diff options
Diffstat (limited to 'gdbsupport/btrace-common.cc')
| -rw-r--r-- | gdbsupport/btrace-common.cc | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/gdbsupport/btrace-common.cc b/gdbsupport/btrace-common.cc new file mode 100644 index 0000000..7d4f642 --- /dev/null +++ b/gdbsupport/btrace-common.cc @@ -0,0 +1,190 @@ +/* Copyright (C) 2014-2020 Free Software Foundation, Inc. + + Contributed by Intel Corp. <markus.t.metzger@intel.com> + + 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 "btrace-common.h" + + +/* See btrace-common.h. */ + +const char * +btrace_format_string (enum btrace_format format) +{ + switch (format) + { + case BTRACE_FORMAT_NONE: + return _("No or unknown format"); + + case BTRACE_FORMAT_BTS: + return _("Branch Trace Store"); + + case BTRACE_FORMAT_PT: + return _("Intel Processor Trace"); + } + + internal_error (__FILE__, __LINE__, _("Unknown branch trace format")); +} + +/* See btrace-common.h. */ + +const char * +btrace_format_short_string (enum btrace_format format) +{ + switch (format) + { + case BTRACE_FORMAT_NONE: + return "unknown"; + + case BTRACE_FORMAT_BTS: + return "bts"; + + case BTRACE_FORMAT_PT: + return "pt"; + } + + internal_error (__FILE__, __LINE__, _("Unknown branch trace format")); +} + +/* See btrace-common.h. */ + +void +btrace_data::fini () +{ + switch (format) + { + case BTRACE_FORMAT_NONE: + /* Nothing to do. */ + return; + + case BTRACE_FORMAT_BTS: + delete variant.bts.blocks; + variant.bts.blocks = nullptr; + return; + + case BTRACE_FORMAT_PT: + xfree (variant.pt.data); + return; + } + + internal_error (__FILE__, __LINE__, _("Unkown branch trace format.")); +} + +/* See btrace-common.h. */ + +bool +btrace_data::empty () const +{ + switch (format) + { + case BTRACE_FORMAT_NONE: + return true; + + case BTRACE_FORMAT_BTS: + return variant.bts.blocks->empty (); + + case BTRACE_FORMAT_PT: + return (variant.pt.size == 0); + } + + internal_error (__FILE__, __LINE__, _("Unkown branch trace format.")); +} + +/* See btrace-common.h. */ + +void +btrace_data::clear () +{ + fini (); + format = BTRACE_FORMAT_NONE; +} + +/* See btrace-common.h. */ + +int +btrace_data_append (struct btrace_data *dst, + const struct btrace_data *src) +{ + switch (src->format) + { + case BTRACE_FORMAT_NONE: + return 0; + + case BTRACE_FORMAT_BTS: + switch (dst->format) + { + default: + return -1; + + case BTRACE_FORMAT_NONE: + dst->format = BTRACE_FORMAT_BTS; + dst->variant.bts.blocks = new std::vector<btrace_block>; + + /* Fall-through. */ + case BTRACE_FORMAT_BTS: + { + unsigned int blk; + + /* We copy blocks in reverse order to have the oldest block at + index zero. */ + blk = src->variant.bts.blocks->size (); + while (blk != 0) + { + const btrace_block &block + = src->variant.bts.blocks->at (--blk); + dst->variant.bts.blocks->push_back (block); + } + } + } + return 0; + + case BTRACE_FORMAT_PT: + switch (dst->format) + { + default: + return -1; + + case BTRACE_FORMAT_NONE: + dst->format = BTRACE_FORMAT_PT; + dst->variant.pt.data = NULL; + dst->variant.pt.size = 0; + + /* fall-through. */ + case BTRACE_FORMAT_PT: + { + gdb_byte *data; + size_t size; + + size = src->variant.pt.size + dst->variant.pt.size; + data = (gdb_byte *) xmalloc (size); + + memcpy (data, dst->variant.pt.data, dst->variant.pt.size); + memcpy (data + dst->variant.pt.size, src->variant.pt.data, + src->variant.pt.size); + + xfree (dst->variant.pt.data); + + dst->variant.pt.data = data; + dst->variant.pt.size = size; + } + } + return 0; + } + + internal_error (__FILE__, __LINE__, _("Unkown branch trace format.")); +} |