forked from OSchip/llvm-project
700 lines
22 KiB
C++
700 lines
22 KiB
C++
//===-- SourceManager.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 "lldb/Core/SourceManager.h"
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#include "lldb/Core/Address.h"
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#include "lldb/Core/AddressRange.h"
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#include "lldb/Core/Debugger.h"
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#include "lldb/Core/FormatEntity.h"
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#include "lldb/Core/Highlighter.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/ModuleList.h"
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#include "lldb/Host/FileSystem.h"
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#include "lldb/Symbol/CompileUnit.h"
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#include "lldb/Symbol/Function.h"
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#include "lldb/Symbol/LineEntry.h"
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#include "lldb/Symbol/SymbolContext.h"
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#include "lldb/Target/PathMappingList.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Utility/ConstString.h"
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#include "lldb/Utility/DataBuffer.h"
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#include "lldb/Utility/DataBufferLLVM.h"
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#include "lldb/Utility/RegularExpression.h"
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#include "lldb/Utility/Stream.h"
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#include "lldb/lldb-enumerations.h"
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#include "llvm/ADT/Twine.h"
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#include <memory>
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#include <utility>
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#include <assert.h>
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#include <stdio.h>
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namespace lldb_private {
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class ExecutionContext;
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}
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namespace lldb_private {
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class ValueObject;
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}
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using namespace lldb;
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using namespace lldb_private;
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static inline bool is_newline_char(char ch) { return ch == '\n' || ch == '\r'; }
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// SourceManager constructor
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SourceManager::SourceManager(const TargetSP &target_sp)
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: m_last_file_sp(), m_last_line(0), m_last_count(0), m_default_set(false),
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m_target_wp(target_sp),
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m_debugger_wp(target_sp->GetDebugger().shared_from_this()) {}
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SourceManager::SourceManager(const DebuggerSP &debugger_sp)
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: m_last_file_sp(), m_last_line(0), m_last_count(0), m_default_set(false),
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m_target_wp(), m_debugger_wp(debugger_sp) {}
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// Destructor
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SourceManager::~SourceManager() {}
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SourceManager::FileSP SourceManager::GetFile(const FileSpec &file_spec) {
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bool same_as_previous =
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m_last_file_sp &&
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FileSpec::Match(file_spec, m_last_file_sp->GetFileSpec());
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DebuggerSP debugger_sp(m_debugger_wp.lock());
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FileSP file_sp;
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if (same_as_previous)
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file_sp = m_last_file_sp;
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else if (debugger_sp)
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file_sp = debugger_sp->GetSourceFileCache().FindSourceFile(file_spec);
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TargetSP target_sp(m_target_wp.lock());
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// It the target source path map has been updated, get this file again so we
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// can successfully remap the source file
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if (target_sp && file_sp &&
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file_sp->GetSourceMapModificationID() !=
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target_sp->GetSourcePathMap().GetModificationID())
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file_sp.reset();
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// Update the file contents if needed if we found a file
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if (file_sp)
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file_sp->UpdateIfNeeded();
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// If file_sp is no good or it points to a non-existent file, reset it.
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if (!file_sp || !FileSystem::Instance().Exists(file_sp->GetFileSpec())) {
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if (target_sp)
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file_sp = std::make_shared<File>(file_spec, target_sp.get());
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else
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file_sp = std::make_shared<File>(file_spec, debugger_sp);
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if (debugger_sp)
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debugger_sp->GetSourceFileCache().AddSourceFile(file_sp);
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}
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return file_sp;
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}
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static bool should_highlight_source(DebuggerSP debugger_sp) {
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if (!debugger_sp)
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return false;
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// We don't use ANSI stop column formatting if the debugger doesn't think it
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// should be using color.
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if (!debugger_sp->GetUseColor())
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return false;
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return debugger_sp->GetHighlightSource();
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}
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static bool should_show_stop_column_with_ansi(DebuggerSP debugger_sp) {
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// We don't use ANSI stop column formatting if we can't lookup values from
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// the debugger.
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if (!debugger_sp)
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return false;
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// We don't use ANSI stop column formatting if the debugger doesn't think it
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// should be using color.
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if (!debugger_sp->GetUseColor())
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return false;
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// We only use ANSI stop column formatting if we're either supposed to show
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// ANSI where available (which we know we have when we get to this point), or
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// if we're only supposed to use ANSI.
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const auto value = debugger_sp->GetStopShowColumn();
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return ((value == eStopShowColumnAnsiOrCaret) ||
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(value == eStopShowColumnAnsi));
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}
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static bool should_show_stop_column_with_caret(DebuggerSP debugger_sp) {
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// We don't use text-based stop column formatting if we can't lookup values
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// from the debugger.
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if (!debugger_sp)
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return false;
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// If we're asked to show the first available of ANSI or caret, then we do
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// show the caret when ANSI is not available.
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const auto value = debugger_sp->GetStopShowColumn();
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if ((value == eStopShowColumnAnsiOrCaret) && !debugger_sp->GetUseColor())
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return true;
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// The only other time we use caret is if we're explicitly asked to show
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// caret.
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return value == eStopShowColumnCaret;
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}
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size_t SourceManager::DisplaySourceLinesWithLineNumbersUsingLastFile(
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uint32_t start_line, uint32_t count, uint32_t curr_line, uint32_t column,
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const char *current_line_cstr, Stream *s,
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const SymbolContextList *bp_locs) {
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if (count == 0)
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return 0;
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Stream::ByteDelta delta(*s);
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if (start_line == 0) {
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if (m_last_line != 0 && m_last_line != UINT32_MAX)
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start_line = m_last_line + m_last_count;
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else
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start_line = 1;
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}
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if (!m_default_set) {
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FileSpec tmp_spec;
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uint32_t tmp_line;
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GetDefaultFileAndLine(tmp_spec, tmp_line);
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}
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m_last_line = start_line;
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m_last_count = count;
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if (m_last_file_sp.get()) {
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const uint32_t end_line = start_line + count - 1;
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for (uint32_t line = start_line; line <= end_line; ++line) {
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if (!m_last_file_sp->LineIsValid(line)) {
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m_last_line = UINT32_MAX;
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break;
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}
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char prefix[32] = "";
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if (bp_locs) {
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uint32_t bp_count = bp_locs->NumLineEntriesWithLine(line);
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if (bp_count > 0)
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::snprintf(prefix, sizeof(prefix), "[%u] ", bp_count);
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else
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::snprintf(prefix, sizeof(prefix), " ");
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}
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s->Printf("%s%2.2s %-4u\t", prefix,
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line == curr_line ? current_line_cstr : "", line);
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// So far we treated column 0 as a special 'no column value', but
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// DisplaySourceLines starts counting columns from 0 (and no column is
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// expressed by passing an empty optional).
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llvm::Optional<size_t> columnToHighlight;
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if (line == curr_line && column)
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columnToHighlight = column - 1;
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size_t this_line_size =
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m_last_file_sp->DisplaySourceLines(line, columnToHighlight, 0, 0, s);
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if (column != 0 && line == curr_line &&
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should_show_stop_column_with_caret(m_debugger_wp.lock())) {
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// Display caret cursor.
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std::string src_line;
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m_last_file_sp->GetLine(line, src_line);
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s->Printf(" \t");
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// Insert a space for every non-tab character in the source line.
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for (size_t i = 0; i + 1 < column && i < src_line.length(); ++i)
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s->PutChar(src_line[i] == '\t' ? '\t' : ' ');
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// Now add the caret.
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s->Printf("^\n");
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}
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if (this_line_size == 0) {
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m_last_line = UINT32_MAX;
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break;
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}
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}
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}
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return *delta;
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}
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size_t SourceManager::DisplaySourceLinesWithLineNumbers(
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const FileSpec &file_spec, uint32_t line, uint32_t column,
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uint32_t context_before, uint32_t context_after,
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const char *current_line_cstr, Stream *s,
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const SymbolContextList *bp_locs) {
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FileSP file_sp(GetFile(file_spec));
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uint32_t start_line;
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uint32_t count = context_before + context_after + 1;
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if (line > context_before)
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start_line = line - context_before;
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else
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start_line = 1;
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if (m_last_file_sp.get() != file_sp.get()) {
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if (line == 0)
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m_last_line = 0;
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m_last_file_sp = file_sp;
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}
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return DisplaySourceLinesWithLineNumbersUsingLastFile(
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start_line, count, line, column, current_line_cstr, s, bp_locs);
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}
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size_t SourceManager::DisplayMoreWithLineNumbers(
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Stream *s, uint32_t count, bool reverse, const SymbolContextList *bp_locs) {
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// If we get called before anybody has set a default file and line, then try
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// to figure it out here.
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const bool have_default_file_line = m_last_file_sp && m_last_line > 0;
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if (!m_default_set) {
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FileSpec tmp_spec;
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uint32_t tmp_line;
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GetDefaultFileAndLine(tmp_spec, tmp_line);
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}
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if (m_last_file_sp) {
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if (m_last_line == UINT32_MAX)
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return 0;
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if (reverse && m_last_line == 1)
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return 0;
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if (count > 0)
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m_last_count = count;
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else if (m_last_count == 0)
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m_last_count = 10;
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if (m_last_line > 0) {
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if (reverse) {
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// If this is the first time we've done a reverse, then back up one
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// more time so we end up showing the chunk before the last one we've
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// shown:
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if (m_last_line > m_last_count)
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m_last_line -= m_last_count;
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else
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m_last_line = 1;
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} else if (have_default_file_line)
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m_last_line += m_last_count;
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} else
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m_last_line = 1;
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const uint32_t column = 0;
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return DisplaySourceLinesWithLineNumbersUsingLastFile(
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m_last_line, m_last_count, UINT32_MAX, column, "", s, bp_locs);
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}
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return 0;
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}
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bool SourceManager::SetDefaultFileAndLine(const FileSpec &file_spec,
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uint32_t line) {
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FileSP old_file_sp = m_last_file_sp;
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m_last_file_sp = GetFile(file_spec);
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m_default_set = true;
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if (m_last_file_sp) {
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m_last_line = line;
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return true;
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} else {
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m_last_file_sp = old_file_sp;
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return false;
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}
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}
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bool SourceManager::GetDefaultFileAndLine(FileSpec &file_spec, uint32_t &line) {
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if (m_last_file_sp) {
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file_spec = m_last_file_sp->GetFileSpec();
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line = m_last_line;
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return true;
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} else if (!m_default_set) {
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TargetSP target_sp(m_target_wp.lock());
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if (target_sp) {
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// If nobody has set the default file and line then try here. If there's
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// no executable, then we will try again later when there is one.
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// Otherwise, if we can't find it we won't look again, somebody will have
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// to set it (for instance when we stop somewhere...)
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Module *executable_ptr = target_sp->GetExecutableModulePointer();
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if (executable_ptr) {
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SymbolContextList sc_list;
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ConstString main_name("main");
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bool symbols_okay = false; // Force it to be a debug symbol.
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bool inlines_okay = true;
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executable_ptr->FindFunctions(main_name, nullptr,
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lldb::eFunctionNameTypeBase, inlines_okay,
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symbols_okay, sc_list);
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size_t num_matches = sc_list.GetSize();
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for (size_t idx = 0; idx < num_matches; idx++) {
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SymbolContext sc;
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sc_list.GetContextAtIndex(idx, sc);
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if (sc.function) {
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lldb_private::LineEntry line_entry;
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if (sc.function->GetAddressRange()
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.GetBaseAddress()
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.CalculateSymbolContextLineEntry(line_entry)) {
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SetDefaultFileAndLine(line_entry.file, line_entry.line);
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file_spec = m_last_file_sp->GetFileSpec();
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line = m_last_line;
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return true;
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}
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}
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}
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}
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}
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}
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return false;
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}
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void SourceManager::FindLinesMatchingRegex(FileSpec &file_spec,
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RegularExpression ®ex,
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uint32_t start_line,
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uint32_t end_line,
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std::vector<uint32_t> &match_lines) {
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match_lines.clear();
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FileSP file_sp = GetFile(file_spec);
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if (!file_sp)
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return;
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return file_sp->FindLinesMatchingRegex(regex, start_line, end_line,
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match_lines);
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}
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SourceManager::File::File(const FileSpec &file_spec,
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lldb::DebuggerSP debugger_sp)
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: m_file_spec_orig(file_spec), m_file_spec(file_spec),
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m_mod_time(FileSystem::Instance().GetModificationTime(file_spec)),
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m_debugger_wp(debugger_sp) {
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CommonInitializer(file_spec, nullptr);
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}
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SourceManager::File::File(const FileSpec &file_spec, Target *target)
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: m_file_spec_orig(file_spec), m_file_spec(file_spec),
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m_mod_time(FileSystem::Instance().GetModificationTime(file_spec)),
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m_debugger_wp(target ? target->GetDebugger().shared_from_this()
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: DebuggerSP()) {
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CommonInitializer(file_spec, target);
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}
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void SourceManager::File::CommonInitializer(const FileSpec &file_spec,
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Target *target) {
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if (m_mod_time == llvm::sys::TimePoint<>()) {
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if (target) {
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m_source_map_mod_id = target->GetSourcePathMap().GetModificationID();
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if (!file_spec.GetDirectory() && file_spec.GetFilename()) {
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// If this is just a file name, lets see if we can find it in the
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// target:
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bool check_inlines = false;
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SymbolContextList sc_list;
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size_t num_matches =
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target->GetImages().ResolveSymbolContextForFilePath(
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file_spec.GetFilename().AsCString(), 0, check_inlines,
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SymbolContextItem(eSymbolContextModule |
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eSymbolContextCompUnit),
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sc_list);
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bool got_multiple = false;
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if (num_matches != 0) {
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if (num_matches > 1) {
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SymbolContext sc;
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CompileUnit *test_cu = nullptr;
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for (unsigned i = 0; i < num_matches; i++) {
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sc_list.GetContextAtIndex(i, sc);
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if (sc.comp_unit) {
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if (test_cu) {
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if (test_cu != sc.comp_unit)
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got_multiple = true;
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break;
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} else
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test_cu = sc.comp_unit;
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}
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}
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}
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if (!got_multiple) {
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SymbolContext sc;
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sc_list.GetContextAtIndex(0, sc);
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if (sc.comp_unit)
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m_file_spec = sc.comp_unit->GetPrimaryFile();
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m_mod_time = FileSystem::Instance().GetModificationTime(m_file_spec);
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}
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}
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}
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// Try remapping if m_file_spec does not correspond to an existing file.
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if (!FileSystem::Instance().Exists(m_file_spec)) {
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FileSpec new_file_spec;
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// Check target specific source remappings first, then fall back to
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// modules objects can have individual path remappings that were
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// detected when the debug info for a module was found. then
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if (target->GetSourcePathMap().FindFile(m_file_spec, new_file_spec) ||
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target->GetImages().FindSourceFile(m_file_spec, new_file_spec)) {
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m_file_spec = new_file_spec;
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m_mod_time = FileSystem::Instance().GetModificationTime(m_file_spec);
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}
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}
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}
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}
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if (m_mod_time != llvm::sys::TimePoint<>())
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m_data_sp = FileSystem::Instance().CreateDataBuffer(m_file_spec);
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}
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uint32_t SourceManager::File::GetLineOffset(uint32_t line) {
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if (line == 0)
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return UINT32_MAX;
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if (line == 1)
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return 0;
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if (CalculateLineOffsets(line)) {
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if (line < m_offsets.size())
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return m_offsets[line - 1]; // yes we want "line - 1" in the index
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}
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return UINT32_MAX;
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}
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uint32_t SourceManager::File::GetNumLines() {
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CalculateLineOffsets();
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return m_offsets.size();
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}
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const char *SourceManager::File::PeekLineData(uint32_t line) {
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if (!LineIsValid(line))
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return nullptr;
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size_t line_offset = GetLineOffset(line);
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if (line_offset < m_data_sp->GetByteSize())
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return (const char *)m_data_sp->GetBytes() + line_offset;
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return nullptr;
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}
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uint32_t SourceManager::File::GetLineLength(uint32_t line,
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bool include_newline_chars) {
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if (!LineIsValid(line))
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return false;
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size_t start_offset = GetLineOffset(line);
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size_t end_offset = GetLineOffset(line + 1);
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if (end_offset == UINT32_MAX)
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end_offset = m_data_sp->GetByteSize();
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if (end_offset > start_offset) {
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uint32_t length = end_offset - start_offset;
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if (!include_newline_chars) {
|
|
const char *line_start =
|
|
(const char *)m_data_sp->GetBytes() + start_offset;
|
|
while (length > 0) {
|
|
const char last_char = line_start[length - 1];
|
|
if ((last_char == '\r') || (last_char == '\n'))
|
|
--length;
|
|
else
|
|
break;
|
|
}
|
|
}
|
|
return length;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
bool SourceManager::File::LineIsValid(uint32_t line) {
|
|
if (line == 0)
|
|
return false;
|
|
|
|
if (CalculateLineOffsets(line))
|
|
return line < m_offsets.size();
|
|
return false;
|
|
}
|
|
|
|
void SourceManager::File::UpdateIfNeeded() {
|
|
// TODO: use host API to sign up for file modifications to anything in our
|
|
// source cache and only update when we determine a file has been updated.
|
|
// For now we check each time we want to display info for the file.
|
|
auto curr_mod_time = FileSystem::Instance().GetModificationTime(m_file_spec);
|
|
|
|
if (curr_mod_time != llvm::sys::TimePoint<>() &&
|
|
m_mod_time != curr_mod_time) {
|
|
m_mod_time = curr_mod_time;
|
|
m_data_sp = FileSystem::Instance().CreateDataBuffer(m_file_spec);
|
|
m_offsets.clear();
|
|
}
|
|
}
|
|
|
|
size_t SourceManager::File::DisplaySourceLines(uint32_t line,
|
|
llvm::Optional<size_t> column,
|
|
uint32_t context_before,
|
|
uint32_t context_after,
|
|
Stream *s) {
|
|
// Nothing to write if there's no stream.
|
|
if (!s)
|
|
return 0;
|
|
|
|
// Sanity check m_data_sp before proceeding.
|
|
if (!m_data_sp)
|
|
return 0;
|
|
|
|
size_t bytes_written = s->GetWrittenBytes();
|
|
|
|
auto debugger_sp = m_debugger_wp.lock();
|
|
|
|
HighlightStyle style;
|
|
// Use the default Vim style if source highlighting is enabled.
|
|
if (should_highlight_source(debugger_sp))
|
|
style = HighlightStyle::MakeVimStyle();
|
|
|
|
// If we should mark the stop column with color codes, then copy the prefix
|
|
// and suffix to our color style.
|
|
if (should_show_stop_column_with_ansi(debugger_sp))
|
|
style.selected.Set(debugger_sp->GetStopShowColumnAnsiPrefix(),
|
|
debugger_sp->GetStopShowColumnAnsiSuffix());
|
|
|
|
HighlighterManager mgr;
|
|
std::string path = GetFileSpec().GetPath(/*denormalize*/ false);
|
|
// FIXME: Find a way to get the definitive language this file was written in
|
|
// and pass it to the highlighter.
|
|
const auto &h = mgr.getHighlighterFor(lldb::eLanguageTypeUnknown, path);
|
|
|
|
const uint32_t start_line =
|
|
line <= context_before ? 1 : line - context_before;
|
|
const uint32_t start_line_offset = GetLineOffset(start_line);
|
|
if (start_line_offset != UINT32_MAX) {
|
|
const uint32_t end_line = line + context_after;
|
|
uint32_t end_line_offset = GetLineOffset(end_line + 1);
|
|
if (end_line_offset == UINT32_MAX)
|
|
end_line_offset = m_data_sp->GetByteSize();
|
|
|
|
assert(start_line_offset <= end_line_offset);
|
|
if (start_line_offset < end_line_offset) {
|
|
size_t count = end_line_offset - start_line_offset;
|
|
const uint8_t *cstr = m_data_sp->GetBytes() + start_line_offset;
|
|
|
|
auto ref = llvm::StringRef(reinterpret_cast<const char *>(cstr), count);
|
|
|
|
h.Highlight(style, ref, column, "", *s);
|
|
|
|
// Ensure we get an end of line character one way or another.
|
|
if (!is_newline_char(ref.back()))
|
|
s->EOL();
|
|
}
|
|
}
|
|
return s->GetWrittenBytes() - bytes_written;
|
|
}
|
|
|
|
void SourceManager::File::FindLinesMatchingRegex(
|
|
RegularExpression ®ex, uint32_t start_line, uint32_t end_line,
|
|
std::vector<uint32_t> &match_lines) {
|
|
match_lines.clear();
|
|
|
|
if (!LineIsValid(start_line) ||
|
|
(end_line != UINT32_MAX && !LineIsValid(end_line)))
|
|
return;
|
|
if (start_line > end_line)
|
|
return;
|
|
|
|
for (uint32_t line_no = start_line; line_no < end_line; line_no++) {
|
|
std::string buffer;
|
|
if (!GetLine(line_no, buffer))
|
|
break;
|
|
if (regex.Execute(buffer)) {
|
|
match_lines.push_back(line_no);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool lldb_private::operator==(const SourceManager::File &lhs,
|
|
const SourceManager::File &rhs) {
|
|
if (lhs.m_file_spec != rhs.m_file_spec)
|
|
return false;
|
|
return lhs.m_mod_time == rhs.m_mod_time;
|
|
}
|
|
|
|
bool SourceManager::File::CalculateLineOffsets(uint32_t line) {
|
|
line =
|
|
UINT32_MAX; // TODO: take this line out when we support partial indexing
|
|
if (line == UINT32_MAX) {
|
|
// Already done?
|
|
if (!m_offsets.empty() && m_offsets[0] == UINT32_MAX)
|
|
return true;
|
|
|
|
if (m_offsets.empty()) {
|
|
if (m_data_sp.get() == nullptr)
|
|
return false;
|
|
|
|
const char *start = (char *)m_data_sp->GetBytes();
|
|
if (start) {
|
|
const char *end = start + m_data_sp->GetByteSize();
|
|
|
|
// Calculate all line offsets from scratch
|
|
|
|
// Push a 1 at index zero to indicate the file has been completely
|
|
// indexed.
|
|
m_offsets.push_back(UINT32_MAX);
|
|
const char *s;
|
|
for (s = start; s < end; ++s) {
|
|
char curr_ch = *s;
|
|
if (is_newline_char(curr_ch)) {
|
|
if (s + 1 < end) {
|
|
char next_ch = s[1];
|
|
if (is_newline_char(next_ch)) {
|
|
if (curr_ch != next_ch)
|
|
++s;
|
|
}
|
|
}
|
|
m_offsets.push_back(s + 1 - start);
|
|
}
|
|
}
|
|
if (!m_offsets.empty()) {
|
|
if (m_offsets.back() < size_t(end - start))
|
|
m_offsets.push_back(end - start);
|
|
}
|
|
return true;
|
|
}
|
|
} else {
|
|
// Some lines have been populated, start where we last left off
|
|
assert("Not implemented yet" && false);
|
|
}
|
|
|
|
} else {
|
|
// Calculate all line offsets up to "line"
|
|
assert("Not implemented yet" && false);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool SourceManager::File::GetLine(uint32_t line_no, std::string &buffer) {
|
|
if (!LineIsValid(line_no))
|
|
return false;
|
|
|
|
size_t start_offset = GetLineOffset(line_no);
|
|
size_t end_offset = GetLineOffset(line_no + 1);
|
|
if (end_offset == UINT32_MAX) {
|
|
end_offset = m_data_sp->GetByteSize();
|
|
}
|
|
buffer.assign((char *)m_data_sp->GetBytes() + start_offset,
|
|
end_offset - start_offset);
|
|
|
|
return true;
|
|
}
|
|
|
|
void SourceManager::SourceFileCache::AddSourceFile(const FileSP &file_sp) {
|
|
FileSpec file_spec;
|
|
FileCache::iterator pos = m_file_cache.find(file_spec);
|
|
if (pos == m_file_cache.end())
|
|
m_file_cache[file_spec] = file_sp;
|
|
else {
|
|
if (file_sp != pos->second)
|
|
m_file_cache[file_spec] = file_sp;
|
|
}
|
|
}
|
|
|
|
SourceManager::FileSP SourceManager::SourceFileCache::FindSourceFile(
|
|
const FileSpec &file_spec) const {
|
|
FileSP file_sp;
|
|
FileCache::const_iterator pos = m_file_cache.find(file_spec);
|
|
if (pos != m_file_cache.end())
|
|
file_sp = pos->second;
|
|
return file_sp;
|
|
}
|