Brian Paul | 65ced47 | 2006-06-02 14:50:28 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 Thomas Sondergaard All Rights Reserved. |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 5 | * copy of this software and associated documentation files (the "Software"), |
| 6 | * to deal in the Software without restriction, including without limitation |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| 9 | * Software is furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice shall be included |
| 12 | * in all copies or substantial portions of the Software. |
| 13 | * |
| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 15 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 17 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
| 18 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 19 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 20 | */ |
| 21 | |
| 22 | #include "gltrace_support.h" |
Guillaume Melquiond | 4430597 | 2008-07-14 08:50:36 -0600 | [diff] [blame] | 23 | #include <cstdlib> |
| 24 | #include <cstring> |
Brian | 03b9e16 | 2007-03-01 07:39:27 -0700 | [diff] [blame] | 25 | #include <assert.h> |
Brian Paul | 65ced47 | 2006-06-02 14:50:28 +0000 | [diff] [blame] | 26 | #include <sstream> |
| 27 | #include <fstream> |
| 28 | #include <iomanip> |
| 29 | #include <execinfo.h> |
| 30 | #include <cxxabi.h> |
| 31 | #include <sys/time.h> |
| 32 | |
| 33 | namespace { |
| 34 | |
| 35 | const char * |
| 36 | demangle (const char * mangled) throw() |
| 37 | { |
| 38 | static char buf[4096]; |
| 39 | int status; |
Brian | 887d3c6 | 2007-03-01 07:42:42 -0700 | [diff] [blame] | 40 | size_t length = sizeof(buf)-1; |
Brian Paul | 65ced47 | 2006-06-02 14:50:28 +0000 | [diff] [blame] | 41 | |
| 42 | memset (buf, 0, sizeof(buf)); |
| 43 | |
| 44 | if (!mangled) |
| 45 | return 0; |
| 46 | |
| 47 | char * demangled = __cxxabiv1::__cxa_demangle(mangled, |
| 48 | buf, |
| 49 | &length, |
| 50 | &status); |
| 51 | if (demangled && !status) |
| 52 | return demangled; |
| 53 | else |
| 54 | return mangled; |
| 55 | } |
| 56 | |
| 57 | void |
| 58 | printStackTrace (void **stackframes, |
| 59 | int stackframe_size, |
| 60 | std::ostream & out ) |
| 61 | { |
| 62 | char **strings = 0; |
| 63 | std::stringstream ss; |
| 64 | |
| 65 | // this might actually fail if memory is tight or we are in a |
| 66 | // signal handler |
| 67 | strings = backtrace_symbols (stackframes, stackframe_size); |
| 68 | |
| 69 | ss << "Backtrace :"; |
| 70 | |
| 71 | if (stackframe_size == gltrace::MAX_STACKFRAMES) |
| 72 | ss << "(possibly incomplete maximal number of frames exceeded):" << std::endl; |
| 73 | else |
| 74 | ss << std::endl; |
| 75 | |
| 76 | out << ss.str(); |
| 77 | |
| 78 | // the first frame is the constructor of the exception |
| 79 | // the last frame always seem to be bogus? |
| 80 | for (int i = 0; strings && i < stackframe_size-1; ++i) { |
| 81 | char libname[257], funcname[2049]; |
| 82 | unsigned int address=0, funcoffset = 0x0; |
| 83 | |
| 84 | memset (libname,0,sizeof(libname)); |
| 85 | memset (funcname,0,sizeof(funcname)); |
| 86 | |
| 87 | strcpy (funcname,"??"); |
| 88 | strcpy (libname, "??"); |
| 89 | |
| 90 | int scanned = sscanf (strings[i], "%256[^(] ( %2048[^+] + %x ) [ %x ]", |
| 91 | libname, |
| 92 | funcname, |
| 93 | &funcoffset, |
| 94 | &address); |
| 95 | |
| 96 | /* ok, so no function was mentioned in the backtrace */ |
| 97 | if (scanned < 4) { |
| 98 | scanned = sscanf (strings[i], "%256[^([] [ %x ]", |
| 99 | libname, |
| 100 | &address); |
| 101 | } |
| 102 | |
| 103 | if (funcname[0] == '_') { |
| 104 | const char * demangled; |
| 105 | if ((demangled = demangle(funcname) ) != funcname) { |
| 106 | strncpy (funcname, demangled, sizeof(funcname)-1); |
| 107 | } |
| 108 | } |
| 109 | else |
| 110 | strcat (funcname," ()"); |
| 111 | |
| 112 | out << "\t#" << i << std::hex << " 0x" << address << " in " << funcname |
| 113 | << " at 0x" << funcoffset << " (from " << libname << ")" << std::endl; |
| 114 | } |
| 115 | |
| 116 | free (strings); |
| 117 | } |
| 118 | |
| 119 | |
| 120 | } // anon namespace |
| 121 | |
| 122 | namespace gltrace { |
| 123 | |
| 124 | std::string getStackTrace(int count, int first) { |
| 125 | ++first; |
| 126 | std::stringstream ss; |
| 127 | const int BA_MAX = 1000; |
| 128 | assert(count + first <= BA_MAX); |
| 129 | void *ba[BA_MAX]; |
| 130 | int n = backtrace(ba, count+first); |
| 131 | |
| 132 | printStackTrace( &ba[first], n-first, ss); |
| 133 | |
| 134 | return ss.str(); |
| 135 | } |
| 136 | |
| 137 | std::ostream &timeNow(std::ostream &os) { |
| 138 | |
| 139 | struct timeval now; |
| 140 | struct tm t; |
Guillaume Melquiond | 4430597 | 2008-07-14 08:50:36 -0600 | [diff] [blame] | 141 | static char const *months[12] = |
Brian Paul | 65ced47 | 2006-06-02 14:50:28 +0000 | [diff] [blame] | 142 | { |
| 143 | "Jan", "Feb", "Mar", "Apr", "May", "Jun", |
| 144 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" |
| 145 | }; |
| 146 | |
| 147 | gettimeofday (&now, 0); |
| 148 | localtime_r ((time_t*) &now.tv_sec, &t); |
| 149 | |
| 150 | os |
| 151 | << months[t.tm_mon] << " " |
| 152 | << std::setw(2) << t.tm_mday << " " |
| 153 | << std::setw(2) << t.tm_hour << ":" |
| 154 | << std::setw(2) << t.tm_min << ":" |
| 155 | << std::setw(2) << t.tm_sec << "." |
| 156 | << std::setw(3) << now.tv_usec/1000; |
| 157 | return os; |
| 158 | } |
| 159 | |
| 160 | logstream::logstream(const char *filename) { |
| 161 | if (!filename) |
| 162 | init(std::cerr.rdbuf()); |
| 163 | else { |
| 164 | file_os.reset(new std::ofstream(filename)); |
| 165 | if (file_os->good()) |
| 166 | init(file_os->rdbuf()); |
| 167 | else { |
| 168 | std::cerr << "ERROR: gltrace: Failed to open '" << filename |
| 169 | << "' for writing. Falling back to stderr." << std::endl; |
| 170 | init(std::cerr.rdbuf()); |
| 171 | } |
| 172 | } |
| 173 | *this << std::setfill('0'); // setw used in timeNow |
| 174 | } |
| 175 | |
| 176 | |
| 177 | Config::Config() : |
| 178 | logCalls(true), |
| 179 | checkErrors(true), |
| 180 | logTime(true), |
| 181 | log(getenv("GLTRACE_LOGFILE")) { |
| 182 | if (const char *v = getenv("GLTRACE_LOG_CALLS")) |
| 183 | logCalls = strncmp("1", v, 1) == 0; |
| 184 | if (const char *v = getenv("GLTRACE_CHECK_ERRORS")) |
| 185 | checkErrors = strncmp("1", v, 1) == 0; |
| 186 | if (const char *v = getenv("GLTRACE_LOG_TIME")) |
| 187 | logTime = strncmp("1", v, 1) == 0; |
| 188 | } |
| 189 | |
| 190 | // *The* config |
| 191 | Config config; |
| 192 | |
| 193 | } // namespace gltrace |