b9c1b51e45
*** to conform to clang-format’s LLVM style. This kind of mass change has
*** two obvious implications:
Firstly, merging this particular commit into a downstream fork may be a huge
effort. Alternatively, it may be worth merging all changes up to this commit,
performing the same reformatting operation locally, and then discarding the
merge for this particular commit. The commands used to accomplish this
reformatting were as follows (with current working directory as the root of
the repository):
find . \( -iname "*.c" -or -iname "*.cpp" -or -iname "*.h" -or -iname "*.mm" \) -exec clang-format -i {} +
find . -iname "*.py" -exec autopep8 --in-place --aggressive --aggressive {} + ;
The version of clang-format used was 3.9.0, and autopep8 was 1.2.4.
Secondly, “blame” style tools will generally point to this commit instead of
a meaningful prior commit. There are alternatives available that will attempt
to look through this change and find the appropriate prior commit. YMMV.
llvm-svn: 280751
104 lines
3.0 KiB
C++
104 lines
3.0 KiB
C++
//===-- ProcFileReader.cpp --------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "Plugins/Process/Linux/ProcFileReader.h"
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// C Headers
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#include <fcntl.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <stdio.h>
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#include <sys/stat.h>
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// C++ Headers
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#include <fstream>
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// LLDB Headers
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#include "lldb/Core/DataBufferHeap.h"
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#include "lldb/Core/Error.h"
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using namespace lldb_private;
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using namespace lldb_private::process_linux;
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lldb::DataBufferSP ProcFileReader::ReadIntoDataBuffer(lldb::pid_t pid,
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const char *name) {
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int fd;
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char path[PATH_MAX];
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// Make sure we've got a nil terminated buffer for all the folks calling
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// GetBytes() directly off our returned DataBufferSP if we hit an error.
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lldb::DataBufferSP buf_sp(new DataBufferHeap(1, 0));
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// Ideally, we would simply create a FileSpec and call ReadFileContents.
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// However, files in procfs have zero size (since they are, in general,
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// dynamically generated by the kernel) which is incompatible with the
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// current ReadFileContents implementation. Therefore we simply stream the
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// data into a DataBuffer ourselves.
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if (snprintf(path, PATH_MAX, "/proc/%" PRIu64 "/%s", pid, name) > 0) {
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if ((fd = open(path, O_RDONLY, 0)) >= 0) {
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size_t bytes_read = 0;
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std::unique_ptr<DataBufferHeap> buf_ap(new DataBufferHeap(1024, 0));
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for (;;) {
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size_t avail = buf_ap->GetByteSize() - bytes_read;
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ssize_t status = read(fd, buf_ap->GetBytes() + bytes_read, avail);
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if (status < 0)
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break;
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if (status == 0) {
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buf_ap->SetByteSize(bytes_read);
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buf_sp.reset(buf_ap.release());
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break;
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}
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bytes_read += status;
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if (avail - status == 0)
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buf_ap->SetByteSize(2 * buf_ap->GetByteSize());
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}
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close(fd);
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}
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}
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return buf_sp;
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}
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Error ProcFileReader::ProcessLineByLine(
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lldb::pid_t pid, const char *name,
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std::function<bool(const std::string &line)> line_parser) {
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Error error;
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// Try to open the /proc/{pid}/maps entry.
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char filename[PATH_MAX];
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snprintf(filename, sizeof(filename), "/proc/%" PRIu64 "/%s", pid, name);
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filename[sizeof(filename) - 1] = '\0';
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std::ifstream proc_file(filename);
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if (proc_file.fail()) {
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error.SetErrorStringWithFormat("failed to open file '%s'", filename);
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return error;
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}
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// Read the file line by line, processing until either end of file or when the
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// line_parser returns false.
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std::string line;
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bool should_continue = true;
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while (should_continue && std::getline(proc_file, line)) {
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// Pass the line over to the line_parser for processing. If the line_parser
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// returns false, we
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// stop processing.
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should_continue = line_parser(line);
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}
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return error;
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}
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