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Add support for dwarf5 line tables.

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Change-Id: I2c0cd0e7163502e52fbf0745b611befb2e219071
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/2276193
Reviewed-by: Sterling Augustine <saugustine@google.com>
This commit is contained in:
Sterling Augustine
2020-06-30 13:59:15 -07:00
parent b6f36dd775
commit a741027533
10 changed files with 509 additions and 64 deletions
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31
src/common/dwarf_cu_to_module.cc
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@@ -940,14 +940,35 @@ void DwarfCUToModule::ReadSourceLines(uint64_t offset) {
cu_context_->reporter->MissingSection(".debug_line");
return;
}
const uint8_t *section_start = map_entry->second.first;
uint64_t section_length = map_entry->second.second;
if (offset >= section_length) {
const uint8_t* line_section_start = map_entry->second.first + offset;
uint64_t line_section_length = map_entry->second.second;
if (offset >= line_section_length) {
cu_context_->reporter->BadLineInfoOffset(offset);
return;
}
line_reader_->ReadProgram(section_start + offset, section_length - offset,
cu_context_->file_context->module_, &lines_);
line_section_length -= offset;
// When reading line tables, string sections are never needed for dwarf4, and
// may or may not be needed by dwarf5, so no error if they are missing.
const uint8_t* string_section_start = nullptr;
uint64_t string_section_length = 0;
map_entry = dwarf2reader::GetSectionByName(section_map, ".debug_str");
if (map_entry != section_map.end()) {
string_section_start = map_entry->second.first + offset;
string_section_length = map_entry->second.second - offset;
}
const uint8_t* line_string_section_start = nullptr;
uint64_t line_string_section_length = 0;
map_entry = dwarf2reader::GetSectionByName(section_map, ".debug_line_str");
if (map_entry != section_map.end()) {
line_string_section_start = map_entry->second.first + offset;
line_string_section_length = map_entry->second.second - offset;
return;
}
line_reader_->ReadProgram(
line_section_start, line_section_length,
string_section_start, string_section_length,
line_string_section_start, line_string_section_length,
cu_context_->file_context->module_, &lines_);
}
namespace {