X-Git-Url: https://git.libre-soc.org/?p=mesa.git;a=blobdiff_plain;f=src%2Fgallium%2Fauxiliary%2Futil%2Fu_debug_symbol.c;h=73225e9e49544ed443c7696f1c5da2099f633207;hp=6e250575d66756592a7cfc03aca502724e1685a6;hb=e487043fd09a2307f868ebcba50abcafe0a2d4fe;hpb=431a51b9af32980ae8a544d129bf567287887376

diff --git a/src/gallium/auxiliary/util/u_debug_symbol.c b/src/gallium/auxiliary/util/u_debug_symbol.c
index 6e250575d66..73225e9e495 100644
--- a/src/gallium/auxiliary/util/u_debug_symbol.c
+++ b/src/gallium/auxiliary/util/u_debug_symbol.c
@@ -33,123 +33,274 @@
  */
 
 #include "pipe/p_compiler.h"
+#include "os/os_thread.h"
+#include "util/u_string.h"
 
-#include "u_debug.h"
+#include "util/u_debug.h"
 #include "u_debug_symbol.h"
+#include "util/hash_table.h"
 
-#if defined(PIPE_SUBSYSTEM_WINDOWS_USER) && defined(PIPE_ARCH_X86)
+
+#if defined(PIPE_OS_WINDOWS)
    
 #include <windows.h>
 #include <stddef.h>
-#include <imagehlp.h>
 
-/*
- * TODO: Cleanup code.
- * TODO: Support x86_64 
- */
+#include "dbghelp.h"
 
-static BOOL bSymInitialized = FALSE;
 
-static HMODULE hModule_Imagehlp = NULL;
+/**
+ * SymInitialize() must be called once for each process (in this case, the
+ * current process), before any of the other functions can be called.
+ */
+static BOOL g_bSymInitialized = FALSE;
 
-typedef BOOL (WINAPI *PFNSYMINITIALIZE)(HANDLE, LPSTR, BOOL);
-static PFNSYMINITIALIZE pfnSymInitialize = NULL;
 
-static
-BOOL WINAPI j_SymInitialize(HANDLE hProcess, PSTR UserSearchPath, BOOL fInvadeProcess)
+/**
+ * Lookup the address of a DbgHelp function.
+ */
+static FARPROC WINAPI
+getDbgHelpProcAddress(LPCSTR lpProcName)
 {
-   if(
-      (hModule_Imagehlp || (hModule_Imagehlp = LoadLibraryA("IMAGEHLP.DLL"))) &&
-      (pfnSymInitialize || (pfnSymInitialize = (PFNSYMINITIALIZE) GetProcAddress(hModule_Imagehlp, "SymInitialize")))
-   )
-      return pfnSymInitialize(hProcess, UserSearchPath, fInvadeProcess);
-   else
-      return FALSE;
-}
+   static HMODULE hModule = NULL;
 
-typedef DWORD (WINAPI *PFNSYMSETOPTIONS)(DWORD);
-static PFNSYMSETOPTIONS pfnSymSetOptions = NULL;
+   if (!hModule) {
+      static boolean bail = FALSE;
 
-static
-DWORD WINAPI j_SymSetOptions(DWORD SymOptions)
-{
-   if(
-      (hModule_Imagehlp || (hModule_Imagehlp = LoadLibraryA("IMAGEHLP.DLL"))) &&
-      (pfnSymSetOptions || (pfnSymSetOptions = (PFNSYMSETOPTIONS) GetProcAddress(hModule_Imagehlp, "SymSetOptions")))
-   )
-      return pfnSymSetOptions(SymOptions);
-   else
-      return FALSE;
-}
+      if (bail) {
+         return NULL;
+      }
 
-typedef PGET_MODULE_BASE_ROUTINE PFNSYMGETMODULEBASE;
-static PFNSYMGETMODULEBASE pfnSymGetModuleBase = NULL;
+#ifdef PIPE_CC_GCC
+      /*
+       * DbgHelp does not understand the debug information generated by MinGW toolchain.
+       *
+       * mgwhelp.dll is a dbghelp.dll look-alike replacement, which is able to
+       * understand MinGW symbols, including on 64-bit builds.
+       */
+      if (!hModule) {
+         hModule = LoadLibraryA("mgwhelp.dll");
+         if (!hModule) {
+            _debug_printf("warning: mgwhelp.dll not found: symbol names will not be resolved\n"
+                          "warning: download it from https://github.com/jrfonseca/drmingw/#mgwhelp\n");
+         }
+      }
+#endif
 
-static
-DWORD WINAPI j_SymGetModuleBase(HANDLE hProcess, DWORD dwAddr)
-{
-   if(
-      (hModule_Imagehlp || (hModule_Imagehlp = LoadLibraryA("IMAGEHLP.DLL"))) &&
-      (pfnSymGetModuleBase || (pfnSymGetModuleBase = (PFNSYMGETMODULEBASE) GetProcAddress(hModule_Imagehlp, "SymGetModuleBase")))
-   )
-      return pfnSymGetModuleBase(hProcess, dwAddr);
-   else
-      return 0;
-}
+      /*
+       * Fallback to the real DbgHelp.
+       */
+      if (!hModule) {
+         hModule = LoadLibraryA("dbghelp.dll");
+      }
 
-typedef BOOL (WINAPI *PFNSYMGETSYMFROMADDR)(HANDLE, DWORD, LPDWORD, PIMAGEHLP_SYMBOL);
-static PFNSYMGETSYMFROMADDR pfnSymGetSymFromAddr = NULL;
+      if (!hModule) {
+         bail = TRUE;
+         return NULL;
+      }
+   }
 
-static
-BOOL WINAPI j_SymGetSymFromAddr(HANDLE hProcess, DWORD Address, PDWORD Displacement, PIMAGEHLP_SYMBOL Symbol)
-{
-   if(
-      (hModule_Imagehlp || (hModule_Imagehlp = LoadLibraryA("IMAGEHLP.DLL"))) &&
-      (pfnSymGetSymFromAddr || (pfnSymGetSymFromAddr = (PFNSYMGETSYMFROMADDR) GetProcAddress(hModule_Imagehlp, "SymGetSymFromAddr")))
-   )
-      return pfnSymGetSymFromAddr(hProcess, Address, Displacement, Symbol);
-   else
-      return FALSE;
+   return GetProcAddress(hModule, lpProcName);
 }
 
 
-static INLINE boolean
-debug_symbol_print_imagehlp(const void *addr)
+/**
+ * Generic macro to dispatch a DbgHelp functions.
+ */
+#define DBGHELP_DISPATCH(_name, _ret_type, _ret_default, _arg_types, _arg_names) \
+   static _ret_type WINAPI \
+   j_##_name _arg_types \
+   { \
+      typedef BOOL (WINAPI *PFN) _arg_types; \
+      static PFN pfn = NULL; \
+      if (!pfn) { \
+         pfn = (PFN) getDbgHelpProcAddress(#_name); \
+         if (!pfn) { \
+            return _ret_default; \
+         } \
+      } \
+      return pfn _arg_names; \
+   }
+
+DBGHELP_DISPATCH(SymInitialize,
+                 BOOL, 0,
+                 (HANDLE hProcess, PSTR UserSearchPath, BOOL fInvadeProcess),
+                 (hProcess, UserSearchPath, fInvadeProcess))
+
+DBGHELP_DISPATCH(SymSetOptions,
+                 DWORD, FALSE,
+                 (DWORD SymOptions),
+                 (SymOptions))
+
+DBGHELP_DISPATCH(SymFromAddr,
+                 BOOL, FALSE,
+                 (HANDLE hProcess, DWORD64 Address, PDWORD64 Displacement, PSYMBOL_INFO Symbol),
+                 (hProcess, Address, Displacement, Symbol))
+
+DBGHELP_DISPATCH(SymGetLineFromAddr64,
+                 BOOL, FALSE,
+                 (HANDLE hProcess, DWORD64 dwAddr, PDWORD pdwDisplacement, PIMAGEHLP_LINE64 Line),
+                 (hProcess, dwAddr, pdwDisplacement, Line))
+
+
+#undef DBGHELP_DISPATCH
+
+
+static inline boolean
+debug_symbol_name_dbghelp(const void *addr, char* buf, unsigned size)
 {
-   HANDLE hProcess;
-   BYTE symbolBuffer[1024];
-   PIMAGEHLP_SYMBOL pSymbol = (PIMAGEHLP_SYMBOL) symbolBuffer;
-   DWORD dwDisplacement = 0;  /* Displacement of the input address, relative to the start of the symbol */
+   DWORD64 dwAddr = (DWORD64)(uintptr_t)addr;
+   HANDLE hProcess = GetCurrentProcess();
 
-   hProcess = GetCurrentProcess();
+   /* General purpose buffer, to back pSymbol and other temporary stuff.
+    * Must not be too memory hungry here to avoid stack overflows.
+    */
+   CHAR buffer[512];
 
-   pSymbol->SizeOfStruct = sizeof(symbolBuffer);
-   pSymbol->MaxNameLength = sizeof(symbolBuffer) - offsetof(IMAGEHLP_SYMBOL, Name);
+   PSYMBOL_INFO pSymbol = (PSYMBOL_INFO) buffer;
+   DWORD64 dwDisplacement = 0;  /* Displacement of the input address, relative to the start of the symbol */
+   DWORD dwLineDisplacement = 0;
+   IMAGEHLP_LINE64 Line;
 
-   if(!bSymInitialized) {
+   memset(pSymbol, 0, sizeof *pSymbol);
+   pSymbol->SizeOfStruct = sizeof buffer;
+   pSymbol->MaxNameLen = sizeof buffer - offsetof(SYMBOL_INFO, Name);
+
+   if (!g_bSymInitialized) {
       j_SymSetOptions(/* SYMOPT_UNDNAME | */ SYMOPT_LOAD_LINES);
-      if(j_SymInitialize(hProcess, NULL, TRUE))
-         bSymInitialized = TRUE;
+      if (j_SymInitialize(hProcess, NULL, TRUE)) {
+         g_bSymInitialized = TRUE;
+      }
    }
-      
-   if(!j_SymGetSymFromAddr(hProcess, (DWORD)addr, &dwDisplacement, pSymbol))
-      return FALSE;
 
-   debug_printf("\t%s\n", pSymbol->Name);
+   /* Lookup symbol name */
+   if (!g_bSymInitialized ||
+       !j_SymFromAddr(hProcess, dwAddr, &dwDisplacement, pSymbol)) {
+      /*
+       * We couldn't obtain symbol information.  At least tell which module the address belongs.
+       */
+
+      HMODULE hModule = NULL;
+
+      if (!GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
+                             (LPCTSTR)addr,
+                             &hModule)) {
+         return FALSE;
+      }
+
+      if (GetModuleFileNameA(hModule, buffer, sizeof buffer) == sizeof buffer) {
+         return FALSE;
+      }
+      snprintf(buf, size, "%p at %s+0x%lx",
+               addr, buffer,
+               (unsigned long)((uintptr_t)addr - (uintptr_t)hModule));
+
+      return TRUE;
+   }
+
+   /*
+    * Try to get filename and line number.
+    */
+   memset(&Line, 0, sizeof Line);
+   Line.SizeOfStruct = sizeof Line;
+   if (!j_SymGetLineFromAddr64(hProcess, dwAddr, &dwLineDisplacement, &Line)) {
+      Line.FileName = NULL;
+   }
+
+   if (Line.FileName) {
+      snprintf(buf, size, "%s at %s:%lu", pSymbol->Name, Line.FileName, Line.LineNumber);
+   } else {
+      snprintf(buf, size, "%s", pSymbol->Name);
+   }
 
    return TRUE;
-   
 }
+
+#endif /* PIPE_OS_WINDOWS */
+
+
+#if defined(HAVE_EXECINFO_H)
+
+#include <execinfo.h>
+
+/* This can only provide dynamic symbols, or binary offsets into a file.
+ *
+ * To fix this, post-process the output with tools/addr2line.sh
+ */
+static inline boolean
+debug_symbol_name_glibc(const void *addr, char* buf, unsigned size)
+{
+   char** syms = backtrace_symbols((void**)&addr, 1);
+   if (!syms) {
+      return FALSE;
+   }
+   strncpy(buf, syms[0], size - 1);
+   buf[size - 1] = 0;
+   free(syms);
+   return TRUE;
+}
+
+#endif /* defined(HAVE_EXECINFO_H) */
+
+
+void
+debug_symbol_name(const void *addr, char* buf, unsigned size)
+{
+#if defined(PIPE_OS_WINDOWS)
+   if (debug_symbol_name_dbghelp(addr, buf, size)) {
+      return;
+   }
 #endif
 
+#if defined(HAVE_EXECINFO_H)
+   if (debug_symbol_name_glibc(addr, buf, size)) {
+       return;
+   }
+#endif /* defined(HAVE_EXECINFO_H) */
+
+   snprintf(buf, size, "%p", addr);
+   buf[size - 1] = 0;
+}
 
 void
 debug_symbol_print(const void *addr)
 {
-#if defined(PIPE_SUBSYSTEM_WINDOWS_USER) && defined(PIPE_ARCH_X86)
-   if(debug_symbol_print_imagehlp(addr))
-      return;
+   char buf[1024];
+   debug_symbol_name(addr, buf, sizeof(buf));
+   debug_printf("\t%s\n", buf);
+}
+
+static struct hash_table* symbols_hash;
+#ifdef PIPE_OS_WINDOWS
+static mtx_t symbols_mutex;
+#else
+static mtx_t symbols_mutex = _MTX_INITIALIZER_NP;
 #endif
-   
-   debug_printf("\t%p\n", addr);
+
+const char*
+debug_symbol_name_cached(const void *addr)
+{
+   const char* name;
+#ifdef PIPE_OS_WINDOWS
+   static boolean first = TRUE;
+
+   if (first) {
+      (void) mtx_init(&symbols_mutex, mtx_plain);
+      first = FALSE;
+   }
+#endif
+
+   mtx_lock(&symbols_mutex);
+   if(!symbols_hash)
+      symbols_hash = _mesa_pointer_hash_table_create(NULL);
+   struct hash_entry *entry = _mesa_hash_table_search(symbols_hash, addr);
+   if (!entry) {
+      char buf[1024];
+      debug_symbol_name(addr, buf, sizeof(buf));
+      name = strdup(buf);
+
+      entry = _mesa_hash_table_insert(symbols_hash, addr, (void*)name);
+   }
+   mtx_unlock(&symbols_mutex);
+   return entry->data;
 }