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-rw-r--r--src/common/windows/pdb_source_line_writer.cc192
-rw-r--r--src/common/windows/pdb_source_line_writer.h10
2 files changed, 201 insertions, 1 deletions
diff --git a/src/common/windows/pdb_source_line_writer.cc b/src/common/windows/pdb_source_line_writer.cc
index f39e33b5..5de7ade6 100644
--- a/src/common/windows/pdb_source_line_writer.cc
+++ b/src/common/windows/pdb_source_line_writer.cc
@@ -48,6 +48,53 @@
#define UNDNAME_NO_ECSU 0x8000 // Suppresses enum/class/struct/union.
#endif // UNDNAME_NO_ECSU
+/*
+ * Not defined in WinNT.h for some reason. Definitions taken from:
+ * http://uninformed.org/index.cgi?v=4&a=1&p=13
+ *
+ */
+typedef unsigned char UBYTE;
+#define UNW_FLAG_EHANDLER 0x01
+#define UNW_FLAG_UHANDLER 0x02
+#define UNW_FLAG_CHAININFO 0x04
+
+union UnwindCode {
+ struct {
+ UBYTE offset_in_prolog;
+ UBYTE unwind_operation_code : 4;
+ UBYTE operation_info : 4;
+ };
+ USHORT frame_offset;
+};
+
+enum UnwindOperationCodes {
+ UWOP_PUSH_NONVOL = 0, /* info == register number */
+ UWOP_ALLOC_LARGE, /* no info, alloc size in next 2 slots */
+ UWOP_ALLOC_SMALL, /* info == size of allocation / 8 - 1 */
+ UWOP_SET_FPREG, /* no info, FP = RSP + UNWIND_INFO.FPRegOffset*16 */
+ UWOP_SAVE_NONVOL, /* info == register number, offset in next slot */
+ UWOP_SAVE_NONVOL_FAR, /* info == register number, offset in next 2 slots */
+ //XXX: these are missing from MSDN!
+ // See: http://www.osronline.com/ddkx/kmarch/64bitamd_4rs7.htm
+ UWOP_SAVE_XMM,
+ UWOP_SAVE_XMM_FAR,
+ UWOP_SAVE_XMM128, /* info == XMM reg number, offset in next slot */
+ UWOP_SAVE_XMM128_FAR, /* info == XMM reg number, offset in next 2 slots */
+ UWOP_PUSH_MACHFRAME /* info == 0: no error-code, 1: error-code */
+};
+
+// See: http://msdn.microsoft.com/en-us/library/ddssxxy8.aspx
+// Note: some fields removed as we don't use them.
+struct UnwindInfo {
+ UBYTE version : 3;
+ UBYTE flags : 5;
+ UBYTE size_of_prolog;
+ UBYTE count_of_codes;
+ UBYTE frame_register : 4;
+ UBYTE frame_offset : 4;
+ UnwindCode unwind_code[1];
+};
+
namespace google_breakpad {
namespace {
@@ -383,7 +430,7 @@ bool PDBSourceLineWriter::PrintFunctions() {
return true;
}
-bool PDBSourceLineWriter::PrintFrameData() {
+bool PDBSourceLineWriter::PrintFrameDataUsingPDB() {
// It would be nice if it were possible to output frame data alongside the
// associated function, as is done with line numbers, but the DIA API
// doesn't make it possible to get the frame data in that way.
@@ -538,6 +585,149 @@ bool PDBSourceLineWriter::PrintFrameData() {
return true;
}
+bool PDBSourceLineWriter::PrintFrameDataUsingEXE() {
+ if (code_file_.empty() && !FindPEFile()) {
+ fprintf(stderr, "Couldn't locate EXE or DLL file.\n");
+ return false;
+ }
+
+ // Convert wchar to native charset because ImageLoad only takes
+ // a PSTR as input.
+ string code_file;
+ if (!WindowsStringUtils::safe_wcstombs(code_file_, &code_file)) {
+ return false;
+ }
+
+ AutoImage img(ImageLoad((PSTR)code_file.c_str(), NULL));
+ if (!img) {
+ fprintf(stderr, "Failed to load %s\n", code_file.c_str());
+ return false;
+ }
+ PIMAGE_OPTIONAL_HEADER64 optional_header =
+ &(reinterpret_cast<PIMAGE_NT_HEADERS64>(img->FileHeader))->OptionalHeader;
+ if (optional_header->Magic != IMAGE_NT_OPTIONAL_HDR64_MAGIC) {
+ fprintf(stderr, "Not a PE32+ image\n");
+ return false;
+ }
+
+ // Read Exception Directory
+ DWORD exception_rva = optional_header->
+ DataDirectory[IMAGE_DIRECTORY_ENTRY_EXCEPTION].VirtualAddress;
+ DWORD exception_size = optional_header->
+ DataDirectory[IMAGE_DIRECTORY_ENTRY_EXCEPTION].Size;
+ PIMAGE_RUNTIME_FUNCTION_ENTRY funcs =
+ static_cast<PIMAGE_RUNTIME_FUNCTION_ENTRY>(
+ ImageRvaToVa(img->FileHeader,
+ img->MappedAddress,
+ exception_rva,
+ &img->LastRvaSection));
+ for (DWORD i = 0; i < exception_size / sizeof(*funcs); i++) {
+ DWORD unwind_rva = funcs[i].UnwindInfoAddress;
+ // handle chaining
+ while (unwind_rva & 0x1) {
+ unwind_rva ^= 0x1;
+ PIMAGE_RUNTIME_FUNCTION_ENTRY chained_func =
+ static_cast<PIMAGE_RUNTIME_FUNCTION_ENTRY>(
+ ImageRvaToVa(img->FileHeader,
+ img->MappedAddress,
+ unwind_rva,
+ &img->LastRvaSection));
+ unwind_rva = chained_func->UnwindInfoAddress;
+ }
+
+ UnwindInfo *unwind_info = static_cast<UnwindInfo *>(
+ ImageRvaToVa(img->FileHeader,
+ img->MappedAddress,
+ unwind_rva,
+ &img->LastRvaSection));
+
+ DWORD stack_size = 8; // minimal stack size is 8 for RIP
+ DWORD rip_offset = 8;
+ do {
+ for (UBYTE c = 0; c < unwind_info->count_of_codes; c++) {
+ UnwindCode *unwind_code = &unwind_info->unwind_code[c];
+ switch (unwind_code->unwind_operation_code) {
+ case UWOP_PUSH_NONVOL: {
+ stack_size += 8;
+ break;
+ }
+ case UWOP_ALLOC_LARGE: {
+ if (unwind_code->operation_info == 0) {
+ c++;
+ if (c < unwind_info->count_of_codes)
+ stack_size += (unwind_code + 1)->frame_offset * 8;
+ } else {
+ c += 2;
+ if (c < unwind_info->count_of_codes)
+ stack_size += (unwind_code + 1)->frame_offset |
+ ((unwind_code + 2)->frame_offset << 16);
+ }
+ break;
+ }
+ case UWOP_ALLOC_SMALL: {
+ stack_size += unwind_code->operation_info * 8 + 8;
+ break;
+ }
+ case UWOP_SET_FPREG:
+ case UWOP_SAVE_XMM:
+ case UWOP_SAVE_XMM_FAR:
+ break;
+ case UWOP_SAVE_NONVOL:
+ case UWOP_SAVE_XMM128: {
+ c++; //skip slot with offset
+ break;
+ }
+ case UWOP_SAVE_NONVOL_FAR:
+ case UWOP_SAVE_XMM128_FAR: {
+ c += 2; //skip 2 slots with offset
+ break;
+ }
+ case UWOP_PUSH_MACHFRAME: {
+ if (unwind_code->operation_info) {
+ stack_size += 88;
+ } else {
+ stack_size += 80;
+ }
+ rip_offset += 80;
+ break;
+ }
+ }
+ }
+ if (unwind_info->flags & UNW_FLAG_CHAININFO) {
+ PIMAGE_RUNTIME_FUNCTION_ENTRY chained_func =
+ reinterpret_cast<PIMAGE_RUNTIME_FUNCTION_ENTRY>(
+ (unwind_info->unwind_code +
+ ((unwind_info->count_of_codes + 1) & ~1)));
+
+ unwind_info = static_cast<UnwindInfo *>(
+ ImageRvaToVa(img->FileHeader,
+ img->MappedAddress,
+ chained_func->UnwindInfoAddress,
+ &img->LastRvaSection));
+ } else {
+ unwind_info = NULL;
+ }
+ } while (unwind_info);
+ fprintf(output_, "STACK CFI INIT %x %x .cfa: $rsp .ra: .cfa %d - ^\n",
+ funcs[i].BeginAddress,
+ funcs[i].EndAddress - funcs[i].BeginAddress, rip_offset);
+ fprintf(output_, "STACK CFI %x .cfa: $rsp %d +\n",
+ funcs[i].BeginAddress, stack_size);
+ }
+
+ return true;
+}
+
+bool PDBSourceLineWriter::PrintFrameData() {
+ PDBModuleInfo info;
+ if (GetModuleInfo(&info) && info.cpu == L"x86_64") {
+ return PrintFrameDataUsingEXE();
+ } else {
+ return PrintFrameDataUsingPDB();
+ }
+ return false;
+}
+
bool PDBSourceLineWriter::PrintCodePublicSymbol(IDiaSymbol *symbol) {
BOOL is_code;
if (FAILED(symbol->get_code(&is_code))) {
diff --git a/src/common/windows/pdb_source_line_writer.h b/src/common/windows/pdb_source_line_writer.h
index be6121c3..d928a607 100644
--- a/src/common/windows/pdb_source_line_writer.h
+++ b/src/common/windows/pdb_source_line_writer.h
@@ -148,6 +148,16 @@ class PDBSourceLineWriter {
bool PrintSourceFiles();
// Outputs all of the frame information necessary to construct stack
+ // backtraces in the absence of frame pointers. For x86 data stored in
+ // .pdb files. Returns true on success.
+ bool PrintFrameDataUsingPDB();
+
+ // Outputs all of the frame information necessary to construct stack
+ // backtraces in the absence of frame pointers. For x64 data stored in
+ // .exe, .dll files. Returns true on success.
+ bool PrintFrameDataUsingEXE();
+
+ // Outputs all of the frame information necessary to construct stack
// backtraces in the absence of frame pointers. Returns true on success.
bool PrintFrameData();
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-26 15:23:35 +0000