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perf/urgent fixes:

Browse Source 
User visible:
 
 - Fix segfault when using both the map symtab viewer and annotation
   in the TUI (Namhyung Kim).
 
 Developer stuff:
 
 - uClibc build fixes (Alexey Brodkin, Vineet Gupta).
 
 - bitops/hweight were moved from tools/perf/ too tools/include, move
   some leftovers (Arnaldo Carvalho de Melo)
 
 - Fix dwarf unwind x86_64 build error (Namhyung Kim)
 
 - Fix __machine__findnew_thread() error path (Namhyung Kim)
 
 - Propagate error code when write(2) failed in 'perf probe' (Namhyung Kim)
 
 - Use dwfl_report_elf() instead of offline in powerpc bits to
   properly handle non prelinked DSOs (Sukadev Bhattiprolu).
 
 - Fix dwarf unwind using libunwind in 'perf test' (Wang Nan)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/urgent fixes from Arnaldo Carvalho de Melo:

  - Fix segfault when using both the map symtab viewer and annotation
    in the TUI (Namhyung Kim).

  - uClibc build fixes (Alexey Brodkin, Vineet Gupta).

  - bitops/hweight were moved from tools/perf/ too tools/include, move
    some leftovers (Arnaldo Carvalho de Melo)

  - Fix dwarf unwind x86_64 build error (Namhyung Kim)

  - Fix __machine__findnew_thread() error path (Namhyung Kim)

  - Propagate error code when write(2) failed in 'perf probe' (Namhyung Kim)

  - Use dwfl_report_elf() instead of offline in powerpc bits to
    properly handle non prelinked DSOs (Sukadev Bhattiprolu).

  - Fix dwarf unwind using libunwind in 'perf test' (Wang Nan)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2015-01-17 11:04:35 +01:00
commit d01de2389c
24 changed files with 131 additions and 82 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tools/include/asm-generic/bitops.h
View File

@ -22,6 +22,8 @@
#error only <linux/bitops.h> can be included directly
#endif
#include <asm-generic/bitops/hweight.h>
#include <asm-generic/bitops/atomic.h>
#endif /* __TOOLS_ASM_GENERIC_BITOPS_H */

1
tools/include/asm-generic/bitops/arch_hweight.h Normal file
View File

@ -0,0 +1 @@
#include "../../../../include/asm-generic/bitops/arch_hweight.h"

1
tools/include/asm-generic/bitops/const_hweight.h Normal file
View File

@ -0,0 +1 @@
#include "../../../../include/asm-generic/bitops/const_hweight.h"

7
tools/include/asm-generic/bitops/hweight.h Normal file
View File

@ -0,0 +1,7 @@
#ifndef _TOOLS_LINUX_ASM_GENERIC_BITOPS_HWEIGHT_H_
#define _TOOLS_LINUX_ASM_GENERIC_BITOPS_HWEIGHT_H_
#include <asm-generic/bitops/arch_hweight.h>
#include <asm-generic/bitops/const_hweight.h>
#endif /* _TOOLS_LINUX_ASM_GENERIC_BITOPS_HWEIGHT_H_ */

7
tools/include/linux/bitops.h
View File

@ -1,9 +1,9 @@
#ifndef _TOOLS_LINUX_BITOPS_H_
#define _TOOLS_LINUX_BITOPS_H_
#include <asm/types.h>
#include <linux/kernel.h>
#include <linux/compiler.h>
#include <asm/hweight.h>
#ifndef __WORDSIZE
#define __WORDSIZE (__SIZEOF_LONG__ * 8)
@ -19,6 +19,11 @@
#define BITS_TO_U32(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(u32))
#define BITS_TO_BYTES(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE)
extern unsigned int __sw_hweight8(unsigned int w);
extern unsigned int __sw_hweight16(unsigned int w);
extern unsigned int __sw_hweight32(unsigned int w);
extern unsigned long __sw_hweight64(__u64 w);
/*
* Include this here because some architectures need generic_ffs/fls in
* scope

2
tools/lib/api/fs/debugfs.c
View File

@ -67,7 +67,7 @@ int debugfs_valid_mountpoint(const char *debugfs)
if (statfs(debugfs, &st_fs) < 0)
return -ENOENT;
else if (st_fs.f_type != (long) DEBUGFS_MAGIC)
else if ((long)st_fs.f_type != (long)DEBUGFS_MAGIC)
return -ENOENT;
return 0;

2
tools/lib/api/fs/fs.c
View File

@ -79,7 +79,7 @@ static int fs__valid_mount(const char *fs, long magic)
if (statfs(fs, &st_fs) < 0)
return -ENOENT;
else if (st_fs.f_type != magic)
else if ((long)st_fs.f_type != magic)
return -ENOENT;
return 0;

6
tools/perf/MANIFEST
View File

@ -6,12 +6,15 @@ tools/lib/symbol/kallsyms.c
tools/lib/symbol/kallsyms.h
tools/lib/util/find_next_bit.c
tools/include/asm/bug.h
tools/include/asm-generic/bitops/arch_hweight.h
tools/include/asm-generic/bitops/atomic.h
tools/include/asm-generic/bitops/const_hweight.h
tools/include/asm-generic/bitops/__ffs.h
tools/include/asm-generic/bitops/__fls.h
tools/include/asm-generic/bitops/find.h
tools/include/asm-generic/bitops/fls64.h
tools/include/asm-generic/bitops/fls.h
tools/include/asm-generic/bitops/hweight.h
tools/include/asm-generic/bitops.h
tools/include/linux/bitops.h
tools/include/linux/compiler.h
@ -19,6 +22,8 @@ tools/include/linux/export.h
tools/include/linux/hash.h
tools/include/linux/log2.h
tools/include/linux/types.h
include/asm-generic/bitops/arch_hweight.h
include/asm-generic/bitops/const_hweight.h
include/asm-generic/bitops/fls64.h
include/asm-generic/bitops/__fls.h
include/asm-generic/bitops/fls.h
@ -29,6 +34,7 @@ include/linux/list.h
include/linux/hash.h
include/linux/stringify.h
lib/find_next_bit.c
lib/hweight.c
lib/rbtree.c
include/linux/swab.h
arch/*/include/asm/unistd*.h

11
tools/perf/Makefile.perf
View File

@ -232,12 +232,15 @@ LIB_H += ../include/linux/hash.h
LIB_H += ../../include/linux/stringify.h
LIB_H += util/include/linux/bitmap.h
LIB_H += ../include/linux/bitops.h
LIB_H += ../include/asm-generic/bitops/arch_hweight.h
LIB_H += ../include/asm-generic/bitops/atomic.h
LIB_H += ../include/asm-generic/bitops/const_hweight.h
LIB_H += ../include/asm-generic/bitops/find.h
LIB_H += ../include/asm-generic/bitops/fls64.h
LIB_H += ../include/asm-generic/bitops/fls.h
LIB_H += ../include/asm-generic/bitops/__ffs.h
LIB_H += ../include/asm-generic/bitops/__fls.h
LIB_H += ../include/asm-generic/bitops/hweight.h
LIB_H += ../include/asm-generic/bitops.h
LIB_H += ../include/linux/compiler.h
LIB_H += ../include/linux/log2.h
@ -255,7 +258,6 @@ LIB_H += util/include/linux/linkage.h
LIB_H += util/include/asm/asm-offsets.h
LIB_H += ../include/asm/bug.h
LIB_H += util/include/asm/byteorder.h
LIB_H += util/include/asm/hweight.h
LIB_H += util/include/asm/swab.h
LIB_H += util/include/asm/system.h
LIB_H += util/include/asm/uaccess.h
@ -462,10 +464,12 @@ BUILTIN_OBJS += $(OUTPUT)builtin-bench.o
# Benchmark modules
BUILTIN_OBJS += $(OUTPUT)bench/sched-messaging.o
BUILTIN_OBJS += $(OUTPUT)bench/sched-pipe.o
ifeq ($(RAW_ARCH),x86_64)
ifeq ($(ARCH), x86)
ifeq ($(IS_64_BIT), 1)
BUILTIN_OBJS += $(OUTPUT)bench/mem-memcpy-x86-64-asm.o
BUILTIN_OBJS += $(OUTPUT)bench/mem-memset-x86-64-asm.o
endif
endif
BUILTIN_OBJS += $(OUTPUT)bench/mem-memcpy.o
BUILTIN_OBJS += $(OUTPUT)bench/futex-hash.o
BUILTIN_OBJS += $(OUTPUT)bench/futex-wake.o
@ -743,6 +747,9 @@ $(OUTPUT)util/kallsyms.o: ../lib/symbol/kallsyms.c $(OUTPUT)PERF-CFLAGS
$(OUTPUT)util/rbtree.o: ../../lib/rbtree.c $(OUTPUT)PERF-CFLAGS
$(QUIET_CC)$(CC) -o $@ -c $(CFLAGS) -Wno-unused-parameter -DETC_PERFCONFIG='"$(ETC_PERFCONFIG_SQ)"' $<
$(OUTPUT)util/hweight.o: ../../lib/hweight.c $(OUTPUT)PERF-CFLAGS
$(QUIET_CC)$(CC) -o $@ -c $(CFLAGS) -Wno-unused-parameter -DETC_PERFCONFIG='"$(ETC_PERFCONFIG_SQ)"' $<
$(OUTPUT)util/find_next_bit.o: ../lib/util/find_next_bit.c $(OUTPUT)PERF-CFLAGS
$(QUIET_CC)$(CC) -o $@ -c $(CFLAGS) -Wno-unused-parameter -DETC_PERFCONFIG='"$(ETC_PERFCONFIG_SQ)"' $<

19
tools/perf/arch/powerpc/util/skip-callchain-idx.c
View File

@ -103,7 +103,7 @@ static Dwarf_Frame *get_eh_frame(Dwfl_Module *mod, Dwarf_Addr pc)
return NULL;
}
result = dwarf_cfi_addrframe(cfi, pc, &frame);
result = dwarf_cfi_addrframe(cfi, pc-bias, &frame);
if (result) {
pr_debug("%s(): %s\n", __func__, dwfl_errmsg(-1));
return NULL;
@ -128,7 +128,7 @@ static Dwarf_Frame *get_dwarf_frame(Dwfl_Module *mod, Dwarf_Addr pc)
return NULL;
}
result = dwarf_cfi_addrframe(cfi, pc, &frame);
result = dwarf_cfi_addrframe(cfi, pc-bias, &frame);
if (result) {
pr_debug("%s(): %s\n", __func__, dwfl_errmsg(-1));
return NULL;
@ -145,7 +145,7 @@ static Dwarf_Frame *get_dwarf_frame(Dwfl_Module *mod, Dwarf_Addr pc)
* yet used)
* -1 in case of errors
*/
static int check_return_addr(struct dso *dso, Dwarf_Addr pc)
static int check_return_addr(struct dso *dso, u64 map_start, Dwarf_Addr pc)
{
int rc = -1;
Dwfl *dwfl;
@ -155,6 +155,7 @@ static int check_return_addr(struct dso *dso, Dwarf_Addr pc)
Dwarf_Addr start = pc;
Dwarf_Addr end = pc;
bool signalp;
const char *exec_file = dso->long_name;
dwfl = dso->dwfl;
@ -165,8 +166,10 @@ static int check_return_addr(struct dso *dso, Dwarf_Addr pc)
return -1;
}
if (dwfl_report_offline(dwfl, "", dso->long_name, -1) == NULL) {
pr_debug("dwfl_report_offline() failed %s\n",
mod = dwfl_report_elf(dwfl, exec_file, exec_file, -1,
map_start, false);
if (!mod) {
pr_debug("dwfl_report_elf() failed %s\n",
dwarf_errmsg(-1));
/*
* We normally cache the DWARF debug info and never
@ -256,10 +259,10 @@ int arch_skip_callchain_idx(struct thread *thread, struct ip_callchain *chain)
return skip_slot;
}
rc = check_return_addr(dso, ip);
rc = check_return_addr(dso, al.map->start, ip);
pr_debug("DSO %s, nr %" PRIx64 ", ip 0x%" PRIx64 "rc %d\n",
dso->long_name, chain->nr, ip, rc);
pr_debug("[DSO %s, sym %s, ip 0x%" PRIx64 "] rc %d\n",
dso->long_name, al.sym->name, ip, rc);
if (rc == 0) {
/*

2
tools/perf/bench/sched-pipe.c
View File

@ -19,12 +19,12 @@
#include <stdlib.h>
#include <signal.h>
#include <sys/wait.h>
#include <linux/unistd.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/syscall.h>
#include <pthread.h>

1
tools/perf/builtin-top.c
View File

@ -66,7 +66,6 @@
#include <sys/utsname.h>
#include <sys/mman.h>
#include <linux/unistd.h>
#include <linux/types.h>
static volatile int done;

2
tools/perf/config/Makefile
View File

@ -20,7 +20,7 @@ NO_PERF_REGS := 1
# Additional ARCH settings for x86
ifeq ($(ARCH),x86)
ifeq (${IS_X86_64}, 1)
ifeq (${IS_64_BIT}, 1)
CFLAGS += -DHAVE_ARCH_X86_64_SUPPORT
ARCH_INCLUDE = ../../arch/x86/lib/memcpy_64.S ../../arch/x86/lib/memset_64.S
LIBUNWIND_LIBS = -lunwind -lunwind-x86_64

26
tools/perf/config/Makefile.arch
View File

@ -1,7 +1,7 @@
uname_M := $(shell uname -m 2>/dev/null || echo not)
ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
RAW_ARCH := $(shell echo $(uname_M) | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
-e s/arm.*/arm/ -e s/sa110/arm/ \
-e s/s390x/s390/ -e s/parisc64/parisc/ \
-e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
@ -9,23 +9,23 @@ ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
-e s/tile.*/tile/ )
# Additional ARCH settings for x86
ifeq ($(ARCH),i386)
override ARCH := x86
ifeq ($(RAW_ARCH),i386)
ARCH ?= x86
endif
ifeq ($(ARCH),x86_64)
override ARCH := x86
IS_X86_64 := 0
ifeq (, $(findstring m32,$(CFLAGS)))
IS_X86_64 := $(shell echo __x86_64__ | ${CC} -E -x c - | tail -n 1)
RAW_ARCH := x86_64
ifeq ($(RAW_ARCH),x86_64)
ARCH ?= x86
ifneq (, $(findstring m32,$(CFLAGS)))
RAW_ARCH := x86_32
endif
endif
ifeq (${IS_X86_64}, 1)
ARCH ?= $(RAW_ARCH)
LP64 := $(shell echo __LP64__ | ${CC} ${CFLAGS} -E -x c - | tail -n 1)
ifeq ($(LP64), 1)
IS_64_BIT := 1
else ifeq ($(ARCH),x86)
IS_64_BIT := 0
else
IS_64_BIT := $(shell echo __LP64__ | ${CC} ${CFLAGS} -E -x c - | tail -n 1)
IS_64_BIT := 0
endif

1
tools/perf/perf-sys.h
View File

@ -6,7 +6,6 @@
#include <sys/syscall.h>
#include <linux/types.h>
#include <linux/perf_event.h>
#include <asm/unistd.h>
#if defined(__i386__)
#define mb() asm volatile("lock; addl $0,0(%%esp)" ::: "memory")

36
tools/perf/tests/dwarf-unwind.c
View File

@ -11,6 +11,9 @@
#include "thread.h"
#include "callchain.h"
/* For bsearch. We try to unwind functions in shared object. */
#include <stdlib.h>
static int mmap_handler(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample __maybe_unused,
@ -28,7 +31,7 @@ static int init_live_machine(struct machine *machine)
mmap_handler, machine, true);
}
#define MAX_STACK 6
#define MAX_STACK 8
static int unwind_entry(struct unwind_entry *entry, void *arg)
{
@ -37,6 +40,8 @@ static int unwind_entry(struct unwind_entry *entry, void *arg)
static const char *funcs[MAX_STACK] = {
"test__arch_unwind_sample",
"unwind_thread",
"compare",
"bsearch",
"krava_3",
"krava_2",
"krava_1",
@ -88,10 +93,37 @@ static int unwind_thread(struct thread *thread)
return err;
}
static int global_unwind_retval = -INT_MAX;
__attribute__ ((noinline))
static int compare(void *p1, void *p2)
{
/* Any possible value should be 'thread' */
struct thread *thread = *(struct thread **)p1;
if (global_unwind_retval == -INT_MAX)
global_unwind_retval = unwind_thread(thread);
return p1 - p2;
}
__attribute__ ((noinline))
static int krava_3(struct thread *thread)
{
return unwind_thread(thread);
struct thread *array[2] = {thread, thread};
void *fp = &bsearch;
/*
* make _bsearch a volatile function pointer to
* prevent potential optimization, which may expand
* bsearch and call compare directly from this function,
* instead of libc shared object.
*/
void *(*volatile _bsearch)(void *, void *, size_t,
size_t, int (*)(void *, void *));
_bsearch = fp;
_bsearch(array, &thread, 2, sizeof(struct thread **), compare);
return global_unwind_retval;
}
__attribute__ ((noinline))

8
tools/perf/util/annotate.h
View File

@ -116,11 +116,6 @@ struct annotation {
struct annotated_source *src;
};
struct sannotation {
struct annotation annotation;
struct symbol symbol;
};
static inline struct sym_hist *annotation__histogram(struct annotation *notes, int idx)
{
return (((void *)&notes->src->histograms) +
@ -129,8 +124,7 @@ static inline struct sym_hist *annotation__histogram(struct annotation *notes, i
static inline struct annotation *symbol__annotation(struct symbol *sym)
{
struct sannotation *a = container_of(sym, struct sannotation, symbol);
return &a->annotation;
return (void *)sym - symbol_conf.priv_size;
}
int addr_map_symbol__inc_samples(struct addr_map_symbol *ams, int evidx);

2
tools/perf/util/cache.h
View File

@ -71,7 +71,9 @@ extern char *perf_path(const char *fmt, ...) __attribute__((format (printf, 1, 2
extern char *perf_pathdup(const char *fmt, ...)
__attribute__((format (printf, 1, 2)));
#ifndef __UCLIBC__
/* Matches the libc/libbsd function attribute so we declare this unconditionally: */
extern size_t strlcpy(char *dest, const char *src, size_t size);
#endif
#endif /* __PERF_CACHE_H */

31
tools/perf/util/hweight.c
View File

@ -1,31 +0,0 @@
#include <linux/bitops.h>
/**
* hweightN - returns the hamming weight of a N-bit word
* @x: the word to weigh
*
* The Hamming Weight of a number is the total number of bits set in it.
*/
unsigned int hweight32(unsigned int w)
{
unsigned int res = w - ((w >> 1) & 0x55555555);
res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
res = (res + (res >> 4)) & 0x0F0F0F0F;
res = res + (res >> 8);
return (res + (res >> 16)) & 0x000000FF;
}
unsigned long hweight64(__u64 w)
{
#if BITS_PER_LONG == 32
return hweight32((unsigned int)(w >> 32)) + hweight32((unsigned int)w);
#elif BITS_PER_LONG == 64
__u64 res = w - ((w >> 1) & 0x5555555555555555ul);
res = (res & 0x3333333333333333ul) + ((res >> 2) & 0x3333333333333333ul);
res = (res + (res >> 4)) & 0x0F0F0F0F0F0F0F0Ful;
res = res + (res >> 8);
res = res + (res >> 16);
return (res + (res >> 32)) & 0x00000000000000FFul;
#endif
}

8
tools/perf/util/include/asm/hweight.h
View File

@ -1,8 +0,0 @@
#ifndef PERF_HWEIGHT_H
#define PERF_HWEIGHT_H
#include <linux/types.h>
unsigned int hweight32(unsigned int w);
unsigned long hweight64(__u64 w);
#endif /* PERF_HWEIGHT_H */

4
tools/perf/util/machine.c
View File

@ -389,7 +389,6 @@ static struct thread *__machine__findnew_thread(struct machine *machine,
if (th != NULL) {
rb_link_node(&th->rb_node, parent, p);
rb_insert_color(&th->rb_node, &machine->threads);
machine->last_match = th;
/*
* We have to initialize map_groups separately
@ -400,9 +399,12 @@ static struct thread *__machine__findnew_thread(struct machine *machine,
* leader and that would screwed the rb tree.
*/
if (thread__init_map_groups(th, machine)) {
rb_erase(&th->rb_node, &machine->threads);
thread__delete(th);
return NULL;
}
machine->last_match = th;
}
return th;

4
tools/perf/util/probe-event.c
View File

@ -2052,9 +2052,11 @@ static int write_probe_trace_event(int fd, struct probe_trace_event *tev)
pr_debug("Writing event: %s\n", buf);
if (!probe_event_dry_run) {
ret = write(fd, buf, strlen(buf));
if (ret <= 0)
if (ret <= 0) {
ret = -errno;
pr_warning("Failed to write event: %s\n",
strerror_r(errno, sbuf, sizeof(sbuf)));
}
}
free(buf);
return ret;

2
tools/perf/util/python-ext-sources
View File

@ -10,7 +10,7 @@ util/ctype.c
util/evlist.c
util/evsel.c
util/cpumap.c
util/hweight.c
../../lib/hweight.c
util/thread_map.c
util/util.c
util/xyarray.c

28
tools/perf/util/unwind-libunwind.c
View File

@ -185,6 +185,28 @@ static u64 elf_section_offset(int fd, const char *name)
return offset;
}
#ifndef NO_LIBUNWIND_DEBUG_FRAME
static int elf_is_exec(int fd, const char *name)
{
Elf *elf;
GElf_Ehdr ehdr;
int retval = 0;
elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
if (elf == NULL)
return 0;
if (gelf_getehdr(elf, &ehdr) == NULL)
goto out;
retval = (ehdr.e_type == ET_EXEC);
out:
elf_end(elf);
pr_debug("unwind: elf_is_exec(%s): %d\n", name, retval);
return retval;
}
#endif
struct table_entry {
u32 start_ip_offset;
u32 fde_offset;
@ -322,8 +344,12 @@ find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
#ifndef NO_LIBUNWIND_DEBUG_FRAME
/* Check the .debug_frame section for unwinding info */
if (!read_unwind_spec_debug_frame(map->dso, ui->machine, &segbase)) {
int fd = dso__data_fd(map->dso, ui->machine);
int is_exec = elf_is_exec(fd, map->dso->name);
unw_word_t base = is_exec ? 0 : map->start;
memset(&di, 0, sizeof(di));
if (dwarf_find_debug_frame(0, &di, ip, 0, map->dso->name,
if (dwarf_find_debug_frame(0, &di, ip, base, map->dso->name,
map->start, map->end))
return dwarf_search_unwind_table(as, ip, &di, pi,
need_unwind_info, arg);