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authorPedro Alves <palves@redhat.com>2017-09-04 20:21:15 +0100
committerPedro Alves <palves@redhat.com>2017-09-04 20:21:15 +0100
commit858be34c5a03bb8973679ebf00d360182434dc00 (patch)
treef8f2ee3b71ccc4b20b8501a00b113975b4c48013 /gdb/expprint.c
parentdd5901a6a5bba75f3dee49f9a27640eedad90afe (diff)
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Handle "p S::method()::static_var" in the C++ parser
This commit makes "print S::method()::static_var" actually find the debug symbol for static_var. Currently, you get: (gdb) print S::method()::static_var A syntax error in expression, near `'. Quoting the whole string would seemingly work before the previous patch that made GDB stop assuming int for no-debug-info variables: (gdb) p 'S::method()::static_var' $1 = 1 ... except that's incorrect output, because: (gdb) ptype 'S::method()::static_var' type = <data variable, no debug info> The way to make it work correctly currently is by quoting the function/method part, like this: (gdb) print 'S::method()'::static_var $1 = {i1 = 1, i2 = 2, i3 = 3} (gdb) ptype 'S::method()'::static_var type = struct aggregate { int i1; int i2; int i3; } At least after the "stop assuming int" patch, this is what we now get: (gdb) p 'S::method()::static_var' 'S::method()::static_var' has unknown type; cast it to its declared type (gdb) p (struct aggregate) 'S::method()::static_var' $1 = {i1 = 1, i2 = 2, i3 = 3} However, IMO, users shouldn't really have to care about any of this. GDB should Just Work, without quoting, IMO. So here's a patch that implements support for that in the C++ parser. With this patch, you now get: (gdb) p S::method()::S_M_s_var_aggregate $1 = {i1 = 1, i2 = 2, i3 = 3} (gdb) ptype S::method()::S_M_s_var_aggregate type = struct aggregate { int i1; int i2; int i3; } gdb/ChangeLog: 2017-09-04 Pedro Alves <palves@redhat.com> (%type <voidval>): Add function_method. * c-exp.y (exp): New production for calls with no arguments. (function_method, function_method_void_or_typelist): New productions. (exp): New production for "method()::static_var". * eval.c (evaluate_subexp_standard): Handle OP_FUNC_STATIC_VAR. * expprint.c (print_subexp_standard, dump_subexp_body_standard): Handle OP_FUNC_STATIC_VAR. * parse.c (operator_length_standard): Handle OP_FUNC_STATIC_VAR. * std-operator.def (OP_FUNC_STATIC_VAR): New. gdb/testsuite/ChangeLog: 2017-09-04 Pedro Alves <palves@redhat.com> * gdb.base/local-static.c: New. * gdb.base/local-static.cc: New. * gdb.base/local-static.exp: New.
Diffstat (limited to 'gdb/expprint.c')
-rw-r--r--gdb/expprint.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/gdb/expprint.c b/gdb/expprint.c
index 0697a77..fad20e8 100644
--- a/gdb/expprint.c
+++ b/gdb/expprint.c
@@ -141,6 +141,14 @@ print_subexp_standard (struct expression *exp, int *pos,
}
return;
+ case OP_FUNC_STATIC_VAR:
+ {
+ tem = longest_to_int (exp->elts[pc + 1].longconst);
+ (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
+ fputs_filtered (&exp->elts[pc + 1].string, stream);
+ }
+ return;
+
case OP_VAR_ENTRY_VALUE:
{
(*pos) += 2;
@@ -999,6 +1007,16 @@ dump_subexp_body_standard (struct expression *exp,
elt += 4 + BYTES_TO_EXP_ELEM (len + 1);
}
break;
+
+ case OP_FUNC_STATIC_VAR:
+ {
+ int len = longest_to_int (exp->elts[elt].longconst);
+ const char *var_name = &exp->elts[elt + 1].string;
+ fprintf_filtered (stream, "Field name: `%.*s'", len, var_name);
+ elt += 3 + BYTES_TO_EXP_ELEM (len + 1);
+ }
+ break;
+
case TYPE_INSTANCE:
{
LONGEST len;