Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/os/windows/vm/os_windows.cpp
src/os/windows/vm/os_windows.cpp
- changeset 9478
- f3108e56b502
- parent 9348
- cb9634ab2906
- child 9505
- 79b4c0a88c00
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| 9477:bbd1da3f538f | 9478:f3108e56b502 |
|---|---|
| 1833 st->print(INTPTR_FORMAT " ", er->ExceptionInformation[i]); | 1833 st->print(INTPTR_FORMAT " ", er->ExceptionInformation[i]); |
| 1834 } | 1834 } |
| 1835 } | 1835 } |
| 1836 } | 1836 } |
| 1837 st->cr(); | 1837 st->cr(); |
| 1838 } | |
| 1839 | |
| 1840 | |
| 1841 int os::vsnprintf(char* buf, size_t len, const char* fmt, va_list args) { | |
| 1842 #if _MSC_VER >= 1900 | |
| 1843 // Starting with Visual Studio 2015, vsnprint is C99 compliant. | |
| 1844 int result = ::vsnprintf(buf, len, fmt, args); | |
| 1845 // If an encoding error occurred (result < 0) then it's not clear | |
| 1846 // whether the buffer is NUL terminated, so ensure it is. | |
| 1847 if ((result < 0) && (len > 0)) { | |
| 1848 buf[len - 1] = '\0'; | |
| 1849 } | |
| 1850 return result; | |
| 1851 #else | |
| 1852 // Before Visual Studio 2015, vsnprintf is not C99 compliant, so use | |
| 1853 // _vsnprintf, whose behavior seems to be *mostly* consistent across | |
| 1854 // versions. However, when len == 0, avoid _vsnprintf too, and just | |
| 1855 // go straight to _vscprintf. The output is going to be truncated in | |
| 1856 // that case, except in the unusual case of empty output. More | |
| 1857 // importantly, the documentation for various versions of Visual Studio | |
| 1858 // are inconsistent about the behavior of _vsnprintf when len == 0, | |
| 1859 // including it possibly being an error. | |
| 1860 int result = -1; | |
| 1861 if (len > 0) { | |
| 1862 result = _vsnprintf(buf, len, fmt, args); | |
| 1863 // If output (including NUL terminator) is truncated, the buffer | |
| 1864 // won't be NUL terminated. Add the trailing NUL specified by C99. | |
| 1865 if ((result < 0) || (result >= (int) len)) { | |
| 1866 buf[len - 1] = '\0'; | |
| 1867 } | |
| 1868 } | |
| 1869 if (result < 0) { | |
| 1870 result = _vscprintf(fmt, args); | |
| 1871 } | |
| 1872 return result; | |
| 1873 #endif // _MSC_VER dispatch | |
| 1838 } | 1874 } |
| 1839 | 1875 |
| 1840 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { | 1876 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { |
| 1841 // do nothing | 1877 // do nothing |
| 1842 } | 1878 } |
