perf machine: Remove machine->symbol_filter and friends

[cascardo/linux.git] / tools / perf / util / probe-finder.c

diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 508b61c..8daca4f 100644 (file)
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -907,6 +907,38 @@ static int find_probe_point_lazy(Dwarf_Die *sp_die, struct probe_finder *pf)
        return die_walk_lines(sp_die, probe_point_lazy_walker, pf);
 }
 
+static void skip_prologue(Dwarf_Die *sp_die, struct probe_finder *pf)
+{
+       struct perf_probe_point *pp = &pf->pev->point;
+
+       /* Not uprobe? */
+       if (!pf->pev->uprobes)
+               return;
+
+       /* Compiled with optimization? */
+       if (die_is_optimized_target(&pf->cu_die))
+               return;
+
+       /* Don't know entrypc? */
+       if (!pf->addr)
+               return;
+
+       /* Only FUNC and FUNC@SRC are eligible. */
+       if (!pp->function || pp->line || pp->retprobe || pp->lazy_line ||
+           pp->offset || pp->abs_address)
+               return;
+
+       /* Not interested in func parameter? */
+       if (!perf_probe_with_var(pf->pev))
+               return;
+
+       pr_info("Target program is compiled without optimization. Skipping prologue.\n"
+               "Probe on address 0x%" PRIx64 " to force probing at the function entry.\n\n",
+               pf->addr);
+
+       die_skip_prologue(sp_die, &pf->cu_die, &pf->addr);
+}
+
 static int probe_point_inline_cb(Dwarf_Die *in_die, void *data)
 {
        struct probe_finder *pf = data;
@@ -969,6 +1001,7 @@ static int probe_point_search_cb(Dwarf_Die *sp_die, void *data)
                if (pp->lazy_line)
                        param->retval = find_probe_point_lazy(sp_die, pf);
                else {
+                       skip_prologue(sp_die, pf);
                        pf->addr += pp->offset;
                        /* TODO: Check the address in this function */
                        param->retval = call_probe_finder(sp_die, pf);