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/**************************************************************************
*
* Copyright 2009 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/**
* @file
* Symbol lookup.
*
* @author Jose Fonseca <jfonseca@vmware.com>
*/
#include "pipe/p_compiler.h"
#include "os/os_thread.h"
#include "u_string.h"
#include "u_debug.h"
#include "u_debug_symbol.h"
#include "u_hash_table.h"
#if defined(PIPE_SUBSYSTEM_WINDOWS_USER) && defined(PIPE_ARCH_X86)
#include <windows.h>
#include <stddef.h>
#include <imagehlp.h>
/*
* TODO: Cleanup code.
* TODO: Support x86_64
*/
static BOOL bSymInitialized = FALSE;
static HMODULE hModule_Imagehlp = NULL;
typedef BOOL (WINAPI *PFNSYMINITIALIZE)(HANDLE, LPSTR, BOOL);
static PFNSYMINITIALIZE pfnSymInitialize = NULL;
static
BOOL WINAPI j_SymInitialize(HANDLE hProcess, PSTR UserSearchPath, BOOL fInvadeProcess)
{
if(
(hModule_Imagehlp || (hModule_Imagehlp = LoadLibraryA("IMAGEHLP.DLL"))) &&
(pfnSymInitialize || (pfnSymInitialize = (PFNSYMINITIALIZE) GetProcAddress(hModule_Imagehlp, "SymInitialize")))
)
return pfnSymInitialize(hProcess, UserSearchPath, fInvadeProcess);
else
return FALSE;
}
typedef DWORD (WINAPI *PFNSYMSETOPTIONS)(DWORD);
static PFNSYMSETOPTIONS pfnSymSetOptions = NULL;
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;
}
typedef PGET_MODULE_BASE_ROUTINE PFNSYMGETMODULEBASE;
static PFNSYMGETMODULEBASE pfnSymGetModuleBase = NULL;
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;
}
typedef BOOL (WINAPI *PFNSYMGETSYMFROMADDR)(HANDLE, DWORD, LPDWORD, PIMAGEHLP_SYMBOL);
static PFNSYMGETSYMFROMADDR pfnSymGetSymFromAddr = 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;
}
static INLINE void
debug_symbol_name_imagehlp(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 */
hProcess = GetCurrentProcess();
pSymbol->SizeOfStruct = sizeof(symbolBuffer);
pSymbol->MaxNameLength = sizeof(symbolBuffer) - offsetof(IMAGEHLP_SYMBOL, Name);
if(!bSymInitialized) {
j_SymSetOptions(/* SYMOPT_UNDNAME | */ SYMOPT_LOAD_LINES);
if(j_SymInitialize(hProcess, NULL, TRUE))
bSymInitialized = TRUE;
}
if(!j_SymGetSymFromAddr(hProcess, (DWORD)addr, &dwDisplacement, pSymbol))
buf[0] = 0;
else
{
strncpy(buf, pSymbol->Name, size);
buf[size - 1] = 0;
}
}
#endif
#ifdef __GLIBC__
#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 void
debug_symbol_name_glibc(const void *addr, char* buf, unsigned size)
{
char** syms = backtrace_symbols((void**)&addr, 1);
strncpy(buf, syms[0], size);
buf[size - 1] = 0;
free(syms);
}
#endif
void
debug_symbol_name(const void *addr, char* buf, unsigned size)
{
#if defined(PIPE_SUBSYSTEM_WINDOWS_USER) && defined(PIPE_ARCH_X86)
debug_symbol_name_imagehlp(addr, buf, size);
if(buf[0])
return;
#endif
#ifdef __GLIBC__
debug_symbol_name_glibc(addr, buf, size);
if(buf[0])
return;
#endif
util_snprintf(buf, size, "%p", addr);
buf[size - 1] = 0;
}
void
debug_symbol_print(const void *addr)
{
char buf[1024];
debug_symbol_name(addr, buf, sizeof(buf));
debug_printf("\t%s\n", buf);
}
struct util_hash_table* symbols_hash;
pipe_mutex symbols_mutex;
static unsigned hash_ptr(void* p)
{
return (unsigned)(uintptr_t)p;
}
static int compare_ptr(void* a, void* b)
{
if(a == b)
return 0;
else if(a < b)
return -1;
else
return 1;
}
const char*
debug_symbol_name_cached(const void *addr)
{
const char* name;
pipe_mutex_lock(symbols_mutex);
if(!symbols_hash)
symbols_hash = util_hash_table_create(hash_ptr, compare_ptr);
name = util_hash_table_get(symbols_hash, (void*)addr);
if(!name)
{
char buf[1024];
debug_symbol_name(addr, buf, sizeof(buf));
name = strdup(buf);
util_hash_table_set(symbols_hash, (void*)addr, (void*)name);
}
pipe_mutex_unlock(symbols_mutex);
return name;
}
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