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1.1 root 1: /*
2: Copyright (c) 2008 TrueCrypt Foundation. All rights reserved.
3:
4: Governed by the TrueCrypt License 2.4 the full text of which is contained
5: in the file License.txt included in TrueCrypt binary and source code
6: distribution packages.
7: */
8:
9: #include "System.h"
10: #include <wx/stackwalk.h>
11:
12: #include "Main.h"
13: #include "UserInterface.h"
14: #include "GraphicUserInterface.h"
15:
16: #ifdef TC_UNIX
17: #include <signal.h>
18: #endif
19:
20: #ifdef TC_MACOSX
21: # ifdef __ppc__
22: # include <ppc/ucontext.h>
23: # else
24: # include <i386/ucontext.h>
25: # endif
26: #endif
27:
28: #include "FatalErrorHandler.h"
29:
30: namespace TrueCrypt
31: {
32: static terminate_handler DefaultTerminateHandler;
33:
34: struct FatalErrorReport
35: {
36: bool UnhandledException;
37: };
38:
39: #ifdef TC_UNIX
40: static void OnFatalProgramErrorSignal (int, siginfo_t *signalInfo, void *contextArg)
41: {
42: ucontext_t *context = (ucontext_t *) contextArg;
43: uint64 faultingInstructionAddress = 0;
44:
45: #ifdef TC_LINUX
46: # ifdef REG_EIP
47: faultingInstructionAddress = context->uc_mcontext.gregs[REG_EIP];
48: # elif defined (REG_RIP)
49: faultingInstructionAddress = context->uc_mcontext.gregs[REG_RIP];
50: # endif
51:
52: #elif defined (TC_MACOSX)
53: # ifdef __ppc__
54: faultingInstructionAddress = context->uc_mcontext->ss.srr0;
55: # elif defined (__x86_64__)
56: faultingInstructionAddress = context->uc_mcontext->ss.rip;
57: # else
58: faultingInstructionAddress = context->uc_mcontext->ss.eip;
59: # endif
60:
61: #endif
62:
63: wstringstream vars;
64: vars << L"err=" << signalInfo->si_signo;
65: vars << L"&addr=" << hex << faultingInstructionAddress << dec;
66:
67: #if wxUSE_STACKWALKER == 1
68:
69: class StackWalker : public wxStackWalker
70: {
71: public:
72: StackWalker () : FrameCount (0) { }
73:
74: void OnStackFrame (const wxStackFrame &frame)
75: {
76: if (FrameCount > 8)
77: return;
78:
79: StackVars << L"&st" << FrameCount++ << L"=" << hex << frame.GetAddress();
80: }
81:
82: int FrameCount;
83: wstringstream StackVars;
84: };
85:
86: StackWalker stackWalker;
87: stackWalker.Walk (1);
88: if (!stackWalker.StackVars.str().empty())
89: vars << stackWalker.StackVars.str();
90:
91: #endif // wxUSE_STACKWALKER
92:
93: wxString url = Gui->GetHomepageLinkURL (L"err-report", vars.str());
94: url.Replace (L"0x", L"");
95:
96: wxString msg = L"A critical error has occured and TrueCrypt must be terminated. If this is caused by a bug in TrueCrypt, we would like to fix it. To help us, you can send us an automatically generated error report containing the following items:\n\n- Program version\n- Operating system version\n- Hardware architecture\n- Error category\n- Error address\n";
97: #if wxUSE_STACKWALKER == 1
98: msg += L"- TrueCrypt call stack\n";
99: #endif
100: msg += L"\nIf you select 'Yes', the following URL (which contains the entire error report) will be opened in your default Internet browser.\n\n";
101: #ifdef __WXGTK__
102: wxString fUrl = url;
103: fUrl.Replace (L"&st", L" &st");
104: msg += fUrl;
105: #else
106: msg += url;
107: #endif
108: msg += L"\n\nDo you want to send us the error report?";
109:
110: if (Gui->AskYesNo (msg, true))
111: wxLaunchDefaultBrowser (url, wxBROWSER_NEW_WINDOW);
112:
113: _exit (1);
114: }
115: #endif // TC_UNIX
116:
117: void FatalErrorHandler::Deregister()
118: {
119: #ifdef TC_UNIX
120: signal (SIGILL, SIG_DFL);
121: signal (SIGFPE, SIG_DFL);
122: signal (SIGSEGV, SIG_DFL);
123: signal (SIGBUS, SIG_DFL);
124: signal (SIGSYS, SIG_DFL);
125: #endif
126:
127: #ifndef TC_WINDOWS
128: std::set_terminate (DefaultTerminateHandler);
129: #endif
130: }
131:
132: void FatalErrorHandler::OnTerminate ()
133: {
134: try
135: {
136: throw;
137: }
138: catch (UserAbort&)
139: {
140: }
141: catch (Exception &e)
142: {
143: wxString vars;
144:
145: wxString exName = StringConverter::ToWide (StringConverter::GetTypeName (typeid (e)));
146: if (exName.find (L"TrueCrypt::") != string::npos)
147: exName = exName.Mid (11);
148:
149: wxString exPos = StringConverter::ToWide (e.what());
150: if (exPos.find (L"TrueCrypt::") != string::npos)
151: exPos = exPos.Mid (11);
152:
153: vars << L"&exception=" << exName;
154: vars << L"&exlocation=" << exPos;
155: vars.Replace (L"::", L".");
156: vars.Replace (L":", L".");
157:
158: wxString url = Gui->GetHomepageLinkURL (L"err-report", vars);
159:
160: wxString msg = L"An unhandled exception has occured and TrueCrypt must be terminated. If this is caused by a bug in TrueCrypt, we would like to fix it. To help us, you can send us an automatically generated error report containing the following items:\n\n- Program version\n- Operating system version\n- Hardware architecture\n- Error description\n- Error location\n";
161: msg += L"\nIf you select 'Yes', the following URL (which contains the entire error report) will be opened in your default Internet browser.\n\n";
162: msg += url;
163: msg += L"\n\nDo you want to send us the error report?";
164:
165: if (Gui->AskYesNo (msg, true))
166: wxLaunchDefaultBrowser (url, wxBROWSER_NEW_WINDOW);
167:
168: }
169: catch (exception &e)
170: {
171: Gui->ShowError (e);
172: }
173: catch (...)
174: {
175: Gui->ShowError (_("Unknown exception occurred."));
176: }
177:
178: _exit (1);
179: }
180:
181: void FatalErrorHandler::Register ()
182: {
183: #ifndef TC_WINDOWS
184: // OnUnhandledException() seems to be called only on Windows
185: DefaultTerminateHandler = std::set_terminate (OnTerminate);
186: #endif
187:
188: #ifdef TC_UNIX
189: struct sigaction action;
190: Memory::Zero (&action, sizeof (action));
191: action.sa_flags = SA_SIGINFO;
192: action.sa_sigaction = OnFatalProgramErrorSignal;
193:
194: throw_sys_if (sigaction (SIGILL, &action, nullptr) == -1);
195: throw_sys_if (sigaction (SIGFPE, &action, nullptr) == -1);
196: throw_sys_if (sigaction (SIGSEGV, &action, nullptr) == -1);
197: throw_sys_if (sigaction (SIGBUS, &action, nullptr) == -1);
198: throw_sys_if (sigaction (SIGSYS, &action, nullptr) == -1);
199: #endif
200: }
201: }
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