2 * Debugger stack handling
4 * Copyright 1995 Alexandre Julliard
5 * Copyright 1996 Eric Youngdale
6 * Copyright 1999 Ove Kåven
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 #include "wine/winbase16.h"
30 #include "wine/debug.h"
33 WINE_DEFAULT_DEBUG_CHANNEL(winedbg
);
36 static IMAGEHLP_STACK_FRAME
* frames
= NULL
;
38 /***********************************************************************
41 * Dump the top of the stack
45 struct dbg_lvalue lvalue
;
48 lvalue
.type
.id
= dbg_itype_none
;
49 lvalue
.type
.module
= 0;
51 /* FIXME: we assume stack grows the same way as on i386 */
52 if (!memory_get_current_stack(&lvalue
.addr
))
53 dbg_printf("Bad segment (%d)\n", lvalue
.addr
.Segment
);
55 dbg_printf("Stack dump:\n");
56 switch (lvalue
.addr
.Mode
)
58 case AddrModeFlat
: /* 32-bit mode */
59 case AddrMode1632
: /* 32-bit mode */
60 memory_examine(&lvalue
, 24, 'x');
62 case AddrModeReal
: /* 16-bit mode */
64 memory_examine(&lvalue
, 24, 'w');
69 int stack_set_frame(int newframe
)
73 dbg_curr_frame
= newframe
;
74 if (dbg_curr_frame
>= nframe
) dbg_curr_frame
= nframe
- 1;
75 if (dbg_curr_frame
< 0) dbg_curr_frame
= 0;
77 addr
.Mode
= AddrModeFlat
;
78 addr
.Offset
= frames
[dbg_curr_frame
].InstructionOffset
;
79 source_list_from_addr(&addr
, 0);
83 int stack_get_frame(SYMBOL_INFO
* symbol
, IMAGEHLP_STACK_FRAME
* ihsf
)
87 * If we don't have a valid backtrace, then just return.
89 if (frames
== NULL
) return FALSE
;
92 * If we don't know what the current function is, then we also have
93 * nothing to report here.
95 if (!SymFromAddr(dbg_curr_process
->handle
, frames
[dbg_curr_frame
].InstructionOffset
,
98 if (ihsf
) *ihsf
= frames
[dbg_curr_frame
];
103 void stack_backtrace(DWORD tid
, BOOL noisy
)
106 CONTEXT saved_dbg_context
;
107 struct dbg_thread
* thread
;
110 if (tid
== -1) /* backtrace every thread in every process except the debugger itself, invoking via "bt all" */
113 HANDLE snapshot
= CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD
, 0);
115 if (snapshot
== INVALID_HANDLE_VALUE
)
117 dbg_printf("unable to create toolhelp snapshot\n");
121 entry
.dwSize
= sizeof(entry
);
123 if (!Thread32First(snapshot
, &entry
))
125 CloseHandle(snapshot
);
131 if (entry
.th32OwnerProcessID
== GetCurrentProcessId()) continue;
132 if (dbg_curr_process
) dbg_detach_debuggee();
135 if (!dbg_attach_debuggee(entry
.th32OwnerProcessID
, FALSE
, TRUE
))
137 dbg_printf("\nwarning: could not attach to 0x%lx\n", entry
.th32OwnerProcessID
);
141 dbg_printf("Backtracing for thread 0x%lx in process 0x%lx (%s):\n", entry
.th32ThreadID
, dbg_curr_pid
, dbg_curr_process
->imageName
);
143 stack_backtrace(entry
.th32ThreadID
, TRUE
);
145 while (Thread32Next(snapshot
, &entry
));
147 if (dbg_curr_process
) dbg_detach_debuggee();
148 CloseHandle(snapshot
);
152 if (!dbg_curr_process
)
154 dbg_printf("You must be attached to a process to run this command.\n");
158 saved_dbg_context
= dbg_context
; /* as we may modify dbg_context... */
159 if (tid
== dbg_curr_tid
)
161 thread
= dbg_curr_thread
;
162 HeapFree(GetProcessHeap(), 0, frames
);
167 thread
= dbg_get_thread(dbg_curr_process
, tid
);
170 dbg_printf("Unknown thread id (0x%08lx) in current process\n", tid
);
173 memset(&dbg_context
, 0, sizeof(dbg_context
));
174 dbg_context
.ContextFlags
= CONTEXT_FULL
;
175 if (SuspendThread(thread
->handle
) != -1)
177 if (!GetThreadContext(thread
->handle
, &dbg_context
))
179 dbg_printf("Can't get context for thread 0x%lx in current process\n",
181 ResumeThread(thread
->handle
);
187 dbg_printf("Can't suspend thread 0x%lx in current process\n", tid
);
193 memset(&sf
, 0, sizeof(sf
));
194 memory_get_current_frame(&sf
.AddrFrame
);
195 memory_get_current_pc(&sf
.AddrPC
);
197 /* don't confuse StackWalk by passing in inconsistent addresses */
198 if ((sf
.AddrPC
.Mode
== AddrModeFlat
) && (sf
.AddrFrame
.Mode
!= AddrModeFlat
))
200 sf
.AddrFrame
.Offset
= (DWORD
)memory_to_linear_addr(&sf
.AddrFrame
);
201 sf
.AddrFrame
.Mode
= AddrModeFlat
;
204 if (noisy
) dbg_printf("Backtrace:\n");
205 while (StackWalk(IMAGE_FILE_MACHINE_I386
, dbg_curr_process
->handle
,
206 thread
->handle
, &sf
, &dbg_context
, NULL
, SymFunctionTableAccess
,
207 SymGetModuleBase
, NULL
))
209 if (tid
== dbg_curr_tid
)
211 frames
= dbg_heap_realloc(frames
,
212 (nf
+ 1) * sizeof(IMAGEHLP_STACK_FRAME
));
214 frames
[nf
].InstructionOffset
= (unsigned long)memory_to_linear_addr(&sf
.AddrPC
);
215 frames
[nf
].FrameOffset
= (unsigned long)memory_to_linear_addr(&sf
.AddrFrame
);
220 (tid
== dbg_curr_tid
&& nf
== dbg_curr_frame
? "=>" : " "),
222 print_addr_and_args(&sf
.AddrPC
, &sf
.AddrFrame
);
224 print_bare_address(&sf
.AddrFrame
);
228 /* we've probably gotten ourselves into an infinite loop so bail */
233 dbg_context
= saved_dbg_context
;
234 if (tid
== dbg_curr_tid
)
240 ResumeThread(thread
->handle
);