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Diffstat (limited to 'tools/perf/util/probe-finder.c')
-rw-r--r--tools/perf/util/probe-finder.c81
1 files changed, 55 insertions, 26 deletions
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 6b40cc691a2d..8f4cf2e2b5aa 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -100,6 +100,7 @@ enum dso_binary_type distro_dwarf_types[] = {
DSO_BINARY_TYPE__UBUNTU_DEBUGINFO,
DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO,
DSO_BINARY_TYPE__BUILDID_DEBUGINFO,
+ DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO,
DSO_BINARY_TYPE__NOT_FOUND,
};
@@ -598,38 +599,31 @@ static int convert_to_trace_point(Dwarf_Die *sp_die, Dwfl_Module *mod,
const char *function,
struct probe_trace_point *tp)
{
- Dwarf_Addr eaddr, highaddr;
+ Dwarf_Addr eaddr;
GElf_Sym sym;
const char *symbol;
/* 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));
- return -ENOENT;
- }
- if (dwarf_highpc(sp_die, &highaddr) != 0) {
- pr_warning("Failed to get end address of %s\n",
- dwarf_diename(sp_die));
- return -ENOENT;
- }
- if (paddr > highaddr) {
- pr_warning("Offset specified is greater than size of %s\n",
+ if (!dwarf_haspc(sp_die, paddr)) {
+ pr_warning("Specified offset is out of %s\n",
dwarf_diename(sp_die));
return -EINVAL;
}
- symbol = dwarf_diename(sp_die);
- if (!symbol) {
- /* Try to get the symbol name from symtab */
+ if (dwarf_entrypc(sp_die, &eaddr) == 0) {
+ /* If the DIE has entrypc, use it. */
+ symbol = dwarf_diename(sp_die);
+ } else {
+ /* Try to get actual symbol name and address 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;
- }
eaddr = sym.st_value;
}
+ if (!symbol) {
+ pr_warning("Failed to find symbol at 0x%lx\n",
+ (unsigned long)paddr);
+ return -ENOENT;
+ }
+
tp->offset = (unsigned long)(paddr - eaddr);
tp->address = (unsigned long)paddr;
tp->symbol = strdup(symbol);
@@ -750,6 +744,16 @@ static int find_best_scope_cb(Dwarf_Die *fn_die, void *data)
return 0;
}
+/* Return innermost DIE */
+static int find_inner_scope_cb(Dwarf_Die *fn_die, void *data)
+{
+ struct find_scope_param *fsp = data;
+
+ memcpy(fsp->die_mem, fn_die, sizeof(Dwarf_Die));
+ fsp->found = true;
+ return 1;
+}
+
/* Find an appropriate scope fits to given conditions */
static Dwarf_Die *find_best_scope(struct probe_finder *pf, Dwarf_Die *die_mem)
{
@@ -761,8 +765,13 @@ static Dwarf_Die *find_best_scope(struct probe_finder *pf, Dwarf_Die *die_mem)
.die_mem = die_mem,
.found = false,
};
+ int ret;
- cu_walk_functions_at(&pf->cu_die, pf->addr, find_best_scope_cb, &fsp);
+ ret = cu_walk_functions_at(&pf->cu_die, pf->addr, find_best_scope_cb,
+ &fsp);
+ if (!ret && !fsp.found)
+ cu_walk_functions_at(&pf->cu_die, pf->addr,
+ find_inner_scope_cb, &fsp);
return fsp.found ? die_mem : NULL;
}
@@ -936,7 +945,7 @@ static int probe_point_inline_cb(Dwarf_Die *in_die, void *data)
ret = find_probe_point_lazy(in_die, pf);
else {
/* Get probe address */
- if (dwarf_entrypc(in_die, &addr) != 0) {
+ if (die_entrypc(in_die, &addr) != 0) {
pr_warning("Failed to get entry address of %s.\n",
dwarf_diename(in_die));
return -ENOENT;
@@ -988,7 +997,7 @@ static int probe_point_search_cb(Dwarf_Die *sp_die, void *data)
param->retval = find_probe_point_by_line(pf);
} else if (die_is_func_instance(sp_die)) {
/* Instances always have the entry address */
- dwarf_entrypc(sp_die, &pf->addr);
+ die_entrypc(sp_die, &pf->addr);
/* But in some case the entry address is 0 */
if (pf->addr == 0) {
pr_debug("%s has no entry PC. Skipped\n",
@@ -1400,6 +1409,18 @@ error:
return DIE_FIND_CB_END;
}
+static bool available_var_finder_overlap(struct available_var_finder *af)
+{
+ int i;
+
+ for (i = 0; i < af->nvls; i++) {
+ if (af->pf.addr == af->vls[i].point.address)
+ return true;
+ }
+ return false;
+
+}
+
/* Add a found vars into available variables list */
static int add_available_vars(Dwarf_Die *sc_die, struct probe_finder *pf)
{
@@ -1410,6 +1431,14 @@ static int add_available_vars(Dwarf_Die *sc_die, struct probe_finder *pf)
Dwarf_Die die_mem;
int ret;
+ /*
+ * For some reason (e.g. different column assigned to same address),
+ * this callback can be called with the address which already passed.
+ * Ignore it first.
+ */
+ if (available_var_finder_overlap(af))
+ return 0;
+
/* Check number of tevs */
if (af->nvls == af->max_vls) {
pr_warning("Too many( > %d) probe point found.\n", af->max_vls);
@@ -1553,7 +1582,7 @@ int debuginfo__find_probe_point(struct debuginfo *dbg, unsigned long addr,
/* Get function entry information */
func = basefunc = dwarf_diename(&spdie);
if (!func ||
- dwarf_entrypc(&spdie, &baseaddr) != 0 ||
+ die_entrypc(&spdie, &baseaddr) != 0 ||
dwarf_decl_line(&spdie, &baseline) != 0) {
lineno = 0;
goto post;
@@ -1570,7 +1599,7 @@ int debuginfo__find_probe_point(struct debuginfo *dbg, unsigned long addr,
while (die_find_top_inlinefunc(&spdie, (Dwarf_Addr)addr,
&indie)) {
/* There is an inline function */
- if (dwarf_entrypc(&indie, &_addr) == 0 &&
+ if (die_entrypc(&indie, &_addr) == 0 &&
_addr == addr) {
/*
* addr is at an inline function entry.