1 // Copyright 2021 The Chromium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "base/profiler/chrome_unwind_info_android_32.h"
6
7 #include "base/containers/buffer_iterator.h"
8
9 namespace base {
10
ChromeUnwindInfoAndroid32(span<const uint8_t> unwind_instruction_table,span<const uint8_t> function_offset_table,span<const FunctionTableEntry> function_table,span<const uint32_t> page_table)11 ChromeUnwindInfoAndroid32::ChromeUnwindInfoAndroid32(
12 span<const uint8_t> unwind_instruction_table,
13 span<const uint8_t> function_offset_table,
14 span<const FunctionTableEntry> function_table,
15 span<const uint32_t> page_table)
16 : unwind_instruction_table(unwind_instruction_table),
17 function_offset_table(function_offset_table),
18 function_table(function_table),
19 page_table(page_table) {}
20
21 ChromeUnwindInfoAndroid32::~ChromeUnwindInfoAndroid32() = default;
22 ChromeUnwindInfoAndroid32::ChromeUnwindInfoAndroid32(
23 const ChromeUnwindInfoAndroid32& other) = default;
24 ChromeUnwindInfoAndroid32& ChromeUnwindInfoAndroid32::operator=(
25 const ChromeUnwindInfoAndroid32& other) = default;
26
27 ChromeUnwindInfoAndroid32::ChromeUnwindInfoAndroid32(
28 ChromeUnwindInfoAndroid32&& other) = default;
29 ChromeUnwindInfoAndroid32& ChromeUnwindInfoAndroid32::operator=(
30 ChromeUnwindInfoAndroid32&& other) = default;
31
CreateChromeUnwindInfoAndroid32(span<const uint8_t> data)32 ChromeUnwindInfoAndroid32 CreateChromeUnwindInfoAndroid32(
33 span<const uint8_t> data) {
34 BufferIterator<const uint8_t> data_iterator(data);
35
36 const auto* header = data_iterator.Object<ChromeUnwindInfoAndroid32Header>();
37 DCHECK(header);
38
39 data_iterator.Seek(header->page_table_byte_offset);
40 const auto page_table =
41 data_iterator.Span<uint32_t>(header->page_table_entries);
42 DCHECK(!page_table.empty());
43
44 data_iterator.Seek(header->function_offset_table_byte_offset);
45 const auto function_offset_table =
46 data_iterator.Span<uint8_t>(header->function_offset_table_size_in_bytes);
47 DCHECK(!function_offset_table.empty());
48
49 data_iterator.Seek(header->function_table_byte_offset);
50 const auto function_table =
51 data_iterator.Span<FunctionTableEntry>(header->function_table_entries);
52 DCHECK(!function_table.empty());
53
54 data_iterator.Seek(header->unwind_instruction_table_byte_offset);
55 const auto unwind_instruction_table = data_iterator.Span<uint8_t>(
56 header->unwind_instruction_table_size_in_bytes);
57 DCHECK(!unwind_instruction_table.empty());
58
59 return ChromeUnwindInfoAndroid32{unwind_instruction_table,
60 function_offset_table, function_table,
61 page_table};
62 }
63
64 } // namespace base
65