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236 lines
7 KiB
C
236 lines
7 KiB
C
/*
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* Debugger stack handling
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*
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* Copyright 1995 Alexandre Julliard
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* Copyright 1996 Eric Youngdale
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* Copyright 1999 Ove Kåven
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include <stdlib.h>
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#include "debugger.h"
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#include "stackframe.h"
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#include "winbase.h"
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#include "wine/debug.h"
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#include "tlhelp32.h"
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WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
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static int nframe;
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static IMAGEHLP_STACK_FRAME* frames = NULL;
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/***********************************************************************
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* stack_info
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*
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* Dump the top of the stack
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*/
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void stack_info(void)
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{
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ADDRESS addr;
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/* FIXME: we assume stack grows the same way as on i386 */
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if (!memory_get_current_stack(&addr))
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dbg_printf("Bad segment (%d)\n", addr.Segment);
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dbg_printf("Stack dump:\n");
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switch (addr.Mode)
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{
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case AddrModeFlat: /* 32-bit mode */
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case AddrMode1632: /* 32-bit mode */
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memory_examine(memory_to_linear_addr(&addr), 24, 'x');
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break;
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case AddrModeReal: /* 16-bit mode */
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case AddrMode1616:
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memory_examine(memory_to_linear_addr(&addr), 24, 'w');
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break;
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}
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}
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int stack_set_frame(int newframe)
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{
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ADDRESS addr;
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dbg_curr_frame = newframe;
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if (dbg_curr_frame >= nframe) dbg_curr_frame = nframe - 1;
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if (dbg_curr_frame < 0) dbg_curr_frame = 0;
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addr.Mode = AddrModeFlat;
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addr.Offset = frames[dbg_curr_frame].InstructionOffset;
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source_list_from_addr(&addr, 0);
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return TRUE;
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}
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int stack_get_frame(SYMBOL_INFO* symbol, IMAGEHLP_STACK_FRAME* ihsf)
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{
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/*
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* If we don't have a valid backtrace, then just return.
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*/
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if (frames == NULL) return FALSE;
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/*
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* If we don't know what the current function is, then we also have
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* nothing to report here.
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*/
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SymFromAddr(dbg_curr_process->handle, frames[dbg_curr_frame].InstructionOffset,
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NULL, symbol);
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if (ihsf) *ihsf = frames[dbg_curr_frame];
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return TRUE;
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}
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void stack_backtrace(DWORD tid, BOOL noisy)
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{
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STACKFRAME sf;
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CONTEXT saved_dbg_context;
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struct dbg_thread* thread;
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unsigned nf;
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if (tid == -1) /* backtrace every thread in every process except the debugger itself, invoking via "bt all" */
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{
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THREADENTRY32 entry;
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HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0);
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if (snapshot == INVALID_HANDLE_VALUE)
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{
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dbg_printf("unable to create toolhelp snapshot\n");
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return;
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}
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entry.dwSize = sizeof(entry);
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if (!Thread32First(snapshot, &entry))
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{
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CloseHandle(snapshot);
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return;
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}
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do
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{
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if (entry.th32OwnerProcessID == GetCurrentProcessId()) continue;
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if (dbg_curr_process) dbg_detach_debuggee();
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dbg_printf("\n");
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if (!dbg_attach_debuggee(entry.th32OwnerProcessID, FALSE, TRUE))
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{
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dbg_printf("\nwarning: could not attach to 0x%lx\n", entry.th32OwnerProcessID);
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continue;
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}
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dbg_printf("Backtracing for thread 0x%lx in process 0x%lx (%s):\n", entry.th32ThreadID, dbg_curr_pid, dbg_curr_process->imageName);
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stack_backtrace(entry.th32ThreadID, TRUE);
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}
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while (Thread32Next(snapshot, &entry));
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if (dbg_curr_process) dbg_detach_debuggee();
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CloseHandle(snapshot);
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return;
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}
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if (!dbg_curr_process)
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{
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dbg_printf("You must be attached to a process to run this command.\n");
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return;
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}
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saved_dbg_context = dbg_context; /* as we may modify dbg_context... */
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if (tid == dbg_curr_tid)
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{
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thread = dbg_curr_thread;
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if (frames) HeapFree(GetProcessHeap(), 0, frames);
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frames = NULL;
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}
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else
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{
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thread = dbg_get_thread(dbg_curr_process, tid);
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if (!thread)
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{
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dbg_printf("Unknown thread id (0x%08lx) in current process\n", tid);
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return;
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}
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memset(&dbg_context, 0, sizeof(dbg_context));
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dbg_context.ContextFlags = CONTEXT_FULL;
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if (SuspendThread(thread->handle) != -1)
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{
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if (!GetThreadContext(thread->handle, &dbg_context))
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{
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dbg_printf("Can't get context for thread 0x%lx in current process\n",
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tid);
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ResumeThread(thread->handle);
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return;
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}
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}
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else
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{
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dbg_printf("Can't suspend thread 0x%lx in current process\n", tid);
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return;
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}
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}
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nf = 0;
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memset(&sf, 0, sizeof(sf));
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memory_get_current_frame(&sf.AddrFrame);
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memory_get_current_pc(&sf.AddrPC);
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/* don't confuse StackWalk by passing in inconsistent addresses */
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if ((sf.AddrPC.Mode == AddrModeFlat) && (sf.AddrFrame.Mode != AddrModeFlat))
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{
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sf.AddrFrame.Offset = (DWORD)memory_to_linear_addr(&sf.AddrFrame);
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sf.AddrFrame.Mode = AddrModeFlat;
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}
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if (noisy) dbg_printf("Backtrace:\n");
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while (StackWalk(IMAGE_FILE_MACHINE_I386, dbg_curr_process->handle,
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thread->handle, &sf, &dbg_context, NULL, SymFunctionTableAccess,
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SymGetModuleBase, NULL))
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{
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if (tid == dbg_curr_tid)
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{
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frames = dbg_heap_realloc(frames,
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(nf + 1) * sizeof(IMAGEHLP_STACK_FRAME));
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frames[nf].InstructionOffset = (unsigned long)memory_to_linear_addr(&sf.AddrPC);
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frames[nf].FrameOffset = (unsigned long)memory_to_linear_addr(&sf.AddrFrame);
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}
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if (noisy)
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{
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dbg_printf("%s%d ",
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(tid == dbg_curr_tid && nf == dbg_curr_frame ? "=>" : " "),
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nf + 1);
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print_addr_and_args(&sf.AddrPC, &sf.AddrFrame);
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dbg_printf(" (");
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print_bare_address(&sf.AddrFrame);
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dbg_printf(")\n");
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}
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nf++;
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/* we've probably gotten ourselves into an infinite loop so bail */
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if (nf > 200)
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break;
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}
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dbg_context = saved_dbg_context;
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if (tid == dbg_curr_tid)
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{
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nframe = nf;
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}
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else
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{
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ResumeThread(thread->handle);
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}
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}
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