aadsm updated this revision to Diff 211241.
aadsm added a comment.
Handle error returned by GetLoadedModuleList
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D64013/new/
https://reviews.llvm.org/D64013
Files:
lldb/include/lldb/Target/Process.h
lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DYLDRendezvous.cpp
lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DYLDRendezvous.h
lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp
lldb/source/Plugins/DynamicLoader/Windows-DYLD/DynamicLoaderWindowsDYLD.cpp
lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.h
Index: lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.h
===================================================================
--- lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.h
+++ lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.h
@@ -200,9 +200,9 @@
llvm::VersionTuple GetHostOSVersion() override;
- size_t LoadModules(LoadedModuleInfoList &module_list) override;
+ llvm::Error LoadModules() override;
- size_t LoadModules() override;
+ llvm::Expected<LoadedModuleInfoList> GetLoadedModuleList() override;
Status GetFileLoadAddress(const FileSpec &file, bool &is_loaded,
lldb::addr_t &load_addr) override;
@@ -391,9 +391,6 @@
// Query remote GDBServer for register information
bool GetGDBServerRegisterInfo(ArchSpec &arch);
- // Query remote GDBServer for a detailed loaded library list
- Status GetLoadedModuleList(LoadedModuleInfoList &);
-
lldb::ModuleSP LoadModuleAtAddress(const FileSpec &file,
lldb::addr_t link_map,
lldb::addr_t base_addr,
Index: lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
===================================================================
--- lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
+++ lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
@@ -2400,7 +2400,12 @@
ostr.Printf("%" PRIu64 " %" PRIu32, wp_addr, wp_index);
description = ostr.GetString();
} else if (key.compare("library") == 0) {
- LoadModules();
+ auto error = LoadModules();
+ if (error) {
+ Log *log(
+ ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS));
+ LLDB_LOG_ERROR(log, std::move(error), "Failed to load modules: {0}");
+ }
} else if (key.size() == 2 && ::isxdigit(key[0]) && ::isxdigit(key[1])) {
uint32_t reg = UINT32_MAX;
if (!key.getAsInteger(16, reg))
@@ -2756,9 +2761,13 @@
// the loaded module list can also provides a link map address
if (addr == LLDB_INVALID_ADDRESS) {
- LoadedModuleInfoList list;
- if (GetLoadedModuleList(list).Success())
- addr = list.m_link_map;
+ llvm::Expected<LoadedModuleInfoList> list = GetLoadedModuleList();
+ if (!list) {
+ Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS));
+ LLDB_LOG_ERROR(log, list.takeError(), "Failed to read module list: {0}");
+ } else {
+ addr = list->m_link_map;
+ }
}
return addr;
@@ -4705,29 +4714,30 @@
return m_register_info.GetNumRegisters() > 0;
}
-Status ProcessGDBRemote::GetLoadedModuleList(LoadedModuleInfoList &list) {
+llvm::Expected<LoadedModuleInfoList> ProcessGDBRemote::GetLoadedModuleList() {
// Make sure LLDB has an XML parser it can use first
if (!XMLDocument::XMLEnabled())
- return Status(0, ErrorType::eErrorTypeGeneric);
+ return llvm::createStringError(llvm::inconvertibleErrorCode(),
+ "XML parsing not available");
Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS);
if (log)
log->Printf("ProcessGDBRemote::%s", __FUNCTION__);
+ LoadedModuleInfoList list;
GDBRemoteCommunicationClient &comm = m_gdb_comm;
bool can_use_svr4 = GetGlobalPluginProperties()->GetUseSVR4();
// check that we have extended feature read support
if (can_use_svr4 && comm.GetQXferLibrariesSVR4ReadSupported()) {
- list.clear();
-
// request the loaded library list
std::string raw;
lldb_private::Status lldberr;
if (!comm.ReadExtFeature(ConstString("libraries-svr4"), ConstString(""),
raw, lldberr))
- return Status(0, ErrorType::eErrorTypeGeneric);
+ return llvm::createStringError(llvm::inconvertibleErrorCode(),
+ "Error in libraries-svr4 packet");
// parse the xml file in memory
if (log)
@@ -4735,11 +4745,14 @@
XMLDocument doc;
if (!doc.ParseMemory(raw.c_str(), raw.size(), "noname.xml"))
- return Status(0, ErrorType::eErrorTypeGeneric);
+ return llvm::createStringError(llvm::inconvertibleErrorCode(),
+ "Error reading noname.xml");
XMLNode root_element = doc.GetRootElement("library-list-svr4");
if (!root_element)
- return Status();
+ return llvm::createStringError(
+ llvm::inconvertibleErrorCode(),
+ "Error finding library-list-svr4 xml element");
// main link map structure
llvm::StringRef main_lm = root_element.GetAttributeValue("main-lm");
@@ -4805,27 +4818,29 @@
if (log)
log->Printf("found %" PRId32 " modules in total",
(int)list.m_list.size());
+ return list;
} else if (comm.GetQXferLibrariesReadSupported()) {
- list.clear();
-
// request the loaded library list
std::string raw;
lldb_private::Status lldberr;
if (!comm.ReadExtFeature(ConstString("libraries"), ConstString(""), raw,
lldberr))
- return Status(0, ErrorType::eErrorTypeGeneric);
+ return llvm::createStringError(llvm::inconvertibleErrorCode(),
+ "Error in libraries packet");
if (log)
log->Printf("parsing: %s", raw.c_str());
XMLDocument doc;
if (!doc.ParseMemory(raw.c_str(), raw.size(), "noname.xml"))
- return Status(0, ErrorType::eErrorTypeGeneric);
+ return llvm::createStringError(llvm::inconvertibleErrorCode(),
+ "Error reading noname.xml");
XMLNode root_element = doc.GetRootElement("library-list");
if (!root_element)
- return Status();
+ return llvm::createStringError(llvm::inconvertibleErrorCode(),
+ "Error finding library-list xml element");
root_element.ForEachChildElementWithName(
"library", [log, &list](const XMLNode &library) -> bool {
@@ -4865,11 +4880,11 @@
if (log)
log->Printf("found %" PRId32 " modules in total",
(int)list.m_list.size());
+ return list;
} else {
- return Status(0, ErrorType::eErrorTypeGeneric);
+ return llvm::createStringError(llvm::inconvertibleErrorCode(),
+ "Remote libraries not supported");
}
-
- return Status();
}
lldb::ModuleSP ProcessGDBRemote::LoadModuleAtAddress(const FileSpec &file,
@@ -4884,17 +4899,18 @@
value_is_offset);
}
-size_t ProcessGDBRemote::LoadModules(LoadedModuleInfoList &module_list) {
+llvm::Error ProcessGDBRemote::LoadModules() {
using lldb_private::process_gdb_remote::ProcessGDBRemote;
// request a list of loaded libraries from GDBServer
- if (GetLoadedModuleList(module_list).Fail())
- return 0;
+ llvm::Expected<LoadedModuleInfoList> module_list = GetLoadedModuleList();
+ if (!module_list)
+ return module_list.takeError();
// get a list of all the modules
ModuleList new_modules;
- for (LoadedModuleInfoList::LoadedModuleInfo &modInfo : module_list.m_list) {
+ for (LoadedModuleInfoList::LoadedModuleInfo &modInfo : module_list->m_list) {
std::string mod_name;
lldb::addr_t mod_base;
lldb::addr_t link_map;
@@ -4961,12 +4977,7 @@
m_process->GetTarget().ModulesDidLoad(new_modules);
}
- return new_modules.GetSize();
-}
-
-size_t ProcessGDBRemote::LoadModules() {
- LoadedModuleInfoList module_list;
- return LoadModules(module_list);
+ return llvm::ErrorSuccess();
}
Status ProcessGDBRemote::GetFileLoadAddress(const FileSpec &file,
Index: lldb/source/Plugins/DynamicLoader/Windows-DYLD/DynamicLoaderWindowsDYLD.cpp
===================================================================
--- lldb/source/Plugins/DynamicLoader/Windows-DYLD/DynamicLoaderWindowsDYLD.cpp
+++ lldb/source/Plugins/DynamicLoader/Windows-DYLD/DynamicLoaderWindowsDYLD.cpp
@@ -147,7 +147,8 @@
ModuleList module_list;
module_list.Append(executable);
m_process->GetTarget().ModulesDidLoad(module_list);
- m_process->LoadModules();
+ auto error = m_process->LoadModules();
+ LLDB_LOG_ERROR(log, std::move(error), "failed to load modules: {0}");
}
void DynamicLoaderWindowsDYLD::DidLaunch() {
@@ -167,7 +168,8 @@
ModuleList module_list;
module_list.Append(executable);
m_process->GetTarget().ModulesDidLoad(module_list);
- m_process->LoadModules();
+ auto error = m_process->LoadModules();
+ LLDB_LOG_ERROR(log, std::move(error), "failed to load modules: {0}");
}
}
Index: lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp
===================================================================
--- lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp
+++ lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp
@@ -96,7 +96,8 @@
m_process ? m_process->GetID() : LLDB_INVALID_PROCESS_ID);
// ask the process if it can load any of its own modules
- m_process->LoadModules();
+ auto error = m_process->LoadModules();
+ LLDB_LOG_ERROR(log, std::move(error), "Couldn't load modules: {0}");
ModuleSP executable_sp = GetTargetExecutable();
ResolveExecutableModule(executable_sp);
Index: lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DYLDRendezvous.h
===================================================================
--- lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DYLDRendezvous.h
+++ lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DYLDRendezvous.h
@@ -222,16 +222,20 @@
/// Updates the current set of SOEntries, the set of added entries, and the
/// set of removed entries.
- bool UpdateSOEntries(bool fromRemote = false);
+ bool UpdateSOEntries();
+
+ /// Same as UpdateSOEntries but it gets the list of loaded modules from the
+ /// remote debug server (faster when supported).
+ bool UpdateSOEntriesFromRemote();
bool FillSOEntryFromModuleInfo(
LoadedModuleInfoList::LoadedModuleInfo const &modInfo, SOEntry &entry);
- bool SaveSOEntriesFromRemote(LoadedModuleInfoList &module_list);
+ bool SaveSOEntriesFromRemote(const LoadedModuleInfoList &module_list);
- bool AddSOEntriesFromRemote(LoadedModuleInfoList &module_list);
+ bool AddSOEntriesFromRemote(const LoadedModuleInfoList &module_list);
- bool RemoveSOEntriesFromRemote(LoadedModuleInfoList &module_list);
+ bool RemoveSOEntriesFromRemote(const LoadedModuleInfoList &module_list);
bool AddSOEntries();
@@ -248,6 +252,17 @@
enum PThreadField { eSize, eNElem, eOffset };
bool FindMetadata(const char *name, PThreadField field, uint32_t &value);
+
+ enum RendezvousAction {
+ eNoAction,
+ eTakeSnapshot,
+ eAddModules,
+ eRemoveModules
+ };
+
+ /// Returns the current action to be taken given the current and previous
+ /// state
+ RendezvousAction GetAction() const;
};
#endif
Index: lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DYLDRendezvous.cpp
===================================================================
--- lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DYLDRendezvous.cpp
+++ lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DYLDRendezvous.cpp
@@ -168,7 +168,10 @@
m_previous = m_current;
m_current = info;
- if (UpdateSOEntries(true))
+ if (m_current.map_addr == 0)
+ return false;
+
+ if (UpdateSOEntriesFromRemote())
return true;
return UpdateSOEntries();
@@ -178,53 +181,89 @@
return m_rendezvous_addr != LLDB_INVALID_ADDRESS;
}
-bool DYLDRendezvous::UpdateSOEntries(bool fromRemote) {
- SOEntry entry;
- LoadedModuleInfoList module_list;
+DYLDRendezvous::RendezvousAction DYLDRendezvous::GetAction() const {
+ switch (m_current.state) {
+
+ case eConsistent:
+ switch (m_previous.state) {
+ // When the previous and current states are consistent this is the first
+ // time we have been asked to update. Just take a snapshot of the
+ // currently loaded modules.
+ case eConsistent:
+ return eTakeSnapshot;
+ // If we are about to add or remove a shared object clear out the current
+ // state and take a snapshot of the currently loaded images.
+ case eAdd:
+ return eAddModules;
+ case eDelete:
+ return eRemoveModules;
+ }
+ break;
- // If we can't get the SO info from the remote, return failure.
- if (fromRemote && m_process->LoadModules(module_list) == 0)
- return false;
+ case eAdd:
+ case eDelete:
+ // Some versions of the android dynamic linker might send two
+ // notifications with state == eAdd back to back. Ignore them until we
+ // get an eConsistent notification.
+ if (!(m_previous.state == eConsistent ||
+ (m_previous.state == eAdd && m_current.state == eDelete)))
+ return eNoAction;
- if (!fromRemote && m_current.map_addr == 0)
+ return eTakeSnapshot;
+ }
+
+ return eNoAction;
+}
+
+bool DYLDRendezvous::UpdateSOEntriesFromRemote() {
+ auto action = GetAction();
+
+ if (action == eNoAction)
return false;
- // When the previous and current states are consistent this is the first time
- // we have been asked to update. Just take a snapshot of the currently
- // loaded modules.
- if (m_previous.state == eConsistent && m_current.state == eConsistent)
- return fromRemote ? SaveSOEntriesFromRemote(module_list)
- : TakeSnapshot(m_soentries);
-
- // If we are about to add or remove a shared object clear out the current
- // state and take a snapshot of the currently loaded images.
- if (m_current.state == eAdd || m_current.state == eDelete) {
- // Some versions of the android dynamic linker might send two notifications
- // with state == eAdd back to back. Ignore them until we get an eConsistent
- // notification.
- if (!(m_previous.state == eConsistent ||
- (m_previous.state == eAdd && m_current.state == eDelete)))
- return false;
+ if (action == eTakeSnapshot) {
+ m_added_soentries.clear();
+ m_removed_soentries.clear();
+ // We already have the loaded list from the previous update so no need to
+ // find all the modules again.
+ if (!m_loaded_modules.m_list.empty())
+ return true;
+ }
+
+ llvm::Expected<LoadedModuleInfoList> module_list =
+ m_process->GetLoadedModuleList();
+ if (!module_list) {
+ llvm::consumeError(module_list.takeError());
+ return false;
+ }
+ switch (action) {
+ case eTakeSnapshot:
m_soentries.clear();
- if (fromRemote)
- return SaveSOEntriesFromRemote(module_list);
+ return SaveSOEntriesFromRemote(*module_list);
+ case eAddModules:
+ return AddSOEntriesFromRemote(*module_list);
+ case eRemoveModules:
+ return RemoveSOEntriesFromRemote(*module_list);
+ case eNoAction:
+ return false;
+ }
+}
+bool DYLDRendezvous::UpdateSOEntries() {
+ switch (GetAction()) {
+ case eTakeSnapshot:
+ m_soentries.clear();
m_added_soentries.clear();
m_removed_soentries.clear();
return TakeSnapshot(m_soentries);
+ case eAddModules:
+ return AddSOEntries();
+ case eRemoveModules:
+ return RemoveSOEntries();
+ case eNoAction:
+ return false;
}
- assert(m_current.state == eConsistent);
-
- // Otherwise check the previous state to determine what to expect and update
- // accordingly.
- if (m_previous.state == eAdd)
- return fromRemote ? AddSOEntriesFromRemote(module_list) : AddSOEntries();
- else if (m_previous.state == eDelete)
- return fromRemote ? RemoveSOEntriesFromRemote(module_list)
- : RemoveSOEntries();
-
- return false;
}
bool DYLDRendezvous::FillSOEntryFromModuleInfo(
@@ -255,7 +294,7 @@
}
bool DYLDRendezvous::SaveSOEntriesFromRemote(
- LoadedModuleInfoList &module_list) {
+ const LoadedModuleInfoList &module_list) {
for (auto const &modInfo : module_list.m_list) {
SOEntry entry;
if (!FillSOEntryFromModuleInfo(modInfo, entry))
@@ -270,7 +309,8 @@
return true;
}
-bool DYLDRendezvous::AddSOEntriesFromRemote(LoadedModuleInfoList &module_list) {
+bool DYLDRendezvous::AddSOEntriesFromRemote(
+ const LoadedModuleInfoList &module_list) {
for (auto const &modInfo : module_list.m_list) {
bool found = false;
for (auto const &existing : m_loaded_modules.m_list) {
@@ -288,8 +328,10 @@
return false;
// Only add shared libraries and not the executable.
- if (!SOEntryIsMainExecutable(entry))
+ if (!SOEntryIsMainExecutable(entry)) {
m_soentries.push_back(entry);
+ m_added_soentries.push_back(entry);
+ }
}
m_loaded_modules = module_list;
@@ -297,7 +339,7 @@
}
bool DYLDRendezvous::RemoveSOEntriesFromRemote(
- LoadedModuleInfoList &module_list) {
+ const LoadedModuleInfoList &module_list) {
for (auto const &existing : m_loaded_modules.m_list) {
bool found = false;
for (auto const &modInfo : module_list.m_list) {
@@ -321,6 +363,7 @@
return false;
m_soentries.erase(pos);
+ m_removed_soentries.push_back(entry);
}
}
Index: lldb/include/lldb/Target/Process.h
===================================================================
--- lldb/include/lldb/Target/Process.h
+++ lldb/include/lldb/Target/Process.h
@@ -680,10 +680,19 @@
/// shared library load state.
///
/// \return
- /// The number of shared libraries that were loaded
- virtual size_t LoadModules() { return 0; }
+ /// A status object indicating if the operation was sucessful or not.
+ virtual llvm::Error LoadModules() {
+ return llvm::make_error<llvm::StringError>("Not implemented.",
+ llvm::inconvertibleErrorCode());
+ }
- virtual size_t LoadModules(LoadedModuleInfoList &) { return 0; }
+ /// Query remote GDBServer for a detailed loaded library list
+ /// \return
+ /// The list of modules currently loaded by the process, or an error.
+ virtual llvm::Expected<LoadedModuleInfoList> GetLoadedModuleList() {
+ return llvm::createStringError(llvm::inconvertibleErrorCode(),
+ "Not implemented");
+ }
protected:
virtual JITLoaderList &GetJITLoaders();
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