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Commit c1bf2145 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

Merge tag 'perf-urgent-for-mingo' of... 

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:

 * It was possible to use an uninitialized buffer when reading
   kernel modules information and checking if the file was a
   /proc/sys/kernel/kptr_restrict'ed one, fix for this from
   Adrian Hunter.

 * The libbfd demangler doesn't handle cloned functions (e.g. symbol.clone.NUM),
   feed it unsuffixed symbol names, workaround from Andi Kleen.

 * Fix segfault in 'perf trace' when processing perf.data files with PERF_RECORD_MMAP2
   records, recently added but not handled in this tool, from David Ahern.

 * Fix libdl related build in old systems like Fedora 12, from David Ahern.

 * Make 'perf kmem' work again on non NUMA machines, fix from Jiri Olsa.

 * Fix probing symbols with optimization suffix in 'perf probe' where some
   operations that are entirely user level and involves vmlinux/DWARF were working
   but when the symbol name was fed to the kprobes tracer, the in kernel code
   would use /proc/kallsyms where the name had the suffix, from Masami Hiramatsu.

Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parents cf3b425d de95ab53

tools/perf/builtin-kmem.c

+1 −1
Original line number Diff line number Diff line
@@ -101,7 +101,7 @@ static int setup_cpunode_map(void) 


	dir1 = opendir(PATH_SYS_NODE);

	if (!dir1)

		return -1;

		return 0;



	while ((dent1 = readdir(dir1)) != NULL) {

		if (dent1->d_type != DT_DIR ||

tools/perf/builtin-trace.c

+1 −0
Original line number Diff line number Diff line
@@ -1055,6 +1055,7 @@ static int trace__replay(struct trace *trace) 


	trace->tool.sample	  = trace__process_sample;

	trace->tool.mmap	  = perf_event__process_mmap;

	trace->tool.mmap2	  = perf_event__process_mmap2;

	trace->tool.comm	  = perf_event__process_comm;

	trace->tool.exit	  = perf_event__process_exit;

	trace->tool.fork	  = perf_event__process_fork;

tools/perf/config/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -87,7 +87,7 @@ CFLAGS += -Wall 
CFLAGS += -Wextra

CFLAGS += -std=gnu99



EXTLIBS = -lelf -lpthread -lrt -lm

EXTLIBS = -lelf -lpthread -lrt -lm -ldl



ifeq ($(call try-cc,$(SOURCE_HELLO),$(CFLAGS) -Werror -fstack-protector-all,-fstack-protector-all),y)

  CFLAGS += -fstack-protector-all

tools/perf/util/machine.c

+1 −1
Original line number Diff line number Diff line
@@ -792,7 +792,7 @@ static int machine__create_modules(struct machine *machine) 
		modules = path;

	}



	if (symbol__restricted_filename(path, "/proc/modules"))

	if (symbol__restricted_filename(modules, "/proc/modules"))

		return -1;



	file = fopen(modules, "r");

tools/perf/util/probe-finder.c

+41 −36
Original line number Diff line number Diff line
@@ -118,7 +118,6 @@ static const Dwfl_Callbacks offline_callbacks = { 
static int debuginfo__init_offline_dwarf(struct debuginfo *self,

					 const char *path)

{

	Dwfl_Module *mod;

	int fd;



	fd = open(path, O_RDONLY);
@@ -129,11 +128,11 @@ static int debuginfo__init_offline_dwarf(struct debuginfo *self, 
	if (!self->dwfl)

		goto error;



	mod = dwfl_report_offline(self->dwfl, "", "", fd);

	if (!mod)

	self->mod = dwfl_report_offline(self->dwfl, "", "", fd);

	if (!self->mod)

		goto error;



	self->dbg = dwfl_module_getdwarf(mod, &self->bias);

	self->dbg = dwfl_module_getdwarf(self->mod, &self->bias);

	if (!self->dbg)

		goto error;
@@ -676,15 +675,15 @@ static int find_variable(Dwarf_Die *sc_die, struct probe_finder *pf) 
}



/* Convert subprogram DIE to trace point */

static int convert_to_trace_point(Dwarf_Die *sp_die, Dwarf_Addr paddr,

				  bool retprobe, struct probe_trace_point *tp)

static int convert_to_trace_point(Dwarf_Die *sp_die, Dwfl_Module *mod,

				  Dwarf_Addr paddr, bool retprobe,

				  struct probe_trace_point *tp)

{

	Dwarf_Addr eaddr, highaddr;

	const char *name;

	GElf_Sym sym;

	const char *symbol;



	/* Copy the name of probe point */

	name = dwarf_diename(sp_die);

	if (name) {

	/* Verify the address is correct */

	if (dwarf_entrypc(sp_die, &eaddr) != 0) {

		pr_warning("Failed to get entry address of %s\n",

			   dwarf_diename(sp_die));
@@ -700,13 +699,18 @@ static int convert_to_trace_point(Dwarf_Die *sp_die, Dwarf_Addr paddr, 
			   dwarf_diename(sp_die));

		return -EINVAL;

	}

		tp->symbol = strdup(name);

		if (tp->symbol == NULL)



	/* Get an appropriate symbol from symtab */

	symbol = dwfl_module_addrsym(mod, paddr, &sym, NULL);

	if (!symbol) {

		pr_warning("Failed to find symbol at 0x%lx\n",

			   (unsigned long)paddr);

		return -ENOENT;

	}

	tp->offset = (unsigned long)(paddr - sym.st_value);

	tp->symbol = strdup(symbol);

	if (!tp->symbol)

		return -ENOMEM;

		tp->offset = (unsigned long)(paddr - eaddr);

	} else

		/* This function has no name. */

		tp->offset = (unsigned long)paddr;



	/* Return probe must be on the head of a subprogram */

	if (retprobe) {
@@ -1149,7 +1153,7 @@ static int add_probe_trace_event(Dwarf_Die *sc_die, struct probe_finder *pf) 
	tev = &tf->tevs[tf->ntevs++];



	/* Trace point should be converted from subprogram DIE */

	ret = convert_to_trace_point(&pf->sp_die, pf->addr,

	ret = convert_to_trace_point(&pf->sp_die, tf->mod, pf->addr,

				     pf->pev->point.retprobe, &tev->point);

	if (ret < 0)

		return ret;
@@ -1181,7 +1185,7 @@ int debuginfo__find_trace_events(struct debuginfo *self, 
{

	struct trace_event_finder tf = {

			.pf = {.pev = pev, .callback = add_probe_trace_event},

			.max_tevs = max_tevs};

			.mod = self->mod, .max_tevs = max_tevs};

	int ret;



	/* Allocate result tevs array */
@@ -1250,7 +1254,7 @@ static int add_available_vars(Dwarf_Die *sc_die, struct probe_finder *pf) 
	vl = &af->vls[af->nvls++];



	/* Trace point should be converted from subprogram DIE */

	ret = convert_to_trace_point(&pf->sp_die, pf->addr,

	ret = convert_to_trace_point(&pf->sp_die, af->mod, pf->addr,

				     pf->pev->point.retprobe, &vl->point);

	if (ret < 0)

		return ret;
@@ -1289,6 +1293,7 @@ int debuginfo__find_available_vars_at(struct debuginfo *self, 
{

	struct available_var_finder af = {

			.pf = {.pev = pev, .callback = add_available_vars},

			.mod = self->mod,

			.max_vls = max_vls, .externs = externs};

	int ret;