From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yb1-f202.google.com (mail-yb1-f202.google.com [209.85.219.202]) (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 79DAC4597F for ; Sat, 18 May 2024 16:53:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716051227; cv=none; b=aP/gb1mCrLZnuYgeS1lGu+f/TgMzl2Dcg3QyeZPoIt/TbLwu3mmAeVpnpBVIzGEmc5XPg13UkARA5t9h3mXfBpVD9nd3Mx/7Iv/w1Hs3HQpj9Ucst7GUShGgbcfJJbNCyc8HvmGYlaV4PrtjVibelXLfMoEiZe7A6qeywFAJFmM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716051227; c=relaxed/simple; bh=eu6ojl58i6PaNBkZTsBa65l6mv2Xh7vqwl4uDCER8f0=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=He9UXGZeWtIM0ywE/caZvlcpMqrSPd2XKOQtS21PO9Z1dhGzAAg5anDlHMYwcjaXRwxuXH1hQfz3Q9+ANPsNBivTHXuaWATBwYM2UG/8gu3Dbd+4jPmE1ZxkTaf3r78HVnRucAveua/TB149kfVsFe49Zq5ODchczXFdiSuNZtY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--sesse.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=XcHrBW4r; arc=none smtp.client-ip=209.85.219.202 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--sesse.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="XcHrBW4r" Received: by mail-yb1-f202.google.com with SMTP id 3f1490d57ef6-dc6b269686aso15819193276.1 for ; Sat, 18 May 2024 09:53:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1716051224; x=1716656024; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=t3v7Wla8eK6FwuQ+NrrrAEqVqGJsnfekL6/dutIVE2c=; b=XcHrBW4r9fJG5mnWlQpMLwsrM/NAkf8YWOj/41FYgC3mHwCmgwP+d978PDGgyey+Ue YFIyfiN9Tk+NGhqNUuKvUarwifMjFTI+55PYWoWZo9ahBjfyE9vAe6D7jZ9UiNb7pnmx OZ1gtqYrh5NSQFVUmv8Qa2J8bpoPLMQSY0s9oGyVylXAvHpK9c4TlyTopJUNiDNK0cug G8qIc9jCQEolgl8ElaiPw02tB/q0sDyuLqm4lyb89CrTzDo4Zfofhq1dgfksX1TBsdG9 xM4sBZsphXnobOjHjoAVbofkLcGzlNMOOhlfoXUfWvVHg9sNZhfTX5eR4OJhtcqRNVw0 0zUg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1716051224; x=1716656024; h=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; bh=t3v7Wla8eK6FwuQ+NrrrAEqVqGJsnfekL6/dutIVE2c=; b=DS3kJ0WIoQ3YCQUZtomoTUnPTaF8B1mTuXkwysuhaU3eTt6zLK+yKcC73nkzOtH5jk FcPh2FbqtMlDRbT3klxXun+kivewcuhGZLNnAs01tagj9pIUnqMtPRMvXzAw/w5T1gfY uwmKuCAC/Kcj8hayyWXxt3pmHQh61ham03x4Yxh2dLfO5YqbrsqxOfFkUPLZxvxSzdPQ l/O7YvQ2ebEoEscIbERtYReo9+EsocWWq3ckcIpYClPnmAIGWIpWOwh2FPDzeMK+vVaQ we09kD1n6A6UroTR9bFntyGpmGv31iez7lvxILTU1yoE6BuGQq2RALkpTvmLM4kfGO8R 6G4w== X-Gm-Message-State: AOJu0YxlJtp9S6u4zj/UYCOI1GOdR1DRPT4WRRoVn5Ngss07OqvHbqEW 51UrsOCkiupjm4WdbLbU2l8erOv9LlLT0HA/Qt91Rx9rykmr6PkBKpCEUFSsmv6ORlcNe0dBcQ= = X-Google-Smtp-Source: AGHT+IEEIPCNIscfY8ZfqwDY04Qp+V/cf3hGM6nbAO2vqNbQ9+4crpfyNW7EO56ldGp7kPx1QkCoa0wpSg== X-Received: from sesse.osl.corp.google.com ([2a00:79e0:18:10:8b68:8208:4316:d53b]) (user=sesse job=sendgmr) by 2002:a05:6902:1002:b0:df4:8cef:8c54 with SMTP id 3f1490d57ef6-df48cef8eb9mr406915276.8.1716051224603; Sat, 18 May 2024 09:53:44 -0700 (PDT) Date: Sat, 18 May 2024 18:53:34 +0200 In-Reply-To: <20240518165335.3963530-1-sesse@google.com> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240518165335.3963530-1-sesse@google.com> X-Mailer: git-send-email 2.45.0.rc1.225.g2a3ae87e7f-goog Message-ID: <20240518165335.3963530-2-sesse@google.com> Subject: [PATCH v2 2/3] perf annotate: split out read_symbol() From: "Steinar H. Gunderson" To: acme@kernel.org Cc: linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, irogers@google.com, "Steinar H. Gunderson" Content-Type: text/plain; charset="UTF-8" The Capstone disassembler code has a useful code snippet to read the bytes for a given code symbol into memory. Split it out into its own function, so that the LLVM disassembler can use it in the next patch. Signed-off-by: Steinar H. Gunderson --- tools/perf/util/disasm.c | 90 +++++++++++++++++++++++++--------------- 1 file changed, 56 insertions(+), 34 deletions(-) diff --git a/tools/perf/util/disasm.c b/tools/perf/util/disasm.c index 72aec8f61b94..c0dbb955e61a 100644 --- a/tools/perf/util/disasm.c +++ b/tools/perf/util/disasm.c @@ -1396,6 +1396,53 @@ static int find_file_offset(u64 start, u64 len, u64 pgoff, void *arg) return 0; } +static u8 * +read_symbol(const char *filename, struct map *map, struct symbol *sym, + u64 *len, bool *is_64bit) +{ + struct dso *dso = map__dso(map); + struct nscookie nsc; + u64 start = map__rip_2objdump(map, sym->start); + u64 end = map__rip_2objdump(map, sym->end); + int fd, count; + u8 *buf = NULL; + struct find_file_offset_data data = { + .ip = start, + }; + + *is_64bit = false; + + nsinfo__mountns_enter(dso__nsinfo(dso), &nsc); + fd = open(filename, O_RDONLY); + nsinfo__mountns_exit(&nsc); + if (fd < 0) + return NULL; + + if (file__read_maps(fd, /*exe=*/true, find_file_offset, &data, + is_64bit) == 0) + goto err; + + *len = end - start; + buf = malloc(*len); + if (buf == NULL) + goto err; + + count = pread(fd, buf, *len, data.offset); + close(fd); + fd = -1; + + if ((u64)count != *len) + goto err; + + return buf; + +err: + if (fd >= 0) + close(fd); + free(buf); + return NULL; +} + static void print_capstone_detail(cs_insn *insn, char *buf, size_t len, struct annotate_args *args, u64 addr) { @@ -1458,19 +1505,13 @@ static int symbol__disassemble_capstone(char *filename, struct symbol *sym, { struct annotation *notes = symbol__annotation(sym); struct map *map = args->ms.map; - struct dso *dso = map__dso(map); - struct nscookie nsc; u64 start = map__rip_2objdump(map, sym->start); - u64 end = map__rip_2objdump(map, sym->end); - u64 len = end - start; + u64 len; u64 offset; - int i, fd, count; + int i, count; bool is_64bit = false; bool needs_cs_close = false; u8 *buf = NULL; - struct find_file_offset_data data = { - .ip = start, - }; csh handle; cs_insn *insn; char disasm_buf[512]; @@ -1479,31 +1520,9 @@ static int symbol__disassemble_capstone(char *filename, struct symbol *sym, if (args->options->objdump_path) return -1; - nsinfo__mountns_enter(dso__nsinfo(dso), &nsc); - fd = open(filename, O_RDONLY); - nsinfo__mountns_exit(&nsc); - if (fd < 0) - return -1; - - if (file__read_maps(fd, /*exe=*/true, find_file_offset, &data, - &is_64bit) == 0) - goto err; - - if (open_capstone_handle(args, is_64bit, &handle) < 0) - goto err; - - needs_cs_close = true; - - buf = malloc(len); + buf = read_symbol(filename, map, sym, &len, &is_64bit); if (buf == NULL) - goto err; - - count = pread(fd, buf, len, data.offset); - close(fd); - fd = -1; - - if ((u64)count != len) - goto err; + return -1; /* add the function address and name */ scnprintf(disasm_buf, sizeof(disasm_buf), "%#"PRIx64" <%s>:", @@ -1521,6 +1540,11 @@ static int symbol__disassemble_capstone(char *filename, struct symbol *sym, annotation_line__add(&dl->al, ¬es->src->source); + if (open_capstone_handle(args, is_64bit, &handle) < 0) + goto err; + + needs_cs_close = true; + count = cs_disasm(handle, buf, len, start, len, &insn); for (i = 0, offset = 0; i < count; i++) { int printed; @@ -1565,8 +1589,6 @@ static int symbol__disassemble_capstone(char *filename, struct symbol *sym, return count < 0 ? count : 0; err: - if (fd >= 0) - close(fd); if (needs_cs_close) { struct disasm_line *tmp; -- 2.43.0