808142876c
Summary: A *.cpp file header in LLDB (and in LLDB) should like this: ``` //===-- TestUtilities.cpp -------------------------------------------------===// ``` However in LLDB most of our source files have arbitrary changes to this format and these changes are spreading through LLDB as folks usually just use the existing source files as templates for their new files (most notably the unnecessary editor language indicator `-*- C++ -*-` is spreading and in every review someone is pointing out that this is wrong, resulting in people pointing out that this is done in the same way in other files). This patch removes most of these inconsistencies including the editor language indicators, all the different missing/additional '-' characters, files that center the file name, missing trailing `===//` (mostly caused by clang-format breaking the line). Reviewers: aprantl, espindola, jfb, shafik, JDevlieghere Reviewed By: JDevlieghere Subscribers: dexonsmith, wuzish, emaste, sdardis, nemanjai, kbarton, MaskRay, atanasyan, arphaman, jfb, abidh, jsji, JDevlieghere, usaxena95, lldb-commits Tags: #lldb Differential Revision: https://reviews.llvm.org/D73258
113 lines
4.3 KiB
C++
113 lines
4.3 KiB
C++
//===-- LinuxProcMaps.cpp -------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "LinuxProcMaps.h"
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#include "llvm/ADT/StringRef.h"
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#include "lldb/Target/MemoryRegionInfo.h"
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#include "lldb/Utility/Status.h"
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#include "lldb/Utility/StringExtractor.h"
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using namespace lldb_private;
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static Status
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ParseMemoryRegionInfoFromProcMapsLine(llvm::StringRef maps_line,
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MemoryRegionInfo &memory_region_info) {
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memory_region_info.Clear();
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StringExtractor line_extractor(maps_line);
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// Format: {address_start_hex}-{address_end_hex} perms offset dev inode
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// pathname perms: rwxp (letter is present if set, '-' if not, final
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// character is p=private, s=shared).
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// Parse out the starting address
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lldb::addr_t start_address = line_extractor.GetHexMaxU64(false, 0);
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// Parse out hyphen separating start and end address from range.
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if (!line_extractor.GetBytesLeft() || (line_extractor.GetChar() != '-'))
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return Status(
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"malformed /proc/{pid}/maps entry, missing dash between address range");
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// Parse out the ending address
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lldb::addr_t end_address = line_extractor.GetHexMaxU64(false, start_address);
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// Parse out the space after the address.
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if (!line_extractor.GetBytesLeft() || (line_extractor.GetChar() != ' '))
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return Status(
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"malformed /proc/{pid}/maps entry, missing space after range");
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// Save the range.
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memory_region_info.GetRange().SetRangeBase(start_address);
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memory_region_info.GetRange().SetRangeEnd(end_address);
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// Any memory region in /proc/{pid}/maps is by definition mapped into the
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// process.
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memory_region_info.SetMapped(MemoryRegionInfo::OptionalBool::eYes);
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// Parse out each permission entry.
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if (line_extractor.GetBytesLeft() < 4)
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return Status("malformed /proc/{pid}/maps entry, missing some portion of "
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"permissions");
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// Handle read permission.
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const char read_perm_char = line_extractor.GetChar();
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if (read_perm_char == 'r')
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memory_region_info.SetReadable(MemoryRegionInfo::OptionalBool::eYes);
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else if (read_perm_char == '-')
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memory_region_info.SetReadable(MemoryRegionInfo::OptionalBool::eNo);
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else
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return Status("unexpected /proc/{pid}/maps read permission char");
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// Handle write permission.
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const char write_perm_char = line_extractor.GetChar();
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if (write_perm_char == 'w')
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memory_region_info.SetWritable(MemoryRegionInfo::OptionalBool::eYes);
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else if (write_perm_char == '-')
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memory_region_info.SetWritable(MemoryRegionInfo::OptionalBool::eNo);
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else
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return Status("unexpected /proc/{pid}/maps write permission char");
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// Handle execute permission.
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const char exec_perm_char = line_extractor.GetChar();
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if (exec_perm_char == 'x')
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memory_region_info.SetExecutable(MemoryRegionInfo::OptionalBool::eYes);
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else if (exec_perm_char == '-')
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memory_region_info.SetExecutable(MemoryRegionInfo::OptionalBool::eNo);
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else
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return Status("unexpected /proc/{pid}/maps exec permission char");
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line_extractor.GetChar(); // Read the private bit
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line_extractor.SkipSpaces(); // Skip the separator
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line_extractor.GetHexMaxU64(false, 0); // Read the offset
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line_extractor.GetHexMaxU64(false, 0); // Read the major device number
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line_extractor.GetChar(); // Read the device id separator
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line_extractor.GetHexMaxU64(false, 0); // Read the major device number
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line_extractor.SkipSpaces(); // Skip the separator
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line_extractor.GetU64(0, 10); // Read the inode number
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line_extractor.SkipSpaces();
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const char *name = line_extractor.Peek();
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if (name)
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memory_region_info.SetName(name);
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return Status();
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}
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void lldb_private::ParseLinuxMapRegions(llvm::StringRef linux_map,
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LinuxMapCallback const &callback) {
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llvm::StringRef lines(linux_map);
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llvm::StringRef line;
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while (!lines.empty()) {
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std::tie(line, lines) = lines.split('\n');
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MemoryRegionInfo region;
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Status error = ParseMemoryRegionInfoFromProcMapsLine(line, region);
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if (!callback(region, error))
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break;
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}
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}
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