1 files changed, 151 insertions, 0 deletions
diff --git a/externals/breakpad/src/client/linux/minidump_writer/pe_file.cc b/externals/breakpad/src/client/linux/minidump_writer/pe_file.cc
new file mode 100644
index 0000000000..7b3fe6c087
--- /dev/null
+++ b/externals/breakpad/src/client/linux/minidump_writer/pe_file.cc
@@ -0,0 +1,151 @@
+// Copyright 2022 Google LLC
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google LLC nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>  // Must come first
+#endif
+
+#include <string.h>
+
+#include "client/linux/minidump_writer/pe_file.h"
+#include "client/linux/minidump_writer/pe_structs.h"
+#include "common/linux/memory_mapped_file.h"
+
+namespace google_breakpad {
+
+PEFileFormat PEFile::TryGetDebugInfo(const char* filename,
+                                      PRSDS_DEBUG_FORMAT debug_info) {
+  MemoryMappedFile mapped_file(filename, 0);
+  if (!mapped_file.data())
+    return PEFileFormat::notPeCoff;
+  const void* base = mapped_file.data();
+  const size_t file_size = mapped_file.size();
+
+  const IMAGE_DOS_HEADER* header =
+      TryReadStruct<IMAGE_DOS_HEADER>(base, 0, file_size);
+  if (!header || (header->e_magic != IMAGE_DOS_SIGNATURE)) {
+    return PEFileFormat::notPeCoff;
+  }
+
+  // NTHeader is at position 'e_lfanew'.
+  DWORD nt_header_offset = header->e_lfanew;
+  // First, read a common IMAGE_NT_HEADERS structure. It should contain a
+  // special flag marking whether PE module is x64 (OptionalHeader.Magic)
+  // and so-called NT_SIGNATURE in Signature field.
+  const IMAGE_NT_HEADERS* nt_header =
+      TryReadStruct<IMAGE_NT_HEADERS>(base, nt_header_offset, file_size);
+  if (!nt_header || (nt_header->Signature != IMAGE_NT_SIGNATURE)
+     || ((nt_header->OptionalHeader.Magic != IMAGE_NT_OPTIONAL_HDR64_MAGIC)
+     &&  (nt_header->OptionalHeader.Magic != IMAGE_NT_OPTIONAL_HDR32_MAGIC)))
+    return PEFileFormat::notPeCoff;
+
+  bool x64 = nt_header->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR64_MAGIC;
+  WORD sections_number = nt_header->FileHeader.NumberOfSections;
+  DWORD debug_offset;
+  DWORD debug_size;
+  DWORD section_offset;
+  if (x64) {
+    const IMAGE_NT_HEADERS64* header_64 =
+        TryReadStruct<IMAGE_NT_HEADERS64>(base, nt_header_offset, file_size);
+    if (!header_64)
+      return PEFileFormat::peWithoutBuildId;
+    debug_offset =
+        header_64->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG]
+            .VirtualAddress;
+    debug_size =
+        header_64->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG]
+            .Size;
+    section_offset = nt_header_offset + sizeof(IMAGE_NT_HEADERS64);
+  } else {
+    const IMAGE_NT_HEADERS32* header_32 =
+        TryReadStruct<IMAGE_NT_HEADERS32>(base, nt_header_offset, file_size);
+    if (!header_32)
+      return PEFileFormat::peWithoutBuildId;
+    debug_offset =
+        header_32->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG]
+            .VirtualAddress;
+    debug_size =
+        header_32->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG]
+            .Size;
+    section_offset = nt_header_offset + sizeof(IMAGE_NT_HEADERS32);
+  }
+
+  DWORD debug_end_pos = debug_offset + debug_size;
+  while (debug_offset < debug_end_pos) {
+    for (WORD i = 0; i < sections_number; ++i) {
+      // Section headers are placed sequentially after the NT_HEADER (32/64).
+      const IMAGE_SECTION_HEADER* section =
+          TryReadStruct<IMAGE_SECTION_HEADER>(base, section_offset, file_size);
+      if (!section)
+        return PEFileFormat::peWithoutBuildId;
+
+      section_offset += sizeof(IMAGE_SECTION_HEADER);
+
+      // Current `debug_offset` should be inside a section, stop if we find
+      // a suitable one (we don't consider any malformed sections here).
+      if ((section->VirtualAddress <= debug_offset) &&
+          (debug_offset < section->VirtualAddress + section->SizeOfRawData)) {
+        DWORD offset =
+            section->PointerToRawData + debug_offset - section->VirtualAddress;
+        // Go to the position of current ImageDebugDirectory (offset).
+        const IMAGE_DEBUG_DIRECTORY* debug_directory =
+            TryReadStruct<IMAGE_DEBUG_DIRECTORY>(base, offset, file_size);
+        if (!debug_directory)
+          return PEFileFormat::peWithoutBuildId;
+        // Process ImageDebugDirectory with CodeViewRecord type and skip
+        // all others.
+        if (debug_directory->Type == IMAGE_DEBUG_TYPE_CODEVIEW) {
+          DWORD debug_directory_size = debug_directory->SizeOfData;
+          if (debug_directory_size < sizeof(RSDS_DEBUG_FORMAT))
+            // RSDS section is malformed.
+            return PEFileFormat::peWithoutBuildId;
+          // Go to the position of current ImageDebugDirectory Raw Data
+          // (debug_directory->PointerToRawData) and read the RSDS section.
+          const RSDS_DEBUG_FORMAT* rsds =
+              TryReadStruct<RSDS_DEBUG_FORMAT>(
+                base, debug_directory->PointerToRawData, file_size);
+
+          if (!rsds)
+            return PEFileFormat::peWithoutBuildId;
+
+          memcpy(debug_info->guid, rsds->guid, sizeof(rsds->guid));
+          memcpy(debug_info->age, rsds->age, sizeof(rsds->age));
+          return PEFileFormat::peWithBuildId;
+        }
+
+        break;
+      }
+    }
+
+    debug_offset += sizeof(IMAGE_DEBUG_DIRECTORY);
+  }
+
+  return PEFileFormat::peWithoutBuildId;
+}
+
+} // namespace google_breakpad
+\ No newline at end of file