From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f202.google.com (mail-pg1-f202.google.com [209.85.215.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 14CFE35F170 for ; Fri, 10 Jul 2026 02:50:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783651823; cv=none; b=akhH7lFopGlEWp3srCxXTqCCyXADde6lrW1ZE96KlBl9/+Deq0YrmSBsR51CPfYY5x35sZDXFlX+HwUuZ5dE5AyhU4oRCDSs7lh7OECx2FTRpmhlhhypLlAK/9nPbXffWngpNLbgFzuFczrt3AuLNC3eUl2TTiBtHEi+/JXjrIk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783651823; c=relaxed/simple; bh=FaXoyj3CsPDRnu6tCLt/5YLGi9CO1ERVxtPJEECvcVQ=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=JcCw2P05wDW5Nsvbs2uZA24WSljf4UhgoT86/eWS5N80AM8IP3GEJ6hUGD2aPb3zJU53XxA3ZUOKTk/8fuzQzihMlc10sd14kejFYB6N9U9qc6z8AvNxqHN1eFyvnx4pS+c0JrUCMs61QMBu6KvuXFXqm/fXTGQ9UQr92ipYWLw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=vRzaZLJZ; arc=none smtp.client-ip=209.85.215.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="vRzaZLJZ" Received: by mail-pg1-f202.google.com with SMTP id 41be03b00d2f7-c96b4f58ddcso539401a12.3 for ; Thu, 09 Jul 2026 19:50:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1783651817; x=1784256617; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:from:to:cc:subject:date:message-id:reply-to :content-type; bh=sTgvuS32veVYipNeVaKM375K0LMaG1BN9qZc3iIrX3Y=; b=vRzaZLJZfdY0j8NlOPc3ZWuyoeJAQtcux8ICrn8Mq2YlyyJiJg+9ivLjVHZW1JeArC RhEakgtCjQXM58fn20OOy9/3Sx2F8tZcWlfkwcpSiNENHkGRDIQV3ltJeDiKiC/lvFzG 6ILZZ2nAxlpaRUc2V3mXS4HPnCg9C35T1T+PoyIeUvmKyPI2VTVSnfVNtVcLYa/HUsF6 Hhx71CGjLn2HSpQ2n2e6P+32C5x/RH7eqFT77+9gdQyg+MChwr7yryY7rtcHD4zbg5mK 2EWIUWp2/LZyBGJFQJ7lHDkjivZHWddSeI464G6c3alx/W15rizhYihdGHd0r66DUXzT 2xTg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783651817; x=1784256617; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=sTgvuS32veVYipNeVaKM375K0LMaG1BN9qZc3iIrX3Y=; b=hL46Lvd+H2sh9Ve2jzhq9n/J5Bj0Xwp7ho4pXWuC0viiKO9GH+4f3x3mIjwxqgA3lh tzIwKcAodqEsHM4OyigDIHlox2x4Q9iXc7vsZagrRK/rl/OMIeQ0P3yACiDHdPWtjaL8 z53GVMVmFce3aibZZhlVr76b4nascPizEdjOK0LaMZ6Xi40DAJ2zAd9LFBTaCvLaZFhu VAXD60WUtcWkD0LRpxEDaPwOmE3B1nbq5j2SZadpQU3F7/t8V9RVCsASPtCxHVeJRItt sAWW02ylAsib5RdRCeTnBP78B+LgsdswH9zoLa0Ho4oTc19opF3CDM9uhIy2jrELAkBl GShw== X-Forwarded-Encrypted: i=1; AHgh+RqTPyA9uJZcxfbXFk2qT+8z0HFo4++kcEISzrbcpihlXJqKpMN5L+cmr1hI/bVkLehxd+/5JADYaaB/nSsYSLHx@vger.kernel.org X-Gm-Message-State: AOJu0YzdnTf1C4UQzKimg46BtGsp7D5BoPKuReWnaFEMtmLvNvzW9BsT PgDTxWP/98tD/ZwlNQTbA6N/foQ4ly8NcvGqWWqw7Z5iLhJN8SSbAuQ9ETYHUshhlfmTcLdJu4I vkCc9aTtZRQ== X-Received: from dlbqd12.prod.google.com ([2002:a05:7023:b0c:b0:13a:4c0:f1f]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a21:6f11:b0:3bf:6c07:b2f0 with SMTP id adf61e73a8af0-3c0bd1e79e7mr10040325637.51.1783651817092; Thu, 09 Jul 2026 19:50:17 -0700 (PDT) Date: Thu, 9 Jul 2026 19:49:52 -0700 In-Reply-To: <20260710024952.1668911-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260709165220.1411149-1-irogers@google.com> <20260710024952.1668911-1-irogers@google.com> X-Mailer: git-send-email 2.55.0.795.g602f6c329a-goog Message-ID: <20260710024952.1668911-9-irogers@google.com> Subject: [PATCH v4 9/9] perf annotate: Be robust to annotating without a thread From: Ian Rogers To: irogers@google.com, acme@kernel.org, jistone@redhat.com, namhyung@kernel.org Cc: adrian.hunter@intel.com, dapeng1.mi@linux.intel.com, james.clark@linaro.org, jolsa@kernel.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, tianyou.li@intel.com Content-Type: text/plain; charset="UTF-8" If a thread isn't given to thread__get_arch try harder to determine the arch for disassembly. Do this by passing an entire map_symbol and using fallback paths such as reading the e_machine from a map's dso. At the same time ensure some other uses of map_symbol thread don't assume it is non-NULL to avoid segvs. Tested running perf report without a previous fix to populate the map_symbol thread field. Assisted-by: Antigravity:gemini-3.5-flash Signed-off-by: Ian Rogers --- tools/perf/ui/browsers/annotate.c | 2 +- .../util/annotate-arch/annotate-loongarch.c | 4 +- tools/perf/util/annotate-arch/annotate-s390.c | 2 +- tools/perf/util/annotate.c | 57 ++++++++++++++----- tools/perf/util/annotate.h | 2 +- tools/perf/util/capstone.c | 30 ++++++++-- tools/perf/util/disasm.c | 7 ++- 7 files changed, 77 insertions(+), 27 deletions(-) diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c index d25761a8d25e..e47a46775089 100644 --- a/tools/perf/ui/browsers/annotate.c +++ b/tools/perf/ui/browsers/annotate.c @@ -1201,7 +1201,7 @@ int __hist_entry__tui_annotate(struct hist_entry *he, struct map_symbol *ms, ui__warning("Annotation has no source code."); } } else { - err = thread__get_arch(ms->thread, &browser.arch); + err = map_symbol__get_arch(ms, &browser.arch); if (err) { annotate_browser__symbol_annotate_error(&browser, err); return -1; diff --git a/tools/perf/util/annotate-arch/annotate-loongarch.c b/tools/perf/util/annotate-arch/annotate-loongarch.c index c2addca77320..26217cb2d8f3 100644 --- a/tools/perf/util/annotate-arch/annotate-loongarch.c +++ b/tools/perf/util/annotate-arch/annotate-loongarch.c @@ -51,7 +51,7 @@ static int loongarch_call__parse(const struct arch *arch, struct ins_operands *o .addr = map__objdump_2mem(map, ops->target.addr), }; - if (maps__find_ams(thread__maps(ms->thread), &target) == 0 && + if (ms->thread && maps__find_ams(thread__maps(ms->thread), &target) == 0 && map__rip_2objdump(target.ms.map, map__map_ip(target.ms.map, target.addr)) == ops->target.addr) ops->target.sym = target.ms.sym; @@ -95,7 +95,7 @@ static int loongarch_jump__parse(const struct arch *arch, struct ins_operands *o ops->target.outside = target.addr < start || target.addr >= end; - if (maps__find_ams(thread__maps(ms->thread), &target) == 0 && + if (ms->thread && maps__find_ams(thread__maps(ms->thread), &target) == 0 && map__rip_2objdump(target.ms.map, map__map_ip(target.ms.map, target.addr)) == ops->target.addr) ops->target.sym = target.ms.sym; diff --git a/tools/perf/util/annotate-arch/annotate-s390.c b/tools/perf/util/annotate-arch/annotate-s390.c index af9cabd0a586..3ea6ad588998 100644 --- a/tools/perf/util/annotate-arch/annotate-s390.c +++ b/tools/perf/util/annotate-arch/annotate-s390.c @@ -50,7 +50,7 @@ static int s390_call__parse(const struct arch *arch, struct ins_operands *ops, .addr = map__objdump_2mem(map, ops->target.addr), }; - if (maps__find_ams(thread__maps(ms->thread), &target) == 0 && + if (ms->thread && maps__find_ams(thread__maps(ms->thread), &target) == 0 && map__rip_2objdump(target.ms.map, map__map_ip(target.ms.map, target.addr)) == ops->target.addr) ops->target.sym = target.ms.sym; diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c index 53b2a224b21d..cdfaeb2388d0 100644 --- a/tools/perf/util/annotate.c +++ b/tools/perf/util/annotate.c @@ -982,21 +982,46 @@ void symbol__calc_percent(struct symbol *sym, struct evsel *evsel) annotation__calc_percent(notes, evsel, symbol__size(sym)); } -int thread__get_arch(struct thread *thread, const struct arch **parch) +int map_symbol__get_arch(struct map_symbol *ms, const struct arch **parch) { + struct machine *machine = NULL; + const char *cpuid = NULL; const struct arch *arch; - struct machine *machine; - uint32_t e_flags; - uint16_t e_machine; + uint32_t e_flags = 0; + uint16_t e_machine = EM_NONE; - if (!thread) { - *parch = NULL; - return -1; + /* + * If we have a thread then derive the e_machine using it. The thread + * can determine the machine and perf_env, so is generally pretty robust + * as well as benefitting from a cache. + */ + if (ms->thread) { + struct maps *maps = thread__maps(ms->thread); + + machine = maps__machine(maps); + e_machine = thread__e_machine(ms->thread, machine, &e_flags); + if (machine && machine->env) + cpuid = machine->env->cpuid; + } + if (e_machine == EM_NONE && ms->map) { + /* + * If the thread look up failed then try to use a dso that may + * be associated with the map. + */ + struct dso *dso = map__dso(ms->map); + + if (dso) + e_machine = dso__e_machine(dso, machine, &e_flags); + } + if (e_machine == EM_NONE) { + /* + * Still no e_machine, use the default for this kind of perf + * build that will determine a value using uname, etc. + */ + e_machine = thread__e_machine(ms->thread, machine, &e_flags); } - machine = maps__machine(thread__maps(thread)); - e_machine = thread__e_machine(thread, machine, &e_flags); - arch = arch__find(e_machine, e_flags, machine->env ? machine->env->cpuid : NULL); + arch = arch__find(e_machine, e_flags, cpuid); if (arch == NULL) { pr_err("%s: unsupported arch %d\n", __func__, e_machine); return errno; @@ -1018,7 +1043,7 @@ int symbol__annotate(struct map_symbol *ms, struct evsel *evsel, const struct arch *arch = NULL; int err, nr; - err = thread__get_arch(ms->thread, &arch); + err = map_symbol__get_arch(ms, &arch); if (err) return err; @@ -1266,7 +1291,10 @@ int hist_entry__annotate_printf(struct hist_entry *he, struct evsel *evsel) apd.addr_fmt_width = annotated_source__addr_fmt_width(¬es->src->source, notes->src->start); - thread__get_arch(ms->thread, &apd.arch); + if (map_symbol__get_arch(ms, &apd.arch)) { + free(filename); + return -ENOTSUP; + } apd.dbg = dso__debuginfo(dso); list_for_each_entry(pos, ¬es->src->source, node) { @@ -1369,9 +1397,12 @@ static int symbol__annotate_fprintf2(struct symbol *sym, FILE *fp, .write_graph = FILE__write_graph, }; struct annotation_line *al; + int err; if (annotate_opts.code_with_type) { - thread__get_arch(apd->he->ms.thread, &apd->arch); + err = map_symbol__get_arch(&apd->he->ms, &apd->arch); + if (err) + return err; apd->dbg = dso__debuginfo(map__dso(apd->he->ms.map)); } diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h index 1aa6df7d1618..d54f851035ec 100644 --- a/tools/perf/util/annotate.h +++ b/tools/perf/util/annotate.h @@ -584,5 +584,5 @@ int annotation_br_cntr_entry(char **str, int br_cntr_nr, u64 *br_cntr, int num_aggr, struct evsel *evsel); int annotation_br_cntr_abbr_list(char **str, struct evsel *evsel, bool header); -int thread__get_arch(struct thread *thread, const struct arch **parch); +int map_symbol__get_arch(struct map_symbol *ms, const struct arch **parch); #endif /* __PERF_ANNOTATE_H */ diff --git a/tools/perf/util/capstone.c b/tools/perf/util/capstone.c index 5ad537fea436..15152a2c1b25 100644 --- a/tools/perf/util/capstone.c +++ b/tools/perf/util/capstone.c @@ -411,9 +411,18 @@ int symbol__disassemble_capstone(const char *filename, struct symbol *sym, !strcmp(args->options->disassembler_style, "att")) disassembler_style = true; - e_machine = thread__e_machine_endian(args->ms->thread, - /*machine=*/NULL, - /*e_flags=*/NULL, &is_big_endian); + if (args->ms->thread) { + e_machine = thread__e_machine_endian(args->ms->thread, + /*machine=*/NULL, + /*e_flags=*/NULL, &is_big_endian); + } else if (dso) { + e_machine = dso__e_machine_endian(dso, /*machine=*/NULL, /*e_flags=*/NULL, + &is_big_endian); + } else { + e_machine = thread__e_machine_endian(NULL, + /*machine=*/NULL, + /*e_flags=*/NULL, &is_big_endian); + } if (capstone_init(e_machine, &handle, is_64bit, is_big_endian, disassembler_style) < 0) goto err; @@ -526,9 +535,18 @@ int symbol__disassemble_capstone_powerpc(const char *filename __maybe_unused, !strcmp(args->options->disassembler_style, "att")) disassembler_style = true; - e_machine = thread__e_machine_endian(args->ms->thread, - /*machine=*/NULL, - /*e_flags=*/NULL, &is_big_endian); + if (args->ms->thread) { + e_machine = thread__e_machine_endian(args->ms->thread, + /*machine=*/NULL, + /*e_flags=*/NULL, &is_big_endian); + } else if (dso) { + e_machine = dso__e_machine_endian(dso, /*machine=*/NULL, /*e_flags=*/NULL, + &is_big_endian); + } else { + e_machine = thread__e_machine_endian(NULL, + /*machine=*/NULL, + /*e_flags=*/NULL, &is_big_endian); + } if (capstone_init(e_machine, &handle, is_64bit, is_big_endian, disassembler_style) < 0) goto err; diff --git a/tools/perf/util/disasm.c b/tools/perf/util/disasm.c index 5b114f089d56..46b9c292d5eb 100644 --- a/tools/perf/util/disasm.c +++ b/tools/perf/util/disasm.c @@ -271,7 +271,7 @@ static int call__parse(const struct arch *arch, struct ins_operands *ops, struct .addr = map__objdump_2mem(map, ops->target.addr), }; - if (maps__find_ams(thread__maps(ms->thread), &target) == 0 && + if (ms->thread && maps__find_ams(thread__maps(ms->thread), &target) == 0 && map__rip_2objdump(target.ms.map, map__map_ip(target.ms.map, target.addr)) == ops->target.addr) ops->target.sym = target.ms.sym; @@ -405,7 +405,7 @@ static int jump__parse(const struct arch *arch, struct ins_operands *ops, struct * Actual navigation will come next, with further understanding of how * the symbol searching and disassembly should be done. */ - if (maps__find_ams(thread__maps(ms->thread), &target) == 0 && + if (ms->thread && maps__find_ams(thread__maps(ms->thread), &target) == 0 && map__rip_2objdump(target.ms.map, map__map_ip(target.ms.map, target.addr)) == ops->target.addr) ops->target.sym = target.ms.sym; @@ -1068,7 +1068,8 @@ static int symbol__parse_objdump_line(struct symbol *sym, .ms = { .map = map__get(map), }, }; - if (!maps__find_ams(thread__maps(args->ms->thread), &target) && + if (args->ms->thread && + !maps__find_ams(thread__maps(args->ms->thread), &target) && target.ms.sym->start == target.al_addr) dl->ops.target.sym = target.ms.sym; -- 2.55.0.795.g602f6c329a-goog