Sweden-Number/programs/winedbg/stack.c

243 lines
7.1 KiB
C

/*
* Debugger stack handling
*
* Copyright 1995 Alexandre Julliard
* Copyright 1996 Eric Youngdale
* Copyright 1999 Ove Kåven
*
* 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 <stdlib.h>
#include "debugger.h"
#include "stackframe.h"
#include "winbase.h"
#include "wine/debug.h"
#include "tlhelp32.h"
WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
static int nframe;
static IMAGEHLP_STACK_FRAME* frames = NULL;
/***********************************************************************
* stack_info
*
* Dump the top of the stack
*/
void stack_info(void)
{
struct dbg_lvalue lvalue;
lvalue.cookie = 0;
lvalue.type.id = dbg_itype_none;
lvalue.type.module = 0;
/* FIXME: we assume stack grows the same way as on i386 */
if (!memory_get_current_stack(&lvalue.addr))
dbg_printf("Bad segment (%d)\n", lvalue.addr.Segment);
dbg_printf("Stack dump:\n");
switch (lvalue.addr.Mode)
{
case AddrModeFlat: /* 32-bit mode */
case AddrMode1632: /* 32-bit mode */
memory_examine(&lvalue, 24, 'x');
break;
case AddrModeReal: /* 16-bit mode */
case AddrMode1616:
memory_examine(&lvalue, 24, 'w');
break;
}
}
int stack_set_frame(int newframe)
{
ADDRESS addr;
dbg_curr_frame = newframe;
if (dbg_curr_frame >= nframe) dbg_curr_frame = nframe - 1;
if (dbg_curr_frame < 0) dbg_curr_frame = 0;
addr.Mode = AddrModeFlat;
addr.Offset = frames[dbg_curr_frame].InstructionOffset;
source_list_from_addr(&addr, 0);
return TRUE;
}
int stack_get_frame(SYMBOL_INFO* symbol, IMAGEHLP_STACK_FRAME* ihsf)
{
DWORD64 disp;
/*
* If we don't have a valid backtrace, then just return.
*/
if (frames == NULL) return FALSE;
/*
* If we don't know what the current function is, then we also have
* nothing to report here.
*/
if (!SymFromAddr(dbg_curr_process->handle, frames[dbg_curr_frame].InstructionOffset,
&disp, symbol))
return FALSE;
if (ihsf) *ihsf = frames[dbg_curr_frame];
return TRUE;
}
void stack_backtrace(DWORD tid, BOOL noisy)
{
STACKFRAME sf;
CONTEXT saved_dbg_context;
struct dbg_thread* thread;
unsigned nf;
if (tid == -1) /* backtrace every thread in every process except the debugger itself, invoking via "bt all" */
{
THREADENTRY32 entry;
HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0);
if (snapshot == INVALID_HANDLE_VALUE)
{
dbg_printf("unable to create toolhelp snapshot\n");
return;
}
entry.dwSize = sizeof(entry);
if (!Thread32First(snapshot, &entry))
{
CloseHandle(snapshot);
return;
}
do
{
if (entry.th32OwnerProcessID == GetCurrentProcessId()) continue;
if (dbg_curr_process) dbg_detach_debuggee();
dbg_printf("\n");
if (!dbg_attach_debuggee(entry.th32OwnerProcessID, FALSE, TRUE))
{
dbg_printf("\nwarning: could not attach to 0x%lx\n", entry.th32OwnerProcessID);
continue;
}
dbg_printf("Backtracing for thread 0x%lx in process 0x%lx (%s):\n", entry.th32ThreadID, dbg_curr_pid, dbg_curr_process->imageName);
stack_backtrace(entry.th32ThreadID, TRUE);
}
while (Thread32Next(snapshot, &entry));
if (dbg_curr_process) dbg_detach_debuggee();
CloseHandle(snapshot);
return;
}
if (!dbg_curr_process)
{
dbg_printf("You must be attached to a process to run this command.\n");
return;
}
saved_dbg_context = dbg_context; /* as we may modify dbg_context... */
if (tid == dbg_curr_tid)
{
thread = dbg_curr_thread;
HeapFree(GetProcessHeap(), 0, frames);
frames = NULL;
}
else
{
thread = dbg_get_thread(dbg_curr_process, tid);
if (!thread)
{
dbg_printf("Unknown thread id (0x%08lx) in current process\n", tid);
return;
}
memset(&dbg_context, 0, sizeof(dbg_context));
dbg_context.ContextFlags = CONTEXT_FULL;
if (SuspendThread(thread->handle) != -1)
{
if (!GetThreadContext(thread->handle, &dbg_context))
{
dbg_printf("Can't get context for thread 0x%lx in current process\n",
tid);
ResumeThread(thread->handle);
return;
}
}
else
{
dbg_printf("Can't suspend thread 0x%lx in current process\n", tid);
return;
}
}
nf = 0;
memset(&sf, 0, sizeof(sf));
memory_get_current_frame(&sf.AddrFrame);
memory_get_current_pc(&sf.AddrPC);
/* don't confuse StackWalk by passing in inconsistent addresses */
if ((sf.AddrPC.Mode == AddrModeFlat) && (sf.AddrFrame.Mode != AddrModeFlat))
{
sf.AddrFrame.Offset = (DWORD)memory_to_linear_addr(&sf.AddrFrame);
sf.AddrFrame.Mode = AddrModeFlat;
}
if (noisy) dbg_printf("Backtrace:\n");
while (StackWalk(IMAGE_FILE_MACHINE_I386, dbg_curr_process->handle,
thread->handle, &sf, &dbg_context, NULL, SymFunctionTableAccess,
SymGetModuleBase, NULL))
{
if (tid == dbg_curr_tid)
{
frames = dbg_heap_realloc(frames,
(nf + 1) * sizeof(IMAGEHLP_STACK_FRAME));
frames[nf].InstructionOffset = (unsigned long)memory_to_linear_addr(&sf.AddrPC);
frames[nf].FrameOffset = (unsigned long)memory_to_linear_addr(&sf.AddrFrame);
}
if (noisy)
{
dbg_printf("%s%d ",
(tid == dbg_curr_tid && nf == dbg_curr_frame ? "=>" : " "),
nf + 1);
print_addr_and_args(&sf.AddrPC, &sf.AddrFrame);
dbg_printf(" (");
print_bare_address(&sf.AddrFrame);
dbg_printf(")\n");
}
nf++;
/* we've probably gotten ourselves into an infinite loop so bail */
if (nf > 200)
break;
}
dbg_context = saved_dbg_context;
if (tid == dbg_curr_tid)
{
nframe = nf;
}
else
{
ResumeThread(thread->handle);
}
}