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@ -25,6 +25,9 @@
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#ifdef WITH_UCONTEXT
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#ifdef WITH_UCONTEXT
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#include <sys/ucontext.h>
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#include <sys/ucontext.h>
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#endif
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#endif
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#if defined(WITH_SIGALTSTACK) && defined(WITH_UCONTEXT)
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#include <pthread.h>
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#endif
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#include "../../safeguards.h"
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#include "../../safeguards.h"
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@ -174,22 +177,9 @@ class CrashLogOSX : public CrashLog {
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buffer += seprintf(buffer, last, "\nStacktrace:\n");
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buffer += seprintf(buffer, last, "\nStacktrace:\n");
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void **frame;
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void **frame;
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#if defined(__ppc__) || defined(__ppc64__)
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int i = 0;
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/* Apple says __builtin_frame_address can be broken on PPC. */
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__asm__ volatile("mr %0, r1" : "=r" (frame));
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#else
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frame = (void **)__builtin_frame_address(0);
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#endif
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for (int i = 0; frame != NULL && i < MAX_STACK_FRAMES; i++) {
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/* Get IP for current stack frame. */
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#if defined(__ppc__) || defined(__ppc64__)
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void *ip = frame[2];
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#else
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void *ip = frame[1];
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#endif
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if (ip == NULL) break;
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auto print_frame = [&](void *ip) {
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/* Print running index. */
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/* Print running index. */
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buffer += seprintf(buffer, last, " [%02d]", i);
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buffer += seprintf(buffer, last, " [%02d]", i);
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@ -221,6 +211,49 @@ class CrashLogOSX : public CrashLog {
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free(func_name);
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free(func_name);
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}
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}
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buffer += seprintf(buffer, last, "\n");
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buffer += seprintf(buffer, last, "\n");
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};
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#if defined(__ppc__) || defined(__ppc64__)
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/* Apple says __builtin_frame_address can be broken on PPC. */
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__asm__ volatile("mr %0, r1" : "=r" (frame));
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#elif defined(WITH_SIGALTSTACK) && defined(WITH_UCONTEXT) && (defined(__x86_64__) || defined(__i386))
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if (this->signal_instruction_ptr_valid) {
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print_frame(this->signal_instruction_ptr);
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i++;
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}
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pthread_t self = pthread_self();
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char *stacktop = (char *) pthread_get_stackaddr_np(self);
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char *stackbot = stacktop - pthread_get_stacksize_np(self);
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stacktop -= 2 * sizeof(void *);
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ucontext_t *ucontext = static_cast<ucontext_t *>(context);
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#if defined(__x86_64__)
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void **bp = (void **) ucontext->uc_mcontext->__ss.__rbp;
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void **sp = (void **) ucontext->uc_mcontext->__ss.__rsp;
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#else
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void **bp = (void **) ucontext->uc_mcontext->__ss.__ebp;
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void **sp = (void **) ucontext->uc_mcontext->__ss.__esp;
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#endif
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if (IS_ALIGNED(bp) && reinterpret_cast<uintptr_t>(bp) >= reinterpret_cast<uintptr_t>(sp) && reinterpret_cast<uintptr_t>(bp) >= reinterpret_cast<uintptr_t>(stackbot) && reinterpret_cast<uintptr_t>(bp) <= reinterpret_cast<uintptr_t>(stacktop)) {
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frame = bp;
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} else {
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frame = nullptr;
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}
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#else
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frame = (void **)__builtin_frame_address(0);
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#endif
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for (; frame != nullptr && i < MAX_STACK_FRAMES; i++) {
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/* Get IP for current stack frame. */
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#if defined(__ppc__) || defined(__ppc64__)
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void *ip = frame[2];
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#else
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void *ip = frame[1];
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#endif
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if (ip == nullptr) break;
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print_frame(ip);
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/* Get address of next stack frame. */
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/* Get address of next stack frame. */
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void **next = (void **)frame[0];
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void **next = (void **)frame[0];
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@ -263,7 +296,7 @@ class CrashLogOSX : public CrashLog {
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args.push_back("--batch");
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args.push_back("--batch");
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args.push_back("-o");
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args.push_back("-o");
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args.push_back(IsNonMainThread() ? "bt all" : "bt");
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args.push_back(IsNonMainThread() ? "bt all" : "bt 100");
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if (this->GetMessage() == nullptr && this->signal_instruction_ptr_valid) {
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if (this->GetMessage() == nullptr && this->signal_instruction_ptr_valid) {
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seprintf(disasm_buffer, lastof(disasm_buffer), "disassemble -b -F intel -c 1 -s %p", this->signal_instruction_ptr);
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seprintf(disasm_buffer, lastof(disasm_buffer), "disassemble -b -F intel -c 1 -s %p", this->signal_instruction_ptr);
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@ -448,10 +481,21 @@ void CDECL HandleCrash(int signum, siginfo_t *si, void *context)
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/* static */ void CrashLog::InitialiseCrashLog()
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/* static */ void CrashLog::InitialiseCrashLog()
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{
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{
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#if defined(WITH_SIGALTSTACK) && defined(WITH_UCONTEXT)
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const size_t stack_size = max<size_t>(SIGSTKSZ, 512*1024);
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stack_t ss;
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ss.ss_sp = CallocT<byte>(stack_size);
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ss.ss_size = stack_size;
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ss.ss_flags = 0;
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sigaltstack(&ss, nullptr);
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#endif
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for (const int *i = _signals_to_handle; i != endof(_signals_to_handle); i++) {
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for (const int *i = _signals_to_handle; i != endof(_signals_to_handle); i++) {
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struct sigaction sa;
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struct sigaction sa;
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memset(&sa, 0, sizeof(sa));
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memset(&sa, 0, sizeof(sa));
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sa.sa_flags = SA_SIGINFO | SA_RESTART;
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sa.sa_flags = SA_SIGINFO | SA_RESTART;
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#if defined(WITH_SIGALTSTACK) && defined(WITH_UCONTEXT)
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sa.sa_flags |= SA_ONSTACK;
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#endif
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sigemptyset(&sa.sa_mask);
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sigemptyset(&sa.sa_mask);
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sa.sa_sigaction = HandleCrash;
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sa.sa_sigaction = HandleCrash;
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sigaction(*i, &sa, nullptr);
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sigaction(*i, &sa, nullptr);
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