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runtime: fix gdb support for channels.

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R=rsc
CC=golang-dev
https://golang.org/cl/4418043
This commit is contained in:
Luuk van Dijk 2011-04-14 15:32:20 +02:00
parent 9c3ecb3617
commit dd93df35b9
3 changed files with 11 additions and 17 deletions
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10
src/cmd/ld/dwarf.c
View File

@ -1376,20 +1376,18 @@ synthesizemaptypes(DWDie *die)
static void
synthesizechantypes(DWDie *die)
{
DWDie *sudog, *waitq, *link, *hchan,
DWDie *sudog, *waitq, *hchan,
*dws, *dww, *dwh, *elemtype;
DWAttr *a;
int elemsize, linksize, sudogsize;
int elemsize, sudogsize;
sudog = defgotype(lookup_or_diag("type.runtime.sudog"));
waitq = defgotype(lookup_or_diag("type.runtime.waitq"));
link = defgotype(lookup_or_diag("type.runtime.link"));
hchan = defgotype(lookup_or_diag("type.runtime.hchan"));
if (sudog == nil || waitq == nil || link == nil || hchan == nil)
if (sudog == nil || waitq == nil || hchan == nil)
return;
sudogsize = getattr(sudog, DW_AT_byte_size)->value;
linksize = getattr(link, DW_AT_byte_size)->value;
for (; die != nil; die = die->link) {
if (die->abbrev != DW_ABRV_CHANTYPE)
@ -1422,7 +1420,7 @@ synthesizechantypes(DWDie *die)
copychildren(dwh, hchan);
substitutetype(dwh, "recvq", dww);
substitutetype(dwh, "sendq", dww);
substitutetype(dwh, "free", dws);
substitutetype(dwh, "free", defptrto(dws));
newattr(dwh, DW_AT_byte_size, DW_CLS_CONSTANT,
getattr(hchan, DW_AT_byte_size)->value, NULL);

7
src/pkg/runtime/chan.c
View File

@ -9,7 +9,6 @@
static int32 debug = 0;
typedef struct Link Link;
typedef struct WaitQ WaitQ;
typedef struct SudoG SudoG;
typedef struct Select Select;
@ -51,12 +50,6 @@ struct Hchan
// chanbuf(c, i) is pointer to the i'th slot in the buffer.
#define chanbuf(c, i) ((byte*)((c)+1)+(uintptr)(c)->elemsize*(i))
struct Link
{
Link* link; // asynch queue circular linked list
byte elem[8]; // asynch queue data element (+ more)
};
enum
{
// Scase.kind

11
src/pkg/runtime/runtime-gdb.py
View File

@ -122,10 +122,13 @@ class ChanTypePrinter:
return str(self.val.type)
def children(self):
ptr = self.val['recvdataq']
for idx in range(self.val["qcount"]):
yield ('[%d]' % idx, ptr['elem'])
ptr = ptr['link']
# see chan.c chanbuf()
et = [x.type for x in self.val['free'].type.target().fields() if x.name == 'elem'][0]
ptr = (self.val.address + 1).cast(et.pointer())
for i in range(self.val["qcount"]):
j = (self.val["recvx"] + i) % self.val["dataqsiz"]
yield ('[%d]' % i, (ptr + j).dereference())
#
# Register all the *Printer classes above.