Using struct -r allows much faster execution when iterating through a file;
on 3909 elements struct struct.member takes 192s vs. 3s with -r
---
Sorry for the delay, here's another take at allowing struct -r with a
specific field specified.
I didn't post that v2 back in Feb because I wasn't totally happy with
it; I can't say I now am but might as well get your take on it...
Thanks!
defs.h | 2 ++
symbols.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++++-------
2 files changed, 63 insertions(+), 8 deletions(-)
diff --git a/defs.h b/defs.h
index e852ddf..a3f828d 100644
--- a/defs.h
+++ b/defs.h
@@ -2283,6 +2283,7 @@ struct array_table {
#define MEMBER_TYPE_REQUEST ((struct datatype_member *)(-3))
#define STRUCT_SIZE_REQUEST ((struct datatype_member *)(-4))
#define MEMBER_TYPE_NAME_REQUEST ((struct datatype_member *)(-5))
+#define ANON_MEMBER_SIZE_REQUEST ((struct datatype_member *)(-6))
#define STRUCT_SIZE(X) datatype_info((X), NULL, STRUCT_SIZE_REQUEST)
#define UNION_SIZE(X) datatype_info((X), NULL, STRUCT_SIZE_REQUEST)
@@ -2294,6 +2295,7 @@ struct array_table {
#define MEMBER_TYPE(X,Y) datatype_info((X), (Y), MEMBER_TYPE_REQUEST)
#define MEMBER_TYPE_NAME(X,Y) ((char *)datatype_info((X), (Y), MEMBER_TYPE_NAME_REQUEST))
#define ANON_MEMBER_OFFSET(X,Y) datatype_info((X), (Y), ANON_MEMBER_OFFSET_REQUEST)
+#define ANON_MEMBER_SIZE(X,Y) datatype_info((X), (Y), ANON_MEMBER_SIZE_REQUEST)
/*
* The following set of macros can only be used with pre-intialized fields
diff --git a/symbols.c b/symbols.c
index 9c3032d..b32e480 100644
--- a/symbols.c
+++ b/symbols.c
@@ -145,6 +145,7 @@ static void print_union(char *, ulong);
static void dump_datatype_member(FILE *, struct datatype_member *);
static void dump_datatype_flags(ulong, FILE *);
static long anon_member_offset(char *, char *);
+static long anon_member_size(char *, char *);
static int gdb_whatis(char *);
static void do_datatype_declaration(struct datatype_member *, ulong);
static int member_to_datatype(char *, struct datatype_member *, ulong);
@@ -5604,14 +5605,17 @@ long
datatype_info(char *name, char *member, struct datatype_member *dm)
{
struct gnu_request *req;
- long offset, size, member_size;
+ long offset, size, member_size;
int member_typecode;
- ulong type_found;
+ ulong type_found;
char buf[BUFSIZE];
- if (dm == ANON_MEMBER_OFFSET_REQUEST)
+ if (dm == ANON_MEMBER_OFFSET_REQUEST)
return anon_member_offset(name, member);
+ if (dm == ANON_MEMBER_SIZE_REQUEST)
+ return anon_member_size(name, member);
+
strcpy(buf, name);
req = (struct gnu_request *)GETBUF(sizeof(struct gnu_request));
@@ -5828,6 +5832,46 @@ retry:
return value;
}
+/*
+ * Determine the size of a member in an anonymous union
+ * in a structure or union.
+ */
+static long
+anon_member_size(char *name, char *member)
+{
+ char buf[BUFSIZE];
+ ulong value;
+ int type;
+
+ value = -1;
+ type = STRUCT_REQUEST;
+ sprintf(buf, "printf \"%%ld\", (u64)(&((struct %s*)0)->%s + 1) - (u64)&((struct %s*)0)->%s",
+ name, member, name, member);
+ open_tmpfile2();
+retry:
+ if (gdb_pass_through(buf, pc->tmpfile2, GNU_RETURN_ON_ERROR)) {
+ rewind(pc->tmpfile2);
+ if (fgets(buf, BUFSIZE, pc->tmpfile2)) {
+ if (hexadecimal(buf, 0))
+ value = htol(buf, RETURN_ON_ERROR|QUIET, NULL);
+ else if (STRNEQ(buf, "(nil)"))
+ value = 0;
+ }
+ }
+
+ if ((value == -1) && (type == STRUCT_REQUEST)) {
+ type = UNION_REQUEST;
+ sprintf(buf, "printf \"%%ld\", (u64)(&((union %s*)0)->%s + 1) - (u64)&((union %s*)0)->%s",
+ name, member, name, member);
+ rewind(pc->tmpfile2);
+ goto retry;
+ }
+
+ close_tmpfile2();
+
+ return value;
+}
+
/*
* Get the basic type info for a symbol. Let the caller pass in the
* gnu_request structure to have access to the full response; in either
@@ -6617,6 +6661,9 @@ do_datatype_addr(struct datatype_member *dm, ulong addr, int count,
i = 0;
do {
if (argc_members) {
+ if (argc_members > 1 && flags & SHOW_RAW_DATA)
+ error(FATAL,
+ "only up to one member-specific output allowed with -r\n");
/* This call works fine with fields
* of the second, third, ... levels.
* There is no need to fix it
@@ -6625,9 +6672,6 @@ do_datatype_addr(struct datatype_member *dm, ulong addr, int count,
ANON_MEMBER_QUERY))
error(FATAL, "invalid data structure reference: %s.%s\n",
dm->name, memberlist[i]);
- if (flags & SHOW_RAW_DATA)
- error(FATAL,
- "member-specific output not allowed with -r\n");
}
/*
@@ -6636,9 +6680,18 @@ do_datatype_addr(struct datatype_member *dm, ulong addr, int count,
if (flags & SHOW_OFFSET) {
dm->vaddr = addr;
do_datatype_declaration(dm, flags | (dm->flags & TYPEDEF));
- } else if (flags & SHOW_RAW_DATA)
+ } else if (flags & SHOW_RAW_DATA) {
+ if (dm->member) {
+ addr += dm->member_offset;
+ len = MEMBER_SIZE(dm->name, dm->member);
+ if (len < 0)
+ len = ANON_MEMBER_SIZE(dm->name, dm->member);
+ if (len < 0)
+ error(FATAL, "invalid data structure reference: %s.%s\n",
+ dm->name, dm->member);
+ }
raw_data_dump(addr, len, flags & STRUCT_VERBOSE);
- else if ((flags & DEREF_POINTERS) && !dm->member) {
+ } else if ((flags & DEREF_POINTERS) && !dm->member) {
print_struct_with_dereference(addr, dm, flags);
} else {
if (dm->member)
--
2.26.0
--
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