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Sweden-Number/dlls/dbghelp/dbghelp.c

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/*
* File dbghelp.c - generic routines (process) for dbghelp DLL
*
* Copyright (C) 2004, Eric Pouech
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "dbghelp_private.h"
#include "winerror.h"
#include "psapi.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
/* TODO
* - support for symbols' types is still partly missing
* + C++ support
* + funcargtype:s are (partly) wrong: they should be a specific struct (like
* typedef) pointing to the actual type (and not a direct access)
* + we should store the underlying type for an enum in the symt_enum struct
* - most options (dbghelp_options) are not used (loading lines, decoration...)
* - in symbol lookup by name, we don't use RE everywhere we should. Moreover, when
* we're supposed to use RE, it doesn't make use of our hash tables. Therefore,
* we could use hash if name isn't a RE, and fall back to a full search when we
* get a full RE
* - (un)decoration is not handled (should make winedump's code a (.a) library
* and link it to winedump, and potentially to msvcrt and dbghelp (check best
* way not to duplicate code in msvcrt & dbghelp)
* - msc:
* + we should add parameters' types to the function's signature
* while processing a function's parameters
* + get rid of MSC reading FIXME:s (lots of types are not defined)
* + C++ management
* - stabs:
* + when, in a same module, the same definition is used in several compilation
* units, we get several definitions of the same object (especially
* struct/union). we should find a way not to duplicate them
* + in some cases (dlls/user/dialog16.c DIALOG_GetControl16), the same static
* global variable is defined several times (at different scopes). We are
* getting several of those while looking for a unique symbol. Part of the
* issue is that we don't give a scope to a static variable inside a function
* + C++ management
* - implement the callback notification mechanism
*/
unsigned dbghelp_options = SYMOPT_UNDNAME;
/***********************************************************************
* DllMain (DEBUGHLP.@)
*/
BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
{
switch (fdwReason)
{
case DLL_PROCESS_ATTACH: break;
case DLL_PROCESS_DETACH: break;
case DLL_THREAD_ATTACH: break;
case DLL_THREAD_DETACH: break;
default: break;
}
return TRUE;
}
static struct process* process_first /* = NULL */;
/******************************************************************
* process_find_by_handle
*
*/
struct process* process_find_by_handle(HANDLE hProcess)
{
struct process* p;
for (p = process_first; p && p->handle != hProcess; p = p->next);
if (!p) SetLastError(ERROR_INVALID_HANDLE);
return p;
}
/******************************************************************
* SymSetSearchPath (DBGHELP.@)
*
*/
BOOL WINAPI SymSetSearchPath(HANDLE hProcess, PSTR searchPath)
{
struct process* pcs = process_find_by_handle(hProcess);
if (!pcs) return FALSE;
if (!searchPath) return FALSE;
HeapFree(GetProcessHeap(), 0, pcs->search_path);
pcs->search_path = strcpy(HeapAlloc(GetProcessHeap(), 0, strlen(searchPath) + 1),
searchPath);
return TRUE;
}
/***********************************************************************
* SymGetSearchPath (DBGHELP.@)
*/
BOOL WINAPI SymGetSearchPath(HANDLE hProcess, LPSTR szSearchPath,
DWORD SearchPathLength)
{
struct process* pcs = process_find_by_handle(hProcess);
if (!pcs) return FALSE;
strncpy(szSearchPath, pcs->search_path, SearchPathLength);
szSearchPath[SearchPathLength - 1] = '\0';
return TRUE;
}
/******************************************************************
* invade_process
*
* SymInitialize helper: loads in dbghelp all known (and loaded modules)
* this assumes that hProcess is a handle on a valid process
*/
static BOOL process_invade(HANDLE hProcess)
{
HMODULE hMods[256];
char img[256];
DWORD i, sz;
MODULEINFO mi;
if (!EnumProcessModules(hProcess, hMods, sizeof(hMods), &sz))
return FALSE; /* FIXME should grow hMods */
for (i = 0; i < sz / sizeof(HMODULE); i++)
{
if (!GetModuleInformation(hProcess, hMods[i], &mi, sizeof(mi)) ||
!GetModuleFileNameExA(hProcess, hMods[i], img, sizeof(img)) ||
!SymLoadModule(hProcess, 0, img, NULL, (DWORD)mi.lpBaseOfDll, mi.SizeOfImage))
return FALSE;
}
return sz != 0;
}
/******************************************************************
* SymInitialize (DBGHELP.@)
*
* The initialisation of a dbghelp's context.
* Note that hProcess doesn't need to be a valid process handle (except
* when fInvadeProcess is TRUE).
* Since, we're also allow to load ELF (pure) libraries and Wine ELF libraries
* containing PE (and NE) module(s), here's how we handle it:
* - we load every module (ELF, NE, PE) passed in SymLoadModule
* - in fInvadeProcess (in SymInitialize) is TRUE, we set up what is called ELF
* synchronization: hProcess should be a valid process handle, and we hook
* ourselves on hProcess's loaded ELF-modules, and keep this list in sync with
* our internal ELF modules representation (loading / unloading). This way,
* we'll pair every loaded builtin PE module with its ELF counterpart (and
* access its debug information).
* - if fInvadeProcess (in SymInitialize) is FALSE, we won't be able to
* make the peering between a builtin PE module and its ELF counterpart, hence
* we won't be able to provide the requested debug information. We'll
* however be able to load native PE modules (and their debug information)
* without any trouble.
* Note also that this scheme can be intertwined with the deferred loading
* mechanism (ie only load the debug information when we actually need it).
*/
BOOL WINAPI SymInitialize(HANDLE hProcess, PSTR UserSearchPath, BOOL fInvadeProcess)
{
struct process* pcs;
TRACE("(%p %s %u)\n", hProcess, debugstr_a(UserSearchPath), fInvadeProcess);
if (process_find_by_handle(hProcess))
FIXME("what to do ??\n");
pcs = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*pcs));
if (!pcs) return FALSE;
pcs->handle = hProcess;
if (UserSearchPath)
{
pcs->search_path = strcpy(HeapAlloc(GetProcessHeap(), 0, strlen(UserSearchPath) + 1),
UserSearchPath);
}
else
{
unsigned size;
unsigned len;
pcs->search_path = HeapAlloc(GetProcessHeap(), 0, len = MAX_PATH);
while ((size = GetCurrentDirectoryA(len, pcs->search_path)) >= len)
pcs->search_path = HeapReAlloc(GetProcessHeap(), 0, pcs->search_path, len *= 2);
pcs->search_path = HeapReAlloc(GetProcessHeap(), 0, pcs->search_path, size + 1);
len = GetEnvironmentVariableA("_NT_SYMBOL_PATH", NULL, 0);
if (len)
{
pcs->search_path = HeapReAlloc(GetProcessHeap(), 0, pcs->search_path, size + 1 + len + 1);
pcs->search_path[size] = ';';
GetEnvironmentVariableA("_NT_SYMBOL_PATH", pcs->search_path + size + 1, len);
size += 1 + len;
}
len = GetEnvironmentVariableA("_NT_ALTERNATE_SYMBOL_PATH", NULL, 0);
if (len)
{
pcs->search_path = HeapReAlloc(GetProcessHeap(), 0, pcs->search_path, size + 1 + len + 1);
pcs->search_path[size] = ';';
GetEnvironmentVariableA("_NT_ALTERNATE_SYMBOL_PATH", pcs->search_path + size + 1, len);
size += 1 + len;
}
}
pcs->lmodules = NULL;
pcs->dbg_hdr_addr = 0;
pcs->next = process_first;
process_first = pcs;
if (fInvadeProcess)
{
if (!elf_read_wine_loader_dbg_info(pcs))
{
SymCleanup(hProcess);
return FALSE;
}
process_invade(hProcess);
elf_synchronize_module_list(pcs);
}
return TRUE;
}
/******************************************************************
* SymCleanup (DBGHELP.@)
*
*/
BOOL WINAPI SymCleanup(HANDLE hProcess)
{
struct process** ppcs;
struct process* next;
for (ppcs = &process_first; *ppcs; ppcs = &(*ppcs)->next)
{
if ((*ppcs)->handle == hProcess)
{
while ((*ppcs)->lmodules) module_remove(*ppcs, (*ppcs)->lmodules);
HeapFree(GetProcessHeap(), 0, (*ppcs)->search_path);
next = (*ppcs)->next;
HeapFree(GetProcessHeap(), 0, *ppcs);
*ppcs = next;
return TRUE;
}
}
return FALSE;
}
/******************************************************************
* SymSetOptions (DBGHELP.@)
*
*/
DWORD WINAPI SymSetOptions(DWORD opts)
{
return dbghelp_options = opts;
}
/******************************************************************
* SymGetOptions (DBGHELP.@)
*
*/
DWORD WINAPI SymGetOptions(void)
{
return dbghelp_options;
}
/******************************************************************
* SymSetContext (DBGHELP.@)
*
*/
BOOL WINAPI SymSetContext(HANDLE hProcess, PIMAGEHLP_STACK_FRAME StackFrame,
PIMAGEHLP_CONTEXT Context)
{
struct process* pcs = process_find_by_handle(hProcess);
if (!pcs) return FALSE;
pcs->ctx_frame = *StackFrame;
/* MSDN states that Context is not (no longer?) used */
return TRUE;
}
/***********************************************************************
* SymRegisterCallback (DBGHELP.@)
*/
BOOL WINAPI SymRegisterCallback(HANDLE hProcess,
PSYMBOL_REGISTERED_CALLBACK CallbackFunction,
PVOID UserContext)
{
FIXME("(%p, %p, %p): stub\n", hProcess, CallbackFunction, UserContext);
SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
return FALSE;
}
/* This is imagehlp version not dbghelp !! */
static API_VERSION api_version = { 4, 0, 2, 0 };
/***********************************************************************
* ImagehlpApiVersion (DBGHELP.@)
*/
LPAPI_VERSION WINAPI ImagehlpApiVersion(VOID)
{
return &api_version;
}
/***********************************************************************
* ImagehlpApiVersionEx (DBGHELP.@)
*/
LPAPI_VERSION WINAPI ImagehlpApiVersionEx(LPAPI_VERSION AppVersion)
{
if (!AppVersion) return NULL;
AppVersion->MajorVersion = api_version.MajorVersion;
AppVersion->MinorVersion = api_version.MinorVersion;
AppVersion->Revision = api_version.Revision;
AppVersion->Reserved = api_version.Reserved;
return AppVersion;
}
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