2 * File dbghelp.c - generic routines (process) for dbghelp DLL
4 * Copyright (C) 2004, Eric Pouech
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include "dbghelp_private.h"
26 #include "wine/debug.h"
28 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
31 * - support for symbols' types is still partly missing
33 * + funcargtype:s are (partly) wrong: they should be a specific struct (like
34 * typedef) pointing to the actual type (and not a direct access)
35 * + we should store the underlying type for an enum in the symt_enum struct
36 * + for enums, we store the names & values (associated to the enum type),
37 * but those values are not directly usable from a debugger (that's why, I
38 * assume, that we have also to define constants for enum values, as
40 * + SymGetType(TI_GET_LENGTH) takes a ULONG64 (yurk, ugly)
41 * - SymGetLine{Next|Prev} don't work as expected (they don't seem to work across
42 * functions, and even across function blocks...). Basically, for *Next* to work
43 * it requires an address after the prolog of the func (the base address of the
45 * - most options (dbghelp_options) are not used (loading lines...)
46 * - in symbol lookup by name, we don't use RE everywhere we should. Moreover, when
47 * we're supposed to use RE, it doesn't make use of our hash tables. Therefore,
48 * we could use hash if name isn't a RE, and fall back to a full search when we
51 * + we should add parameters' types to the function's signature
52 * while processing a function's parameters
53 * + add support for function-less labels (as MSC seems to define them)
56 * + when, in a same module, the same definition is used in several compilation
57 * units, we get several definitions of the same object (especially
58 * struct/union). we should find a way not to duplicate them
59 * + in some cases (dlls/user/dialog16.c DIALOG_GetControl16), the same static
60 * global variable is defined several times (at different scopes). We are
61 * getting several of those while looking for a unique symbol. Part of the
62 * issue is that we don't give a scope to a static variable inside a function
64 * - implement the callback notification mechanism
67 unsigned dbghelp_options = SYMOPT_UNDNAME;
68 HANDLE hMsvcrt = NULL;
70 /***********************************************************************
71 * DllMain (DEBUGHLP.@)
73 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
77 case DLL_PROCESS_ATTACH: break;
78 case DLL_PROCESS_DETACH:
79 if (hMsvcrt) FreeLibrary(hMsvcrt);
81 case DLL_THREAD_ATTACH: break;
82 case DLL_THREAD_DETACH: break;
88 static struct process* process_first /* = NULL */;
90 /******************************************************************
91 * process_find_by_handle
94 struct process* process_find_by_handle(HANDLE hProcess)
98 for (p = process_first; p && p->handle != hProcess; p = p->next);
99 if (!p) SetLastError(ERROR_INVALID_HANDLE);
103 /******************************************************************
104 * SymSetSearchPath (DBGHELP.@)
107 BOOL WINAPI SymSetSearchPath(HANDLE hProcess, PSTR searchPath)
109 struct process* pcs = process_find_by_handle(hProcess);
111 if (!pcs) return FALSE;
112 if (!searchPath) return FALSE;
114 HeapFree(GetProcessHeap(), 0, pcs->search_path);
115 pcs->search_path = strcpy(HeapAlloc(GetProcessHeap(), 0, strlen(searchPath) + 1),
120 /***********************************************************************
121 * SymGetSearchPath (DBGHELP.@)
123 BOOL WINAPI SymGetSearchPath(HANDLE hProcess, LPSTR szSearchPath,
124 DWORD SearchPathLength)
126 struct process* pcs = process_find_by_handle(hProcess);
127 if (!pcs) return FALSE;
129 lstrcpynA(szSearchPath, pcs->search_path, SearchPathLength);
133 /******************************************************************
136 * SymInitialize helper: loads in dbghelp all known (and loaded modules)
137 * this assumes that hProcess is a handle on a valid process
139 static BOOL WINAPI process_invade_cb(char* name, DWORD base, DWORD size, void* user)
142 HANDLE hProcess = (HANDLE)user;
144 if (!GetModuleFileNameExA(hProcess, (HMODULE)base,
146 lstrcpynA(tmp, name, sizeof(tmp));
148 SymLoadModule(hProcess, 0, tmp, name, base, size);
152 /******************************************************************
153 * SymInitialize (DBGHELP.@)
155 * The initialisation of a dbghelp's context.
156 * Note that hProcess doesn't need to be a valid process handle (except
157 * when fInvadeProcess is TRUE).
158 * Since, we're also allow to load ELF (pure) libraries and Wine ELF libraries
159 * containing PE (and NE) module(s), here's how we handle it:
160 * - we load every module (ELF, NE, PE) passed in SymLoadModule
161 * - in fInvadeProcess (in SymInitialize) is TRUE, we set up what is called ELF
162 * synchronization: hProcess should be a valid process handle, and we hook
163 * ourselves on hProcess's loaded ELF-modules, and keep this list in sync with
164 * our internal ELF modules representation (loading / unloading). This way,
165 * we'll pair every loaded builtin PE module with its ELF counterpart (and
166 * access its debug information).
167 * - if fInvadeProcess (in SymInitialize) is FALSE, we won't be able to
168 * make the peering between a builtin PE module and its ELF counterpart, hence
169 * we won't be able to provide the requested debug information. We'll
170 * however be able to load native PE modules (and their debug information)
171 * without any trouble.
172 * Note also that this scheme can be intertwined with the deferred loading
173 * mechanism (ie only load the debug information when we actually need it).
175 BOOL WINAPI SymInitialize(HANDLE hProcess, PSTR UserSearchPath, BOOL fInvadeProcess)
179 TRACE("(%p %s %u)\n", hProcess, debugstr_a(UserSearchPath), fInvadeProcess);
181 if (process_find_by_handle(hProcess))
182 FIXME("what to do ??\n");
184 pcs = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*pcs));
185 if (!pcs) return FALSE;
187 pcs->handle = hProcess;
191 pcs->search_path = strcpy(HeapAlloc(GetProcessHeap(), 0, strlen(UserSearchPath) + 1),
199 pcs->search_path = HeapAlloc(GetProcessHeap(), 0, len = MAX_PATH);
200 while ((size = GetCurrentDirectoryA(len, pcs->search_path)) >= len)
201 pcs->search_path = HeapReAlloc(GetProcessHeap(), 0, pcs->search_path, len *= 2);
202 pcs->search_path = HeapReAlloc(GetProcessHeap(), 0, pcs->search_path, size + 1);
204 len = GetEnvironmentVariableA("_NT_SYMBOL_PATH", NULL, 0);
207 pcs->search_path = HeapReAlloc(GetProcessHeap(), 0, pcs->search_path, size + 1 + len + 1);
208 pcs->search_path[size] = ';';
209 GetEnvironmentVariableA("_NT_SYMBOL_PATH", pcs->search_path + size + 1, len);
212 len = GetEnvironmentVariableA("_NT_ALTERNATE_SYMBOL_PATH", NULL, 0);
215 pcs->search_path = HeapReAlloc(GetProcessHeap(), 0, pcs->search_path, size + 1 + len + 1);
216 pcs->search_path[size] = ';';
217 GetEnvironmentVariableA("_NT_ALTERNATE_SYMBOL_PATH", pcs->search_path + size + 1, len);
222 pcs->lmodules = NULL;
223 pcs->dbg_hdr_addr = 0;
224 pcs->next = process_first;
229 if (!elf_read_wine_loader_dbg_info(pcs))
231 SymCleanup(hProcess);
234 EnumerateLoadedModules(hProcess, process_invade_cb, (void*)hProcess);
235 elf_synchronize_module_list(pcs);
241 /******************************************************************
242 * SymCleanup (DBGHELP.@)
245 BOOL WINAPI SymCleanup(HANDLE hProcess)
247 struct process** ppcs;
248 struct process* next;
250 for (ppcs = &process_first; *ppcs; ppcs = &(*ppcs)->next)
252 if ((*ppcs)->handle == hProcess)
254 while ((*ppcs)->lmodules) module_remove(*ppcs, (*ppcs)->lmodules);
256 HeapFree(GetProcessHeap(), 0, (*ppcs)->search_path);
257 next = (*ppcs)->next;
258 HeapFree(GetProcessHeap(), 0, *ppcs);
266 /******************************************************************
267 * SymSetOptions (DBGHELP.@)
270 DWORD WINAPI SymSetOptions(DWORD opts)
272 return dbghelp_options = opts;
275 /******************************************************************
276 * SymGetOptions (DBGHELP.@)
279 DWORD WINAPI SymGetOptions(void)
281 return dbghelp_options;
284 /******************************************************************
285 * SymSetContext (DBGHELP.@)
288 BOOL WINAPI SymSetContext(HANDLE hProcess, PIMAGEHLP_STACK_FRAME StackFrame,
289 PIMAGEHLP_CONTEXT Context)
291 struct process* pcs = process_find_by_handle(hProcess);
292 if (!pcs) return FALSE;
294 pcs->ctx_frame = *StackFrame;
295 /* MSDN states that Context is not (no longer?) used */
299 /***********************************************************************
300 * SymRegisterCallback (DBGHELP.@)
302 BOOL WINAPI SymRegisterCallback(HANDLE hProcess,
303 PSYMBOL_REGISTERED_CALLBACK CallbackFunction,
306 FIXME("(%p, %p, %p): stub\n", hProcess, CallbackFunction, UserContext);
307 SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
311 /* This is imagehlp version not dbghelp !! */
312 static API_VERSION api_version = { 4, 0, 2, 0 };
314 /***********************************************************************
315 * ImagehlpApiVersion (DBGHELP.@)
317 LPAPI_VERSION WINAPI ImagehlpApiVersion(VOID)
322 /***********************************************************************
323 * ImagehlpApiVersionEx (DBGHELP.@)
325 LPAPI_VERSION WINAPI ImagehlpApiVersionEx(LPAPI_VERSION AppVersion)
327 if (!AppVersion) return NULL;
329 AppVersion->MajorVersion = api_version.MajorVersion;
330 AppVersion->MinorVersion = api_version.MinorVersion;
331 AppVersion->Revision = api_version.Revision;
332 AppVersion->Reserved = api_version.Reserved;