specific C flags.
CFLAGS+= ${ARCH_FLAGS} ${CONF_CFLAGS}
Modified: head/sys/conf/options
==============================================================================
--- head/sys/conf/options Sat Feb 23 21:04:48 2019 (r344486)
+++ head/sys/conf/options Sat Feb 23 21:14:00 2019 (r344487)
@@ -1013,3 +1013,7 @@ NVME_USE_NVD opt_nvme.h
# amdsbwd options
AMDSBWD_DEBUG opt_amdsbwd.h
+
+# gcov support
+GCOV opt_global.h
+LINDEBUGFS
Added: head/sys/gnu/gcov/gcc_4_7.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/gnu/gcov/gcc_4_7.c Sat Feb 23 21:14:00 2019 (r344487)
@@ -0,0 +1,597 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * This code provides functions to handle gcc's profiling data format
+ * introduced with gcc 4.7.
+ *
+ * This file is based heavily on gcc_3_4.c file.
+ *
+ * For a better understanding, refer to gcc source:
+ * gcc/gcov-io.h
+ * libgcc/libgcov.c
+ *
+ * Uses gcc-internal data definitions.
+ */
+
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/types.h>
+#include <sys/systm.h>
+#include <sys/sbuf.h>
+#include <sys/malloc.h>
+#include <sys/module.h>
+#include <gnu/gcov/gcov.h>
+
+
+#if (__GNUC__ >= 7)
+#define GCOV_COUNTERS 9
+#elif (__GNUC__ > 5) || (__GNUC__ == 5 && __GNUC_MINOR__ >= 1)
+#define GCOV_COUNTERS 10
+#elif __GNUC__ == 4 && __GNUC_MINOR__ >= 9
+#define GCOV_COUNTERS 9
+#else
+#define GCOV_COUNTERS 8
+#endif
+
+#define GCOV_TAG_FUNCTION_LENGTH 3
+
+static struct gcov_info *gcov_info_head;
+
+/**
+ * struct gcov_ctr_info - information about counters for a single function
+ * @num: number of counter values for this type
+ * @values: array of counter values for this type
+ *
+ * This data is generated by gcc during compilation and doesn't change
+ * at run-time with the exception of the values array.
+ */
+struct gcov_ctr_info {
+ unsigned int num;
+ gcov_type *values;
+};
+
+/**
+ * struct gcov_fn_info - profiling meta data per function
+ * @key: comdat key
+ * @ident: unique ident of function
+ * @lineno_checksum: function lineo_checksum
+ * @cfg_checksum: function cfg checksum
+ * @ctrs: instrumented counters
+ *
+ * This data is generated by gcc during compilation and doesn't change
+ * at run-time.
+ *
+ * Information about a single function. This uses the trailing array
+ * idiom. The number of counters is determined from the merge pointer
+ * array in gcov_info. The key is used to detect which of a set of
+ * comdat functions was selected -- it points to the gcov_info object
+ * of the object file containing the selected comdat function.
+ */
+struct gcov_fn_info {
+ const struct gcov_info *key;
+ unsigned int ident;
+ unsigned int lineno_checksum;
+ unsigned int cfg_checksum;
+ struct gcov_ctr_info ctrs[0];
+};
+
+/**
+ * struct gcov_info - profiling data per object file
+ * @version: gcov version magic indicating the gcc version used for compilation
+ * @next: list head for a singly-linked list
+ * @stamp: uniquifying time stamp
+ * @filename: name of the associated gcov data file
+ * @merge: merge functions (null for unused counter type)
+ * @n_functions: number of instrumented functions
+ * @functions: pointer to pointers to function information
+ *
+ * This data is generated by gcc during compilation and doesn't change
+ * at run-time with the exception of the next pointer.
+ */
+struct gcov_info {
+ unsigned int version;
+ struct gcov_info *next;
+ unsigned int stamp;
+ const char *filename;
+ void (*merge[GCOV_COUNTERS])(gcov_type *, unsigned int);
+ unsigned int n_functions;
+ struct gcov_fn_info **functions;
+};
+
+/**
+ * gcov_info_filename - return info filename
+ * @info: profiling data set
+ */
+const char *
+gcov_info_filename(struct gcov_info *info)
+{
+ return (info->filename);
+}
+
+/**
+ * gcov_info_version - return info version
+ * @info: profiling data set
+ */
+unsigned int
+gcov_info_version(struct gcov_info *info)
+{
+ return (info->version);
+}
+
+/**
+ * gcov_info_next - return next profiling data set
+ * @info: profiling data set
+ *
+ * Returns next gcov_info following @info or first gcov_info in the chain if
+ * @info is %NULL.
+ */
+struct gcov_info *
+gcov_info_next(struct gcov_info *info)
+{
+ if (!info)
+ return gcov_info_head;
+
+ return (info->next);
+}
+
+/**
+ * gcov_info_link - link/add profiling data set to the list
+ * @info: profiling data set
+ */
+void
+gcov_info_link(struct gcov_info *info)
+{
+ info->next = gcov_info_head;
+ gcov_info_head = info;
+}
+
+/**
+ * gcov_info_unlink - unlink/remove profiling data set from the list
+ * @prev: previous profiling data set
+ * @info: profiling data set
+ */
+void
+gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info)
+{
+ if (prev)
+ prev->next = info->next;
+ else
+ gcov_info_head = info->next;
+}
+
+/* Symbolic links to be created for each profiling data file. */
+const struct gcov_link gcov_link[] = {
+ { OBJ_TREE, "gcno" }, /* Link to .gcno file in $(objtree). */
+ { 0, NULL},
+};
+
+/*
+ * Determine whether a counter is active. Doesn't change at run-time.
+ */
+static int
+counter_active(struct gcov_info *info, unsigned int type)
+{
+ return (info->merge[type] ? 1 : 0);
+}
+
+/* Determine number of active counters. Based on gcc magic. */
+static unsigned int
+num_counter_active(struct gcov_info *info)
+{
+ unsigned int i;
+ unsigned int result = 0;
+
+ for (i = 0; i < GCOV_COUNTERS; i++) {
+ if (counter_active(info, i))
+ result++;
+ }
+ return (result);
+}
+
+/**
+ * gcov_info_reset - reset profiling data to zero
+ * @info: profiling data set
+ */
+void
+gcov_info_reset(struct gcov_info *info)
+{
+ struct gcov_ctr_info *ci_ptr;
+ unsigned int fi_idx;
+ unsigned int ct_idx;
+
+ for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
+ ci_ptr = info->functions[fi_idx]->ctrs;
+
+ for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) {
+ if (!counter_active(info, ct_idx))
+ continue;
+
+ memset(ci_ptr->values, 0,
+ sizeof(gcov_type) * ci_ptr->num);
+ ci_ptr++;
+ }
+ }
+}
+
+/**
+ * gcov_info_is_compatible - check if profiling data can be added
+ * @info1: first profiling data set
+ * @info2: second profiling data set
+ *
+ * Returns non-zero if profiling data can be added, zero otherwise.
+ */
+int
+gcov_info_is_compatible(struct gcov_info *info1, struct gcov_info *info2)
+{
+ return (info1->stamp == info2->stamp);
+}
+
+/**
+ * gcov_info_add - add up profiling data
+ * @dest: profiling data set to which data is added
+ * @source: profiling data set which is added
+ *
+ * Adds profiling counts of @source to @dest.
+ */
+void
+gcov_info_add(struct gcov_info *dst, struct gcov_info *src)
+{
+ struct gcov_ctr_info *dci_ptr;
+ struct gcov_ctr_info *sci_ptr;
+ unsigned int fi_idx;
+ unsigned int ct_idx;
+ unsigned int val_idx;
+
+ for (fi_idx = 0; fi_idx < src->n_functions; fi_idx++) {
+ dci_ptr = dst->functions[fi_idx]->ctrs;
+ sci_ptr = src->functions[fi_idx]->ctrs;
+
+ for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) {
+ if (!counter_active(src, ct_idx))
+ continue;
+
+ for (val_idx = 0; val_idx < sci_ptr->num; val_idx++)
+ dci_ptr->values[val_idx] +=
+ sci_ptr->values[val_idx];
+
+ dci_ptr++;
+ sci_ptr++;
+ }
+ }
+}
+
+/**
+ * gcov_info_dup - duplicate profiling data set
+ * @info: profiling data set to duplicate
+ *
+ * Return newly allocated duplicate on success, %NULL on error.
+ */
+struct gcov_info *
+gcov_info_dup(struct gcov_info *info)
+{
+ struct gcov_info *dup;
+ struct gcov_ctr_info *dci_ptr; /* dst counter info */
+ struct gcov_ctr_info *sci_ptr; /* src counter info */
+ unsigned int active;
+ unsigned int fi_idx; /* function info idx */
+ unsigned int ct_idx; /* counter type idx */
+ size_t fi_size; /* function info size */
+ size_t cv_size; /* counter values size */
+
+ if ((dup = malloc(sizeof(*dup), M_GCOV, M_NOWAIT|M_ZERO)) == NULL)
+ return (NULL);
+ memcpy(dup, info, sizeof(*dup));
+
+ dup->next = NULL;
+ dup->filename = NULL;
+ dup->functions = NULL;
+
+ dup->filename = strdup_flags(info->filename, M_GCOV, M_NOWAIT);
+ if (dup->filename == NULL)
+ goto err_free;
+
+ dup->functions = malloc(info->n_functions * sizeof(struct gcov_fn_info *), M_GCOV, M_NOWAIT|M_ZERO);
+ if (dup->functions == NULL)
+ goto err_free;
+ active = num_counter_active(info);
+ fi_size = sizeof(struct gcov_fn_info);
+ fi_size += sizeof(struct gcov_ctr_info) * active;
+
+ for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
+ dup->functions[fi_idx] = malloc(fi_size, M_GCOV, M_NOWAIT|M_ZERO);
+ if (!dup->functions[fi_idx])
+ goto err_free;
+
+ *(dup->functions[fi_idx]) = *(info->functions[fi_idx]);
+
+ sci_ptr = info->functions[fi_idx]->ctrs;
+ dci_ptr = dup->functions[fi_idx]->ctrs;
+
+ for (ct_idx = 0; ct_idx < active; ct_idx++) {
+
+ cv_size = sizeof(gcov_type) * sci_ptr->num;
+
+ dci_ptr->values = malloc(cv_size, M_GCOV, M_NOWAIT);
+
+ if (!dci_ptr->values)
+ goto err_free;
+
+ dci_ptr->num = sci_ptr->num;
+ memcpy(dci_ptr->values, sci_ptr->values, cv_size);
+
+ sci_ptr++;
+ dci_ptr++;
+ }
+ }
+
+ return (dup);
+err_free:
+ gcov_info_free(dup);
+ return (NULL);
+}
+
+/**
+ * gcov_info_free - release memory for profiling data set duplicate
+ * @info: profiling data set duplicate to free
+ */
+void
+gcov_info_free(struct gcov_info *info)
+{
+ unsigned int active;
+ unsigned int fi_idx;
+ unsigned int ct_idx;
+ struct gcov_ctr_info *ci_ptr;
+
+ if (!info->functions)
+ goto free_info;
+
+ active = num_counter_active(info);
+
+ for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
+ if (!info->functions[fi_idx])
+ continue;
+
+ ci_ptr = info->functions[fi_idx]->ctrs;
+
+ for (ct_idx = 0; ct_idx < active; ct_idx++, ci_ptr++)
+ free(ci_ptr->values, M_GCOV);
+
+ free(info->functions[fi_idx], M_GCOV);
+ }
+
+free_info:
+ free(info->functions, M_GCOV);
+ free(__DECONST(char *, info->filename), M_GCOV);
+ free(info, M_GCOV);
+ }
+
+#define ITER_STRIDE PAGE_SIZE
+
+/**
+ * struct gcov_iterator - specifies current file position in logical records
+ * @info: associated profiling data
+ * @buffer: buffer containing file data
+ * @size: size of buffer
+ * @pos: current position in file
+ */
+struct gcov_iterator {
+ struct gcov_info *info;
+ caddr_t buffer;
+ size_t size;
+ off_t pos;
+};
+
+/**
+ * store_gcov_uint32 - store 32 bit number in gcov format to buffer
+ * @buffer: target buffer or NULL
+ * @off: offset into the buffer
+ * @v: value to be stored
+ *
+ * Number format defined by gcc: numbers are recorded in the 32 bit
+ * unsigned binary form of the endianness of the machine generating the
+ * file. Returns the number of bytes stored. If @buffer is %NULL, doesn't
+ * store anything.
+ */
+static size_t
+store_gcov_uint32(void *buffer, size_t off, uint32_t v)
+{
+ uint32_t *data;
+
+ if (buffer) {
+ data = (void*)((caddr_t)buffer + off);
+ *data = v;
+ }
+
+ return sizeof(*data);
+}
+
+/**
+ * store_gcov_uint64 - store 64 bit number in gcov format to buffer
+ * @buffer: target buffer or NULL
+ * @off: offset into the buffer
+ * @v: value to be stored
+ *
+ * Number format defined by gcc: numbers are recorded in the 32 bit
+ * unsigned binary form of the endianness of the machine generating the
+ * file. 64 bit numbers are stored as two 32 bit numbers, the low part
+ * first. Returns the number of bytes stored. If @buffer is %NULL, doesn't store
+ * anything.
+ */
+
+static size_t
+store_gcov_uint64(void *buffer, size_t off, uint64_t v)
+{
+ uint32_t *data;
+
+ if (buffer) {
+ data = (void*)((caddr_t)buffer + off);
+
+ data[0] = (v & 0xffffffffUL);
+ data[1] = (v >> 32);
+ }
+
+ return sizeof(*data) * 2;
+}
+
+/**
+ * convert_to_gcda - convert profiling data set to gcda file format
+ * @buffer: the buffer to store file data or %NULL if no data should be stored
+ * @info: profiling data set to be converted
+ *
+ * Returns the number of bytes that were/would have been stored into the buffer.
+ */
+static size_t
+convert_to_gcda(char *buffer, struct gcov_info *info)
+{
+ struct gcov_fn_info *fi_ptr;
+ struct gcov_ctr_info *ci_ptr;
+ unsigned int fi_idx;
+ unsigned int ct_idx;
+ unsigned int cv_idx;
+ size_t pos = 0;
+
+ /* File header. */
+ pos += store_gcov_uint32(buffer, pos, GCOV_DATA_MAGIC);
+ pos += store_gcov_uint32(buffer, pos, info->version);
+ pos += store_gcov_uint32(buffer, pos, info->stamp);
+
+ for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
+ fi_ptr = info->functions[fi_idx];
+
+ /* Function record. */
+ pos += store_gcov_uint32(buffer, pos, GCOV_TAG_FUNCTION);
+ pos += store_gcov_uint32(buffer, pos, GCOV_TAG_FUNCTION_LENGTH);
+ pos += store_gcov_uint32(buffer, pos, fi_ptr->ident);
+ pos += store_gcov_uint32(buffer, pos, fi_ptr->lineno_checksum);
+ pos += store_gcov_uint32(buffer, pos, fi_ptr->cfg_checksum);
+
+ ci_ptr = fi_ptr->ctrs;
+
+ for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) {
+ if (!counter_active(info, ct_idx))
+ continue;
+
+ /* Counter record. */
+ pos += store_gcov_uint32(buffer, pos,
+ GCOV_TAG_FOR_COUNTER(ct_idx));
+ pos += store_gcov_uint32(buffer, pos, ci_ptr->num * 2);
+
+ for (cv_idx = 0; cv_idx < ci_ptr->num; cv_idx++) {
+ pos += store_gcov_uint64(buffer, pos,
+ ci_ptr->values[cv_idx]);
+ }
+
+ ci_ptr++;
+ }
+ }
+
+ return (pos);
+}
+
+/**
+ * gcov_iter_new - allocate and initialize profiling data iterator
+ * @info: profiling data set to be iterated
+ *
+ * Return file iterator on success, %NULL otherwise.
+ */
+struct gcov_iterator *
+gcov_iter_new(struct gcov_info *info)
+{
+ struct gcov_iterator *iter;
+
+ iter = malloc(sizeof(struct gcov_iterator), M_GCOV, M_NOWAIT|M_ZERO);
+ if (iter == NULL)
+ goto err_free;
+
+ iter->info = info;
+ /* Dry-run to get the actual buffer size. */
+ iter->size = convert_to_gcda(NULL, info);
+ iter->buffer = malloc(iter->size, M_GCOV, M_NOWAIT);
+ if (!iter->buffer)
+ goto err_free;
+
+ convert_to_gcda(iter->buffer, info);
+
+ return iter;
+
+err_free:
+ free(iter, M_GCOV);
+ return (NULL);
+}
+
+
+/**
+ * gcov_iter_get_info - return profiling data set for given file iterator
+ * @iter: file iterator
+ */
+void
+gcov_iter_free(struct gcov_iterator *iter)
+{
+ free(iter->buffer, M_GCOV);
+ free(iter, M_GCOV);
+}
+
+/**
+ * gcov_iter_get_info - return profiling data set for given file iterator
+ * @iter: file iterator
+ */
+struct gcov_info *
+gcov_iter_get_info(struct gcov_iterator *iter)
+{
+ return (iter->info);
+}
+
+/**
+ * gcov_iter_start - reset file iterator to starting position
+ * @iter: file iterator
+ */
+void
+gcov_iter_start(struct gcov_iterator *iter)
+{
+ iter->pos = 0;
+}
+
+/**
+ * gcov_iter_next - advance file iterator to next logical record
+ * @iter: file iterator
+ *
+ * Return zero if new position is valid, non-zero if iterator has reached end.
+ */
+int
+gcov_iter_next(struct gcov_iterator *iter)
+{
+ if (iter->pos < iter->size)
+ iter->pos += ITER_STRIDE;
+
+ if (iter->pos >= iter->size)
+ return (EINVAL);
+
+ return 0;
+}
+
+/**
+ * gcov_iter_write - write data for current pos to seq_file
+ * @iter: file iterator
+ * @seq: seq_file handle
+ *
+ * Return zero on success, non-zero otherwise.
+ */
+int
+gcov_iter_write(struct gcov_iterator *iter, struct sbuf *sbuf)
+{
+ size_t len;
+
+ if (iter->pos >= iter->size)
+ return (EINVAL);
+
+ len = ITER_STRIDE;
+ if (iter->pos + len > iter->size)
+ len = iter->size - iter->pos;
+
+ sbuf_bcat(sbuf, iter->buffer + iter->pos, len);
+
+ return (0);
+}
Added: head/sys/gnu/gcov/gcov.h
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/gnu/gcov/gcov.h Sat Feb 23 21:14:00 2019 (r344487)
@@ -0,0 +1,99 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2019, Matthew Macy <mmacy at freebsd.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ *
+ */
+
+#ifndef _SYS_GCOV_H_
+#define _SYS_GCOV_H_
+
+MALLOC_DECLARE(M_GCOV);
+
+/*
+ * Profiling data types used for gcc 3.4 and above - these are defined by
+ * gcc and need to be kept as close to the original definition as possible to
+ * remain compatible.
+ */
+#define GCOV_DATA_MAGIC ((unsigned int) 0x67636461)
+#define GCOV_TAG_FUNCTION ((unsigned int) 0x01000000)
+#define GCOV_TAG_COUNTER_BASE ((unsigned int) 0x01a10000)
+#define GCOV_TAG_FOR_COUNTER(count) \
+ (GCOV_TAG_COUNTER_BASE + ((unsigned int) (count) << 17))
+
+typedef uint64_t gcov_type;
+
+/* Opaque gcov_info. The gcov structures can change as for example in gcc 4.7 so
+ * we cannot use full definition here and they need to be placed in gcc specific
+ * implementation of gcov. This also means no direct access to the members in
+ * generic code and usage of the interface below.*/
+struct gcov_info;
+
+/* Interface to access gcov_info data */
+const char *gcov_info_filename(struct gcov_info *info);
+unsigned int gcov_info_version(struct gcov_info *info);
+struct gcov_info *gcov_info_next(struct gcov_info *info);
+void gcov_info_link(struct gcov_info *info);
+void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info);
+
+/* Base interface. */
+enum gcov_action {
+ GCOV_ADD,
+ GCOV_REMOVE,
+};
+
+/* Iterator control. */
+struct gcov_iterator;
+
+struct gcov_iterator *gcov_iter_new(struct gcov_info *info);
+void gcov_iter_free(struct gcov_iterator *iter);
+void gcov_iter_start(struct gcov_iterator *iter);
+int gcov_iter_next(struct gcov_iterator *iter);
+int gcov_iter_write(struct gcov_iterator *iter, struct sbuf *sbuf);
+struct gcov_info *gcov_iter_get_info(struct gcov_iterator *iter);
+
+/* gcov_info control. */
+void gcov_info_reset(struct gcov_info *info);
+int gcov_info_is_compatible(struct gcov_info *info1, struct gcov_info *info2);
+void gcov_info_add(struct gcov_info *dest, struct gcov_info *source);
+struct gcov_info *gcov_info_dup(struct gcov_info *info);
+void gcov_info_free(struct gcov_info *info);
+void gcov_stats_reset(void);
+void gcov_enable_events(void);
+void gcov_module_unload(void *, module_t);
+void gcov_fs_init(void);
+
+int within_module(vm_offset_t addr, module_t mod);
+
+struct gcov_link {
+ enum {
+ OBJ_TREE,
+ SRC_TREE,
+ } dir;
+ const char *ext;
+};
+extern const struct gcov_link gcov_link[];
+#endif
Added: head/sys/gnu/gcov/gcov_fs.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/gnu/gcov/gcov_fs.c Sat Feb 23 21:14:00 2019 (r344487)
@@ -0,0 +1,945 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * This code exports profiling data as debugfs files to userspace.
+ *
+ * Copyright IBM Corp. 2009
+ * Author(s): Peter Oberparleiter <oberpar at linux.vnet.ibm.com>
+ *
+ * Uses gcc-internal data definitions.
+ * Based on the gcov-kernel patch by:
+ * Hubertus Franke <frankeh at us.ibm.com>
+ * Nigel Hinds <nhinds at us.ibm.com>
+ * Rajan Ravindran <rajancr at us.ibm.com>
+ * Peter Oberparleiter <oberpar at linux.vnet.ibm.com>
+ * Paul Larson
+ * Yi CDL Yang
+ */
+
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <sys/systm.h>
+#include <sys/param.h>
+#include <sys/sbuf.h>
+
+#include <sys/queue.h>
+#include <sys/linker.h>
+#include <sys/module.h>
+#include <sys/eventhandler.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/syslog.h>
+#include <sys/proc.h>
+#include <sys/sched.h>
+#include <sys/syslog.h>
+#include <sys/sysctl.h>
+#include <linux/debugfs.h>
+
+#include <gnu/gcov/gcov.h>
+#include <sys/queue.h>
+
+extern int gcov_events_enabled;
+static int gcov_persist;
+static struct mtx gcov_mtx;
+MTX_SYSINIT(gcov_init, &gcov_mtx, "gcov_mtx", MTX_DEF);
+MALLOC_DEFINE(M_GCOV, "gcov", "gcov");
+
+void __gcov_init(struct gcov_info *info);
+void __gcov_flush(void);
+void __gcov_merge_add(gcov_type *counters, unsigned int n_counters);
+void __gcov_merge_single(gcov_type *counters, unsigned int n_counters);
+void __gcov_merge_delta(gcov_type *counters, unsigned int n_counters);
+void __gcov_merge_ior(gcov_type *counters, unsigned int n_counters);
+void __gcov_merge_time_profile(gcov_type *counters, unsigned int n_counters);
+void __gcov_merge_icall_topn(gcov_type *counters, unsigned int n_counters);
+void __gcov_exit(void);
+
+static void gcov_event(enum gcov_action action, struct gcov_info *info);
+
+
+/*
+ * Private copy taken from libc
+ */
+static char *
+(basename)(char *path)
+{
+ char *ptr;
+
+ /*
+ * If path is a null pointer or points to an empty string,
+ * basename() shall return a pointer to the string ".".
+ */
+ if (path == NULL || *path == '\0')
+ return (__DECONST(char *, "."));
+
+ /* Find end of last pathname component and null terminate it. */
+ ptr = path + strlen(path);
+ while (ptr > path + 1 && *(ptr - 1) == '/')
+ --ptr;
+ *ptr-- = '\0';
+
+ /* Find beginning of last pathname component. */
+ while (ptr > path && *(ptr - 1) != '/')
+ --ptr;
+ return (ptr);
+}
+
+/*
+ * __gcov_init is called by gcc-generated constructor code for each object
+ * file compiled with -fprofile-arcs.
+ */
+void
+__gcov_init(struct gcov_info *info)
+{
+ static unsigned int gcov_version;
+
+ mtx_lock(&gcov_mtx);
+ if (gcov_version == 0) {
+ gcov_version = gcov_info_version(info);
+ /*
+ * Printing gcc's version magic may prove useful for debugging
+ * incompatibility reports.
+ */
+ log(LOG_INFO, "version magic: 0x%x\n", gcov_version);
+ }
+ /*
+ * Add new profiling data structure to list and inform event
+ * listener.
+ */
+ gcov_info_link(info);
+ if (gcov_events_enabled)
+ gcov_event(GCOV_ADD, info);
+ mtx_unlock(&gcov_mtx);
+}
+
+/*
+ * These functions may be referenced by gcc-generated profiling code but serve
+ * no function for kernel profiling.
+ */
+void
+__gcov_flush(void)
+{
+ /* Unused. */
+}
+
+void
+__gcov_merge_add(gcov_type *counters, unsigned int n_counters)
+{
+ /* Unused. */
+}
+
+void
+__gcov_merge_single(gcov_type *counters, unsigned int n_counters)
+{
+ /* Unused. */
+}
+
+void
+__gcov_merge_delta(gcov_type *counters, unsigned int n_counters)
+{
+ /* Unused. */
+}
+
+void
+__gcov_merge_ior(gcov_type *counters, unsigned int n_counters)
+{
+ /* Unused. */
+}
+
+void
+__gcov_merge_time_profile(gcov_type *counters, unsigned int n_counters)
+{
+ /* Unused. */
+}
+
+void
+__gcov_merge_icall_topn(gcov_type *counters, unsigned int n_counters)
+{
+ /* Unused. */
+}
+
+void
+__gcov_exit(void)
+{
+ /* Unused. */
+}
+
+
+/**
+ * struct gcov_node - represents a debugfs entry
+ * @entry: list entry for parent's child node list
+ * @children: child nodes
+ * @all_entry: list entry for list of all nodes
+ * @parent: parent node
+ * @loaded_info: array of pointers to profiling data sets for loaded object
+ * files.
+ * @num_loaded: number of profiling data sets for loaded object files.
+ * @unloaded_info: accumulated copy of profiling data sets for unloaded
+ * object files. Used only when gcov_persist=1.
+ * @dentry: main debugfs entry, either a directory or data file
+ * @links: associated symbolic links
+ * @name: data file basename
+ *
+ * struct gcov_node represents an entity within the gcov/ subdirectory
+ * of debugfs. There are directory and data file nodes. The latter represent
+ * the actual synthesized data file plus any associated symbolic links which
+ * are needed by the gcov tool to work correctly.
+ */
+struct gcov_node {
+ LIST_ENTRY(gcov_node) children_entry;
+ LIST_ENTRY(gcov_node) all_entry;
+ struct {
+ struct gcov_node *lh_first;
+ } children;
+ struct gcov_node *parent;
+ struct gcov_info **loaded_info;
+ struct gcov_info *unloaded_info;
+ struct dentry *dentry;
+ struct dentry **links;
+ int num_loaded;
+ char name[0];
+};
+
*** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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