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authorLinus Torvalds <torvalds@linux-foundation.org>2019-07-18 11:51:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-18 11:51:00 -0700
commit818e95c768c6607a1df4cf022c00c3c58e2f203e (patch)
tree453a2b891097c379f1f133f4821a46628d86002b /tools/perf/util/probe-finder.c
parentd4df33b0e9925c158b313a586fb1557cf29cfdf4 (diff)
parent0aeb1def44169cbe7119f26cf10b974a2046142e (diff)
downloadlinux-818e95c768c6607a1df4cf022c00c3c58e2f203e.tar.bz2
Merge tag 'trace-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt: "The main changes in this release include: - Add user space specific memory reading for kprobes - Allow kprobes to be executed earlier in boot The rest are mostly just various clean ups and small fixes" * tag 'trace-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (33 commits) tracing: Make trace_get_fields() global tracing: Let filter_assign_type() detect FILTER_PTR_STRING tracing: Pass type into tracing_generic_entry_update() ftrace/selftest: Test if set_event/ftrace_pid exists before writing ftrace/selftests: Return the skip code when tracing directory not configured in kernel tracing/kprobe: Check registered state using kprobe tracing/probe: Add trace_event_call accesses APIs tracing/probe: Add probe event name and group name accesses APIs tracing/probe: Add trace flag access APIs for trace_probe tracing/probe: Add trace_event_file access APIs for trace_probe tracing/probe: Add trace_event_call register API for trace_probe tracing/probe: Add trace_probe init and free functions tracing/uprobe: Set print format when parsing command tracing/kprobe: Set print format right after parsed command kprobes: Fix to init kprobes in subsys_initcall tracepoint: Use struct_size() in kmalloc() ring-buffer: Remove HAVE_64BIT_ALIGNED_ACCESS ftrace: Enable trampoline when rec count returns back to one tracing/kprobe: Do not run kprobe boot tests if kprobe_event is on cmdline tracing: Make a separate config for trace event self tests ...
Diffstat (limited to 'tools/perf/util/probe-finder.c')
-rw-r--r--tools/perf/util/probe-finder.c19
1 files changed, 12 insertions, 7 deletions
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 7d8c99734928..025fc4491993 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -280,7 +280,7 @@ static_var:
static int convert_variable_type(Dwarf_Die *vr_die,
struct probe_trace_arg *tvar,
- const char *cast)
+ const char *cast, bool user_access)
{
struct probe_trace_arg_ref **ref_ptr = &tvar->ref;
Dwarf_Die type;
@@ -320,7 +320,8 @@ static int convert_variable_type(Dwarf_Die *vr_die,
pr_debug("%s type is %s.\n",
dwarf_diename(vr_die), dwarf_diename(&type));
- if (cast && strcmp(cast, "string") == 0) { /* String type */
+ if (cast && (!strcmp(cast, "string") || !strcmp(cast, "ustring"))) {
+ /* String type */
ret = dwarf_tag(&type);
if (ret != DW_TAG_pointer_type &&
ret != DW_TAG_array_type) {
@@ -343,6 +344,7 @@ static int convert_variable_type(Dwarf_Die *vr_die,
pr_warning("Out of memory error\n");
return -ENOMEM;
}
+ (*ref_ptr)->user_access = user_access;
}
if (!die_compare_name(&type, "char") &&
!die_compare_name(&type, "unsigned char")) {
@@ -397,7 +399,7 @@ formatted:
static int convert_variable_fields(Dwarf_Die *vr_die, const char *varname,
struct perf_probe_arg_field *field,
struct probe_trace_arg_ref **ref_ptr,
- Dwarf_Die *die_mem)
+ Dwarf_Die *die_mem, bool user_access)
{
struct probe_trace_arg_ref *ref = *ref_ptr;
Dwarf_Die type;
@@ -434,6 +436,7 @@ static int convert_variable_fields(Dwarf_Die *vr_die, const char *varname,
*ref_ptr = ref;
}
ref->offset += dwarf_bytesize(&type) * field->index;
+ ref->user_access = user_access;
goto next;
} else if (tag == DW_TAG_pointer_type) {
/* Check the pointer and dereference */
@@ -505,17 +508,18 @@ static int convert_variable_fields(Dwarf_Die *vr_die, const char *varname,
}
}
ref->offset += (long)offs;
+ ref->user_access = user_access;
/* If this member is unnamed, we need to reuse this field */
if (!dwarf_diename(die_mem))
return convert_variable_fields(die_mem, varname, field,
- &ref, die_mem);
+ &ref, die_mem, user_access);
next:
/* Converting next field */
if (field->next)
return convert_variable_fields(die_mem, field->name,
- field->next, &ref, die_mem);
+ field->next, &ref, die_mem, user_access);
else
return 0;
}
@@ -541,11 +545,12 @@ static int convert_variable(Dwarf_Die *vr_die, struct probe_finder *pf)
else if (ret == 0 && pf->pvar->field) {
ret = convert_variable_fields(vr_die, pf->pvar->var,
pf->pvar->field, &pf->tvar->ref,
- &die_mem);
+ &die_mem, pf->pvar->user_access);
vr_die = &die_mem;
}
if (ret == 0)
- ret = convert_variable_type(vr_die, pf->tvar, pf->pvar->type);
+ ret = convert_variable_type(vr_die, pf->tvar, pf->pvar->type,
+ pf->pvar->user_access);
/* *expr will be cached in libdw. Don't free it. */
return ret;
}