diff options
| author | Russ Cox <rsc@golang.org> | 2014-08-31 22:49:14 -0400 |
|---|---|---|
| committer | Russ Cox <rsc@golang.org> | 2014-08-31 22:49:14 -0400 |
| commit | a564350b3dcfd480034780da11487c4456809429 (patch) | |
| tree | ca655e006228b73f339b0dc3db71f3dfaf7fae56 /src/liblink | |
| parent | 21fcd05421c57caf41815f070c8bbf7016fd17fe (diff) | |
| download | go-a564350b3dcfd480034780da11487c4456809429.tar.gz | |
cmd/ld: diagnose Go calling C
For example:
go build -ldflags -C cmd/go 2>&1 | awk '{print $NF}' | sort | uniq -c | sort -nr
LGTM=khr
R=khr, josharian
CC=golang-codereviews
https://codereview.appspot.com/135170044
Diffstat (limited to 'src/liblink')
| -rw-r--r-- | src/liblink/objfile.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/src/liblink/objfile.c b/src/liblink/objfile.c index 22c9199d5..dc463d474 100644 --- a/src/liblink/objfile.c +++ b/src/liblink/objfile.c @@ -38,7 +38,8 @@ // - type [int] // - name [string] // - version [int] -// - dupok [int] +// - flags [int] +// 1 dupok // - size [int] // - gotype [symbol reference] // - p [data block] @@ -50,7 +51,9 @@ // - args [int] // - locals [int] // - nosplit [int] -// - leaf [int] +// - flags [int] +// 1 leaf +// 2 C function // - nlocal [int] // - local [nlocal automatics] // - pcln [pcln table] @@ -289,6 +292,8 @@ writesym(Link *ctxt, Biobuf *b, LSym *s) Bprint(ctxt->bso, "t=%d ", s->type); if(s->dupok) Bprint(ctxt->bso, "dupok "); + if(s->cfunc) + Bprint(ctxt->bso, "cfunc "); if(s->nosplit) Bprint(ctxt->bso, "nosplit "); Bprint(ctxt->bso, "size=%lld value=%lld", (vlong)s->size, (vlong)s->value); @@ -351,7 +356,7 @@ writesym(Link *ctxt, Biobuf *b, LSym *s) wrint(b, s->args); wrint(b, s->locals); wrint(b, s->nosplit); - wrint(b, s->leaf); + wrint(b, s->leaf | s->cfunc<<1); n = 0; for(a = s->autom; a != nil; a = a->link) n++; @@ -519,6 +524,7 @@ readsym(Link *ctxt, Biobuf *f, char *pkg, char *pn) if(v != 0 && v != 1) sysfatal("invalid symbol version %d", v); dupok = rdint(f); + dupok &= 1; size = rdint(f); if(v != 0) @@ -573,7 +579,9 @@ readsym(Link *ctxt, Biobuf *f, char *pkg, char *pn) s->args = rdint(f); s->locals = rdint(f); s->nosplit = rdint(f); - s->leaf = rdint(f); + v = rdint(f); + s->leaf = v&1; + s->cfunc = v&2; n = rdint(f); for(i=0; i<n; i++) { a = emallocz(sizeof *a); @@ -629,6 +637,8 @@ readsym(Link *ctxt, Biobuf *f, char *pkg, char *pn) Bprint(ctxt->bso, "t=%d ", s->type); if(s->dupok) Bprint(ctxt->bso, "dupok "); + if(s->cfunc) + Bprint(ctxt->bso, "cfunc "); if(s->nosplit) Bprint(ctxt->bso, "nosplit "); Bprint(ctxt->bso, "size=%lld value=%lld", (vlong)s->size, (vlong)s->value); |