This patch changes linkage with dbghlp.dll for clang from static (at load time)
to on demand (at the first use of required functions). Clang uses dbghlp.dll
only in minor use-cases. First of all in case of crash and in case of plugin load.
The dbghlp.dll library can be absent on system. In this case clang will fail
to load. With lazy load of dbghlp.dll clang can work even if dbghlp.dll
is not available.
Differential Revision: http://reviews.llvm.org/D10737
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241271
91177308-0d34-0410-b5e6-
96231b3b80d8
AC_CHECK_LIB(m,sin)
if test "$llvm_cv_os_type" = "MingW" ; then
AC_CHECK_LIB(m,sin)
if test "$llvm_cv_os_type" = "MingW" ; then
- AC_CHECK_LIB(imagehlp, main)
AC_CHECK_LIB(ole32, main)
AC_CHECK_LIB(psapi, main)
AC_CHECK_LIB(shell32, main)
AC_CHECK_LIB(ole32, main)
AC_CHECK_LIB(psapi, main)
AC_CHECK_LIB(shell32, main)
- set(HAVE_LIBIMAGEHLP 1)
set(HAVE_LIBPSAPI 1)
set(HAVE_LIBSHELL32 1)
# TODO: Check existence of libraries.
# include(CheckLibraryExists)
set(HAVE_LIBPSAPI 1)
set(HAVE_LIBSHELL32 1)
# TODO: Check existence of libraries.
# include(CheckLibraryExists)
- # CHECK_LIBRARY_EXISTS(imagehlp ??? . HAVE_LIBIMAGEHLP)
endif( MINGW )
if (NOT HAVE_STRTOLL)
endif( MINGW )
if (NOT HAVE_STRTOLL)
/* Define if you have the libdl library or equivalent. */
#cmakedefine HAVE_LIBDL ${HAVE_LIBDL}
/* Define if you have the libdl library or equivalent. */
#cmakedefine HAVE_LIBDL ${HAVE_LIBDL}
-/* Define to 1 if you have the `imagehlp' library (-limagehlp). */
-#cmakedefine HAVE_LIBIMAGEHLP ${HAVE_LIBIMAGEHLP}
-
/* Define to 1 if you have the `m' library (-lm). */
#undef HAVE_LIBM
/* Define to 1 if you have the `m' library (-lm). */
#undef HAVE_LIBM
/* Define if libedit is available on this platform. */
#undef HAVE_LIBEDIT
/* Define if libedit is available on this platform. */
#undef HAVE_LIBEDIT
-/* Define to 1 if you have the `imagehlp' library (-limagehlp). */
-#undef HAVE_LIBIMAGEHLP
-
/* Define to 1 if you have the `m' library (-lm). */
#undef HAVE_LIBM
/* Define to 1 if you have the `m' library (-lm). */
#undef HAVE_LIBM
set(system_libs)
if( NOT MSVC )
if( MINGW )
set(system_libs)
if( NOT MSVC )
if( MINGW )
- set(system_libs ${system_libs} imagehlp psapi shell32 ole32)
+ set(system_libs ${system_libs} psapi shell32 ole32)
elseif( CMAKE_HOST_UNIX )
if( HAVE_LIBRT )
set(system_libs ${system_libs} rt)
elseif( CMAKE_HOST_UNIX )
if( HAVE_LIBRT )
set(system_libs ${system_libs} rt)
#include <ntverp.h>
#endif
#include <ntverp.h>
#endif
-#ifdef __MINGW32__
- #if (HAVE_LIBIMAGEHLP != 1)
- #error "libimagehlp.a should be present"
- #endif
-#else
- #pragma comment(lib, "dbghelp.lib")
-#endif
-
namespace llvm {
using namespace sys;
namespace llvm {
using namespace sys;
//=== and must not be UNIX code.
//===----------------------------------------------------------------------===//
//=== and must not be UNIX code.
//===----------------------------------------------------------------------===//
+typedef BOOL (WINAPI *fpEnumerateLoadedModules)(HANDLE,PENUMLOADED_MODULES_CALLBACK64,PVOID);
+static fpEnumerateLoadedModules fEnumerateLoadedModules;
static DenseSet<HMODULE> *OpenedHandles;
static DenseSet<HMODULE> *OpenedHandles;
+static bool loadDebugHelp(void) {
+ HMODULE hLib = ::LoadLibraryW(L"Dbghelp.dll");
+ if (hLib) {
+ fEnumerateLoadedModules = (fpEnumerateLoadedModules)
+ ::GetProcAddress(hLib, "EnumerateLoadedModules64");
+ }
+ return fEnumerateLoadedModules != 0;
+}
+
-ELM_Callback(WIN32_ELMCB_PCSTR ModuleName, ULONG_PTR ModuleBase,
+ELM_Callback(WIN32_ELMCB_PCSTR ModuleName, DWORD64 ModuleBase,
ULONG ModuleSize, PVOID UserContext) {
OpenedHandles->insert((HMODULE)ModuleBase);
return TRUE;
ULONG ModuleSize, PVOID UserContext) {
OpenedHandles->insert((HMODULE)ModuleBase);
return TRUE;
if (OpenedHandles == 0)
OpenedHandles = new DenseSet<HMODULE>();
if (OpenedHandles == 0)
OpenedHandles = new DenseSet<HMODULE>();
- EnumerateLoadedModules(GetCurrentProcess(), ELM_Callback, 0);
+ if (!fEnumerateLoadedModules) {
+ if (!loadDebugHelp()) {
+ assert(false && "These APIs should always be available");
+ return DynamicLibrary();
+ }
+ }
+
+ fEnumerateLoadedModules(GetCurrentProcess(), ELM_Callback, 0);
// Dummy library that represents "search all handles".
// This is mostly to ensure that the return value still shows up as "valid".
return DynamicLibrary(&OpenedHandles);
// Dummy library that represents "search all handles".
// This is mostly to ensure that the return value still shows up as "valid".
return DynamicLibrary(&OpenedHandles);
#ifdef _MSC_VER
#pragma comment(lib, "psapi.lib")
#ifdef _MSC_VER
#pragma comment(lib, "psapi.lib")
- #pragma comment(lib, "dbghelp.lib")
- #if ((HAVE_LIBIMAGEHLP != 1) || (HAVE_LIBPSAPI != 1))
- #error "libimagehlp.a & libpsapi.a should be present"
+ #if (HAVE_LIBPSAPI != 1)
+ #error "libpsapi.a should be present"
#endif
// The version of g++ that comes with MinGW does *not* properly understand
// the ll format specifier for printf. However, MinGW passes the format
#endif
// The version of g++ that comes with MinGW does *not* properly understand
// the ll format specifier for printf. However, MinGW passes the format
DWORD64 Reserved[3];
KDHELP64 KdHelp;
} STACKFRAME64, *LPSTACKFRAME64;
DWORD64 Reserved[3];
KDHELP64 KdHelp;
} STACKFRAME64, *LPSTACKFRAME64;
+ #endif // !defined(__MINGW64_VERSION_MAJOR)
+#endif // __MINGW32__
typedef BOOL (__stdcall *PREAD_PROCESS_MEMORY_ROUTINE64)(HANDLE hProcess,
DWORD64 qwBaseAddress, PVOID lpBuffer, DWORD nSize,
typedef BOOL (__stdcall *PREAD_PROCESS_MEMORY_ROUTINE64)(HANDLE hProcess,
DWORD64 qwBaseAddress, PVOID lpBuffer, DWORD nSize,
PFUNCTION_TABLE_ACCESS_ROUTINE64,
PGET_MODULE_BASE_ROUTINE64,
PTRANSLATE_ADDRESS_ROUTINE64);
PFUNCTION_TABLE_ACCESS_ROUTINE64,
PGET_MODULE_BASE_ROUTINE64,
PTRANSLATE_ADDRESS_ROUTINE64);
-static fpStackWalk64 StackWalk64;
+static fpStackWalk64 fStackWalk64;
typedef DWORD64 (WINAPI *fpSymGetModuleBase64)(HANDLE, DWORD64);
typedef DWORD64 (WINAPI *fpSymGetModuleBase64)(HANDLE, DWORD64);
-static fpSymGetModuleBase64 SymGetModuleBase64;
+static fpSymGetModuleBase64 fSymGetModuleBase64;
typedef BOOL (WINAPI *fpSymGetSymFromAddr64)(HANDLE, DWORD64,
PDWORD64, PIMAGEHLP_SYMBOL64);
typedef BOOL (WINAPI *fpSymGetSymFromAddr64)(HANDLE, DWORD64,
PDWORD64, PIMAGEHLP_SYMBOL64);
-static fpSymGetSymFromAddr64 SymGetSymFromAddr64;
+static fpSymGetSymFromAddr64 fSymGetSymFromAddr64;
typedef BOOL (WINAPI *fpSymGetLineFromAddr64)(HANDLE, DWORD64,
PDWORD, PIMAGEHLP_LINE64);
typedef BOOL (WINAPI *fpSymGetLineFromAddr64)(HANDLE, DWORD64,
PDWORD, PIMAGEHLP_LINE64);
-static fpSymGetLineFromAddr64 SymGetLineFromAddr64;
+static fpSymGetLineFromAddr64 fSymGetLineFromAddr64;
typedef PVOID (WINAPI *fpSymFunctionTableAccess64)(HANDLE, DWORD64);
typedef PVOID (WINAPI *fpSymFunctionTableAccess64)(HANDLE, DWORD64);
-static fpSymFunctionTableAccess64 SymFunctionTableAccess64;
+static fpSymFunctionTableAccess64 fSymFunctionTableAccess64;
+
+typedef DWORD (WINAPI *fpSymSetOptions)(DWORD);
+static fpSymSetOptions fSymSetOptions;
+
+typedef BOOL (WINAPI *fpSymInitialize)(HANDLE, PCSTR, BOOL);
+static fpSymInitialize fSymInitialize;
static bool load64BitDebugHelp(void) {
HMODULE hLib = ::LoadLibraryW(L"Dbghelp.dll");
if (hLib) {
static bool load64BitDebugHelp(void) {
HMODULE hLib = ::LoadLibraryW(L"Dbghelp.dll");
if (hLib) {
- StackWalk64 = (fpStackWalk64)
+ fStackWalk64 = (fpStackWalk64)
::GetProcAddress(hLib, "StackWalk64");
::GetProcAddress(hLib, "StackWalk64");
- SymGetModuleBase64 = (fpSymGetModuleBase64)
+ fSymGetModuleBase64 = (fpSymGetModuleBase64)
::GetProcAddress(hLib, "SymGetModuleBase64");
::GetProcAddress(hLib, "SymGetModuleBase64");
- SymGetSymFromAddr64 = (fpSymGetSymFromAddr64)
+ fSymGetSymFromAddr64 = (fpSymGetSymFromAddr64)
::GetProcAddress(hLib, "SymGetSymFromAddr64");
::GetProcAddress(hLib, "SymGetSymFromAddr64");
- SymGetLineFromAddr64 = (fpSymGetLineFromAddr64)
+ fSymGetLineFromAddr64 = (fpSymGetLineFromAddr64)
::GetProcAddress(hLib, "SymGetLineFromAddr64");
::GetProcAddress(hLib, "SymGetLineFromAddr64");
- SymFunctionTableAccess64 = (fpSymFunctionTableAccess64)
+ fSymFunctionTableAccess64 = (fpSymFunctionTableAccess64)
::GetProcAddress(hLib, "SymFunctionTableAccess64");
::GetProcAddress(hLib, "SymFunctionTableAccess64");
+ fSymSetOptions = (fpSymSetOptions)::GetProcAddress(hLib, "SymSetOptions");
+ fSymInitialize = (fpSymInitialize)::GetProcAddress(hLib, "SymInitialize");
- return StackWalk64 != NULL;
+ return fStackWalk64 && fSymInitialize && fSymSetOptions;
- #endif // !defined(__MINGW64_VERSION_MAJOR)
-#endif // __MINGW32__
// Forward declare.
static LONG WINAPI LLVMUnhandledExceptionFilter(LPEXCEPTION_POINTERS ep);
// Forward declare.
static LONG WINAPI LLVMUnhandledExceptionFilter(LPEXCEPTION_POINTERS ep);
#endif
// Initialize the symbol handler.
#endif
// Initialize the symbol handler.
- SymSetOptions(SYMOPT_DEFERRED_LOADS | SYMOPT_LOAD_LINES);
- SymInitialize(hProcess, NULL, TRUE);
+ fSymSetOptions(SYMOPT_DEFERRED_LOADS | SYMOPT_LOAD_LINES);
+ fSymInitialize(hProcess, NULL, TRUE);
- if (!StackWalk64(machineType, hProcess, hThread, &StackFrame, Context, NULL,
- SymFunctionTableAccess64, SymGetModuleBase64, NULL)) {
+ if (!fStackWalk64(machineType, hProcess, hThread, &StackFrame, Context, 0,
+ fSymFunctionTableAccess64, fSymGetModuleBase64, 0)) {
static_cast<DWORD>(StackFrame.Params[3]));
#endif
// Verify the PC belongs to a module in this process.
static_cast<DWORD>(StackFrame.Params[3]));
#endif
// Verify the PC belongs to a module in this process.
- if (!SymGetModuleBase64(hProcess, PC)) {
+ if (!fSymGetModuleBase64(hProcess, PC)) {
OS << " <unknown module>\n";
continue;
}
OS << " <unknown module>\n";
continue;
}
symbol->MaxNameLength = 512 - sizeof(IMAGEHLP_SYMBOL64);
DWORD64 dwDisp;
symbol->MaxNameLength = 512 - sizeof(IMAGEHLP_SYMBOL64);
DWORD64 dwDisp;
- if (!SymGetSymFromAddr64(hProcess, PC, &dwDisp, symbol)) {
+ if (!fSymGetSymFromAddr64(hProcess, PC, &dwDisp, symbol)) {
IMAGEHLP_LINE64 line = {};
DWORD dwLineDisp;
line.SizeOfStruct = sizeof(line);
IMAGEHLP_LINE64 line = {};
DWORD dwLineDisp;
line.SizeOfStruct = sizeof(line);
- if (SymGetLineFromAddr64(hProcess, PC, &dwLineDisp, &line)) {
+ if (fSymGetLineFromAddr64(hProcess, PC, &dwLineDisp, &line)) {
OS << format(", %s, line %lu", line.FileName, line.LineNumber);
if (dwLineDisp > 0)
OS << format(" + 0x%lX byte(s)", dwLineDisp);
OS << format(", %s, line %lu", line.FileName, line.LineNumber);
if (dwLineDisp > 0)
OS << format(" + 0x%lX byte(s)", dwLineDisp);
}
static void RegisterHandler() {
}
static void RegisterHandler() {
-#if __MINGW32__ && !defined(__MINGW64_VERSION_MAJOR)
- // On MinGW.org, we need to load up the symbols explicitly, because the
- // Win32 framework they include does not have support for the 64-bit
- // versions of the APIs we need. If we cannot load up the APIs (which
- // would be unexpected as they should exist on every version of Windows
- // we support), we will bail out since there would be nothing to report.
+ // If we cannot load up the APIs (which would be unexpected as they should
+ // exist on every version of Windows we support), we will bail out since
+ // there would be nothing to report.
if (!load64BitDebugHelp()) {
assert(false && "These APIs should always be available");
return;
}
if (!load64BitDebugHelp()) {
assert(false && "These APIs should always be available");
return;
}
if (RegisteredUnhandledExceptionFilter) {
EnterCriticalSection(&CriticalSection);
if (RegisteredUnhandledExceptionFilter) {
EnterCriticalSection(&CriticalSection);
#if defined(_MSC_VER)
#include <Windows.h>
#include <DbgHelp.h>
#if defined(_MSC_VER)
#include <Windows.h>
#include <DbgHelp.h>
+#pragma comment(lib, "dbghelp.lib")