lemo created this revision.
lemo added reviewers: amccarth, clayborg, labath.
lemo added a project: LLDB.
This change adds support for two types of Minidump CodeView records:
1. PDB70 (reference:
https://crashpad.chromium.org/doxygen/structcrashpad_1_1CodeViewRecordPDB70.html)
This is by far the most common record type.
2. ELF BuildID (found in Breakpad/Crashpad generated minidumps)
This would set a proper UUID for placeholder modules, in turn enabling an
accurate match with local module images.
https://reviews.llvm.org/D46292
Files:
include/lldb/Core/Module.h
include/lldb/Core/ModuleSpec.h
packages/Python/lldbsuite/test/functionalities/postmortem/minidump/TestMiniDump.py
source/Commands/CommandObjectTarget.cpp
source/Core/Module.cpp
source/Plugins/Process/minidump/MinidumpParser.cpp
source/Plugins/Process/minidump/MinidumpParser.h
source/Plugins/Process/minidump/MinidumpTypes.h
source/Plugins/Process/minidump/ProcessMinidump.cpp
Index: source/Plugins/Process/minidump/ProcessMinidump.cpp
===================================================================
--- source/Plugins/Process/minidump/ProcessMinidump.cpp
+++ source/Plugins/Process/minidump/ProcessMinidump.cpp
@@ -321,9 +321,10 @@
m_is_wow64 = true;
}
+ const auto uuid = m_minidump_parser.GetModuleUUID(module);
const auto file_spec =
FileSpec(name.getValue(), true, GetArchitecture().GetTriple());
- ModuleSpec module_spec = file_spec;
+ ModuleSpec module_spec(file_spec, uuid);
Status error;
lldb::ModuleSP module_sp = GetTarget().GetSharedModule(module_spec, &error);
if (!module_sp || error.Fail()) {
@@ -337,6 +338,7 @@
auto placeholder_module =
std::make_shared<PlaceholderModule>(file_spec, GetArchitecture());
placeholder_module->CreateImageSection(module, GetTarget());
+ placeholder_module->SetUUID(uuid);
module_sp = placeholder_module;
GetTarget().GetImages().Append(module_sp);
}
Index: source/Plugins/Process/minidump/MinidumpTypes.h
===================================================================
--- source/Plugins/Process/minidump/MinidumpTypes.h
+++ source/Plugins/Process/minidump/MinidumpTypes.h
@@ -43,6 +43,21 @@
};
+enum class CvSignature : uint32_t {
+ Pdb70 = 0x53445352, // RSDS
+ ElfBuildId = 0x4270454c, // BpEL (Breakpad/Crashpad minidumps)
+};
+
+// Reference:
+// https://crashpad.chromium.org/doxygen/structcrashpad_1_1CodeViewRecordPDB70.html
+struct CvRecordPdb70 {
+ uint8_t Uuid[16];
+ llvm::support::ulittle32_t Age;
+ // char PDBFileName[];
+};
+static_assert(sizeof(CvRecordPdb70) == 20,
+ "sizeof CvRecordPdb70 is not correct!");
+
// Reference:
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms680394.aspx
enum class MinidumpStreamType : uint32_t {
Index: source/Plugins/Process/minidump/MinidumpParser.h
===================================================================
--- source/Plugins/Process/minidump/MinidumpParser.h
+++ source/Plugins/Process/minidump/MinidumpParser.h
@@ -17,6 +17,7 @@
#include "lldb/Utility/ArchSpec.h"
#include "lldb/Utility/DataBuffer.h"
#include "lldb/Utility/Status.h"
+#include "lldb/Utility/UUID.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
@@ -54,6 +55,8 @@
llvm::Optional<std::string> GetMinidumpString(uint32_t rva);
+ UUID GetModuleUUID(const MinidumpModule* module);
+
llvm::ArrayRef<MinidumpThread> GetThreads();
llvm::ArrayRef<uint8_t> GetThreadContext(const MinidumpThread &td);
Index: source/Plugins/Process/minidump/MinidumpParser.cpp
===================================================================
--- source/Plugins/Process/minidump/MinidumpParser.cpp
+++ source/Plugins/Process/minidump/MinidumpParser.cpp
@@ -96,6 +96,40 @@
return parseMinidumpString(arr_ref);
}
+UUID MinidumpParser::GetModuleUUID(const MinidumpModule *module) {
+ auto cv_record =
+ GetData().slice(module->CV_record.rva, module->CV_record.data_size);
+
+ // Read the CV record signature
+ const llvm::support::ulittle32_t *signature = nullptr;
+ Status error = consumeObject(cv_record, signature);
+ if (error.Fail())
+ return UUID();
+
+ const CvSignature cv_signature =
+ static_cast<CvSignature>(static_cast<const uint32_t>(*signature));
+
+ if (cv_signature == CvSignature::Pdb70) {
+ // PDB70 record
+ const CvRecordPdb70 *pdb70_uuid = nullptr;
+ Status error = consumeObject(cv_record, pdb70_uuid);
+ if (!error.Fail())
+ return UUID(pdb70_uuid, sizeof(*pdb70_uuid));
+ } else if (cv_signature == CvSignature::ElfBuildId) {
+ // ELF BuildID (found in Breakpad/Crashpad generated minidumps)
+ //
+ // This is variable-length, but usually 20 bytes
+ // as the binutils ld default is a SHA-1 hash.
+ // (We'll handle only 16 and 20 bytes signatures,
+ // matching LLDB support for UUIDs)
+ //
+ if (cv_record.size() == 16 || cv_record.size() == 20)
+ return UUID(cv_record.data(), cv_record.size());
+ }
+
+ return UUID();
+}
+
llvm::ArrayRef<MinidumpThread> MinidumpParser::GetThreads() {
llvm::ArrayRef<uint8_t> data = GetStream(MinidumpStreamType::ThreadList);
Index: source/Core/Module.cpp
===================================================================
--- source/Core/Module.cpp
+++ source/Core/Module.cpp
@@ -335,6 +335,12 @@
return m_uuid;
}
+void Module::SetUUID(const lldb_private::UUID &uuid) {
+ std::lock_guard<std::recursive_mutex> guard(m_mutex);
+ m_uuid = uuid;
+ m_did_parse_uuid = true;
+}
+
TypeSystem *Module::GetTypeSystemForLanguage(LanguageType language) {
return m_type_system_map.GetTypeSystemForLanguage(language, this, true);
}
Index: source/Commands/CommandObjectTarget.cpp
===================================================================
--- source/Commands/CommandObjectTarget.cpp
+++ source/Commands/CommandObjectTarget.cpp
@@ -1386,6 +1386,10 @@
ObjectFile *objfile = module->GetObjectFile();
if (objfile)
objfile->Dump(&strm);
+ else {
+ strm.Printf("No object file for module: %s\n",
+ module->GetFileSpec().GetFilename().GetCString());
+ }
}
}
strm.IndentLess();
Index: packages/Python/lldbsuite/test/functionalities/postmortem/minidump/TestMiniDump.py
===================================================================
--- packages/Python/lldbsuite/test/functionalities/postmortem/minidump/TestMiniDump.py
+++ packages/Python/lldbsuite/test/functionalities/postmortem/minidump/TestMiniDump.py
@@ -49,17 +49,36 @@
self.process = self.target.LoadCore("fizzbuzz_no_heap.dmp")
self.assertTrue(self.process, PROCESS_IS_VALID)
expected_modules = [
- r"C:\Windows\System32/MSVCP120D.dll",
- r"C:\Windows\SysWOW64/kernel32.dll",
- r"C:\Users\amccarth\Documents\Visual Studio 2013\Projects\fizzbuzz\Debug/fizzbuzz.exe",
- r"C:\Windows\System32/MSVCR120D.dll",
- r"C:\Windows\SysWOW64/KERNELBASE.dll",
- r"C:\Windows\SysWOW64/ntdll.dll",
+ {
+ 'filename' : r"C:\Windows\System32/MSVCP120D.dll",
+ 'uuid' : '6E51053C-E757-EB40-8D3F-9722C5BD80DD-01000000',
+ },
+ {
+ 'filename' : r"C:\Windows\SysWOW64/kernel32.dll",
+ 'uuid' : '1B7ECBE5-5E00-1341-AB98-98D6913B52D8-02000000',
+ },
+ {
+ 'filename' : r"C:\Users\amccarth\Documents\Visual Studio 2013\Projects\fizzbuzz\Debug/fizzbuzz.exe",
+ 'uuid' : '91B7450F-969A-F946-BF8F-2D6076EA421A-11000000',
+ },
+ {
+ 'filename' : r"C:\Windows\System32/MSVCR120D.dll",
+ 'uuid' : '86FB8263-C446-4640-AE42-8D97B3F91FF2-01000000',
+ },
+ {
+ 'filename' : r"C:\Windows\SysWOW64/KERNELBASE.dll",
+ 'uuid' : '4152F90B-0DCB-D44B-AC5D-186A6452E522-01000000',
+ },
+ {
+ 'filename' : r"C:\Windows\SysWOW64/ntdll.dll",
+ 'uuid' : '6A84B0BB-2C40-5240-A16B-67650BBFE6B0-02000000',
+ },
]
self.assertEqual(self.target.GetNumModules(), len(expected_modules))
for module, expected in zip(self.target.modules, expected_modules):
self.assertTrue(module.IsValid())
- self.assertEqual(module.file.fullpath, expected)
+ self.assertEqual(module.file.fullpath, expected['filename'])
+ self.assertEqual(module.GetUUIDString(), expected['uuid'])
@expectedFailureAll(bugnumber="llvm.org/pr35193", hostoslist=["windows"])
def test_stack_info_in_mini_dump(self):
Index: include/lldb/Core/ModuleSpec.h
===================================================================
--- include/lldb/Core/ModuleSpec.h
+++ include/lldb/Core/ModuleSpec.h
@@ -34,9 +34,9 @@
m_object_name(), m_object_offset(0), m_object_size(0),
m_source_mappings() {}
- ModuleSpec(const FileSpec &file_spec)
+ ModuleSpec(const FileSpec &file_spec, const UUID& uuid = UUID())
: m_file(file_spec), m_platform_file(), m_symbol_file(), m_arch(),
- m_uuid(), m_object_name(), m_object_offset(0),
+ m_uuid(uuid), m_object_name(), m_object_offset(0),
m_object_size(file_spec.GetByteSize()), m_source_mappings() {}
ModuleSpec(const FileSpec &file_spec, const ArchSpec &arch)
Index: include/lldb/Core/Module.h
===================================================================
--- include/lldb/Core/Module.h
+++ include/lldb/Core/Module.h
@@ -757,7 +757,7 @@
TypeList *GetTypeList();
//------------------------------------------------------------------
- /// Get a pointer to the UUID value contained in this object.
+ /// Get a reference to the UUID value contained in this object.
///
/// If the executable image file doesn't not have a UUID value built
/// into the file format, an MD5 checksum of the entire file, or
@@ -771,6 +771,14 @@
const lldb_private::UUID &GetUUID();
//------------------------------------------------------------------
+ /// Explicitly set the UUID
+ ///
+ /// @param[in] uuid
+ /// The new UUID for this module.
+ //------------------------------------------------------------------
+ void SetUUID(const lldb_private::UUID &uuid);
+
+ //------------------------------------------------------------------
/// A debugging function that will cause everything in a module to
/// be parsed.
///
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