From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-lf1-f73.google.com (mail-lf1-f73.google.com [209.85.167.73]) (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 A2F1B1CA81 for ; Mon, 20 May 2024 08:30:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716193860; cv=none; b=kvGQShNew1KGN54SSq7C4u8Hdr7/uzt17qq0Oy5b4srjj2uRLxgQYAGVxK+CPhkMSF6JAak39jZrVdDaUMZHSZ8ws7WFS8VxwPccHYRS29Mzl1aUBzpfj3Pha1khaRHBULBA1J4g2Uu5yBGRBV/Ug4ekAzy0xw0Y65qxEqW/dWo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716193860; c=relaxed/simple; bh=eu6ojl58i6PaNBkZTsBa65l6mv2Xh7vqwl4uDCER8f0=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=CRSLDHd6TxV9/3WeSbn01kZ4Dr1J/5kkvSnf5++6oJGPRDT3JlldeMsV75gKPZhdYjJptHA0dw3xUDrl5QFrDzM3rIT4aonz2MANO6/8ZYQTjypbFCHS6LHMK9kP5c8+v9AvOAJrF0Mcc6g/HZyobC8RVgbwjqWqrc55QFpmqdQ= 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=opiKHQfl; arc=none smtp.client-ip=209.85.167.73 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="opiKHQfl" Received: by mail-lf1-f73.google.com with SMTP id 2adb3069b0e04-523936877dbso4300984e87.2 for ; Mon, 20 May 2024 01:30:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1716193857; x=1716798657; 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=opiKHQfl/WRVM8+Vd2a905tjkX5mcnoLmLn9SthPuu9rFQHO5civ9aSA/SRYF4MT0h QCsVohw7WxZpf0qUx2U9amZoNtAwrkBbmBPTOXbr3E7AielnbH5YI8d6afTk0Lvfr9+h WRKVtkxHsZhq3asPJ58Ayq1b4cd8dr/ja45kYLlcJPUoKufg21DM7FXl97L8CugAoL7f IJMIK0umkwIFEaQxoCSA2eXiKddY/+XXk+qjXy69X+ceFeMvtwgGZ2+wOORCACyU/FRJ i1t62W26lmKnfDmsazVOOkl0mT0I1gdNYjbuQC3bRJV9hW93WUo1fbdE1nnCKHZr6HTf hgwQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1716193857; x=1716798657; 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=MAYTFaZtJ4xb7wCfFwAiypskEKiuNJRLoE0MT1BETYH34yMEEXf5Uuo1ErOdyTQHeN w9+et+hmffD09+BC/G9BrXAAZHHdakcfYY6k8Uag+VgtmdvsEqxE+nT4OShv8y26jK/T q4KkWVc6ZSBNp9u7iuTlYDiAYs7DHOwSjCiitj/+qL2vzn4KHDmlJKdWSiPMFvBWDWW+ 5HtJ92IilnvgmIUgbh6zghQIRzrSa6j/CQiKFnjnPp7LjjIysiHUw4MGQpW3G5DY+1M+ s7nJFFcS7d6KBCQ/wmh+YcjKOE3j9WZKDf6Jc69Cjmh93qJy+ueCq2ka8/L7zHGRPXNp 5F0Q== X-Gm-Message-State: AOJu0YwdFfoYgH3RolTzomotDdfHFq3M9ChmqD7QplnEWL/RAlwMcW5V FdAYsKa8SEKNXR85gZl/Z8NE/mmFx+Wc06JJNJHAvPa1IW2UiRTQQPG0LpUX2KMio3SxNCCewA= = X-Google-Smtp-Source: AGHT+IGU3P+9McvbQ/F1CKntVZeGiyVuZEE8QZkv5ejUH7dTZ8+AObX8fUW28ywqlSX2CdyUj1u9htW6TQ== X-Received: from sesse.osl.corp.google.com ([2a00:79e0:18:10:d897:cddc:22b9:d054]) (user=sesse job=sendgmr) by 2002:a05:6512:2e2:b0:517:5d67:2e6 with SMTP id 2adb3069b0e04-52210074a4emr29233e87.6.1716193855803; Mon, 20 May 2024 01:30:55 -0700 (PDT) Date: Mon, 20 May 2024 10:30:47 +0200 In-Reply-To: <20240520083048.322863-1-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: <20240520083048.322863-1-sesse@google.com> X-Mailer: git-send-email 2.45.0.rc1.225.g2a3ae87e7f-goog Message-ID: <20240520083048.322863-2-sesse@google.com> Subject: [PATCH v4 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