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Diffstat (limited to 'ACE/ace/Stack_Trace.cpp')
| -rw-r--r-- | ACE/ace/Stack_Trace.cpp | 726 |
1 files changed, 726 insertions, 0 deletions
diff --git a/ACE/ace/Stack_Trace.cpp b/ACE/ace/Stack_Trace.cpp new file mode 100644 index 00000000000..d7ad8a0bd04 --- /dev/null +++ b/ACE/ace/Stack_Trace.cpp @@ -0,0 +1,726 @@ +//============================================================================= +/** + * @file Stack_Trace.cpp + * + * $Id$ + * + * @brief Encapsulate string representation of stack trace. + * + * Some platform-specific areas of this code have been adapted from + * examples found elsewhere. Specifically, + * - the GLIBC stack generation uses the documented "backtrace" API + * and is adapted from examples shown in relevant documentation + * and repeated elsewhere, e.g., + * http://www.linuxselfhelp.com/gnu/glibc/html_chapter/libc_33.html + * - the Solaris stack generation is adapted from a 1995 post on + * comp.unix.solaris by Bart Smaalders, + * http://groups.google.com/group/comp.unix.solaris/browse_thread/thread/8b9f3de8be288f1c/31550f93a48231d5?lnk=gst&q=how+to+get+stack+trace+on+solaris+group:comp.unix.solaris#31550f93a48231d5 + * - VxWorks kernel-mode stack tracing is adapted from a code example + * in the VxWorks FAQ at http://www.xs4all.nl/~borkhuis/vxworks/vxw_pt5.html + * although the undocumented functions it uses are also mentioned in + * various documents available on the WindRiver support website. + * + * If you add support for a new platform, please add a bullet to the + * above list with durable references to the origins of your code. + * + */ +//============================================================================= + +#include "ace/Stack_Trace.h" +#include "ace/Min_Max.h" +#include "ace/OS_NS_string.h" +#include "ace/OS_NS_stdio.h" + +/* + This is ugly, simply because it's very platform-specific. +*/ + +const char ACE_Stack_Trace::UNSUPPORTED[] = "<stack traces unsupported platform>"; +const char ACE_Stack_Trace::UNABLE_TO_GET_TRACE[] = "<unable to get trace>"; + +ACE_Stack_Trace::ACE_Stack_Trace (ssize_t starting_frame_offset, size_t num_frames) + : buflen_(0) +{ + // cannot initialize arrays, so we must assign. + this->buf_[0] = '\0'; + this->generate_trace (starting_frame_offset, num_frames); +} + +const char* +ACE_Stack_Trace::c_str () const +{ + return &this->buf_[0]; +} + +static inline size_t +determine_starting_frame (ssize_t initial_frame, ssize_t offset) +{ + return ACE_MAX( initial_frame + offset, static_cast<ssize_t>(0)); +} + +#if (defined(__GLIBC__) || defined(ACE_HAS_EXECINFO_H)) && (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)) +// This is the code for glibc +# include <execinfo.h> + +void +ACE_Stack_Trace::generate_trace (ssize_t starting_frame_offset, size_t num_frames) +{ + const size_t MAX_FRAMES = 128; + const ssize_t INITIAL_FRAME = 3; + + void* stack[MAX_FRAMES]; + size_t stack_size = 0; + char** stack_syms; + + if (num_frames == 0) + num_frames = MAX_FRAMES; + + size_t starting_frame = + determine_starting_frame (INITIAL_FRAME, starting_frame_offset); + + stack_size = ::backtrace (&stack[0], sizeof(stack)/sizeof(stack[0])); + if (stack_size != 0) + { + stack_syms = ::backtrace_symbols (stack, stack_size); + + for (size_t i = starting_frame; + i < stack_size && num_frames > 0; + i++, num_frames--) + { + // this could be more efficient by remembering where we left off in buf_ + char *symp = &stack_syms[i][0]; + while (this->buflen_ < SYMBUFSIZ - 2 && *symp != '\0') + { + this->buf_[this->buflen_++] = *symp++; + } + this->buf_[this->buflen_++] = '\n'; // put a newline at the end + } + this->buf_[this->buflen_] = '\0'; // zero terminate the string + + ::free (stack_syms); + } + else + { + ACE_OS::strcpy (&this->buf_[0], UNABLE_TO_GET_TRACE); + } +} +#elif defined(VXWORKS) && !defined(__RTP__) +# include <trcLib.h> +# include <taskLib.h> // hopefully this is enough to get all the necessary #defines. + +struct ACE_Stack_Trace_stackstate +{ + ACE_Stack_Trace_stackstate (char* b, size_t& bl, size_t nf, size_t sf) + : buf(b), buflen(bl), num_frames(nf), starting_frame(sf) + { } + + char* buf; + size_t& buflen; + size_t num_frames; + size_t starting_frame; +}; + +//@TODO: Replace with a TSS-based pointer to avoid problems in multithreaded environs, +// or use a mutex to serialize access to this. +static ACE_Stack_Trace_stackstate* ACE_Stack_Trace_stateptr = 0; + +static void +ACE_Stack_Trace_Add_Frame_To_Buf (INSTR *caller, + unsigned int func, + unsigned int nargs, + unsigned int *args) +{ + if (ACE_Stack_Trace_stateptr == 0) + return; + + ACE_Stack_Trace_stackstate *stackstate = ACE_Stack_Trace_stateptr; + + // Decrement the num_frames and starting_frame elements, + // then see if we're ready to start or ready to finish. + --stackstate->num_frames; + --stackstate->starting_frame; + + if (stackstate->num_frames == 0 || stackstate->starting_frame > 0) + return; + + // These are references so that the structure gets updated + // in the code below. + char*& buf = stackstate->buf; + unsigned int& len = stackstate->buflen; + + // At some point try using symFindByValue() to lookup func (and caller?) + // to print out symbols rather than simply addresses. + + // VxWorks can pass -1 for "nargs" if there was an error + if (nargs == static_cast<unsigned int> (-1)) nargs = 0; + + len += ACE_OS::sprintf (&buf[len], "%#10x: %#10x (", (int)caller, func); + for (unsigned int i = 0; i < nargs; ++i) + { + if (i != 0) + len += ACE_OS::sprintf (&buf[len], ", "); + len += ACE_OS::sprintf(&buf [len], "%#x", args [i]); + } + + len += ACE_OS::sprintf(&buf[len], ")\n"); +} + +void +ACE_Stack_Trace::generate_trace (ssize_t starting_frame_offset, + size_t num_frames) +{ + const size_t MAX_FRAMES = 128; + const ssize_t INITIAL_FRAME = 3; + + if (num_frames == 0) + num_frames = MAX_FRAMES; + + size_t starting_frame = + determine_starting_frame (INITIAL_FRAME, starting_frame_offset); + + ACE_Stack_Trace_stackstate state (&this->buf_[0], this->buflen_, + num_frames, starting_frame); + + REG_SET regs; + + taskRegsGet ((int)taskIdSelf(), ®s); + // Maybe we should take a lock here to guard stateptr? + ACE_Stack_Trace_stateptr = &state; + trcStack (®s, (FUNCPTR)ACE_Stack_Trace_Add_Frame_To_Buf, taskIdSelf ()); +} + + +#elif defined(VXWORKS) && defined(__RTP__) +# include <setjmp.h> +# include <taskLib.h> +# include <private/trcLibP.h> + +// See memEdrLib.c in VxWorks RTP sources for an example of stack tracing. + +static STATUS ace_vx_rtp_pc_validate (INSTR *pc, TRC_OS_CTX *) +{ + return ALIGNED (pc, sizeof (INSTR)) ? OK : ERROR; +} + +void +ACE_Stack_Trace::generate_trace (ssize_t starting_frame_offset, + size_t num_frames) +{ + const size_t MAX_FRAMES = 128; + const ssize_t INITIAL_FRAME = 2; + + if (num_frames == 0) num_frames = MAX_FRAMES; + size_t starting_frame = + determine_starting_frame (INITIAL_FRAME, starting_frame_offset); + + jmp_buf regs; + setjmp (regs); + + TASK_DESC desc; + if (taskInfoGet (taskIdSelf (), &desc) == ERROR) return; + + TRC_OS_CTX osCtx; + osCtx.stackBase = desc.td_pStackBase; + osCtx.stackEnd = desc.td_pStackEnd; +#if (ACE_VXWORKS < 0x690) + osCtx.pcValidateRtn = reinterpret_cast<FUNCPTR> (ace_vx_rtp_pc_validate); +#else + // reinterpret_cast causes an error + osCtx.pcValidateRtn = ace_vx_rtp_pc_validate; +#endif + + char *fp = _WRS_FRAMEP_FROM_JMP_BUF (regs); + INSTR *pc = _WRS_RET_PC_FROM_JMP_BUF (regs); + + for (size_t depth = 0; depth < num_frames + starting_frame; ++depth) + { + char *prevFp; + INSTR *prevPc; + INSTR *prevFn; + + if (trcLibFuncs.lvlInfoGet (fp, pc, &osCtx, &prevFp, &prevPc, &prevFn) + == ERROR) + { + ACE_OS::strcpy (this->buf_, UNABLE_TO_GET_TRACE); + return; + } + + if(prevPc == 0 || prevFp == 0) break; + + if (depth >= starting_frame) + { + //Hopefully a future version of VxWorks will have a system call + //for an RTP to query its own symbols, but this is not possible now. + //An enhancement request has been filed under WIND00123307. + const char *fnName = "(no symbols)"; + + static const int N_ARGS = 12; + int buf[N_ARGS]; + int *pArgs = 0; + int numArgs = + trcLibFuncs.lvlArgsGet (prevPc, prevFn, prevFp, + buf, N_ARGS, &pArgs); + + // VxWorks can return -1 for "numArgs" if there was an error + if (numArgs == -1) numArgs = 0; + + size_t len = ACE_OS::strlen (this->buf_); + size_t space = SYMBUFSIZ - len - 1; + char *cursor = this->buf_ + len; + size_t written = ACE_OS::snprintf (cursor, space, "%p %s", + prevFn, fnName); + cursor += written; + space -= written; + + if (space < 1) return; //no point in logging when we're out of buffer + for (int arg = 0; numArgs != -1 && pArgs && arg < numArgs; ++arg) + { + if (arg == 0) *cursor++ = '(', --space; + written = ACE_OS::snprintf (cursor, space, + (arg < numArgs - 1) ? "%x, " : "%x", + pArgs[arg]); + cursor += written; + space -= written; + if (space && arg == numArgs - 1) *cursor++ = ')', --space; + } + if (space) *cursor++ = '\n', --space; + *cursor++ = 0; //we saved space for the null terminator + } + + fp = prevFp; + pc = prevPc; + } +} + +#elif defined(sun) +/* + * walks up call stack, printing library:routine+offset for each routine + */ + +# include <dlfcn.h> +# include <setjmp.h> +# include <sys/types.h> +# include <sys/reg.h> +# include <sys/frame.h> +# define ACE_STACK_TRACE_BIAS 0 + +# if defined(sparc) || defined(__sparc) +# define ACE_STACK_TRACE_FLUSHWIN() asm("ta 3"); +# define ACE_STACK_TRACE_FRAME_PTR_INDEX 1 +# define ACE_STACK_TRACE_SKIP_FRAMES 0 +# if defined(__sparcv9) +# undef ACE_STACK_TRACE_BIAS +# define ACE_STACK_TRACE_BIAS 2047 +# endif +# endif + +# if defined(i386) || defined(__i386) +# define ACE_STACK_TRACE_FLUSHWIN() +# define ACE_STACK_TRACE_FRAME_PTR_INDEX 3 +# define ACE_STACK_TRACE_SKIP_FRAMES 0 +# endif + +# if defined(__amd64) || defined(__x86_64) +# define ACE_STACK_TRACE_FLUSHWIN() +# define ACE_STACK_TRACE_FRAME_PTR_INDEX 5 +# define ACE_STACK_TRACE_SKIP_FRAMES 0 +# endif + +# if defined(ppc) || defined(__ppc) +# define ACE_STACK_TRACE_FLUSHWIN() +# define ACE_STACK_TRACE_FRAME_PTR_INDEX 0 +# define ACE_STACK_TRACE_SKIP_FRAMES 2 +# endif + +static frame* +cs_frame_adjust(frame* sp) +{ + unsigned char* sp_byte = (unsigned char*)sp; + sp_byte += ACE_STACK_TRACE_BIAS; + return (frame*) sp_byte; +} + +/* + this function walks up call stack, calling user-supplied + function once for each stack frame, passing the pc and the user-supplied + usrarg as the argument. + */ + +static int +cs_operate(int (*func)(void *, void *), void * usrarg, + size_t starting_frame, size_t num_frames_arg) +{ + ACE_STACK_TRACE_FLUSHWIN(); + + jmp_buf env; + setjmp(env); + frame* sp = cs_frame_adjust((frame*) env[ACE_STACK_TRACE_FRAME_PTR_INDEX]); + + // make a copy of num_frames_arg to eliminate the following warning on some + // solaris platforms: + // Stack_Trace.cpp:318: warning: argument `size_t num_frames' might be clobbered by `longjmp' or `vfork' + size_t num_frames = num_frames_arg; + + // I would like to use ACE_MAX below rather than ?:, but + // I get linker relocation errors such as the following when + // I use it: + // ld: fatal: relocation error: file: .shobj/Stack_Trace.o section: + // .rela.debug_line symbol: : relocation against a discarded symbol, + // symbol is part of discarded section: + // .text%const __type_0&ace_max<unsig\ned>(const __type_0&,const __type_0&) + // + const size_t starting_skip = starting_frame - 1; +#if ACE_STACK_TRACE_SKIP_FRAMES == 0 + size_t skip_frames = starting_skip; +#else + size_t skip_frames = + ACE_STACK_TRACE_SKIP_FRAMES > starting_skip ? + ACE_STACK_TRACE_SKIP_FRAMES : starting_skip; +#endif /* ACE_STACK_TRACE_SKIP_FRAMES == 0 */ + size_t i; + for (i = 0; i < skip_frames && sp; ++i) + { + sp = cs_frame_adjust((frame*) sp->fr_savfp); + } + + i = 0; + + while ( sp + && sp->fr_savpc + && ++i + && --num_frames + && (*func)((void*)sp->fr_savpc, usrarg)) + { + sp = cs_frame_adjust((frame*) sp->fr_savfp); + } + + return(i); +} + +static int +add_frame_to_buf (void* pc, void* usrarg) +{ + char* buf = (char*)usrarg; + Dl_info info; + const char* func = "??"; + const char* lib = "??"; + + if(dladdr(pc, & info) != 0) + { + lib = (const char *) info.dli_fname; + func = (const char *) info.dli_sname; + } + + (void) ACE_OS::snprintf(buf, + ACE_Stack_Trace::SYMBUFSIZ, + "%s%s:%s+0x%x\n", + buf, + lib, + func, + //@@ Should the arithmetic on the following + //line be done with two void* ptrs? The result + //would be ptrdiff_t, and what is the correct + //sprintf() conversion character for that? + (size_t)pc - (size_t)info.dli_saddr); + + return(1); +} + +void +ACE_Stack_Trace::generate_trace (ssize_t starting_frame_offset, + size_t num_frames) +{ + const size_t MAX_FRAMES = 128; + const ssize_t INITIAL_FRAME = 3; + + if (num_frames == 0) + num_frames = MAX_FRAMES; + + size_t starting_frame = + determine_starting_frame (INITIAL_FRAME, starting_frame_offset); + + cs_operate (&add_frame_to_buf, &this->buf_[0], starting_frame, num_frames); +} + +#elif defined(ACE_WIN64) && (_WIN32_WINNT <= _WIN32_WINNT_WIN2K) +# if defined(_MSC_VER) +# define STRING2(X) #X +# define STRING(X) STRING2(X) +# pragma message (__FILE__ "(" STRING(__LINE__) ") : warning: stack traces"\ + " can't be generated on 64-bit Windows when _WIN32_WINNT is less than "\ + "0x501.") +# undef STRING +# undef STRING2 +# endif /*_MSC_VER*/ +void +ACE_Stack_Trace::generate_trace (ssize_t, size_t) +{ + ACE_OS::strcpy (&this->buf_[0], "<stack traces unsupported on Win64 unless " + "ACE is built with _WIN32_WINNT set to 0x501 or above>"); +} + +#elif defined(ACE_WIN32) && !defined(ACE_HAS_WINCE) && !defined (__MINGW32__) \ + && !defined(__BORLANDC__) +# include <windows.h> +# include <Dbghelp.h> + +# define MAXTEXT 5000 +# define SYMSIZE 100 + +//@TODO: Test with WCHAR +//@TODO: Need a common CriticalSection since dbghelp is not thread-safe + +typedef struct _dbghelp_functions +{ + HMODULE hMod; //our handle to dbghelp.dll + + //these already have typedefs in DbgHelp.h + DWORD64 (WINAPI *SymGetModuleBase64) (HANDLE hProc, DWORD64 dwAddr); + PVOID (WINAPI *SymFunctionTableAccess64) (HANDLE hProc, DWORD64 AddrBase); + + typedef BOOL (WINAPI *SymFromAddr_t) + (HANDLE hProc, DWORD64 Addr, PDWORD64 Disp, PSYMBOL_INFO Symbol); + SymFromAddr_t SymFromAddr; + + typedef BOOL (WINAPI *SymGetLineFromAddr64_t) (HANDLE hProc, DWORD64 dwAddr, + PDWORD pdwDisplacement, + PIMAGEHLP_LINE64 Line); + SymGetLineFromAddr64_t SymGetLineFromAddr64; + + typedef DWORD (WINAPI *SymSetOptions_t) (DWORD SymOptions); + SymSetOptions_t SymSetOptions; + + typedef DWORD (WINAPI *SymGetOptions_t) (); + SymGetOptions_t SymGetOptions; + + typedef BOOL (WINAPI *SymInitialize_t) (HANDLE hProc, PCTSTR UserSearchPath, + BOOL invasive); + SymInitialize_t SymInitialize; + + typedef BOOL + (WINAPI *StackWalk64_t) (DWORD MachineType, HANDLE hPRoc, HANDLE hThr, + LPSTACKFRAME64 StackFrame, PVOID ContextRecord, + PREAD_PROCESS_MEMORY_ROUTINE64 RMRoutine, + PFUNCTION_TABLE_ACCESS_ROUTINE64 FTARoutine, + PGET_MODULE_BASE_ROUTINE64 GMBRoutine, + PTRANSLATE_ADDRESS_ROUTINE64 TranslateAddress); + StackWalk64_t StackWalk64; + + typedef BOOL (WINAPI *SymCleanup_t) (HANDLE hProc); + SymCleanup_t SymCleanup; +} dbghelp_functions; + + +# pragma warning (push) +# pragma warning (disable:4706) +static bool load_dbghelp_library_if_needed (dbghelp_functions *pDbg) +{ + //@TODO: See codeproject's StackWalker.cpp for the list of locations to + //search so we get the "enhanced" dbghelp if the user has it but it is not + //first on the path. + if (!(pDbg->hMod = ACE_TEXT_LoadLibrary (ACE_TEXT ("Dbghelp")))) + return false; + + //@TODO: Cache this so we don't have to re-link every time. When to unload? + +# define LINK(TYPE, NAME) (pDbg->NAME = \ + (TYPE) GetProcAddress (pDbg->hMod, #NAME)) +# define LINK_T(NAME) LINK (dbghelp_functions::NAME##_t, NAME) + return LINK (PGET_MODULE_BASE_ROUTINE64, SymGetModuleBase64) + && LINK (PFUNCTION_TABLE_ACCESS_ROUTINE64, SymFunctionTableAccess64) + && LINK_T (SymFromAddr) && LINK_T (SymGetLineFromAddr64) + && LINK_T (SymSetOptions)&& LINK_T (SymGetOptions) + && LINK_T (SymInitialize) && LINK_T (StackWalk64) && LINK_T (SymCleanup); +# undef LINK +# undef LINK_T +} +# pragma warning (pop) + + +struct frame_state { + STACKFRAME64 sf; + PSYMBOL_INFO pSym; + dbghelp_functions *pDbg; +}; + +static int +add_frame_to_buf (struct frame_state const *fs, void *usrarg) +{ + if (fs == 0 || usrarg == 0) + return -1; + + char *buf = static_cast<char *> (usrarg); + + DWORD64 disp; + DWORD64 dwModBase = fs->pDbg->SymGetModuleBase64 (GetCurrentProcess (), + fs->sf.AddrPC.Offset); + if (fs->pDbg->SymFromAddr (GetCurrentProcess (), + fs->sf.AddrPC.Offset, &disp, fs->pSym)) + { + IMAGEHLP_LINE64 line = {sizeof (IMAGEHLP_LINE64)}; + DWORD lineDisp; + if (fs->pDbg->SymGetLineFromAddr64 (GetCurrentProcess (), + fs->sf.AddrPC.Offset, + &lineDisp, &line)) + { + (void) ACE_OS::snprintf (buf, ACE_Stack_Trace::SYMBUFSIZ, + "%s%s() %s: %d + 0x%x\n", + buf, fs->pSym->Name, line.FileName, + line.LineNumber, lineDisp); + } + else + { + (void) ACE_OS::snprintf (buf, ACE_Stack_Trace::SYMBUFSIZ, + "%s%s()+0x%x [0x%x]\n", + buf, fs->pSym->Name, disp, + fs->sf.AddrPC.Offset - dwModBase); + } + } + else + { + (void) ACE_OS::snprintf (buf, ACE_Stack_Trace::SYMBUFSIZ, + "%s[0x%x]\n", + buf, fs->sf.AddrPC.Offset - dwModBase); + } + return 0; +} + +static void emptyStack () { } + +#if defined (_MSC_VER) +# pragma warning(push) +// Suppress warning 4748 "/GS can not protect parameters and local +// variables from local buffer overrun because optimizations are +// disabled in function" +# pragma warning(disable: 4748) +#endif /* _MSC_VER */ + +static int +cs_operate(int (*func)(struct frame_state const *, void *), void *usrarg, + size_t starting_frame, size_t num_frames) +{ + dbghelp_functions dbg; + if (!load_dbghelp_library_if_needed (&dbg)) + { + ACE_OS::strcpy (static_cast<char *> (usrarg), + "<error loading dbghelp.dll>"); + if (dbg.hMod) FreeLibrary (dbg.hMod); + return 1; + } + + frame_state fs; + ZeroMemory (&fs.sf, sizeof (fs.sf)); + fs.pDbg = &dbg; + emptyStack (); //Not sure what this should do, Chad? + + CONTEXT c; + ZeroMemory (&c, sizeof (CONTEXT)); + c.ContextFlags = CONTEXT_FULL; + +# if defined (_M_IX86) + DWORD machine = IMAGE_FILE_MACHINE_I386; + __asm { + call x + x: pop eax + mov c.Eip, eax + mov c.Ebp, ebp + mov c.Esp, esp + } + fs.sf.AddrPC.Offset = c.Eip; + fs.sf.AddrStack.Offset = c.Esp; + fs.sf.AddrFrame.Offset = c.Ebp; + fs.sf.AddrPC.Mode = AddrModeFlat; + fs.sf.AddrStack.Mode = AddrModeFlat; + fs.sf.AddrFrame.Mode = AddrModeFlat; +# elif defined (_M_X64) + DWORD machine = IMAGE_FILE_MACHINE_AMD64; + RtlCaptureContext (&c); + fs.sf.AddrPC.Offset = c.Rip; + fs.sf.AddrFrame.Offset = c.Rsp; //should be Rbp or Rdi instead? + fs.sf.AddrStack.Offset = c.Rsp; + fs.sf.AddrPC.Mode = AddrModeFlat; + fs.sf.AddrFrame.Mode = AddrModeFlat; + fs.sf.AddrStack.Mode = AddrModeFlat; +# elif defined (_M_IA64) + DWORD machine = IMAGE_FILE_MACHINE_IA64; + RtlCaptureContext (&c); + fs.sf.AddrPC.Offset = c.StIIP; + fs.sf.AddrFrame.Offset = c.RsBSP; + fs.sf.AddrBStore.Offset = c.RsBSP; + fs.sf.AddrStack.Offset = c.IntSp; + fs.sf.AddrPC.Mode = AddrModeFlat; + fs.sf.AddrFrame.Mode = AddrModeFlat; + fs.sf.AddrBStore.Mode = AddrModeFlat; + fs.sf.AddrStack.Mode = AddrModeFlat; +# endif + + fs.pSym = (PSYMBOL_INFO) GlobalAlloc (GMEM_FIXED, + sizeof (SYMBOL_INFO) + + sizeof (ACE_TCHAR) * (SYMSIZE - 1)); + fs.pSym->SizeOfStruct = sizeof (SYMBOL_INFO); + fs.pSym->MaxNameLen = SYMSIZE * sizeof (ACE_TCHAR); + dbg.SymSetOptions (SYMOPT_DEFERRED_LOADS | SYMOPT_LOAD_LINES + | SYMOPT_FAIL_CRITICAL_ERRORS | dbg.SymGetOptions ()); + dbg.SymInitialize (GetCurrentProcess (), 0, true); + //What does the "true" parameter mean when tracing the current process? + + for (size_t current_frame = 0; current_frame < num_frames + starting_frame; + ++current_frame) + { + BOOL ok = dbg.StackWalk64 (machine, + GetCurrentProcess (), + GetCurrentThread (), + &fs.sf, &c, 0, + dbg.SymFunctionTableAccess64, + dbg.SymGetModuleBase64, 0); + if (!ok || fs.sf.AddrFrame.Offset == 0) + break; + + if (current_frame < starting_frame) + continue; + + func (&fs, usrarg); + } + + dbg.SymCleanup (GetCurrentProcess ()); + GlobalFree (fs.pSym); + FreeLibrary (dbg.hMod); + + return 0; +} + +#if defined (_MSC_VER) +// Restore the warning state to what it was before entry. +# pragma warning(pop) +#endif /* _MSC_VER */ + +void +ACE_Stack_Trace::generate_trace (ssize_t starting_frame_offset, + size_t num_frames) +{ + const size_t MAX_FRAMES = 128; + const ssize_t INITIAL_FRAME = 3; + + if (num_frames == 0) + num_frames = MAX_FRAMES; + + size_t starting_frame = + determine_starting_frame (INITIAL_FRAME, starting_frame_offset); + + cs_operate (&add_frame_to_buf, &this->buf_[0], starting_frame, num_frames); +} + +#else // Unsupported platform +void +ACE_Stack_Trace::generate_trace (ssize_t, size_t) +{ +// Call determine_starting_frame() on HP aCC build to resolve declared +// method never referenced warning. +#if defined (__HP_aCC) + size_t starting_frame = determine_starting_frame (0, 0); +#endif + + ACE_OS::strcpy (&this->buf_[0], UNSUPPORTED); +} +#endif + |