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llvm-project/lldb/source/Symbol/LineEntry.cpp

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//===-- LineEntry.cpp -----------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "lldb/Symbol/LineEntry.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Target.h"
using namespace lldb_private;
LineEntry::LineEntry()
: range(), file(), line(LLDB_INVALID_LINE_NUMBER), column(0),
is_start_of_statement(0), is_start_of_basic_block(0), is_prologue_end(0),
is_epilogue_begin(0), is_terminal_entry(0) {}
LineEntry::LineEntry(const lldb::SectionSP &section_sp,
lldb::addr_t section_offset, lldb::addr_t byte_size,
const FileSpec &_file, uint32_t _line, uint16_t _column,
bool _is_start_of_statement, bool _is_start_of_basic_block,
bool _is_prologue_end, bool _is_epilogue_begin,
bool _is_terminal_entry)
: range(section_sp, section_offset, byte_size), file(_file),
original_file(_file), line(_line), column(_column),
is_start_of_statement(_is_start_of_statement),
is_start_of_basic_block(_is_start_of_basic_block),
is_prologue_end(_is_prologue_end), is_epilogue_begin(_is_epilogue_begin),
is_terminal_entry(_is_terminal_entry) {}
void LineEntry::Clear() {
range.Clear();
file.Clear();
original_file.Clear();
line = LLDB_INVALID_LINE_NUMBER;
column = 0;
is_start_of_statement = 0;
is_start_of_basic_block = 0;
is_prologue_end = 0;
is_epilogue_begin = 0;
is_terminal_entry = 0;
}
bool LineEntry::IsValid() const {
return range.GetBaseAddress().IsValid() && line != LLDB_INVALID_LINE_NUMBER;
}
bool LineEntry::DumpStopContext(Stream *s, bool show_fullpaths) const {
if (file) {
if (show_fullpaths)
file.Dump(s->AsRawOstream());
else
file.GetFilename().Dump(s);
if (line)
s->PutChar(':');
}
if (line) {
s->Printf("%u", line);
if (column) {
s->PutChar(':');
s->Printf("%u", column);
}
}
return file || line;
}
bool LineEntry::Dump(Stream *s, Target *target, bool show_file,
Address::DumpStyle style,
Address::DumpStyle fallback_style, bool show_range) const {
if (show_range) {
// Show address range
if (!range.Dump(s, target, style, fallback_style))
return false;
} else {
// Show address only
if (!range.GetBaseAddress().Dump(s, target, style, fallback_style))
return false;
}
if (show_file)
*s << ", file = " << file;
if (line)
s->Printf(", line = %u", line);
if (column)
s->Printf(", column = %u", column);
if (is_start_of_statement)
*s << ", is_start_of_statement = TRUE";
if (is_start_of_basic_block)
*s << ", is_start_of_basic_block = TRUE";
if (is_prologue_end)
*s << ", is_prologue_end = TRUE";
if (is_epilogue_begin)
*s << ", is_epilogue_begin = TRUE";
if (is_terminal_entry)
*s << ", is_terminal_entry = TRUE";
return true;
}
bool LineEntry::GetDescription(Stream *s, lldb::DescriptionLevel level,
CompileUnit *cu, Target *target,
bool show_address_only) const {
if (level == lldb::eDescriptionLevelBrief ||
level == lldb::eDescriptionLevelFull) {
if (show_address_only) {
range.GetBaseAddress().Dump(s, target, Address::DumpStyleLoadAddress,
Address::DumpStyleFileAddress);
} else {
range.Dump(s, target, Address::DumpStyleLoadAddress,
Address::DumpStyleFileAddress);
}
*s << ": " << file;
if (line) {
s->Printf(":%u", line);
if (column)
s->Printf(":%u", column);
}
if (level == lldb::eDescriptionLevelFull) {
if (is_start_of_statement)
*s << ", is_start_of_statement = TRUE";
if (is_start_of_basic_block)
*s << ", is_start_of_basic_block = TRUE";
if (is_prologue_end)
*s << ", is_prologue_end = TRUE";
if (is_epilogue_begin)
*s << ", is_epilogue_begin = TRUE";
if (is_terminal_entry)
*s << ", is_terminal_entry = TRUE";
} else {
if (is_terminal_entry)
s->EOL();
}
} else {
return Dump(s, target, true, Address::DumpStyleLoadAddress,
Address::DumpStyleModuleWithFileAddress, true);
}
return true;
}
bool lldb_private::operator<(const LineEntry &a, const LineEntry &b) {
return LineEntry::Compare(a, b) < 0;
}
int LineEntry::Compare(const LineEntry &a, const LineEntry &b) {
int result = Address::CompareFileAddress(a.range.GetBaseAddress(),
b.range.GetBaseAddress());
if (result != 0)
return result;
const lldb::addr_t a_byte_size = a.range.GetByteSize();
const lldb::addr_t b_byte_size = b.range.GetByteSize();
if (a_byte_size < b_byte_size)
return -1;
if (a_byte_size > b_byte_size)
return +1;
// Check for an end sequence entry mismatch after we have determined that the
// address values are equal. If one of the items is an end sequence, we don't
// care about the line, file, or column info.
if (a.is_terminal_entry > b.is_terminal_entry)
return -1;
if (a.is_terminal_entry < b.is_terminal_entry)
return +1;
if (a.line < b.line)
return -1;
if (a.line > b.line)
return +1;
if (a.column < b.column)
return -1;
if (a.column > b.column)
return +1;
return FileSpec::Compare(a.file, b.file, true);
}
AddressRange LineEntry::GetSameLineContiguousAddressRange(
bool include_inlined_functions) const {
// Add each LineEntry's range to complete_line_range until we find a
// different file / line number.
AddressRange complete_line_range = range;
auto symbol_context_scope = lldb::eSymbolContextLineEntry;
Declaration start_call_site(original_file, line);
if (include_inlined_functions)
symbol_context_scope |= lldb::eSymbolContextBlock;
while (true) {
SymbolContext next_line_sc;
Address range_end(complete_line_range.GetBaseAddress());
range_end.Slide(complete_line_range.GetByteSize());
range_end.CalculateSymbolContext(&next_line_sc, symbol_context_scope);
if (!next_line_sc.line_entry.IsValid() ||
next_line_sc.line_entry.range.GetByteSize() == 0)
break;
if (original_file == next_line_sc.line_entry.original_file &&
(next_line_sc.line_entry.line == 0 ||
line == next_line_sc.line_entry.line)) {
// Include any line 0 entries - they indicate that this is compiler-
// generated code that does not correspond to user source code.
// next_line_sc is the same file & line as this LineEntry, so extend
// our AddressRange by its size and continue to see if there are more
// LineEntries that we can combine. However, if there was nothing to
// extend we're done.
if (!complete_line_range.Extend(next_line_sc.line_entry.range))
break;
continue;
}
if (include_inlined_functions && next_line_sc.block &&
next_line_sc.block->GetContainingInlinedBlock() != nullptr) {
// The next_line_sc might be in a different file if it's an inlined
// function. If this is the case then we still want to expand our line
// range to include them if the inlined function is at the same call site
// as this line entry. The current block could represent a nested inline
// function call so we need to need to check up the block tree to see if
// we find one.
auto inlined_parent_block =
next_line_sc.block->GetContainingInlinedBlockWithCallSite(
start_call_site);
if (!inlined_parent_block)
// We didn't find any parent inlined block with a call site at this line
// entry so this inlined function is probably at another line.
break;
// Extend our AddressRange by the size of the inlined block, but if there
// was nothing to add then we're done.
if (!complete_line_range.Extend(next_line_sc.line_entry.range))
break;
continue;
}
break;
}
return complete_line_range;
}
void LineEntry::ApplyFileMappings(lldb::TargetSP target_sp) {
if (target_sp) {
// Apply any file remappings to our file
FileSpec new_file_spec;
if (target_sp->GetSourcePathMap().FindFile(original_file, new_file_spec))
file = new_file_spec;
}
}
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