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Diffstat (limited to 'gdbsupport/gdb_wait.cc')
-rw-r--r-- | gdbsupport/gdb_wait.cc | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/gdbsupport/gdb_wait.cc b/gdbsupport/gdb_wait.cc new file mode 100644 index 00000000000..32139949c62 --- /dev/null +++ b/gdbsupport/gdb_wait.cc @@ -0,0 +1,85 @@ +/* Support code for standard wait macros in gdb_wait.h. + + Copyright (C) 2019 Free Software Foundation, Inc. + + This file is part of GDB. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +#include "common-defs.h" + +#include "gdb_wait.h" + +#ifdef __MINGW32__ + +/* The underlying idea is that when a Windows program is terminated by + a fatal exception, its exit code is the value of that exception, as + defined by the various EXCEPTION_* symbols in the Windows API + headers. We thus emulate WTERMSIG etc. by translating the fatal + exception codes to more-or-less equivalent Posix signals. + + The translation below is not perfect, because a program could + legitimately exit normally with a status whose value happens to + have the high bits set, but that's extremely rare, to say the + least, and it is deemed such a negligibly small probability of + false positives is justified by the utility of reporting the + terminating signal in the "normal" cases. */ + +# include <signal.h> + +# define WIN32_LEAN_AND_MEAN +# include <windows.h> /* for EXCEPTION_* constants */ + +struct xlate_status +{ + /* The exit status (actually, fatal exception code). */ + DWORD status; + + /* The corresponding signal value. */ + int sig; +}; + +int +windows_status_to_termsig (unsigned long status) +{ + static const xlate_status status_xlate_tbl[] = + { + {EXCEPTION_ACCESS_VIOLATION, SIGSEGV}, + {EXCEPTION_IN_PAGE_ERROR, SIGSEGV}, + {EXCEPTION_INVALID_HANDLE, SIGSEGV}, + {EXCEPTION_ILLEGAL_INSTRUCTION, SIGILL}, + {EXCEPTION_NONCONTINUABLE_EXCEPTION, SIGILL}, + {EXCEPTION_ARRAY_BOUNDS_EXCEEDED, SIGSEGV}, + {EXCEPTION_FLT_DENORMAL_OPERAND, SIGFPE}, + {EXCEPTION_FLT_DIVIDE_BY_ZERO, SIGFPE}, + {EXCEPTION_FLT_INEXACT_RESULT, SIGFPE}, + {EXCEPTION_FLT_INVALID_OPERATION, SIGFPE}, + {EXCEPTION_FLT_OVERFLOW, SIGFPE}, + {EXCEPTION_FLT_STACK_CHECK, SIGFPE}, + {EXCEPTION_FLT_UNDERFLOW, SIGFPE}, + {EXCEPTION_INT_DIVIDE_BY_ZERO, SIGFPE}, + {EXCEPTION_INT_OVERFLOW, SIGFPE}, + {EXCEPTION_PRIV_INSTRUCTION, SIGILL}, + {EXCEPTION_STACK_OVERFLOW, SIGSEGV}, + {CONTROL_C_EXIT, SIGTERM} + }; + + for (const xlate_status &x : status_xlate_tbl) + if (x.status == status) + return x.sig; + + return -1; +} + +#endif /* __MINGW32__ */ |