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 <mm...@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 <ober...@linux.vnet.ibm.com> + * + * Uses gcc-internal data definitions. + * Based on the gcov-kernel patch by: + * Hubertus Franke <fran...@us.ibm.com> + * Nigel Hinds <nhi...@us.ibm.com> + * Rajan Ravindran <raja...@us.ibm.com> + * Peter Oberparleiter <ober...@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 *** _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
