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
This commit is contained in:
parent
ebe0b35a18
commit
5426539c71
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=344487
@ -3726,6 +3726,11 @@ fs/cd9660/cd9660_util.c optional cd9660
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fs/cd9660/cd9660_vfsops.c optional cd9660
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fs/cd9660/cd9660_vfsops.c optional cd9660
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fs/cd9660/cd9660_vnops.c optional cd9660
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fs/cd9660/cd9660_vnops.c optional cd9660
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fs/cd9660/cd9660_iconv.c optional cd9660_iconv
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fs/cd9660/cd9660_iconv.c optional cd9660_iconv
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gnu/gcov/gcc_4_7.c optional gcov
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gnu/gcov/gcov_fs.c optional gcov lindebugfs \
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compile-with "${LINUXKPI_C}"
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gnu/gcov/gcov_subr.c optional gcov
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kern/bus_if.m standard
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kern/bus_if.m standard
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kern/clock_if.m standard
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kern/clock_if.m standard
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kern/cpufreq_if.m standard
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kern/cpufreq_if.m standard
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@ -4475,6 +4480,12 @@ compat/linuxkpi/common/src/linux_usb.c optional compat_linuxkpi usb \
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compat/linuxkpi/common/src/linux_work.c optional compat_linuxkpi \
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compat/linuxkpi/common/src/linux_work.c optional compat_linuxkpi \
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compile-with "${LINUXKPI_C}"
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compile-with "${LINUXKPI_C}"
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compat/linuxkpi/common/src/linux_seq_file.c optional compat_linuxkpi | lindebugfs \
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compile-with "${LINUXKPI_C}"
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compat/lindebugfs/lindebugfs.c optional lindebugfs \
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compile-with "${LINUXKPI_C}"
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# OpenFabrics Enterprise Distribution (Infiniband)
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# OpenFabrics Enterprise Distribution (Infiniband)
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ofed/drivers/infiniband/core/ib_addr.c optional ofed \
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ofed/drivers/infiniband/core/ib_addr.c optional ofed \
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compile-with "${OFED_C}"
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compile-with "${OFED_C}"
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@ -56,7 +56,7 @@ CWARNEXTRA?= -Wno-error=address \
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-Wno-error=maybe-uninitialized \
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-Wno-error=maybe-uninitialized \
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-Wno-error=overflow \
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-Wno-error=overflow \
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-Wno-error=sequence-point \
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-Wno-error=sequence-point \
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-Wno-error=unused-but-set-variable
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-Wno-unused-but-set-variable
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.if ${COMPILER_VERSION} >= 60100
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.if ${COMPILER_VERSION} >= 60100
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CWARNEXTRA+= -Wno-error=misleading-indentation \
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CWARNEXTRA+= -Wno-error=misleading-indentation \
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-Wno-error=nonnull-compare \
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-Wno-error=nonnull-compare \
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@ -32,6 +32,10 @@ MKMODULESENV+= WITH_EXTRA_TCP_STACKS="${WITH_EXTRA_TCP_STACKS}"
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MKMODULESENV+= SAN_CFLAGS="${SAN_CFLAGS}"
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MKMODULESENV+= SAN_CFLAGS="${SAN_CFLAGS}"
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.endif
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.endif
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.if defined(GCOV_CFLAGS)
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MKMODULESENV+= GCOV_CFLAGS="${GCOV_CFLAGS}"
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.endif
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# Allow overriding the kernel debug directory, so kernel and user debug may be
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# Allow overriding the kernel debug directory, so kernel and user debug may be
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# installed in different directories. Setting it to "" restores the historical
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# installed in different directories. Setting it to "" restores the historical
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# behavior of installing debug files in the kernel directory.
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# behavior of installing debug files in the kernel directory.
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@ -130,6 +130,15 @@ SAN_CFLAGS+= -fsanitize-coverage=trace-pc
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CFLAGS+= ${SAN_CFLAGS}
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CFLAGS+= ${SAN_CFLAGS}
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GCOV_ENABLED!= grep GCOV opt_global.h || true ; echo
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.if !empty(GCOV_ENABLED)
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.if ${COMPILER_TYPE} == "gcc"
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GCOV_CFLAGS+= -fprofile-arcs -ftest-coverage
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.endif
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.endif
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CFLAGS+= ${GCOV_CFLAGS}
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# Put configuration-specific C flags last (except for ${PROF}) so that they
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# Put configuration-specific C flags last (except for ${PROF}) so that they
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# can override the others.
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# can override the others.
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CFLAGS+= ${CONF_CFLAGS}
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CFLAGS+= ${CONF_CFLAGS}
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@ -380,6 +380,9 @@ ${_src}:
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# Add the sanitizer C flags
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# Add the sanitizer C flags
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CFLAGS+= ${SAN_CFLAGS}
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CFLAGS+= ${SAN_CFLAGS}
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# Add the gcov flags
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CFLAGS+= ${GCOV_CFLAGS}
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# Respect configuration-specific C flags.
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# Respect configuration-specific C flags.
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CFLAGS+= ${ARCH_FLAGS} ${CONF_CFLAGS}
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CFLAGS+= ${ARCH_FLAGS} ${CONF_CFLAGS}
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@ -1013,3 +1013,7 @@ NVME_USE_NVD opt_nvme.h
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# amdsbwd options
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# amdsbwd options
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AMDSBWD_DEBUG opt_amdsbwd.h
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AMDSBWD_DEBUG opt_amdsbwd.h
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# gcov support
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GCOV opt_global.h
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LINDEBUGFS
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597
sys/gnu/gcov/gcc_4_7.c
Normal file
597
sys/gnu/gcov/gcc_4_7.c
Normal file
@ -0,0 +1,597 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* This code provides functions to handle gcc's profiling data format
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* introduced with gcc 4.7.
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*
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* This file is based heavily on gcc_3_4.c file.
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*
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* For a better understanding, refer to gcc source:
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* gcc/gcov-io.h
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* libgcc/libgcov.c
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*
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* Uses gcc-internal data definitions.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/types.h>
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#include <sys/systm.h>
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#include <sys/sbuf.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <gnu/gcov/gcov.h>
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#if (__GNUC__ >= 7)
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#define GCOV_COUNTERS 9
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#elif (__GNUC__ > 5) || (__GNUC__ == 5 && __GNUC_MINOR__ >= 1)
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#define GCOV_COUNTERS 10
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#elif __GNUC__ == 4 && __GNUC_MINOR__ >= 9
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#define GCOV_COUNTERS 9
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#else
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#define GCOV_COUNTERS 8
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#endif
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#define GCOV_TAG_FUNCTION_LENGTH 3
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static struct gcov_info *gcov_info_head;
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/**
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* struct gcov_ctr_info - information about counters for a single function
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* @num: number of counter values for this type
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* @values: array of counter values for this type
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*
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* This data is generated by gcc during compilation and doesn't change
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* at run-time with the exception of the values array.
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*/
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struct gcov_ctr_info {
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unsigned int num;
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gcov_type *values;
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};
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/**
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* struct gcov_fn_info - profiling meta data per function
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* @key: comdat key
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* @ident: unique ident of function
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* @lineno_checksum: function lineo_checksum
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* @cfg_checksum: function cfg checksum
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* @ctrs: instrumented counters
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*
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* This data is generated by gcc during compilation and doesn't change
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* at run-time.
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*
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* Information about a single function. This uses the trailing array
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* idiom. The number of counters is determined from the merge pointer
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* array in gcov_info. The key is used to detect which of a set of
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* comdat functions was selected -- it points to the gcov_info object
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* of the object file containing the selected comdat function.
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*/
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struct gcov_fn_info {
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const struct gcov_info *key;
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unsigned int ident;
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unsigned int lineno_checksum;
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unsigned int cfg_checksum;
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struct gcov_ctr_info ctrs[0];
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};
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/**
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* struct gcov_info - profiling data per object file
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* @version: gcov version magic indicating the gcc version used for compilation
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* @next: list head for a singly-linked list
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* @stamp: uniquifying time stamp
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* @filename: name of the associated gcov data file
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* @merge: merge functions (null for unused counter type)
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* @n_functions: number of instrumented functions
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* @functions: pointer to pointers to function information
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*
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* This data is generated by gcc during compilation and doesn't change
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* at run-time with the exception of the next pointer.
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*/
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struct gcov_info {
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unsigned int version;
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struct gcov_info *next;
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unsigned int stamp;
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const char *filename;
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void (*merge[GCOV_COUNTERS])(gcov_type *, unsigned int);
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unsigned int n_functions;
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struct gcov_fn_info **functions;
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};
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/**
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* gcov_info_filename - return info filename
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* @info: profiling data set
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*/
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const char *
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gcov_info_filename(struct gcov_info *info)
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{
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return (info->filename);
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}
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/**
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* gcov_info_version - return info version
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* @info: profiling data set
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*/
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unsigned int
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gcov_info_version(struct gcov_info *info)
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{
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return (info->version);
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}
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/**
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* gcov_info_next - return next profiling data set
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* @info: profiling data set
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*
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* Returns next gcov_info following @info or first gcov_info in the chain if
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* @info is %NULL.
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*/
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struct gcov_info *
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gcov_info_next(struct gcov_info *info)
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{
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if (!info)
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return gcov_info_head;
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return (info->next);
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}
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/**
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* gcov_info_link - link/add profiling data set to the list
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* @info: profiling data set
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*/
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void
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gcov_info_link(struct gcov_info *info)
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{
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info->next = gcov_info_head;
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gcov_info_head = info;
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}
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/**
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* gcov_info_unlink - unlink/remove profiling data set from the list
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* @prev: previous profiling data set
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* @info: profiling data set
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*/
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void
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gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info)
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{
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if (prev)
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prev->next = info->next;
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else
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gcov_info_head = info->next;
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}
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/* Symbolic links to be created for each profiling data file. */
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const struct gcov_link gcov_link[] = {
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{ OBJ_TREE, "gcno" }, /* Link to .gcno file in $(objtree). */
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{ 0, NULL},
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};
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/*
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* Determine whether a counter is active. Doesn't change at run-time.
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*/
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static int
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counter_active(struct gcov_info *info, unsigned int type)
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{
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return (info->merge[type] ? 1 : 0);
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}
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/* Determine number of active counters. Based on gcc magic. */
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static unsigned int
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num_counter_active(struct gcov_info *info)
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{
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unsigned int i;
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unsigned int result = 0;
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for (i = 0; i < GCOV_COUNTERS; i++) {
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if (counter_active(info, i))
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result++;
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}
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return (result);
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}
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/**
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* gcov_info_reset - reset profiling data to zero
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* @info: profiling data set
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*/
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void
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gcov_info_reset(struct gcov_info *info)
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{
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struct gcov_ctr_info *ci_ptr;
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unsigned int fi_idx;
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unsigned int ct_idx;
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for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
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ci_ptr = info->functions[fi_idx]->ctrs;
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for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) {
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if (!counter_active(info, ct_idx))
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continue;
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memset(ci_ptr->values, 0,
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sizeof(gcov_type) * ci_ptr->num);
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ci_ptr++;
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}
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}
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}
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/**
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* gcov_info_is_compatible - check if profiling data can be added
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* @info1: first profiling data set
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* @info2: second profiling data set
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*
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* Returns non-zero if profiling data can be added, zero otherwise.
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*/
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int
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gcov_info_is_compatible(struct gcov_info *info1, struct gcov_info *info2)
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{
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return (info1->stamp == info2->stamp);
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}
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/**
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* gcov_info_add - add up profiling data
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* @dest: profiling data set to which data is added
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* @source: profiling data set which is added
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*
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* Adds profiling counts of @source to @dest.
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*/
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void
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gcov_info_add(struct gcov_info *dst, struct gcov_info *src)
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{
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struct gcov_ctr_info *dci_ptr;
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struct gcov_ctr_info *sci_ptr;
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unsigned int fi_idx;
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unsigned int ct_idx;
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unsigned int val_idx;
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for (fi_idx = 0; fi_idx < src->n_functions; fi_idx++) {
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dci_ptr = dst->functions[fi_idx]->ctrs;
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sci_ptr = src->functions[fi_idx]->ctrs;
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for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) {
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if (!counter_active(src, ct_idx))
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continue;
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for (val_idx = 0; val_idx < sci_ptr->num; val_idx++)
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dci_ptr->values[val_idx] +=
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sci_ptr->values[val_idx];
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dci_ptr++;
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sci_ptr++;
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}
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}
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}
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/**
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* gcov_info_dup - duplicate profiling data set
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* @info: profiling data set to duplicate
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*
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* Return newly allocated duplicate on success, %NULL on error.
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*/
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struct gcov_info *
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gcov_info_dup(struct gcov_info *info)
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{
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struct gcov_info *dup;
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struct gcov_ctr_info *dci_ptr; /* dst counter info */
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struct gcov_ctr_info *sci_ptr; /* src counter info */
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unsigned int active;
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unsigned int fi_idx; /* function info idx */
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unsigned int ct_idx; /* counter type idx */
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size_t fi_size; /* function info size */
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size_t cv_size; /* counter values size */
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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);
|
||||||
|
}
|
99
sys/gnu/gcov/gcov.h
Normal file
99
sys/gnu/gcov/gcov.h
Normal file
@ -0,0 +1,99 @@
|
|||||||
|
/*-
|
||||||
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
||||||
|
*
|
||||||
|
* Copyright (c) 2019, Matthew Macy <mmacy@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
|
945
sys/gnu/gcov/gcov_fs.c
Normal file
945
sys/gnu/gcov/gcov_fs.c
Normal file
@ -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@linux.vnet.ibm.com>
|
||||||
|
*
|
||||||
|
* Uses gcc-internal data definitions.
|
||||||
|
* Based on the gcov-kernel patch by:
|
||||||
|
* Hubertus Franke <frankeh@us.ibm.com>
|
||||||
|
* Nigel Hinds <nhinds@us.ibm.com>
|
||||||
|
* Rajan Ravindran <rajancr@us.ibm.com>
|
||||||
|
* Peter Oberparleiter <oberpar@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];
|
||||||
|
};
|
||||||
|
|
||||||
|
#ifdef notyet
|
||||||
|
static const char objtree[] = OBJTREE;
|
||||||
|
static const char srctree[] = SRCTREE;
|
||||||
|
#else
|
||||||
|
static const char objtree[] = "";
|
||||||
|
static const char srctree[] = "";
|
||||||
|
#endif
|
||||||
|
static struct gcov_node root_node;
|
||||||
|
static struct {
|
||||||
|
struct gcov_node *lh_first;
|
||||||
|
} all_head;
|
||||||
|
static struct mtx node_lock;
|
||||||
|
MTX_SYSINIT(node_init, &node_lock, "node_lock", MTX_DEF);
|
||||||
|
static void remove_node(struct gcov_node *node);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* seq_file.start() implementation for gcov data files. Note that the
|
||||||
|
* gcov_iterator interface is designed to be more restrictive than seq_file
|
||||||
|
* (no start from arbitrary position, etc.), to simplify the iterator
|
||||||
|
* implementation.
|
||||||
|
*/
|
||||||
|
static void *
|
||||||
|
gcov_seq_start(struct seq_file *seq, off_t *pos)
|
||||||
|
{
|
||||||
|
off_t i;
|
||||||
|
|
||||||
|
gcov_iter_start(seq->private);
|
||||||
|
for (i = 0; i < *pos; i++) {
|
||||||
|
if (gcov_iter_next(seq->private))
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
return seq->private;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* seq_file.next() implementation for gcov data files. */
|
||||||
|
static void *
|
||||||
|
gcov_seq_next(struct seq_file *seq, void *data, off_t *pos)
|
||||||
|
{
|
||||||
|
struct gcov_iterator *iter = data;
|
||||||
|
|
||||||
|
if (gcov_iter_next(iter))
|
||||||
|
return NULL;
|
||||||
|
(*pos)++;
|
||||||
|
|
||||||
|
return iter;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* seq_file.show() implementation for gcov data files. */
|
||||||
|
static int
|
||||||
|
gcov_seq_show(struct seq_file *seq, void *data)
|
||||||
|
{
|
||||||
|
struct gcov_iterator *iter = data;
|
||||||
|
|
||||||
|
if (gcov_iter_write(iter, seq->buf))
|
||||||
|
return (-EINVAL);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
gcov_seq_stop(struct seq_file *seq, void *data)
|
||||||
|
{
|
||||||
|
/* Unused. */
|
||||||
|
}
|
||||||
|
|
||||||
|
static const struct seq_operations gcov_seq_ops = {
|
||||||
|
.start = gcov_seq_start,
|
||||||
|
.next = gcov_seq_next,
|
||||||
|
.show = gcov_seq_show,
|
||||||
|
.stop = gcov_seq_stop,
|
||||||
|
};
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Return a profiling data set associated with the given node. This is
|
||||||
|
* either a data set for a loaded object file or a data set copy in case
|
||||||
|
* all associated object files have been unloaded.
|
||||||
|
*/
|
||||||
|
static struct gcov_info *
|
||||||
|
get_node_info(struct gcov_node *node)
|
||||||
|
{
|
||||||
|
if (node->num_loaded > 0)
|
||||||
|
return (node->loaded_info[0]);
|
||||||
|
|
||||||
|
return (node->unloaded_info);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Return a newly allocated profiling data set which contains the sum of
|
||||||
|
* all profiling data associated with the given node.
|
||||||
|
*/
|
||||||
|
static struct gcov_info *
|
||||||
|
get_accumulated_info(struct gcov_node *node)
|
||||||
|
{
|
||||||
|
struct gcov_info *info;
|
||||||
|
int i = 0;
|
||||||
|
|
||||||
|
if (node->unloaded_info)
|
||||||
|
info = gcov_info_dup(node->unloaded_info);
|
||||||
|
else
|
||||||
|
info = gcov_info_dup(node->loaded_info[i++]);
|
||||||
|
if (info == NULL)
|
||||||
|
return (NULL);
|
||||||
|
for (; i < node->num_loaded; i++)
|
||||||
|
gcov_info_add(info, node->loaded_info[i]);
|
||||||
|
|
||||||
|
return (info);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* open() implementation for gcov data files. Create a copy of the profiling
|
||||||
|
* data set and initialize the iterator and seq_file interface.
|
||||||
|
*/
|
||||||
|
static int
|
||||||
|
gcov_seq_open(struct inode *inode, struct file *file)
|
||||||
|
{
|
||||||
|
struct gcov_node *node = inode->i_private;
|
||||||
|
struct gcov_iterator *iter;
|
||||||
|
struct seq_file *seq;
|
||||||
|
struct gcov_info *info;
|
||||||
|
int rc = -ENOMEM;
|
||||||
|
|
||||||
|
mtx_lock(&node_lock);
|
||||||
|
/*
|
||||||
|
* Read from a profiling data copy to minimize reference tracking
|
||||||
|
* complexity and concurrent access and to keep accumulating multiple
|
||||||
|
* profiling data sets associated with one node simple.
|
||||||
|
*/
|
||||||
|
info = get_accumulated_info(node);
|
||||||
|
if (info == NULL)
|
||||||
|
goto out_unlock;
|
||||||
|
iter = gcov_iter_new(info);
|
||||||
|
if (iter == NULL)
|
||||||
|
goto err_free_info;
|
||||||
|
rc = seq_open(file, &gcov_seq_ops);
|
||||||
|
if (rc)
|
||||||
|
goto err_free_iter_info;
|
||||||
|
seq = file->private_data;
|
||||||
|
seq->private = iter;
|
||||||
|
out_unlock:
|
||||||
|
mtx_unlock(&node_lock);
|
||||||
|
return (rc);
|
||||||
|
|
||||||
|
err_free_iter_info:
|
||||||
|
gcov_iter_free(iter);
|
||||||
|
err_free_info:
|
||||||
|
gcov_info_free(info);
|
||||||
|
goto out_unlock;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* release() implementation for gcov data files. Release resources allocated
|
||||||
|
* by open().
|
||||||
|
*/
|
||||||
|
static int
|
||||||
|
gcov_seq_release(struct inode *inode, struct file *file)
|
||||||
|
{
|
||||||
|
struct gcov_iterator *iter;
|
||||||
|
struct gcov_info *info;
|
||||||
|
struct seq_file *seq;
|
||||||
|
|
||||||
|
seq = file->private_data;
|
||||||
|
iter = seq->private;
|
||||||
|
info = gcov_iter_get_info(iter);
|
||||||
|
gcov_iter_free(iter);
|
||||||
|
gcov_info_free(info);
|
||||||
|
seq_release(inode, file);
|
||||||
|
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Find a node by the associated data file name. Needs to be called with
|
||||||
|
* node_lock held.
|
||||||
|
*/
|
||||||
|
static struct gcov_node *
|
||||||
|
get_node_by_name(const char *name)
|
||||||
|
{
|
||||||
|
struct gcov_node *node;
|
||||||
|
struct gcov_info *info;
|
||||||
|
|
||||||
|
LIST_FOREACH(node, &all_head, all_entry) {
|
||||||
|
info = get_node_info(node);
|
||||||
|
if (info && (strcmp(gcov_info_filename(info), name) == 0))
|
||||||
|
return (node);
|
||||||
|
}
|
||||||
|
|
||||||
|
return (NULL);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Reset all profiling data associated with the specified node.
|
||||||
|
*/
|
||||||
|
static void
|
||||||
|
reset_node(struct gcov_node *node)
|
||||||
|
{
|
||||||
|
int i;
|
||||||
|
|
||||||
|
if (node->unloaded_info)
|
||||||
|
gcov_info_reset(node->unloaded_info);
|
||||||
|
for (i = 0; i < node->num_loaded; i++)
|
||||||
|
gcov_info_reset(node->loaded_info[i]);
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
gcov_stats_reset(void)
|
||||||
|
{
|
||||||
|
struct gcov_node *node;
|
||||||
|
|
||||||
|
mtx_lock(&node_lock);
|
||||||
|
restart:
|
||||||
|
LIST_FOREACH(node, &all_head, all_entry) {
|
||||||
|
if (node->num_loaded > 0)
|
||||||
|
reset_node(node);
|
||||||
|
else if (LIST_EMPTY(&node->children)) {
|
||||||
|
remove_node(node);
|
||||||
|
goto restart;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
mtx_unlock(&node_lock);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* write() implementation for gcov data files. Reset profiling data for the
|
||||||
|
* corresponding file. If all associated object files have been unloaded,
|
||||||
|
* remove the debug fs node as well.
|
||||||
|
*/
|
||||||
|
static ssize_t
|
||||||
|
gcov_seq_write(struct file *file, const char *addr, size_t len, off_t *pos)
|
||||||
|
{
|
||||||
|
struct seq_file *seq;
|
||||||
|
struct gcov_info *info;
|
||||||
|
struct gcov_node *node;
|
||||||
|
|
||||||
|
seq = file->private_data;
|
||||||
|
info = gcov_iter_get_info(seq->private);
|
||||||
|
mtx_lock(&node_lock);
|
||||||
|
node = get_node_by_name(gcov_info_filename(info));
|
||||||
|
if (node) {
|
||||||
|
/* Reset counts or remove node for unloaded modules. */
|
||||||
|
if (node->num_loaded == 0)
|
||||||
|
remove_node(node);
|
||||||
|
else
|
||||||
|
reset_node(node);
|
||||||
|
}
|
||||||
|
/* Reset counts for open file. */
|
||||||
|
gcov_info_reset(info);
|
||||||
|
mtx_unlock(&node_lock);
|
||||||
|
|
||||||
|
return (len);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Given a string <path> representing a file path of format:
|
||||||
|
* path/to/file.gcda
|
||||||
|
* construct and return a new string:
|
||||||
|
* <dir/>path/to/file.<ext>
|
||||||
|
*/
|
||||||
|
static char *
|
||||||
|
link_target(const char *dir, const char *path, const char *ext)
|
||||||
|
{
|
||||||
|
char *target;
|
||||||
|
char *old_ext;
|
||||||
|
char *copy;
|
||||||
|
|
||||||
|
copy = strdup_flags(path, M_GCOV, M_NOWAIT);
|
||||||
|
if (!copy)
|
||||||
|
return (NULL);
|
||||||
|
old_ext = strrchr(copy, '.');
|
||||||
|
if (old_ext)
|
||||||
|
*old_ext = '\0';
|
||||||
|
target = NULL;
|
||||||
|
if (dir)
|
||||||
|
asprintf(&target, M_GCOV, "%s/%s.%s", dir, copy, ext);
|
||||||
|
else
|
||||||
|
asprintf(&target, M_GCOV, "%s.%s", copy, ext);
|
||||||
|
free(copy, M_GCOV);
|
||||||
|
|
||||||
|
return (target);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Construct a string representing the symbolic link target for the given
|
||||||
|
* gcov data file name and link type. Depending on the link type and the
|
||||||
|
* location of the data file, the link target can either point to a
|
||||||
|
* subdirectory of srctree, objtree or in an external location.
|
||||||
|
*/
|
||||||
|
static char *
|
||||||
|
get_link_target(const char *filename, const struct gcov_link *ext)
|
||||||
|
{
|
||||||
|
const char *rel;
|
||||||
|
char *result;
|
||||||
|
|
||||||
|
if (strncmp(filename, objtree, strlen(objtree)) == 0) {
|
||||||
|
rel = filename + strlen(objtree) + 1;
|
||||||
|
if (ext->dir == SRC_TREE)
|
||||||
|
result = link_target(srctree, rel, ext->ext);
|
||||||
|
else
|
||||||
|
result = link_target(objtree, rel, ext->ext);
|
||||||
|
} else {
|
||||||
|
/* External compilation. */
|
||||||
|
result = link_target(NULL, filename, ext->ext);
|
||||||
|
}
|
||||||
|
|
||||||
|
return (result);
|
||||||
|
}
|
||||||
|
|
||||||
|
#define SKEW_PREFIX ".tmp_"
|
||||||
|
|
||||||
|
/*
|
||||||
|
* For a filename .tmp_filename.ext return filename.ext. Needed to compensate
|
||||||
|
* for filename skewing caused by the mod-versioning mechanism.
|
||||||
|
*/
|
||||||
|
static const char *
|
||||||
|
deskew(const char *basename)
|
||||||
|
{
|
||||||
|
if (strncmp(basename, SKEW_PREFIX, sizeof(SKEW_PREFIX) - 1) == 0)
|
||||||
|
return (basename + sizeof(SKEW_PREFIX) - 1);
|
||||||
|
return (basename);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Create links to additional files (usually .c and .gcno files) which the
|
||||||
|
* gcov tool expects to find in the same directory as the gcov data file.
|
||||||
|
*/
|
||||||
|
static void
|
||||||
|
add_links(struct gcov_node *node, struct dentry *parent)
|
||||||
|
{
|
||||||
|
const char *path_basename;
|
||||||
|
char *target;
|
||||||
|
int num;
|
||||||
|
int i;
|
||||||
|
|
||||||
|
for (num = 0; gcov_link[num].ext; num++)
|
||||||
|
/* Nothing. */;
|
||||||
|
node->links = malloc((num*sizeof(struct dentry *)), M_GCOV, M_NOWAIT|M_ZERO);
|
||||||
|
if (node->links == NULL)
|
||||||
|
return;
|
||||||
|
for (i = 0; i < num; i++) {
|
||||||
|
target = get_link_target(
|
||||||
|
gcov_info_filename(get_node_info(node)),
|
||||||
|
&gcov_link[i]);
|
||||||
|
if (target == NULL)
|
||||||
|
goto out_err;
|
||||||
|
path_basename = basename(target);
|
||||||
|
if (path_basename == target)
|
||||||
|
goto out_err;
|
||||||
|
node->links[i] = debugfs_create_symlink(deskew(path_basename),
|
||||||
|
parent, target);
|
||||||
|
if (!node->links[i])
|
||||||
|
goto out_err;
|
||||||
|
free(target, M_GCOV);
|
||||||
|
}
|
||||||
|
|
||||||
|
return;
|
||||||
|
out_err:
|
||||||
|
free(target, M_GCOV);
|
||||||
|
while (i-- > 0)
|
||||||
|
debugfs_remove(node->links[i]);
|
||||||
|
free(node->links, M_GCOV);
|
||||||
|
node->links = NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
static const struct file_operations gcov_data_fops = {
|
||||||
|
.open = gcov_seq_open,
|
||||||
|
.release = gcov_seq_release,
|
||||||
|
.read = seq_read,
|
||||||
|
.llseek = seq_lseek,
|
||||||
|
.write = gcov_seq_write,
|
||||||
|
};
|
||||||
|
|
||||||
|
/* Basic initialization of a new node. */
|
||||||
|
static void
|
||||||
|
init_node(struct gcov_node *node, struct gcov_info *info,
|
||||||
|
const char *name, struct gcov_node *parent)
|
||||||
|
{
|
||||||
|
LIST_INIT(&node->children);
|
||||||
|
if (node->loaded_info) {
|
||||||
|
node->loaded_info[0] = info;
|
||||||
|
node->num_loaded = 1;
|
||||||
|
}
|
||||||
|
node->parent = parent;
|
||||||
|
if (name)
|
||||||
|
strcpy(node->name, name);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Create a new node and associated debugfs entry. Needs to be called with
|
||||||
|
* node_lock held.
|
||||||
|
*/
|
||||||
|
static struct gcov_node *
|
||||||
|
new_node(struct gcov_node *parent, struct gcov_info *info, const char *name)
|
||||||
|
{
|
||||||
|
struct gcov_node *node;
|
||||||
|
|
||||||
|
node = malloc(sizeof(struct gcov_node) + strlen(name) + 1, M_GCOV, M_NOWAIT|M_ZERO);
|
||||||
|
if (!node)
|
||||||
|
goto err_nomem;
|
||||||
|
if (info) {
|
||||||
|
node->loaded_info = malloc(sizeof(struct gcov_info *), M_GCOV, M_NOWAIT|M_ZERO);
|
||||||
|
if (!node->loaded_info)
|
||||||
|
goto err_nomem;
|
||||||
|
}
|
||||||
|
init_node(node, info, name, parent);
|
||||||
|
/* Differentiate between gcov data file nodes and directory nodes. */
|
||||||
|
if (info) {
|
||||||
|
node->dentry = debugfs_create_file(deskew(node->name), 0600,
|
||||||
|
parent->dentry, node, &gcov_data_fops);
|
||||||
|
} else
|
||||||
|
node->dentry = debugfs_create_dir(node->name, parent->dentry);
|
||||||
|
if (!node->dentry) {
|
||||||
|
log(LOG_WARNING, "could not create file\n");
|
||||||
|
free(node, M_GCOV);
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
if (info)
|
||||||
|
add_links(node, parent->dentry);
|
||||||
|
LIST_INSERT_HEAD(&parent->children, node, children_entry);
|
||||||
|
LIST_INSERT_HEAD(&all_head, node, all_entry);
|
||||||
|
|
||||||
|
return (node);
|
||||||
|
|
||||||
|
err_nomem:
|
||||||
|
free(node, M_GCOV);
|
||||||
|
log(LOG_WARNING, "out of memory\n");
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Remove symbolic links associated with node. */
|
||||||
|
static void
|
||||||
|
remove_links(struct gcov_node *node)
|
||||||
|
{
|
||||||
|
|
||||||
|
if (node->links == NULL)
|
||||||
|
return;
|
||||||
|
for (int i = 0; gcov_link[i].ext; i++)
|
||||||
|
debugfs_remove(node->links[i]);
|
||||||
|
free(node->links, M_GCOV);
|
||||||
|
node->links = NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Remove node from all lists and debugfs and release associated resources.
|
||||||
|
* Needs to be called with node_lock held.
|
||||||
|
*/
|
||||||
|
static void
|
||||||
|
release_node(struct gcov_node *node)
|
||||||
|
{
|
||||||
|
LIST_REMOVE(node, children_entry);
|
||||||
|
LIST_REMOVE(node, all_entry);
|
||||||
|
debugfs_remove(node->dentry);
|
||||||
|
remove_links(node);
|
||||||
|
free(node->loaded_info, M_GCOV);
|
||||||
|
if (node->unloaded_info)
|
||||||
|
gcov_info_free(node->unloaded_info);
|
||||||
|
free(node, M_GCOV);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Release node and empty parents. Needs to be called with node_lock held. */
|
||||||
|
static void
|
||||||
|
remove_node(struct gcov_node *node)
|
||||||
|
{
|
||||||
|
struct gcov_node *parent;
|
||||||
|
|
||||||
|
while ((node != &root_node) && LIST_EMPTY(&node->children)) {
|
||||||
|
parent = node->parent;
|
||||||
|
release_node(node);
|
||||||
|
node = parent;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Find child node with given basename. Needs to be called with node_lock
|
||||||
|
* held.
|
||||||
|
*/
|
||||||
|
static struct gcov_node *
|
||||||
|
get_child_by_name(struct gcov_node *parent, const char *name)
|
||||||
|
{
|
||||||
|
struct gcov_node *node;
|
||||||
|
|
||||||
|
LIST_FOREACH(node, &parent->children, children_entry) {
|
||||||
|
if (strcmp(node->name, name) == 0)
|
||||||
|
return (node);
|
||||||
|
}
|
||||||
|
|
||||||
|
return (NULL);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Create a node for a given profiling data set and add it to all lists and
|
||||||
|
* debugfs. Needs to be called with node_lock held.
|
||||||
|
*/
|
||||||
|
static void
|
||||||
|
add_node(struct gcov_info *info)
|
||||||
|
{
|
||||||
|
char *filename;
|
||||||
|
char *curr;
|
||||||
|
char *next;
|
||||||
|
struct gcov_node *parent;
|
||||||
|
struct gcov_node *node;
|
||||||
|
|
||||||
|
filename = strdup_flags(gcov_info_filename(info), M_GCOV, M_NOWAIT);
|
||||||
|
if (filename == NULL)
|
||||||
|
return;
|
||||||
|
parent = &root_node;
|
||||||
|
/* Create directory nodes along the path. */
|
||||||
|
for (curr = filename; (next = strchr(curr, '/')); curr = next + 1) {
|
||||||
|
if (curr == next)
|
||||||
|
continue;
|
||||||
|
*next = 0;
|
||||||
|
if (strcmp(curr, ".") == 0)
|
||||||
|
continue;
|
||||||
|
if (strcmp(curr, "..") == 0) {
|
||||||
|
if (!parent->parent)
|
||||||
|
goto err_remove;
|
||||||
|
parent = parent->parent;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
node = get_child_by_name(parent, curr);
|
||||||
|
if (!node) {
|
||||||
|
node = new_node(parent, NULL, curr);
|
||||||
|
if (!node)
|
||||||
|
goto err_remove;
|
||||||
|
}
|
||||||
|
parent = node;
|
||||||
|
}
|
||||||
|
/* Create file node. */
|
||||||
|
node = new_node(parent, info, curr);
|
||||||
|
if (!node)
|
||||||
|
goto err_remove;
|
||||||
|
out:
|
||||||
|
free(filename, M_GCOV);
|
||||||
|
return;
|
||||||
|
|
||||||
|
err_remove:
|
||||||
|
remove_node(parent);
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Associate a profiling data set with an existing node. Needs to be called
|
||||||
|
* with node_lock held.
|
||||||
|
*/
|
||||||
|
static void
|
||||||
|
add_info(struct gcov_node *node, struct gcov_info *info)
|
||||||
|
{
|
||||||
|
struct gcov_info **loaded_info;
|
||||||
|
int num = node->num_loaded;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Prepare new array. This is done first to simplify cleanup in
|
||||||
|
* case the new data set is incompatible, the node only contains
|
||||||
|
* unloaded data sets and there's not enough memory for the array.
|
||||||
|
*/
|
||||||
|
loaded_info = malloc((num + 1)* sizeof(struct gcov_info *), M_GCOV, M_NOWAIT|M_ZERO);
|
||||||
|
if (!loaded_info) {
|
||||||
|
log(LOG_WARNING, "could not add '%s' (out of memory)\n",
|
||||||
|
gcov_info_filename(info));
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
memcpy(loaded_info, node->loaded_info,
|
||||||
|
num * sizeof(struct gcov_info *));
|
||||||
|
loaded_info[num] = info;
|
||||||
|
/* Check if the new data set is compatible. */
|
||||||
|
if (num == 0) {
|
||||||
|
/*
|
||||||
|
* A module was unloaded, modified and reloaded. The new
|
||||||
|
* data set replaces the copy of the last one.
|
||||||
|
*/
|
||||||
|
if (!gcov_info_is_compatible(node->unloaded_info, info)) {
|
||||||
|
log(LOG_WARNING, "discarding saved data for %s "
|
||||||
|
"(incompatible version)\n",
|
||||||
|
gcov_info_filename(info));
|
||||||
|
gcov_info_free(node->unloaded_info);
|
||||||
|
node->unloaded_info = NULL;
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
/*
|
||||||
|
* Two different versions of the same object file are loaded.
|
||||||
|
* The initial one takes precedence.
|
||||||
|
*/
|
||||||
|
if (!gcov_info_is_compatible(node->loaded_info[0], info)) {
|
||||||
|
log(LOG_WARNING, "could not add '%s' (incompatible "
|
||||||
|
"version)\n", gcov_info_filename(info));
|
||||||
|
free(loaded_info, M_GCOV);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
/* Overwrite previous array. */
|
||||||
|
free(node->loaded_info, M_GCOV);
|
||||||
|
node->loaded_info = loaded_info;
|
||||||
|
node->num_loaded = num + 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Return the index of a profiling data set associated with a node.
|
||||||
|
*/
|
||||||
|
static int
|
||||||
|
get_info_index(struct gcov_node *node, struct gcov_info *info)
|
||||||
|
{
|
||||||
|
int i;
|
||||||
|
|
||||||
|
for (i = 0; i < node->num_loaded; i++) {
|
||||||
|
if (node->loaded_info[i] == info)
|
||||||
|
return (i);
|
||||||
|
}
|
||||||
|
return (ENOENT);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Save the data of a profiling data set which is being unloaded.
|
||||||
|
*/
|
||||||
|
static void
|
||||||
|
save_info(struct gcov_node *node, struct gcov_info *info)
|
||||||
|
{
|
||||||
|
if (node->unloaded_info)
|
||||||
|
gcov_info_add(node->unloaded_info, info);
|
||||||
|
else {
|
||||||
|
node->unloaded_info = gcov_info_dup(info);
|
||||||
|
if (!node->unloaded_info) {
|
||||||
|
log(LOG_WARNING, "could not save data for '%s' "
|
||||||
|
"(out of memory)\n",
|
||||||
|
gcov_info_filename(info));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Disassociate a profiling data set from a node. Needs to be called with
|
||||||
|
* node_lock held.
|
||||||
|
*/
|
||||||
|
static void
|
||||||
|
remove_info(struct gcov_node *node, struct gcov_info *info)
|
||||||
|
{
|
||||||
|
int i;
|
||||||
|
|
||||||
|
i = get_info_index(node, info);
|
||||||
|
if (i < 0) {
|
||||||
|
log(LOG_WARNING, "could not remove '%s' (not found)\n",
|
||||||
|
gcov_info_filename(info));
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
if (gcov_persist)
|
||||||
|
save_info(node, info);
|
||||||
|
/* Shrink array. */
|
||||||
|
node->loaded_info[i] = node->loaded_info[node->num_loaded - 1];
|
||||||
|
node->num_loaded--;
|
||||||
|
if (node->num_loaded > 0)
|
||||||
|
return;
|
||||||
|
/* Last loaded data set was removed. */
|
||||||
|
free(node->loaded_info, M_GCOV);
|
||||||
|
node->loaded_info = NULL;
|
||||||
|
node->num_loaded = 0;
|
||||||
|
if (!node->unloaded_info)
|
||||||
|
remove_node(node);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Callback to create/remove profiling files when code compiled with
|
||||||
|
* -fprofile-arcs is loaded/unloaded.
|
||||||
|
*/
|
||||||
|
static void
|
||||||
|
gcov_event(enum gcov_action action, struct gcov_info *info)
|
||||||
|
{
|
||||||
|
struct gcov_node *node;
|
||||||
|
|
||||||
|
mtx_lock(&node_lock);
|
||||||
|
node = get_node_by_name(gcov_info_filename(info));
|
||||||
|
switch (action) {
|
||||||
|
case GCOV_ADD:
|
||||||
|
if (node)
|
||||||
|
add_info(node, info);
|
||||||
|
else
|
||||||
|
add_node(info);
|
||||||
|
break;
|
||||||
|
case GCOV_REMOVE:
|
||||||
|
if (node)
|
||||||
|
remove_info(node, info);
|
||||||
|
else {
|
||||||
|
log(LOG_WARNING, "could not remove '%s' (not found)\n",
|
||||||
|
gcov_info_filename(info));
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
mtx_unlock(&node_lock);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* gcov_enable_events - enable event reporting through gcov_event()
|
||||||
|
*
|
||||||
|
* Turn on reporting of profiling data load/unload-events through the
|
||||||
|
* gcov_event() callback. Also replay all previous events once. This function
|
||||||
|
* is needed because some events are potentially generated too early for the
|
||||||
|
* callback implementation to handle them initially.
|
||||||
|
*/
|
||||||
|
void
|
||||||
|
gcov_enable_events(void)
|
||||||
|
{
|
||||||
|
struct gcov_info *info = NULL;
|
||||||
|
int count;
|
||||||
|
|
||||||
|
mtx_lock(&gcov_mtx);
|
||||||
|
count = 0;
|
||||||
|
|
||||||
|
/* Perform event callback for previously registered entries. */
|
||||||
|
while ((info = gcov_info_next(info))) {
|
||||||
|
gcov_event(GCOV_ADD, info);
|
||||||
|
sched_relinquish(curthread);
|
||||||
|
count++;
|
||||||
|
}
|
||||||
|
|
||||||
|
mtx_unlock(&gcov_mtx);
|
||||||
|
printf("%s found %d events\n", __func__, count);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Update list and generate events when modules are unloaded. */
|
||||||
|
void
|
||||||
|
gcov_module_unload(void *arg __unused, module_t mod)
|
||||||
|
{
|
||||||
|
struct gcov_info *info = NULL;
|
||||||
|
struct gcov_info *prev = NULL;
|
||||||
|
|
||||||
|
mtx_lock(&gcov_mtx );
|
||||||
|
|
||||||
|
/* Remove entries located in module from linked list. */
|
||||||
|
while ((info = gcov_info_next(info))) {
|
||||||
|
if (within_module((vm_offset_t)info, mod)) {
|
||||||
|
gcov_info_unlink(prev, info);
|
||||||
|
if (gcov_events_enabled)
|
||||||
|
gcov_event(GCOV_REMOVE, info);
|
||||||
|
} else
|
||||||
|
prev = info;
|
||||||
|
}
|
||||||
|
|
||||||
|
mtx_unlock(&gcov_mtx);
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
gcov_fs_init(void)
|
||||||
|
{
|
||||||
|
init_node(&root_node, NULL, NULL, NULL);
|
||||||
|
root_node.dentry = debugfs_create_dir("gcov", NULL);
|
||||||
|
}
|
169
sys/gnu/gcov/gcov_subr.c
Normal file
169
sys/gnu/gcov/gcov_subr.c
Normal file
@ -0,0 +1,169 @@
|
|||||||
|
/*-
|
||||||
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
||||||
|
*
|
||||||
|
* Copyright (c) 2019, Matthew Macy <mmacy@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.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
#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 <gnu/gcov/gcov.h>
|
||||||
|
#include <sys/queue.h>
|
||||||
|
#include "linker_if.h"
|
||||||
|
|
||||||
|
|
||||||
|
static void gcov_invoke_ctors(void);
|
||||||
|
static int gcov_ctors_done;
|
||||||
|
int gcov_events_enabled;
|
||||||
|
|
||||||
|
static int
|
||||||
|
gcov_stats_reset_sysctl(SYSCTL_HANDLER_ARGS)
|
||||||
|
{
|
||||||
|
int error, v;
|
||||||
|
|
||||||
|
v = 0;
|
||||||
|
error = sysctl_handle_int(oidp, &v, 0, req);
|
||||||
|
if (error)
|
||||||
|
return (error);
|
||||||
|
if (req->newptr == NULL)
|
||||||
|
return (error);
|
||||||
|
if (v == 0)
|
||||||
|
return (0);
|
||||||
|
gcov_stats_reset();
|
||||||
|
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
gcov_stats_enable_sysctl(SYSCTL_HANDLER_ARGS)
|
||||||
|
{
|
||||||
|
int error, v;
|
||||||
|
|
||||||
|
v = gcov_events_enabled;
|
||||||
|
error = sysctl_handle_int(oidp, &v, v, req);
|
||||||
|
if (error)
|
||||||
|
return (error);
|
||||||
|
if (req->newptr == NULL)
|
||||||
|
return (error);
|
||||||
|
if (v == gcov_events_enabled)
|
||||||
|
return (0);
|
||||||
|
//gcov_events_reset();
|
||||||
|
gcov_events_enabled = !!v;
|
||||||
|
if (!gcov_ctors_done)
|
||||||
|
gcov_invoke_ctors();
|
||||||
|
if (gcov_events_enabled)
|
||||||
|
gcov_enable_events();
|
||||||
|
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
within_module(vm_offset_t addr, module_t mod)
|
||||||
|
{
|
||||||
|
linker_file_t link_info;
|
||||||
|
vm_offset_t mod_addr;
|
||||||
|
size_t mod_size;
|
||||||
|
|
||||||
|
link_info = module_file(mod);
|
||||||
|
mod_addr = (vm_offset_t)link_info->address;
|
||||||
|
mod_size = link_info->size;
|
||||||
|
if (addr >= mod_addr && addr < mod_addr + mod_size)
|
||||||
|
return (1);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
#define GCOV_PREFIX "_GLOBAL__sub_I_65535_0_"
|
||||||
|
|
||||||
|
static int
|
||||||
|
gcov_invoke_ctor(const char *name, void *arg)
|
||||||
|
{
|
||||||
|
void (*ctor)(void);
|
||||||
|
c_linker_sym_t sym;
|
||||||
|
linker_symval_t symval;
|
||||||
|
linker_file_t lf;
|
||||||
|
|
||||||
|
if (strstr(name, GCOV_PREFIX) == NULL)
|
||||||
|
return (0);
|
||||||
|
lf = arg;
|
||||||
|
LINKER_LOOKUP_SYMBOL(lf, name, &sym);
|
||||||
|
LINKER_SYMBOL_VALUES(lf, sym, &symval);
|
||||||
|
ctor = (void *)symval.value;
|
||||||
|
ctor();
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
gcov_invoke_lf_ctors(linker_file_t lf, void *arg __unused)
|
||||||
|
{
|
||||||
|
|
||||||
|
printf("%s processing file: %s\n", __func__, lf->filename);
|
||||||
|
LINKER_EACH_FUNCTION_NAME(lf, gcov_invoke_ctor, lf);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
gcov_invoke_ctors(void)
|
||||||
|
{
|
||||||
|
|
||||||
|
gcov_fs_init();
|
||||||
|
|
||||||
|
linker_file_foreach(gcov_invoke_lf_ctors, NULL);
|
||||||
|
gcov_ctors_done = 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
gcov_init(void *arg __unused)
|
||||||
|
{
|
||||||
|
EVENTHANDLER_REGISTER(module_unload, gcov_module_unload, NULL, 0);
|
||||||
|
gcov_enable_events();
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
SYSINIT(gcov_init, SI_SUB_EVENTHANDLER, SI_ORDER_ANY, gcov_init, NULL);
|
||||||
|
|
||||||
|
static SYSCTL_NODE(_debug, OID_AUTO, gcov, CTLFLAG_RD, NULL,
|
||||||
|
"gcov code coverage");
|
||||||
|
SYSCTL_PROC(_debug_gcov, OID_AUTO, reset, CTLTYPE_INT | CTLFLAG_RW,
|
||||||
|
NULL, 0, gcov_stats_reset_sysctl, "I", "Reset all profiling counts");
|
||||||
|
SYSCTL_PROC(_debug_gcov, OID_AUTO, enable, CTLTYPE_INT | CTLFLAG_RW,
|
||||||
|
NULL, 0, gcov_stats_enable_sysctl, "I", "Enable code coverage");
|
Loading…
Reference in New Issue
Block a user