diff options
| -rw-r--r-- | gdb/ChangeLog | 8 | ||||
| -rw-r--r-- | gdb/record-btrace.c | 200 |
2 files changed, 186 insertions, 22 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 2d34e03..f805e50 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,13 @@ 2015-11-04 Markus Metzger <markus.t.metzger@intel.com> + * record-btrace.c (struct btrace_line_range): New. + (btrace_mk_line_range, btrace_line_range_add) + (btrace_line_range_is_empty, btrace_line_range_contains_range) + (btrace_find_line_range, btrace_print_lines): New. + (btrace_insn_history): Add source interleaving algorithm. + +2015-11-04 Markus Metzger <markus.t.metzger@intel.com> + * disasm.h (DISASSEMBLY_SPECULATION): New. (struct disasm_insn): New. (gdb_pretty_print_insn): New. diff --git a/gdb/record-btrace.c b/gdb/record-btrace.c index 3f068e2..ee54d9e 100644 --- a/gdb/record-btrace.c +++ b/gdb/record-btrace.c @@ -526,6 +526,140 @@ ui_out_field_uint (struct ui_out *uiout, const char *fld, unsigned int val) ui_out_field_fmt (uiout, fld, "%u", val); } +/* A range of source lines. */ + +struct btrace_line_range +{ + /* The symtab this line is from. */ + struct symtab *symtab; + + /* The first line (inclusive). */ + int begin; + + /* The last line (exclusive). */ + int end; +}; + +/* Construct a line range. */ + +static struct btrace_line_range +btrace_mk_line_range (struct symtab *symtab, int begin, int end) +{ + struct btrace_line_range range; + + range.symtab = symtab; + range.begin = begin; + range.end = end; + + return range; +} + +/* Add a line to a line range. */ + +static struct btrace_line_range +btrace_line_range_add (struct btrace_line_range range, int line) +{ + if (range.end <= range.begin) + { + /* This is the first entry. */ + range.begin = line; + range.end = line + 1; + } + else if (line < range.begin) + range.begin = line; + else if (range.end < line) + range.end = line; + + return range; +} + +/* Return non-zero if RANGE is empty, zero otherwise. */ + +static int +btrace_line_range_is_empty (struct btrace_line_range range) +{ + return range.end <= range.begin; +} + +/* Return non-zero if LHS contains RHS, zero otherwise. */ + +static int +btrace_line_range_contains_range (struct btrace_line_range lhs, + struct btrace_line_range rhs) +{ + return ((lhs.symtab == rhs.symtab) + && (lhs.begin <= rhs.begin) + && (rhs.end <= lhs.end)); +} + +/* Find the line range associated with PC. */ + +static struct btrace_line_range +btrace_find_line_range (CORE_ADDR pc) +{ + struct btrace_line_range range; + struct linetable_entry *lines; + struct linetable *ltable; + struct symtab *symtab; + int nlines, i; + + symtab = find_pc_line_symtab (pc); + if (symtab == NULL) + return btrace_mk_line_range (NULL, 0, 0); + + ltable = SYMTAB_LINETABLE (symtab); + if (ltable == NULL) + return btrace_mk_line_range (symtab, 0, 0); + + nlines = ltable->nitems; + lines = ltable->item; + if (nlines <= 0) + return btrace_mk_line_range (symtab, 0, 0); + + range = btrace_mk_line_range (symtab, 0, 0); + for (i = 0; i < nlines - 1; i++) + { + if ((lines[i].pc == pc) && (lines[i].line != 0)) + range = btrace_line_range_add (range, lines[i].line); + } + + return range; +} + +/* Print source lines in LINES to UIOUT. + + UI_ITEM_CHAIN is a cleanup chain for the last source line and the + instructions corresponding to that source line. When printing a new source + line, we do the cleanups for the open chain and open a new cleanup chain for + the new source line. If the source line range in LINES is not empty, this + function will leave the cleanup chain for the last printed source line open + so instructions can be added to it. */ + +static void +btrace_print_lines (struct btrace_line_range lines, struct ui_out *uiout, + struct cleanup **ui_item_chain, int flags) +{ + enum print_source_lines_flags psl_flags; + int line; + + psl_flags = 0; + if (flags & DISASSEMBLY_FILENAME) + psl_flags |= PRINT_SOURCE_LINES_FILENAME; + + for (line = lines.begin; line < lines.end; ++line) + { + if (*ui_item_chain != NULL) + do_cleanups (*ui_item_chain); + + *ui_item_chain + = make_cleanup_ui_out_tuple_begin_end (uiout, "src_and_asm_line"); + + print_source_lines (lines.symtab, line, line + 1, psl_flags); + + make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn"); + } +} + /* Disassemble a section of the recorded instruction trace. */ static void @@ -534,13 +668,29 @@ btrace_insn_history (struct ui_out *uiout, const struct btrace_insn_iterator *begin, const struct btrace_insn_iterator *end, int flags) { + struct ui_file *stb; + struct cleanup *cleanups, *ui_item_chain; + struct disassemble_info di; struct gdbarch *gdbarch; struct btrace_insn_iterator it; + struct btrace_line_range last_lines; DEBUG ("itrace (0x%x): [%u; %u)", flags, btrace_insn_number (begin), btrace_insn_number (end)); + flags |= DISASSEMBLY_SPECULATIVE; + gdbarch = target_gdbarch (); + stb = mem_fileopen (); + cleanups = make_cleanup_ui_file_delete (stb); + di = gdb_disassemble_info (gdbarch, stb); + last_lines = btrace_mk_line_range (NULL, 0, 0); + + make_cleanup_ui_out_list_begin_end (uiout, "asm_insns"); + + /* UI_ITEM_CHAIN is a cleanup chain for the last source line and the + instructions corresponding to that line. */ + ui_item_chain = NULL; for (it = *begin; btrace_insn_cmp (&it, end) != 0; btrace_insn_next (&it, 1)) { @@ -563,37 +713,43 @@ btrace_insn_history (struct ui_out *uiout, } else { - char prefix[4]; + struct disasm_insn dinsn; - /* We may add a speculation prefix later. We use the same space - that is used for the pc prefix. */ - if ((flags & DISASSEMBLY_OMIT_PC) == 0) - strncpy (prefix, pc_prefix (insn->pc), 3); - else + if ((flags & DISASSEMBLY_SOURCE) != 0) { - prefix[0] = ' '; - prefix[1] = ' '; - prefix[2] = ' '; + struct btrace_line_range lines; + + lines = btrace_find_line_range (insn->pc); + if (!btrace_line_range_is_empty (lines) + && !btrace_line_range_contains_range (last_lines, lines)) + { + btrace_print_lines (lines, uiout, &ui_item_chain, flags); + last_lines = lines; + } + else if (ui_item_chain == NULL) + { + ui_item_chain + = make_cleanup_ui_out_tuple_begin_end (uiout, + "src_and_asm_line"); + /* No source information. */ + make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn"); + } + + gdb_assert (ui_item_chain != NULL); } - prefix[3] = 0; - /* Print the instruction index. */ - ui_out_field_uint (uiout, "index", btrace_insn_number (&it)); - ui_out_text (uiout, "\t"); + memset (&dinsn, 0, sizeof (dinsn)); + dinsn.number = btrace_insn_number (&it); + dinsn.addr = insn->pc; - /* Indicate speculative execution by a leading '?'. */ if ((insn->flags & BTRACE_INSN_FLAG_SPECULATIVE) != 0) - prefix[0] = '?'; + dinsn.is_speculative = 1; - /* Print the prefix; we tell gdb_disassembly below to omit it. */ - ui_out_field_fmt (uiout, "prefix", "%s", prefix); - - /* Disassembly with '/m' flag may not produce the expected result. - See PR gdb/11833. */ - gdb_disassembly (gdbarch, uiout, NULL, flags | DISASSEMBLY_OMIT_PC, - 1, insn->pc, insn->pc + 1); + gdb_pretty_print_insn (gdbarch, uiout, &di, &dinsn, flags, stb); } } + + do_cleanups (cleanups); } /* The to_insn_history method of target record-btrace. */ |