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Diffstat (limited to 'source/Plugins/Process/Linux/NativeProcessLinux.cpp')
-rw-r--r--source/Plugins/Process/Linux/NativeProcessLinux.cpp193
1 files changed, 89 insertions, 104 deletions
diff --git a/source/Plugins/Process/Linux/NativeProcessLinux.cpp b/source/Plugins/Process/Linux/NativeProcessLinux.cpp
index 94b9efc2b2b0..fb84729dd5f4 100644
--- a/source/Plugins/Process/Linux/NativeProcessLinux.cpp
+++ b/source/Plugins/Process/Linux/NativeProcessLinux.cpp
@@ -1689,68 +1689,14 @@ Error NativeProcessLinux::GetMemoryRegionInfo(lldb::addr_t load_addr,
// Assume proc maps entries are in ascending order.
// FIXME assert if we find differently.
- Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS));
- Error error;
-
if (m_supports_mem_region == LazyBool::eLazyBoolNo) {
// We're done.
- error.SetErrorString("unsupported");
- return error;
+ return Error("unsupported");
}
- // If our cache is empty, pull the latest. There should always be at least
- // one memory region
- // if memory region handling is supported.
- if (m_mem_region_cache.empty()) {
- error = ProcFileReader::ProcessLineByLine(
- GetID(), "maps", [&](const std::string &line) -> bool {
- MemoryRegionInfo info;
- const Error parse_error =
- ParseMemoryRegionInfoFromProcMapsLine(line, info);
- if (parse_error.Success()) {
- m_mem_region_cache.push_back(info);
- return true;
- } else {
- if (log)
- log->Printf("NativeProcessLinux::%s failed to parse proc maps "
- "line '%s': %s",
- __FUNCTION__, line.c_str(), error.AsCString());
- return false;
- }
- });
-
- // If we had an error, we'll mark unsupported.
- if (error.Fail()) {
- m_supports_mem_region = LazyBool::eLazyBoolNo;
- return error;
- } else if (m_mem_region_cache.empty()) {
- // No entries after attempting to read them. This shouldn't happen if
- // /proc/{pid}/maps
- // is supported. Assume we don't support map entries via procfs.
- if (log)
- log->Printf("NativeProcessLinux::%s failed to find any procfs maps "
- "entries, assuming no support for memory region metadata "
- "retrieval",
- __FUNCTION__);
- m_supports_mem_region = LazyBool::eLazyBoolNo;
- error.SetErrorString("not supported");
- return error;
- }
-
- if (log)
- log->Printf("NativeProcessLinux::%s read %" PRIu64
- " memory region entries from /proc/%" PRIu64 "/maps",
- __FUNCTION__,
- static_cast<uint64_t>(m_mem_region_cache.size()), GetID());
-
- // We support memory retrieval, remember that.
- m_supports_mem_region = LazyBool::eLazyBoolYes;
- } else {
- if (log)
- log->Printf("NativeProcessLinux::%s reusing %" PRIu64
- " cached memory region entries",
- __FUNCTION__,
- static_cast<uint64_t>(m_mem_region_cache.size()));
+ Error error = PopulateMemoryRegionCache();
+ if (error.Fail()) {
+ return error;
}
lldb::addr_t prev_base_address = 0;
@@ -1760,7 +1706,7 @@ Error NativeProcessLinux::GetMemoryRegionInfo(lldb::addr_t load_addr,
// There can be a ton of regions on pthreads apps with lots of threads.
for (auto it = m_mem_region_cache.begin(); it != m_mem_region_cache.end();
++it) {
- MemoryRegionInfo &proc_entry_info = *it;
+ MemoryRegionInfo &proc_entry_info = it->first;
// Sanity check assumption that /proc/{pid}/maps entries are ascending.
assert((proc_entry_info.GetRange().GetRangeBase() >= prev_base_address) &&
@@ -1803,6 +1749,67 @@ Error NativeProcessLinux::GetMemoryRegionInfo(lldb::addr_t load_addr,
return error;
}
+Error NativeProcessLinux::PopulateMemoryRegionCache() {
+ Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS));
+
+ // If our cache is empty, pull the latest. There should always be at least
+ // one memory region if memory region handling is supported.
+ if (!m_mem_region_cache.empty()) {
+ if (log)
+ log->Printf("NativeProcessLinux::%s reusing %" PRIu64
+ " cached memory region entries",
+ __FUNCTION__,
+ static_cast<uint64_t>(m_mem_region_cache.size()));
+ return Error();
+ }
+
+ Error error = ProcFileReader::ProcessLineByLine(
+ GetID(), "maps", [&](const std::string &line) -> bool {
+ MemoryRegionInfo info;
+ const Error parse_error =
+ ParseMemoryRegionInfoFromProcMapsLine(line, info);
+ if (parse_error.Success()) {
+ m_mem_region_cache.emplace_back(
+ info, FileSpec(info.GetName().GetCString(), true));
+ return true;
+ } else {
+ if (log)
+ log->Printf("NativeProcessLinux::%s failed to parse proc maps "
+ "line '%s': %s",
+ __FUNCTION__, line.c_str(), parse_error.AsCString());
+ return false;
+ }
+ });
+
+ // If we had an error, we'll mark unsupported.
+ if (error.Fail()) {
+ m_supports_mem_region = LazyBool::eLazyBoolNo;
+ return error;
+ } else if (m_mem_region_cache.empty()) {
+ // No entries after attempting to read them. This shouldn't happen if
+ // /proc/{pid}/maps is supported. Assume we don't support map entries
+ // via procfs.
+ if (log)
+ log->Printf("NativeProcessLinux::%s failed to find any procfs maps "
+ "entries, assuming no support for memory region metadata "
+ "retrieval",
+ __FUNCTION__);
+ m_supports_mem_region = LazyBool::eLazyBoolNo;
+ error.SetErrorString("not supported");
+ return error;
+ }
+
+ if (log)
+ log->Printf("NativeProcessLinux::%s read %" PRIu64
+ " memory region entries from /proc/%" PRIu64 "/maps",
+ __FUNCTION__, static_cast<uint64_t>(m_mem_region_cache.size()),
+ GetID());
+
+ // We support memory retrieval, remember that.
+ m_supports_mem_region = LazyBool::eLazyBoolYes;
+ return Error();
+}
+
void NativeProcessLinux::DoStopIDBumped(uint32_t newBumpId) {
Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS));
if (log)
@@ -2463,60 +2470,38 @@ Error NativeProcessLinux::FixupBreakpointPCAsNeeded(NativeThreadLinux &thread) {
Error NativeProcessLinux::GetLoadedModuleFileSpec(const char *module_path,
FileSpec &file_spec) {
+ Error error = PopulateMemoryRegionCache();
+ if (error.Fail())
+ return error;
+
FileSpec module_file_spec(module_path, true);
- bool found = false;
file_spec.Clear();
- ProcFileReader::ProcessLineByLine(
- GetID(), "maps", [&](const std::string &line) {
- SmallVector<StringRef, 16> columns;
- StringRef(line).split(columns, " ", -1, false);
- if (columns.size() < 6)
- return true; // continue searching
-
- FileSpec this_file_spec(columns[5].str(), false);
- if (this_file_spec.GetFilename() != module_file_spec.GetFilename())
- return true; // continue searching
-
- file_spec = this_file_spec;
- found = true;
- return false; // we are done
- });
-
- if (!found)
- return Error("Module file (%s) not found in /proc/%" PRIu64 "/maps file!",
- module_file_spec.GetFilename().AsCString(), GetID());
-
- return Error();
+ for (const auto &it : m_mem_region_cache) {
+ if (it.second.GetFilename() == module_file_spec.GetFilename()) {
+ file_spec = it.second;
+ return Error();
+ }
+ }
+ return Error("Module file (%s) not found in /proc/%" PRIu64 "/maps file!",
+ module_file_spec.GetFilename().AsCString(), GetID());
}
Error NativeProcessLinux::GetFileLoadAddress(const llvm::StringRef &file_name,
lldb::addr_t &load_addr) {
load_addr = LLDB_INVALID_ADDRESS;
- Error error = ProcFileReader::ProcessLineByLine(
- GetID(), "maps", [&](const std::string &line) -> bool {
- StringRef maps_row(line);
-
- SmallVector<StringRef, 16> maps_columns;
- maps_row.split(maps_columns, StringRef(" "), -1, false);
-
- if (maps_columns.size() < 6) {
- // Return true to continue reading the proc file
- return true;
- }
-
- if (maps_columns[5] == file_name) {
- StringExtractor addr_extractor(maps_columns[0].str().c_str());
- load_addr = addr_extractor.GetHexMaxU64(false, LLDB_INVALID_ADDRESS);
-
- // Return false to stop reading the proc file further
- return false;
- }
+ Error error = PopulateMemoryRegionCache();
+ if (error.Fail())
+ return error;
- // Return true to continue reading the proc file
- return true;
- });
- return error;
+ FileSpec file(file_name, false);
+ for (const auto &it : m_mem_region_cache) {
+ if (it.second == file) {
+ load_addr = it.first.GetRange().GetRangeBase();
+ return Error();
+ }
+ }
+ return Error("No load address found for specified file.");
}
NativeThreadLinuxSP NativeProcessLinux::GetThreadByID(lldb::tid_t tid) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-09 21:08:24 +0000