This revision was automatically updated to reflect the committed changes.
Closed by commit rG87a2dba14ec8: [lldb] Fix loading DLL from some ramdisk on
Windows (authored by alvinhochun, committed by mstorsjo).
Herald added a subscriber: Michael137.
Changed prior to commit:
https://reviews.llvm.org/D126657?vs=432931&id=437144#toc
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D126657/new/
https://reviews.llvm.org/D126657
Files:
lldb/source/Plugins/Process/Windows/Common/DebuggerThread.cpp
Index: lldb/source/Plugins/Process/Windows/Common/DebuggerThread.cpp
===================================================================
--- lldb/source/Plugins/Process/Windows/Common/DebuggerThread.cpp
+++ lldb/source/Plugins/Process/Windows/Common/DebuggerThread.cpp
@@ -13,6 +13,7 @@
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Host/ProcessLaunchInfo.h"
#include "lldb/Host/ThreadLauncher.h"
+#include "lldb/Host/windows/AutoHandle.h"
#include "lldb/Host/windows/HostProcessWindows.h"
#include "lldb/Host/windows/HostThreadWindows.h"
#include "lldb/Host/windows/ProcessLauncherWindows.h"
@@ -29,6 +30,8 @@
#include "llvm/Support/Threading.h"
#include "llvm/Support/raw_ostream.h"
+#include <psapi.h>
+
#ifndef STATUS_WX86_BREAKPOINT
#define STATUS_WX86_BREAKPOINT 0x4000001FL // For WOW64
#endif
@@ -409,6 +412,61 @@
return DBG_CONTINUE;
}
+static llvm::Optional<std::string> GetFileNameFromHandleFallback(HANDLE hFile) {
+ // Check that file is not empty as we cannot map a file with zero length.
+ DWORD dwFileSizeHi = 0;
+ DWORD dwFileSizeLo = ::GetFileSize(hFile, &dwFileSizeHi);
+ if (dwFileSizeLo == 0 && dwFileSizeHi == 0)
+ return llvm::None;
+
+ AutoHandle filemap(
+ ::CreateFileMappingW(hFile, nullptr, PAGE_READONLY, 0, 1, NULL), nullptr);
+ if (!filemap.IsValid())
+ return llvm::None;
+
+ auto view_deleter = [](void *pMem) { ::UnmapViewOfFile(pMem); };
+ std::unique_ptr<void, decltype(view_deleter)> pMem(
+ ::MapViewOfFile(filemap.get(), FILE_MAP_READ, 0, 0, 1), view_deleter);
+ if (!pMem)
+ return llvm::None;
+
+ std::array<wchar_t, MAX_PATH + 1> mapped_filename;
+ if (!::GetMappedFileNameW(::GetCurrentProcess(), pMem.get(),
+ mapped_filename.data(), mapped_filename.size()))
+ return llvm::None;
+
+ // A series of null-terminated strings, plus an additional null character
+ std::array<wchar_t, 512> drive_strings;
+ drive_strings[0] = L'\0';
+ if (!::GetLogicalDriveStringsW(drive_strings.size(), drive_strings.data()))
+ return llvm::None;
+
+ std::array<wchar_t, 3> drive = {L"_:"};
+ for (const wchar_t *it = drive_strings.data(); *it != L'\0';
+ it += wcslen(it) + 1) {
+ // Copy the drive letter to the template string
+ drive[0] = it[0];
+ std::array<wchar_t, MAX_PATH> device_name;
+ if (::QueryDosDeviceW(drive.data(), device_name.data(),
+ device_name.size())) {
+ size_t device_name_len = wcslen(device_name.data());
+ if (device_name_len < mapped_filename.size()) {
+ bool match = _wcsnicmp(mapped_filename.data(), device_name.data(),
+ device_name_len) == 0;
+ if (match && mapped_filename[device_name_len] == L'\\') {
+ // Replace device path with its drive letter
+ std::wstring rebuilt_path(drive.data());
+ rebuilt_path.append(&mapped_filename[device_name_len]);
+ std::string path_utf8;
+ llvm::convertWideToUTF8(rebuilt_path, path_utf8);
+ return path_utf8;
+ }
+ }
+ }
+ }
+ return llvm::None;
+}
+
DWORD
DebuggerThread::HandleLoadDllEvent(const LOAD_DLL_DEBUG_INFO &info,
DWORD thread_id) {
@@ -420,6 +478,17 @@
return DBG_CONTINUE;
}
+ auto on_load_dll = [&](llvm::StringRef path) {
+ FileSpec file_spec(path);
+ ModuleSpec module_spec(file_spec);
+ lldb::addr_t load_addr = reinterpret_cast<lldb::addr_t>(info.lpBaseOfDll);
+
+ LLDB_LOG(log, "Inferior {0} - DLL '{1}' loaded at address {2:x}...",
+ m_process.GetProcessId(), path, info.lpBaseOfDll);
+
+ m_debug_delegate->OnLoadDll(module_spec, load_addr);
+ };
+
std::vector<wchar_t> buffer(1);
DWORD required_size =
GetFinalPathNameByHandleW(info.hFile, &buffer[0], 0, VOLUME_NAME_DOS);
@@ -434,14 +503,10 @@
if (path_str.startswith("\\\\?\\"))
path += 4;
- FileSpec file_spec(path);
- ModuleSpec module_spec(file_spec);
- lldb::addr_t load_addr = reinterpret_cast<lldb::addr_t>(info.lpBaseOfDll);
-
- LLDB_LOG(log, "Inferior {0} - DLL '{1}' loaded at address {2:x}...",
- m_process.GetProcessId(), path, info.lpBaseOfDll);
-
- m_debug_delegate->OnLoadDll(module_spec, load_addr);
+ on_load_dll(path);
+ } else if (llvm::Optional<std::string> path =
+ GetFileNameFromHandleFallback(info.hFile)) {
+ on_load_dll(*path);
} else {
LLDB_LOG(
log,
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