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linux-next/tools/perf/util/symbol_fprintf.c
Davidlohr Bueso 7137ff50b6 perf symbols: Use cached rbtrees
At the cost of an extra pointer, we can avoid the O(logN) cost of
finding the first element in the tree (smallest node).

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20181206191819.30182-6-dave@stgolabs.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-01-25 15:12:10 +01:00

75 lines
1.8 KiB
C

// SPDX-License-Identifier: GPL-2.0
#include <elf.h>
#include <inttypes.h>
#include <stdio.h>
#include "map.h"
#include "symbol.h"
size_t symbol__fprintf(struct symbol *sym, FILE *fp)
{
return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %c %s\n",
sym->start, sym->end,
sym->binding == STB_GLOBAL ? 'g' :
sym->binding == STB_LOCAL ? 'l' : 'w',
sym->name);
}
size_t __symbol__fprintf_symname_offs(const struct symbol *sym,
const struct addr_location *al,
bool unknown_as_addr,
bool print_offsets, FILE *fp)
{
unsigned long offset;
size_t length;
if (sym) {
length = fprintf(fp, "%s", sym->name);
if (al && print_offsets) {
if (al->addr < sym->end)
offset = al->addr - sym->start;
else
offset = al->addr - al->map->start - sym->start;
length += fprintf(fp, "+0x%lx", offset);
}
return length;
} else if (al && unknown_as_addr)
return fprintf(fp, "[%#" PRIx64 "]", al->addr);
else
return fprintf(fp, "[unknown]");
}
size_t symbol__fprintf_symname_offs(const struct symbol *sym,
const struct addr_location *al,
FILE *fp)
{
return __symbol__fprintf_symname_offs(sym, al, false, true, fp);
}
size_t __symbol__fprintf_symname(const struct symbol *sym,
const struct addr_location *al,
bool unknown_as_addr, FILE *fp)
{
return __symbol__fprintf_symname_offs(sym, al, unknown_as_addr, false, fp);
}
size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp)
{
return __symbol__fprintf_symname_offs(sym, NULL, false, false, fp);
}
size_t dso__fprintf_symbols_by_name(struct dso *dso,
FILE *fp)
{
size_t ret = 0;
struct rb_node *nd;
struct symbol_name_rb_node *pos;
for (nd = rb_first_cached(&dso->symbol_names); nd; nd = rb_next(nd)) {
pos = rb_entry(nd, struct symbol_name_rb_node, rb_node);
fprintf(fp, "%s\n", pos->sym.name);
}
return ret;
}