From 4c1d8f0547363893bc3b7755aa90755bfd89e2ed Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Mon, 11 Nov 2024 12:17:32 -0300 Subject: [PATCH] perf disasm: Introduce symbol__disassemble_objdump() With the first disassemble method in perf, the parsing of objdump output, just like we have for llvm and capstone. This paves the way to allow the user to specify what disassemblers are preferred and to also to at some point allow building without the objdump method. Acked-by: Ian Rogers Cc: Adrian Hunter Cc: Athira Rajeev Cc: Jiri Olsa Cc: Kan Liang Cc: Namhyung Kim Cc: Steinar H. Gunderson Link: https://lore.kernel.org/r/20241111151734.1018476-2-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/disasm.c | 168 ++++++++++++++++++++------------------- 1 file changed, 88 insertions(+), 80 deletions(-) diff --git a/tools/perf/util/disasm.c b/tools/perf/util/disasm.c index a525b80b934f..36cf61602c17 100644 --- a/tools/perf/util/disasm.c +++ b/tools/perf/util/disasm.c @@ -2045,17 +2045,14 @@ static char *expand_tabs(char *line, char **storage, size_t *storage_len) return new_line; } -int symbol__disassemble(struct symbol *sym, struct annotate_args *args) +static int symbol__disassemble_objdump(const char *filename, struct symbol *sym, + struct annotate_args *args) { struct annotation_options *opts = &annotate_opts; struct map *map = args->ms.map; struct dso *dso = map__dso(map); char *command; FILE *file; - char symfs_filename[PATH_MAX]; - struct kcore_extract kce; - bool delete_extract = false; - bool decomp = false; int lineno = 0; char *fileloc = NULL; int nline; @@ -2070,77 +2067,7 @@ int symbol__disassemble(struct symbol *sym, struct annotate_args *args) NULL, }; struct child_process objdump_process; - int err = dso__disassemble_filename(dso, symfs_filename, sizeof(symfs_filename)); - - if (err) - return err; - - pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__, - symfs_filename, sym->name, map__unmap_ip(map, sym->start), - map__unmap_ip(map, sym->end)); - - pr_debug("annotating [%p] %30s : [%p] %30s\n", - dso, dso__long_name(dso), sym, sym->name); - - if (dso__binary_type(dso) == DSO_BINARY_TYPE__BPF_PROG_INFO) { - return symbol__disassemble_bpf(sym, args); - } else if (dso__binary_type(dso) == DSO_BINARY_TYPE__BPF_IMAGE) { - return symbol__disassemble_bpf_image(sym, args); - } else if (dso__binary_type(dso) == DSO_BINARY_TYPE__NOT_FOUND) { - return -1; - } else if (dso__is_kcore(dso)) { - kce.kcore_filename = symfs_filename; - kce.addr = map__rip_2objdump(map, sym->start); - kce.offs = sym->start; - kce.len = sym->end - sym->start; - if (!kcore_extract__create(&kce)) { - delete_extract = true; - strlcpy(symfs_filename, kce.extract_filename, - sizeof(symfs_filename)); - } - } else if (dso__needs_decompress(dso)) { - char tmp[KMOD_DECOMP_LEN]; - - if (dso__decompress_kmodule_path(dso, symfs_filename, - tmp, sizeof(tmp)) < 0) - return -1; - - decomp = true; - strcpy(symfs_filename, tmp); - } - - /* - * For powerpc data type profiling, use the dso__data_read_offset - * to read raw instruction directly and interpret the binary code - * to understand instructions and register fields. For sort keys as - * type and typeoff, disassemble to mnemonic notation is - * not required in case of powerpc. - */ - if (arch__is(args->arch, "powerpc")) { - extern const char *sort_order; - - if (sort_order && !strstr(sort_order, "sym")) { - err = symbol__disassemble_raw(symfs_filename, sym, args); - if (err == 0) - goto out_remove_tmp; -#ifdef HAVE_LIBCAPSTONE_SUPPORT - err = symbol__disassemble_capstone_powerpc(symfs_filename, sym, args); - if (err == 0) - goto out_remove_tmp; -#endif - } - } - -#ifdef HAVE_LIBLLVM_SUPPORT - err = symbol__disassemble_llvm(symfs_filename, sym, args); - if (err == 0) - goto out_remove_tmp; -#endif -#ifdef HAVE_LIBCAPSTONE_SUPPORT - err = symbol__disassemble_capstone(symfs_filename, sym, args); - if (err == 0) - goto out_remove_tmp; -#endif + int err; err = asprintf(&command, "%s %s%s --start-address=0x%016" PRIx64 @@ -2163,13 +2090,13 @@ int symbol__disassemble(struct symbol *sym, struct annotate_args *args) if (err < 0) { pr_err("Failure allocating memory for the command to run\n"); - goto out_remove_tmp; + return err; } pr_debug("Executing: %s\n", command); objdump_argv[2] = command; - objdump_argv[4] = symfs_filename; + objdump_argv[4] = filename; /* Create a pipe to read from for stdout */ memset(&objdump_process, 0, sizeof(objdump_process)); @@ -2207,8 +2134,8 @@ int symbol__disassemble(struct symbol *sym, struct annotate_args *args) break; /* Skip lines containing "filename:" */ - match = strstr(line, symfs_filename); - if (match && match[strlen(symfs_filename)] == ':') + match = strstr(line, filename); + if (match && match[strlen(filename)] == ':') continue; expanded_line = strim(line); @@ -2253,6 +2180,87 @@ int symbol__disassemble(struct symbol *sym, struct annotate_args *args) out_free_command: free(command); + return err; +} + +int symbol__disassemble(struct symbol *sym, struct annotate_args *args) +{ + struct map *map = args->ms.map; + struct dso *dso = map__dso(map); + char symfs_filename[PATH_MAX]; + bool delete_extract = false; + struct kcore_extract kce; + bool decomp = false; + int err = dso__disassemble_filename(dso, symfs_filename, sizeof(symfs_filename)); + + if (err) + return err; + + pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__, + symfs_filename, sym->name, map__unmap_ip(map, sym->start), + map__unmap_ip(map, sym->end)); + + pr_debug("annotating [%p] %30s : [%p] %30s\n", dso, dso__long_name(dso), sym, sym->name); + + if (dso__binary_type(dso) == DSO_BINARY_TYPE__BPF_PROG_INFO) { + return symbol__disassemble_bpf(sym, args); + } else if (dso__binary_type(dso) == DSO_BINARY_TYPE__BPF_IMAGE) { + return symbol__disassemble_bpf_image(sym, args); + } else if (dso__binary_type(dso) == DSO_BINARY_TYPE__NOT_FOUND) { + return -1; + } else if (dso__is_kcore(dso)) { + kce.addr = map__rip_2objdump(map, sym->start); + kce.kcore_filename = symfs_filename; + kce.len = sym->end - sym->start; + kce.offs = sym->start; + + if (!kcore_extract__create(&kce)) { + delete_extract = true; + strlcpy(symfs_filename, kce.extract_filename, sizeof(symfs_filename)); + } + } else if (dso__needs_decompress(dso)) { + char tmp[KMOD_DECOMP_LEN]; + + if (dso__decompress_kmodule_path(dso, symfs_filename, tmp, sizeof(tmp)) < 0) + return -1; + + decomp = true; + strcpy(symfs_filename, tmp); + } + + /* + * For powerpc data type profiling, use the dso__data_read_offset to + * read raw instruction directly and interpret the binary code to + * understand instructions and register fields. For sort keys as type + * and typeoff, disassemble to mnemonic notation is not required in + * case of powerpc. + */ + if (arch__is(args->arch, "powerpc")) { + extern const char *sort_order; + + if (sort_order && !strstr(sort_order, "sym")) { + err = symbol__disassemble_raw(symfs_filename, sym, args); + if (err == 0) + goto out_remove_tmp; +#ifdef HAVE_LIBCAPSTONE_SUPPORT + err = symbol__disassemble_capstone_powerpc(symfs_filename, sym, args); + if (err == 0) + goto out_remove_tmp; +#endif + } + } + +#ifdef HAVE_LIBLLVM_SUPPORT + err = symbol__disassemble_llvm(symfs_filename, sym, args); + if (err == 0) + goto out_remove_tmp; +#endif +#ifdef HAVE_LIBCAPSTONE_SUPPORT + err = symbol__disassemble_capstone(symfs_filename, sym, args); + if (err == 0) + goto out_remove_tmp; +#endif + err = symbol__disassemble_objdump(symfs_filename, sym, args); out_remove_tmp: if (decomp)