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https://github.com/yuzu-emu/breakpad
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Fix parsing .debug_rnglists section
Change-Id: I1bab1517c04684b8251984498eb0d43e1505fd30 Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/2888265 Reviewed-by: Sterling Augustine <saugustine@google.com> Reviewed-by: Joshua Peraza <jperaza@chromium.org>
This commit is contained in:
Zequan Wu
Joshua Peraza
parent
5c4b5d89e4
commit
13ba5a1549
3 changed files with 217 additions and 100 deletions
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@ -1776,54 +1776,6 @@ void LineInfo::ReadLines() {
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after_header_ = lengthstart + header_.total_length;
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}
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bool RangeListReader::SetRangesBase(uint64_t offset) {
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// Versions less than 5 don't use ranges base.
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if (cu_info_->version_ < 5) {
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return true;
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}
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// Length may not be 12 bytes, but if 12 bytes aren't available
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// at this point, then the header is too short.
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if (offset + 12 >= cu_info_->size_) {
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return false;
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}
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// The length of this CU's contribution.
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uint64_t cu_length = reader_->ReadFourBytes(cu_info_->buffer_ + offset);
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offset += 4;
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if (cu_length == 0xffffffffUL) {
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cu_length = reader_->ReadEightBytes(cu_info_->buffer_ + offset);
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offset += 8;
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}
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// Truncating size here results in correctly ignoring everything not from
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// this cu from here on out.
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cu_info_->size_ = offset + cu_length;
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// Check for the rest of the header in advance.
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if (offset + 8 >= cu_info_->size_) {
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return false;
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}
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// Version. Can only read version 5.
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if (reader_->ReadTwoBytes(cu_info_->buffer_ + offset) != 5) {
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return false;
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}
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offset += 2;
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// Address size
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if (reader_->ReadOneByte(cu_info_->buffer_ + offset) !=
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reader_->AddressSize()) {
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return false;
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}
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offset += 1;
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// Segment selectors are unsupported
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if (reader_->ReadOneByte(cu_info_->buffer_ + offset) != 0) {
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return false;
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}
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offset += 1;
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offset_entry_count_ = reader_->ReadFourBytes(cu_info_->buffer_ + offset);
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offset += 4;
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offset_array_ = offset;
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return true;
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}
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bool RangeListReader::ReadRanges(enum DwarfForm form, uint64_t data) {
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if (form == DW_FORM_sec_offset) {
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if (cu_info_->version_ <= 4) {
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@ -1832,15 +1784,12 @@ bool RangeListReader::ReadRanges(enum DwarfForm form, uint64_t data) {
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return ReadDebugRngList(data);
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}
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} else if (form == DW_FORM_rnglistx) {
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SetRangesBase(cu_info_->ranges_base_);
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if (data >= offset_entry_count_) {
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return false;
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}
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offset_array_ = cu_info_->ranges_base_;
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uint64_t index_offset = reader_->AddressSize() * data;
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uint64_t range_list_offset =
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reader_->ReadAddress(cu_info_->buffer_ + offset_array_ + index_offset);
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reader_->ReadOffset(cu_info_->buffer_ + offset_array_ + index_offset);
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return ReadDebugRngList(range_list_offset);
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return ReadDebugRngList(offset_array_ + range_list_offset);
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}
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return false;
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}
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@ -277,14 +277,12 @@ class RangeListReader {
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RangeListReader(ByteReader* reader, CURangesInfo* cu_info,
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RangeListHandler* handler) :
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reader_(reader), cu_info_(cu_info), handler_(handler),
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offset_array_(0), offset_entry_count_(0) { }
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offset_array_(0) { }
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// Read ranges from cu_info as specified by form and data.
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bool ReadRanges(enum DwarfForm form, uint64_t data);
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private:
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bool SetRangesBase(uint64_t base);
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// Read dwarf4 .debug_ranges at offset.
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bool ReadDebugRanges(uint64_t offset);
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// Read dwarf5 .debug_rngslist at offset.
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@ -316,7 +314,6 @@ class RangeListReader {
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CURangesInfo* cu_info_;
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RangeListHandler* handler_;
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uint64_t offset_array_;
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uint64_t offset_entry_count_;
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};
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// This class is the main interface between the reader and the
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@ -698,7 +698,7 @@ TEST(RangeList, Dwarf4ReadRangeList) {
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section_offset));
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}
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TEST(RangeList, Dwarf5ReadRangeList) {
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TEST(RangeList, Dwarf5ReadRangeList_rnglists) {
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using dwarf2reader::RangeListReader;
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using dwarf2reader::DW_RLE_base_addressx;
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using dwarf2reader::DW_RLE_startx_endx;
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@ -706,13 +706,16 @@ TEST(RangeList, Dwarf5ReadRangeList) {
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using dwarf2reader::DW_RLE_offset_pair;
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using dwarf2reader::DW_RLE_end_of_list;
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using dwarf2reader::DW_RLE_base_address;
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using dwarf2reader::DW_RLE_offset_pair;
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using dwarf2reader::DW_RLE_start_end;
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using dwarf2reader::DW_RLE_start_length;
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using dwarf2reader::DW_RLE_end_of_list;
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using dwarf2reader::DW_FORM_sec_offset;
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using dwarf2reader::DW_FORM_rnglistx;
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// Size of header
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const uint64_t header_size = 12;
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// Size of length field in header
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const uint64_t length_size = 4;
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// .debug_addr for the indexed entries like startx.
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Section addr;
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addr.set_endianness(kBigEndian);
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@ -722,49 +725,83 @@ TEST(RangeList, Dwarf5ReadRangeList) {
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assert(addr.GetContents(&addr_contents));
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// .debug_rnglists is the dwarf 5 section.
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Section rnglists;
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rnglists.set_endianness(kBigEndian);
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std::string padding_offset = "padding offset";
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rnglists.Append(padding_offset);
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const uint64_t ranges_base = rnglists.Size();
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Section rnglists1(kBigEndian);
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Section rnglists2(kBigEndian);
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// First header and body.
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Label section_size1;
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rnglists1.Append(kBigEndian, length_size, section_size1);
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rnglists1.D16(5); // Version
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rnglists1.D8(4); // Address size
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rnglists1.D8(0); // Segment selector size
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rnglists1.D32(2); // Offset entry count
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const uint64_t ranges_base_1 = rnglists1.Size();
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// Header
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Label section_size;
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rnglists.Append(kBigEndian, 4, section_size);
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rnglists.D16(5); // Version
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rnglists.D8(4); // Address size
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rnglists.D8(0); // Segment selector size
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rnglists.D32(2); // Offset entry count
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// Offset entries.
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Label range0;
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rnglists.Append(kBigEndian, 4, range0);
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rnglists1.Append(kBigEndian, 4, range0);
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Label range1;
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rnglists.Append(kBigEndian, 4, range1);
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rnglists1.Append(kBigEndian, 4, range1);
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// Range 0 (will be read via DW_AT_ranges, DW_FORM_sec_offset).
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range0 = rnglists.Size();
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rnglists.D8(DW_RLE_base_addressx).ULEB128(0); // base_addr = 1
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rnglists.D8(DW_RLE_startx_endx).ULEB128(1).ULEB128(2); // (2, 3)
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rnglists.D8(DW_RLE_startx_length).ULEB128(3).ULEB128(1); // (4, 5)
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rnglists.D8(DW_RLE_offset_pair).ULEB128(5).ULEB128(6); // (6, 7)
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rnglists.D8(DW_RLE_end_of_list);
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// Range 0 (will be read via DW_AT_ranges, DW_FORM_rnglistx).
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range0 = rnglists1.Size() - header_size;
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rnglists1.D8(DW_RLE_base_addressx).ULEB128(0); // base_addr = 1
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rnglists1.D8(DW_RLE_startx_endx).ULEB128(1).ULEB128(2); // [2, 3)
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rnglists1.D8(DW_RLE_startx_length).ULEB128(3).ULEB128(1); // [4, 5)
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rnglists1.D8(DW_RLE_offset_pair).ULEB128(5).ULEB128(6); // [6, 7)
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rnglists1.D8(DW_RLE_end_of_list);
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// Range 1 (will be read via DW_AT_ranges, DW_FORM_rnglistx).
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range1 = rnglists.Size();
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rnglists.D8(DW_RLE_base_address).D32(8); // base_addr = 8
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rnglists.D8(DW_RLE_offset_pair).ULEB128(1).ULEB128(2); // (9, 10)
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rnglists.D8(DW_RLE_start_end).D32(10).D32(11); // (10, 11)
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rnglists.D8(DW_RLE_start_length).D32(12).ULEB128(1); // (12, 13)
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rnglists.D8(DW_RLE_end_of_list);
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section_size = rnglists.Size();
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std::string rnglists_contents;
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assert(rnglists.GetContents(&rnglists_contents));
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range1 = rnglists1.Size() - header_size;
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rnglists1.D8(DW_RLE_base_address).D32(8); // base_addr = 8
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rnglists1.D8(DW_RLE_offset_pair).ULEB128(1).ULEB128(2); // [9, 10)
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rnglists1.D8(DW_RLE_start_end).D32(10).D32(11); // [10, 11)
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rnglists1.D8(DW_RLE_start_length).D32(12).ULEB128(1); // [12, 13)
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rnglists1.D8(DW_RLE_end_of_list);
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// The size doesn't include the size of length field itself.
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section_size1 = rnglists1.Size() - length_size;
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// Second header and body.
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Label section_size2;
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rnglists2.Append(kBigEndian, length_size, section_size2);
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rnglists2.D16(5); // Version
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rnglists2.D8(4); // Address size
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rnglists2.D8(0); // Segment selector size
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rnglists2.D32(2); // Offset entry count
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const uint64_t ranges_base_2 = rnglists1.Size() + rnglists2.Size();
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// Offset entries.
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Label range2;
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rnglists2.Append(kBigEndian, 4, range2);
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Label range3;
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rnglists2.Append(kBigEndian, 4, range3);
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// Range 2 (will be read via DW_AT_ranges, DW_FORM_sec_offset).
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range2 = rnglists2.Size() - header_size;
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rnglists2.D8(DW_RLE_base_addressx).ULEB128(0); // base_addr = 1
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rnglists2.D8(DW_RLE_startx_endx).ULEB128(1).ULEB128(2); // [2, 3)
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rnglists2.D8(DW_RLE_startx_length).ULEB128(3).ULEB128(1); // [4, 5)
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rnglists2.D8(DW_RLE_offset_pair).ULEB128(5).ULEB128(6); // [6, 7)
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rnglists2.D8(DW_RLE_end_of_list);
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// Range 3 (will be read via DW_AT_ranges, DW_FORM_rnglistx).
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range3 = rnglists2.Size() - header_size;
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rnglists2.D8(DW_RLE_base_address).D32(15); // base_addr = 15
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rnglists2.D8(DW_RLE_offset_pair).ULEB128(1).ULEB128(2); // [16, 17)
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rnglists2.D8(DW_RLE_start_end).D32(17).D32(18); // [17, 18)
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rnglists2.D8(DW_RLE_start_length).D32(19).ULEB128(1); // [19, 20)
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rnglists2.D8(DW_RLE_end_of_list);
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// The size doesn't include the size of length field itself.
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section_size2 = rnglists2.Size() - length_size;
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rnglists1.Append(rnglists2);
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string rnglists_contents;
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assert(rnglists1.GetContents(&rnglists_contents));
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RangeListReader::CURangesInfo cu_info;
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// Only set the fields that matter for dwarf 4.
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cu_info.version_ = 5;
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cu_info.base_address_ = 1;
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cu_info.ranges_base_ = ranges_base;
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cu_info.ranges_base_ = ranges_base_1;
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cu_info.buffer_ =
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reinterpret_cast<const uint8_t*>(rnglists_contents.data());
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cu_info.size_ = rnglists_contents.size();
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@ -772,12 +809,13 @@ TEST(RangeList, Dwarf5ReadRangeList) {
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reinterpret_cast<const uint8_t*>(addr_contents.data());
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cu_info.addr_buffer_size_ = addr_contents.size();
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cu_info.addr_base_ = 4;
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ByteReader byte_reader(ENDIANNESS_BIG);
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byte_reader.SetOffsetSize(4);
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byte_reader.SetAddressSize(4);
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MockRangeListHandler handler;
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dwarf2reader::RangeListReader range_list_reader(&byte_reader, &cu_info,
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&handler);
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dwarf2reader::RangeListReader range_list_reader1(&byte_reader, &cu_info,
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&handler);
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EXPECT_CALL(handler, AddRange(2, 3));
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EXPECT_CALL(handler, AddRange(4, 5));
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EXPECT_CALL(handler, AddRange(6, 7));
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@ -785,9 +823,142 @@ TEST(RangeList, Dwarf5ReadRangeList) {
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EXPECT_CALL(handler, AddRange(10, 11));
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EXPECT_CALL(handler, AddRange(12, 13));
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EXPECT_CALL(handler, Finish()).Times(2);
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EXPECT_TRUE(range_list_reader.ReadRanges(DW_FORM_rnglistx, 1));
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EXPECT_TRUE(range_list_reader.ReadRanges(DW_FORM_sec_offset,
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range0.Value()));
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EXPECT_TRUE(range_list_reader1.ReadRanges(DW_FORM_rnglistx, 0));
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EXPECT_TRUE(range_list_reader1.ReadRanges(DW_FORM_rnglistx, 1));
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// Out of range index, should result in no calls.
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EXPECT_FALSE(range_list_reader.ReadRanges(DW_FORM_rnglistx, 2));
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EXPECT_FALSE(range_list_reader1.ReadRanges(DW_FORM_rnglistx, 2));
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// Set to new ranges_base
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cu_info.ranges_base_ = ranges_base_2;
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dwarf2reader::RangeListReader range_list_reader2(&byte_reader, &cu_info,
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&handler);
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EXPECT_CALL(handler, AddRange(2, 3));
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EXPECT_CALL(handler, AddRange(4, 5));
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EXPECT_CALL(handler, AddRange(6, 7));
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EXPECT_CALL(handler, AddRange(16, 17));
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EXPECT_CALL(handler, AddRange(17, 18));
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EXPECT_CALL(handler, AddRange(19, 20));
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EXPECT_CALL(handler, Finish()).Times(2);
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EXPECT_TRUE(range_list_reader2.ReadRanges(DW_FORM_rnglistx, 0));
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EXPECT_TRUE(range_list_reader2.ReadRanges(DW_FORM_rnglistx, 1));
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// Out of range index, should result in no calls.
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EXPECT_FALSE(range_list_reader2.ReadRanges(DW_FORM_rnglistx, 2));
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}
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TEST(RangeList, Dwarf5ReadRangeList_sec_offset) {
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using dwarf2reader::RangeListReader;
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using dwarf2reader::DW_RLE_base_addressx;
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using dwarf2reader::DW_RLE_startx_endx;
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using dwarf2reader::DW_RLE_startx_length;
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using dwarf2reader::DW_RLE_offset_pair;
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using dwarf2reader::DW_RLE_end_of_list;
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using dwarf2reader::DW_RLE_base_address;
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using dwarf2reader::DW_RLE_start_end;
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using dwarf2reader::DW_RLE_start_length;
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using dwarf2reader::DW_FORM_sec_offset;
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using dwarf2reader::DW_FORM_rnglistx;
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// Size of length field in header
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const uint64_t length_size = 4;
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// .debug_addr for the indexed entries like startx.
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Section addr;
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addr.set_endianness(kBigEndian);
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// Test addr_base handling with a padding address at 0.
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addr.D32(0).D32(1).D32(2).D32(3).D32(4).D32(21).D32(22);
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std::string addr_contents;
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assert(addr.GetContents(&addr_contents));
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// .debug_rnglists is the dwarf 5 section.
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Section rnglists1(kBigEndian);
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Section rnglists2(kBigEndian);
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// First header and body.
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Label section_size1;
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rnglists1.Append(kBigEndian, length_size, section_size1);
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rnglists1.D16(5); // Version
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rnglists1.D8(4); // Address size
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rnglists1.D8(0); // Segment selector size
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rnglists1.D32(0); // Offset entry count
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const uint64_t offset1 = rnglists1.Size();
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rnglists1.D8(DW_RLE_base_addressx).ULEB128(0); // base_addr = 1
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rnglists1.D8(DW_RLE_startx_endx).ULEB128(1).ULEB128(2); // [2, 3)
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rnglists1.D8(DW_RLE_startx_length).ULEB128(3).ULEB128(1); // [4, 5)
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rnglists1.D8(DW_RLE_offset_pair).ULEB128(5).ULEB128(6); // [6, 7)
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rnglists1.D8(DW_RLE_base_address).D32(8); // base_addr = 8
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rnglists1.D8(DW_RLE_offset_pair).ULEB128(1).ULEB128(2); // [9, 10)
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rnglists1.D8(DW_RLE_start_end).D32(10).D32(11); // [10, 11)
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rnglists1.D8(DW_RLE_start_length).D32(12).ULEB128(1); // [12, 13)
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rnglists1.D8(DW_RLE_end_of_list);
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// The size doesn't include the size of length field itself.
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section_size1 = rnglists1.Size() - length_size;
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// Second header and body.
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Label section_size2;
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rnglists2.Append(kBigEndian, length_size, section_size2);
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rnglists2.D16(5); // Version
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rnglists2.D8(4); // Address size
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rnglists2.D8(0); // Segment selector size
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rnglists2.D32(0); // Offset entry count
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const uint64_t offset2 = rnglists1.Size() + rnglists2.Size();
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rnglists2.D8(DW_RLE_base_addressx).ULEB128(0); // base_addr = 1
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rnglists2.D8(DW_RLE_startx_endx).ULEB128(1).ULEB128(2); // [2, 3)
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rnglists2.D8(DW_RLE_startx_length).ULEB128(3).ULEB128(1); // [4, 5)
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rnglists2.D8(DW_RLE_offset_pair).ULEB128(5).ULEB128(6); // [6, 7)
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rnglists2.D8(DW_RLE_base_address).D32(15); // base_addr = 15
|
||||
rnglists2.D8(DW_RLE_offset_pair).ULEB128(1).ULEB128(2); // [16, 17)
|
||||
rnglists2.D8(DW_RLE_start_end).D32(17).D32(18); // [17, 18)
|
||||
rnglists2.D8(DW_RLE_start_length).D32(19).ULEB128(1); // [19, 20)
|
||||
rnglists2.D8(DW_RLE_end_of_list);
|
||||
// The size doesn't include the size of length field itself.
|
||||
section_size2 = rnglists2.Size() - length_size;
|
||||
|
||||
rnglists1.Append(rnglists2);
|
||||
string rnglists_contents;
|
||||
assert(rnglists1.GetContents(&rnglists_contents));
|
||||
|
||||
RangeListReader::CURangesInfo cu_info;
|
||||
cu_info.version_ = 5;
|
||||
cu_info.base_address_ = 1;
|
||||
cu_info.buffer_ =
|
||||
reinterpret_cast<const uint8_t*>(rnglists_contents.data());
|
||||
cu_info.size_ = rnglists_contents.size();
|
||||
cu_info.addr_buffer_ =
|
||||
reinterpret_cast<const uint8_t*>(addr_contents.data());
|
||||
cu_info.addr_buffer_size_ = addr_contents.size();
|
||||
cu_info.addr_base_ = 4;
|
||||
|
||||
ByteReader byte_reader(ENDIANNESS_BIG);
|
||||
byte_reader.SetOffsetSize(4);
|
||||
byte_reader.SetAddressSize(4);
|
||||
MockRangeListHandler handler;
|
||||
dwarf2reader::RangeListReader range_list_reader(&byte_reader, &cu_info,
|
||||
&handler);
|
||||
EXPECT_CALL(handler, AddRange(2, 3));
|
||||
EXPECT_CALL(handler, AddRange(4, 5));
|
||||
EXPECT_CALL(handler, AddRange(6, 7));
|
||||
EXPECT_CALL(handler, AddRange(9, 10));
|
||||
EXPECT_CALL(handler, AddRange(10, 11));
|
||||
EXPECT_CALL(handler, AddRange(12, 13));
|
||||
EXPECT_CALL(handler, Finish()).Times(1);
|
||||
EXPECT_TRUE(range_list_reader.ReadRanges(DW_FORM_sec_offset, offset1));
|
||||
// Out of range index, should result in no calls.
|
||||
EXPECT_FALSE(range_list_reader.ReadRanges(DW_FORM_sec_offset,
|
||||
rnglists_contents.size()));
|
||||
|
||||
EXPECT_CALL(handler, AddRange(2, 3));
|
||||
EXPECT_CALL(handler, AddRange(4, 5));
|
||||
EXPECT_CALL(handler, AddRange(6, 7));
|
||||
EXPECT_CALL(handler, AddRange(16, 17));
|
||||
EXPECT_CALL(handler, AddRange(17, 18));
|
||||
EXPECT_CALL(handler, AddRange(19, 20));
|
||||
EXPECT_CALL(handler, Finish()).Times(1);
|
||||
EXPECT_TRUE(range_list_reader.ReadRanges(DW_FORM_sec_offset, offset2));
|
||||
// Out of range index, should result in no calls.
|
||||
EXPECT_FALSE(range_list_reader.ReadRanges(DW_FORM_sec_offset,
|
||||
rnglists_contents.size()));
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue