From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 54338C07E96 for ; Thu, 15 Jul 2021 06:36:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3D3BF61358 for ; Thu, 15 Jul 2021 06:36:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234475AbhGOGjU (ORCPT ); Thu, 15 Jul 2021 02:39:20 -0400 Received: from szxga03-in.huawei.com ([45.249.212.189]:11311 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231149AbhGOGjU (ORCPT ); Thu, 15 Jul 2021 02:39:20 -0400 Received: from dggemv704-chm.china.huawei.com (unknown [172.30.72.56]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4GQPfZ33wDz7tch; Thu, 15 Jul 2021 14:31:50 +0800 (CST) Received: from dggpemm000003.china.huawei.com (7.185.36.128) by dggemv704-chm.china.huawei.com (10.3.19.47) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Thu, 15 Jul 2021 14:36:13 +0800 Received: from ubuntu1804.huawei.com (10.67.174.61) by dggpemm000003.china.huawei.com (7.185.36.128) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Thu, 15 Jul 2021 14:36:12 +0800 From: Yang Jihong To: , , , , , , , , , , , , , , , , CC: Subject: [PATCH v2] perf probe: Fix add event failed when 32-bit perf running in 64-bit kernel Date: Thu, 15 Jul 2021 14:37:23 +0800 Message-ID: <20210715063723.11926-1-yangjihong1@huawei.com> X-Mailer: git-send-email 2.30.GIT MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.67.174.61] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To dggpemm000003.china.huawei.com (7.185.36.128) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-perf-users@vger.kernel.org The "address" member of "struct probe_trace_point" uses long data type. If kernel is 64-bit and perf program is 32-bit, size of "address" variable is 32 bits. As a result, upper 32 bits of address read from kernel are truncated, An error occurs during address comparison in kprobe_warn_out_range function. Before: # perf probe -a schedule schedule is out of .text, skip it. Error: Failed to add events. Solution: Change data type of "address" variable to u64 and change corresponding address printing and value assignment. After: # perf.new.new probe -a schedule Added new event: probe:schedule (on schedule) You can now use it in all perf tools, such as: perf record -e probe:schedule -aR sleep 1 # perf probe -l probe:schedule (on schedule@kernel/sched/core.c) # perf record -e probe:schedule -aR sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.156 MB perf.data (1366 samples) ] # perf report --stdio # To display the perf.data header info, please use --header/--header-only options. # # # Total Lost Samples: 0 # # Samples: 1K of event 'probe:schedule' # Event count (approx.): 1366 # # Overhead Command Shared Object Symbol # ........ ............... ................. ............ # 6.22% migration/0 [kernel.kallsyms] [k] schedule 6.22% migration/1 [kernel.kallsyms] [k] schedule 6.22% migration/2 [kernel.kallsyms] [k] schedule 6.22% migration/3 [kernel.kallsyms] [k] schedule 6.15% migration/10 [kernel.kallsyms] [k] schedule 6.15% migration/11 [kernel.kallsyms] [k] schedule 6.15% migration/12 [kernel.kallsyms] [k] schedule 6.15% migration/13 [kernel.kallsyms] [k] schedule 6.15% migration/14 [kernel.kallsyms] [k] schedule 6.15% migration/15 [kernel.kallsyms] [k] schedule 6.15% migration/4 [kernel.kallsyms] [k] schedule 6.15% migration/5 [kernel.kallsyms] [k] schedule 6.15% migration/6 [kernel.kallsyms] [k] schedule 6.15% migration/7 [kernel.kallsyms] [k] schedule 6.15% migration/8 [kernel.kallsyms] [k] schedule 6.15% migration/9 [kernel.kallsyms] [k] schedule 0.22% rcu_sched [kernel.kallsyms] [k] schedule ... # # (Cannot load tips.txt file, please install perf!) # Signed-off-by: Yang Jihong --- Changes since v1: - Change the data type of "addr" parameter of the cu_find_lineinfo and line_range_walk_cb functions to Dwarf_Addr. - Update commit msg, perf probe -l shows then filename and line number. tools/perf/util/dwarf-aux.c | 8 +++--- tools/perf/util/dwarf-aux.h | 2 +- tools/perf/util/probe-event.c | 49 ++++++++++++++++------------------ tools/perf/util/probe-event.h | 4 +-- tools/perf/util/probe-finder.c | 15 +++++------ tools/perf/util/probe-finder.h | 2 +- 6 files changed, 38 insertions(+), 42 deletions(-) diff --git a/tools/perf/util/dwarf-aux.c b/tools/perf/util/dwarf-aux.c index 7d2ba8419b0c..609ca1671501 100644 --- a/tools/perf/util/dwarf-aux.c +++ b/tools/perf/util/dwarf-aux.c @@ -113,14 +113,14 @@ static Dwarf_Line *cu_getsrc_die(Dwarf_Die *cu_die, Dwarf_Addr addr) * * Find a line number and file name for @addr in @cu_die. */ -int cu_find_lineinfo(Dwarf_Die *cu_die, unsigned long addr, - const char **fname, int *lineno) +int cu_find_lineinfo(Dwarf_Die *cu_die, Dwarf_Addr addr, + const char **fname, int *lineno) { Dwarf_Line *line; Dwarf_Die die_mem; Dwarf_Addr faddr; - if (die_find_realfunc(cu_die, (Dwarf_Addr)addr, &die_mem) + if (die_find_realfunc(cu_die, addr, &die_mem) && die_entrypc(&die_mem, &faddr) == 0 && faddr == addr) { *fname = dwarf_decl_file(&die_mem); @@ -128,7 +128,7 @@ int cu_find_lineinfo(Dwarf_Die *cu_die, unsigned long addr, goto out; } - line = cu_getsrc_die(cu_die, (Dwarf_Addr)addr); + line = cu_getsrc_die(cu_die, addr); if (line && dwarf_lineno(line, lineno) == 0) { *fname = dwarf_linesrc(line, NULL, NULL); if (!*fname) diff --git a/tools/perf/util/dwarf-aux.h b/tools/perf/util/dwarf-aux.h index cb99646843a9..7ee0fa19b5c4 100644 --- a/tools/perf/util/dwarf-aux.h +++ b/tools/perf/util/dwarf-aux.h @@ -19,7 +19,7 @@ const char *cu_find_realpath(Dwarf_Die *cu_die, const char *fname); const char *cu_get_comp_dir(Dwarf_Die *cu_die); /* Get a line number and file name for given address */ -int cu_find_lineinfo(Dwarf_Die *cudie, unsigned long addr, +int cu_find_lineinfo(Dwarf_Die *cudie, Dwarf_Addr addr, const char **fname, int *lineno); /* Walk on functions at given address */ diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index c14e1d228e56..691b7a0988c6 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -237,8 +237,8 @@ static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs) clear_probe_trace_event(tevs + i); } -static bool kprobe_blacklist__listed(unsigned long address); -static bool kprobe_warn_out_range(const char *symbol, unsigned long address) +static bool kprobe_blacklist__listed(u64 address); +static bool kprobe_warn_out_range(const char *symbol, u64 address) { struct map *map; bool ret = false; @@ -398,8 +398,7 @@ static int find_alternative_probe_point(struct debuginfo *dinfo, pr_debug("Symbol %s address found : %" PRIx64 "\n", pp->function, address); - ret = debuginfo__find_probe_point(dinfo, (unsigned long)address, - result); + ret = debuginfo__find_probe_point(dinfo, address, result); if (ret <= 0) ret = (!ret) ? -ENOENT : ret; else { @@ -587,7 +586,7 @@ static void debuginfo_cache__exit(void) } -static int get_text_start_address(const char *exec, unsigned long *address, +static int get_text_start_address(const char *exec, u64 *address, struct nsinfo *nsi) { Elf *elf; @@ -632,7 +631,7 @@ static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp, bool is_kprobe) { struct debuginfo *dinfo = NULL; - unsigned long stext = 0; + u64 stext = 0; u64 addr = tp->address; int ret = -ENOENT; @@ -660,8 +659,7 @@ static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp, dinfo = debuginfo_cache__open(tp->module, verbose <= 0); if (dinfo) - ret = debuginfo__find_probe_point(dinfo, - (unsigned long)addr, pp); + ret = debuginfo__find_probe_point(dinfo, addr, pp); else ret = -ENOENT; @@ -676,7 +674,7 @@ static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp, /* Adjust symbol name and address */ static int post_process_probe_trace_point(struct probe_trace_point *tp, - struct map *map, unsigned long offs) + struct map *map, u64 offs) { struct symbol *sym; u64 addr = tp->address - offs; @@ -719,7 +717,7 @@ post_process_offline_probe_trace_events(struct probe_trace_event *tevs, int ntevs, const char *pathname) { struct map *map; - unsigned long stext = 0; + u64 stext = 0; int i, ret = 0; /* Prepare a map for offline binary */ @@ -745,7 +743,7 @@ static int add_exec_to_probe_trace_events(struct probe_trace_event *tevs, struct nsinfo *nsi) { int i, ret = 0; - unsigned long stext = 0; + u64 stext = 0; if (!exec) return 0; @@ -790,7 +788,7 @@ post_process_module_probe_trace_events(struct probe_trace_event *tevs, mod_name = find_module_name(module); for (i = 0; i < ntevs; i++) { ret = post_process_probe_trace_point(&tevs[i].point, - map, (unsigned long)text_offs); + map, text_offs); if (ret < 0) break; tevs[i].point.module = @@ -1534,7 +1532,7 @@ static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) * so tmp[1] should always valid (but could be '\0'). */ if (tmp && !strncmp(tmp, "0x", 2)) { - pp->abs_address = strtoul(pp->function, &tmp, 0); + pp->abs_address = strtoull(pp->function, &tmp, 0); if (*tmp != '\0') { semantic_error("Invalid absolute address.\n"); return -EINVAL; @@ -1909,7 +1907,7 @@ int parse_probe_trace_command(const char *cmd, struct probe_trace_event *tev) argv[i] = NULL; argc -= 1; } else - tp->address = strtoul(fmt1_str, NULL, 0); + tp->address = strtoull(fmt1_str, NULL, 0); } else { /* Only the symbol-based probe has offset */ tp->symbol = strdup(fmt1_str); @@ -2155,7 +2153,7 @@ synthesize_uprobe_trace_def(struct probe_trace_point *tp, struct strbuf *buf) return -EINVAL; /* Use the tp->address for uprobes */ - err = strbuf_addf(buf, "%s:0x%lx", tp->module, tp->address); + err = strbuf_addf(buf, "%s:0x%" PRIx64, tp->module, tp->address); if (err >= 0 && tp->ref_ctr_offset) { if (!uprobe_ref_ctr_is_supported()) @@ -2170,7 +2168,7 @@ synthesize_kprobe_trace_def(struct probe_trace_point *tp, struct strbuf *buf) { if (!strncmp(tp->symbol, "0x", 2)) { /* Absolute address. See try_to_find_absolute_address() */ - return strbuf_addf(buf, "%s%s0x%lx", tp->module ?: "", + return strbuf_addf(buf, "%s%s0x%" PRIx64, tp->module ?: "", tp->module ? ":" : "", tp->address); } else { return strbuf_addf(buf, "%s%s%s+%lu", tp->module ?: "", @@ -2269,7 +2267,7 @@ static int convert_to_perf_probe_point(struct probe_trace_point *tp, pp->function = strdup(tp->symbol); pp->offset = tp->offset; } else { - ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address); + ret = e_snprintf(buf, 128, "0x%" PRIx64, tp->address); if (ret < 0) return ret; pp->function = strdup(buf); @@ -2450,8 +2448,8 @@ void clear_probe_trace_event(struct probe_trace_event *tev) struct kprobe_blacklist_node { struct list_head list; - unsigned long start; - unsigned long end; + u64 start; + u64 end; char *symbol; }; @@ -2496,7 +2494,7 @@ static int kprobe_blacklist__load(struct list_head *blacklist) } INIT_LIST_HEAD(&node->list); list_add_tail(&node->list, blacklist); - if (sscanf(buf, "0x%lx-0x%lx", &node->start, &node->end) != 2) { + if (sscanf(buf, "0x%" PRIx64 "-0x%" PRIx64, &node->start, &node->end) != 2) { ret = -EINVAL; break; } @@ -2512,7 +2510,7 @@ static int kprobe_blacklist__load(struct list_head *blacklist) ret = -ENOMEM; break; } - pr_debug2("Blacklist: 0x%lx-0x%lx, %s\n", + pr_debug2("Blacklist: 0x%" PRIx64 "-0x%" PRIx64 ", %s\n", node->start, node->end, node->symbol); ret++; } @@ -2524,8 +2522,7 @@ static int kprobe_blacklist__load(struct list_head *blacklist) } static struct kprobe_blacklist_node * -kprobe_blacklist__find_by_address(struct list_head *blacklist, - unsigned long address) +kprobe_blacklist__find_by_address(struct list_head *blacklist, u64 address) { struct kprobe_blacklist_node *node; @@ -2553,7 +2550,7 @@ static void kprobe_blacklist__release(void) kprobe_blacklist__delete(&kprobe_blacklist); } -static bool kprobe_blacklist__listed(unsigned long address) +static bool kprobe_blacklist__listed(u64 address) { return !!kprobe_blacklist__find_by_address(&kprobe_blacklist, address); } @@ -3221,7 +3218,7 @@ static int try_to_find_absolute_address(struct perf_probe_event *pev, * In __add_probe_trace_events, a NULL symbol is interpreted as * invalid. */ - if (asprintf(&tp->symbol, "0x%lx", tp->address) < 0) + if (asprintf(&tp->symbol, "0x%" PRIx64, tp->address) < 0) goto errout; /* For kprobe, check range */ @@ -3232,7 +3229,7 @@ static int try_to_find_absolute_address(struct perf_probe_event *pev, goto errout; } - if (asprintf(&tp->realname, "abs_%lx", tp->address) < 0) + if (asprintf(&tp->realname, "abs_%" PRIx64, tp->address) < 0) goto errout; if (pev->target) { diff --git a/tools/perf/util/probe-event.h b/tools/perf/util/probe-event.h index 65769d7949a3..8ad5b1579f1d 100644 --- a/tools/perf/util/probe-event.h +++ b/tools/perf/util/probe-event.h @@ -33,7 +33,7 @@ struct probe_trace_point { char *module; /* Module name */ unsigned long offset; /* Offset from symbol */ unsigned long ref_ctr_offset; /* SDT reference counter offset */ - unsigned long address; /* Actual address of the trace point */ + u64 address; /* Actual address of the trace point */ bool retprobe; /* Return probe flag */ }; @@ -70,7 +70,7 @@ struct perf_probe_point { bool retprobe; /* Return probe flag */ char *lazy_line; /* Lazy matching pattern */ unsigned long offset; /* Offset from function entry */ - unsigned long abs_address; /* Absolute address of the point */ + u64 abs_address; /* Absolute address of the point */ }; /* Perf probe probing argument field chain */ diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c index 02ef0d78053b..50d861a80f57 100644 --- a/tools/perf/util/probe-finder.c +++ b/tools/perf/util/probe-finder.c @@ -668,7 +668,7 @@ static int convert_to_trace_point(Dwarf_Die *sp_die, Dwfl_Module *mod, } tp->offset = (unsigned long)(paddr - eaddr); - tp->address = (unsigned long)paddr; + tp->address = paddr; tp->symbol = strdup(symbol); if (!tp->symbol) return -ENOMEM; @@ -1707,7 +1707,7 @@ int debuginfo__get_text_offset(struct debuginfo *dbg, Dwarf_Addr *offs, } /* Reverse search */ -int debuginfo__find_probe_point(struct debuginfo *dbg, unsigned long addr, +int debuginfo__find_probe_point(struct debuginfo *dbg, u64 addr, struct perf_probe_point *ppt) { Dwarf_Die cudie, spdie, indie; @@ -1720,14 +1720,14 @@ int debuginfo__find_probe_point(struct debuginfo *dbg, unsigned long addr, addr += baseaddr; /* Find cu die */ if (!dwarf_addrdie(dbg->dbg, (Dwarf_Addr)addr, &cudie)) { - pr_warning("Failed to find debug information for address %lx\n", + pr_warning("Failed to find debug information for address %" PRIx64 "\n", addr); ret = -EINVAL; goto end; } /* Find a corresponding line (filename and lineno) */ - cu_find_lineinfo(&cudie, addr, &fname, &lineno); + cu_find_lineinfo(&cudie, (Dwarf_Addr)addr, &fname, &lineno); /* Don't care whether it failed or not */ /* Find a corresponding function (name, baseline and baseaddr) */ @@ -1742,7 +1742,7 @@ int debuginfo__find_probe_point(struct debuginfo *dbg, unsigned long addr, } fname = dwarf_decl_file(&spdie); - if (addr == (unsigned long)baseaddr) { + if (addr == baseaddr) { /* Function entry - Relative line number is 0 */ lineno = baseline; goto post; @@ -1788,7 +1788,7 @@ int debuginfo__find_probe_point(struct debuginfo *dbg, unsigned long addr, if (lineno) ppt->line = lineno - baseline; else if (basefunc) { - ppt->offset = addr - (unsigned long)baseaddr; + ppt->offset = addr - baseaddr; func = basefunc; } @@ -1828,8 +1828,7 @@ static int line_range_add_line(const char *src, unsigned int lineno, } static int line_range_walk_cb(const char *fname, int lineno, - Dwarf_Addr addr __maybe_unused, - void *data) + Dwarf_Addr addr, void *data) { struct line_finder *lf = data; const char *__fname; diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h index 2febb5875678..8bc1c80d3c1c 100644 --- a/tools/perf/util/probe-finder.h +++ b/tools/perf/util/probe-finder.h @@ -46,7 +46,7 @@ int debuginfo__find_trace_events(struct debuginfo *dbg, struct probe_trace_event **tevs); /* Find a perf_probe_point from debuginfo */ -int debuginfo__find_probe_point(struct debuginfo *dbg, unsigned long addr, +int debuginfo__find_probe_point(struct debuginfo *dbg, u64 addr, struct perf_probe_point *ppt); int debuginfo__get_text_offset(struct debuginfo *dbg, Dwarf_Addr *offs, -- 2.30.GIT