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commit 06871ae84096ed1672eb76f44cea4d5dbe79ae24
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Author: Pedro Alves <palves@redhat.com>
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Date: Wed Sep 20 16:12:54 2017 +0100
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Make "list ambiguous" show symbol names too
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Currently, with an ambiguous "list first,last", we get:
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(gdb) list bar,main
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Specified first line 'bar' is ambiguous:
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file: "src/gdb/testsuite/gdb.cp/overload.cc", line number: 97
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file: "src/gdb/testsuite/gdb.cp/overload.cc", line number: 98
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This commit makes gdb's output above a bit clearer by printing the
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symbol name as well:
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(gdb) list bar,main
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Specified first line 'bar' is ambiguous:
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file: "src/gdb/testsuite/gdb.cp/overload.cc", line number: 97, symbol: "bar(A)"
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file: "src/gdb/testsuite/gdb.cp/overload.cc", line number: 98, symbol: "bar(B)"
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And while at it, makes gdb print the symbol name when actually listing
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multiple locations too. I.e., before (with "set listsize 2"):
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(gdb) list bar
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file: "src/gdb/testsuite/gdb.cp/overload.cc", line number: 97
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96
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97 int bar (A) { return 11; }
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file: "src/gdb/testsuite/gdb.cp/overload.cc", line number: 98
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97 int bar (A) { return 11; }
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98 int bar (B) { return 22; }
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After:
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(gdb) list bar
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file: "src/gdb/testsuite/gdb.cp/overload.cc", line number: 97, symbol: "bar(A)"
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96
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97 int bar (A) { return 11; }
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file: "src/gdb/testsuite/gdb.cp/overload.cc", line number: 98, symbol: "bar(B)"
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97 int bar (A) { return 11; }
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98 int bar (B) { return 22; }
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Currently, the result of decoding a linespec loses information about
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the original symbol that was found. All we end up with is an address.
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This makes it difficult to find the original symbol again to get at
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its print name. Fix that by storing a pointer to the symbol in the
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sal. We already store the symtab and obj_section, so it feels like a
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natural progression to me. This avoids having to do any extra symbol
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lookup too.
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gdb/ChangeLog:
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2017-09-20 Pedro Alves <palves@redhat.com>
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* cli/cli-cmds.c (list_command): Use print_sal_location.
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(print_sal_location): New function.
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(ambiguous_line_spec): Use print_sal_location.
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* linespec.c (symbol_to_sal): Record the symbol in the sal.
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* symtab.c (find_function_start_sal): Likewise.
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* symtab.h (symtab_and_line::symbol): New field.
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gdb/testsuite/ChangeLog:
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2017-09-20 Pedro Alves <palves@redhat.com>
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* gdb.base/list-ambiguous.exp (test_list_ambiguous_symbol): Expect
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symbol names in gdb's output.
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* gdb.cp/overload.exp ("list all overloads"): Likewise.
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### a/gdb/ChangeLog
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### b/gdb/ChangeLog
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## -1,5 +1,14 @@
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2017-09-20 Pedro Alves <palves@redhat.com>
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+ * cli/cli-cmds.c (list_command): Use print_sal_location.
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+ (print_sal_location): New function.
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+ (ambiguous_line_spec): Use print_sal_location.
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+ * linespec.c (symbol_to_sal): Record the symbol in the sal.
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+ * symtab.c (find_function_start_sal): Likewise.
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+ * symtab.h (symtab_and_line::symbol): New field.
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+
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+2017-09-20 Pedro Alves <palves@redhat.com>
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+
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* linespec.c (minsym_found): Handle non-text minsyms.
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(symbol_to_sal): Record a sal.pc for non-block, non-label symbols.
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Index: gdb-8.0.1/gdb/linespec.c
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===================================================================
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--- gdb-8.0.1.orig/gdb/linespec.c 2017-10-20 21:28:18.444609776 +0200
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+++ gdb-8.0.1/gdb/linespec.c 2017-10-20 21:29:12.382094104 +0200
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@@ -3864,6 +3864,7 @@
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{
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init_sal (result);
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result->symtab = symbol_symtab (sym);
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+ result->symbol = sym;
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result->line = SYMBOL_LINE (sym);
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result->pc = SYMBOL_VALUE_ADDRESS (sym);
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result->pspace = SYMTAB_PSPACE (result->symtab);
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@@ -3879,6 +3880,7 @@
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/* We know its line number. */
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init_sal (result);
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result->symtab = symbol_symtab (sym);
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+ result->symbol = sym;
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result->line = SYMBOL_LINE (sym);
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result->pspace = SYMTAB_PSPACE (result->symtab);
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return 1;
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Index: gdb-8.0.1/gdb/symtab.c
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===================================================================
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--- gdb-8.0.1.orig/gdb/symtab.c 2017-10-20 21:28:18.446609794 +0200
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+++ gdb-8.0.1/gdb/symtab.c 2017-10-20 21:29:51.390444377 +0200
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@@ -3478,6 +3478,7 @@
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fixup_symbol_section (sym, NULL);
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section = SYMBOL_OBJ_SECTION (symbol_objfile (sym), sym);
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sal = find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym)), section, 0);
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+ sal.symbol = sym;
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if (funfirstline && sal.symtab != NULL
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&& (COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (sal.symtab))
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@@ -3501,6 +3502,7 @@
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sal.pspace = current_program_space;
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sal.pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
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sal.section = section;
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+ sal.symbol = sym;
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}
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if (funfirstline)
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Index: gdb-8.0.1/gdb/symtab.h
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===================================================================
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--- gdb-8.0.1.orig/gdb/symtab.h 2017-10-20 21:28:21.205634569 +0200
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+++ gdb-8.0.1/gdb/symtab.h 2017-10-20 21:28:40.933811716 +0200
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@@ -1420,6 +1420,7 @@
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struct program_space *pspace;
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struct symtab *symtab;
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+ struct symbol *symbol;
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struct obj_section *section;
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/* Line number. Line numbers start at 1 and proceed through symtab->nlines.
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0 is never a valid line number; it is used to indicate that line number
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