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runtime: convert traceback*.c to Go

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The two converted files were nearly identical.
Instead of continuing that duplication, I merged them
into a single traceback.go.

Tested on arm, amd64, amd64p32, and 386.

LGTM=r
R=golang-codereviews, remyoudompheng, dave, r
CC=dvyukov, golang-codereviews, iant, khr
https://golang.org/cl/134200044
This commit is contained in:
Russ Cox 2014-09-02 15:12:53 -04:00
parent 8e89f87158
commit fa2af441f1
14 changed files with 668 additions and 838 deletions
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12
src/pkg/runtime/stack.c
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@ -477,6 +477,7 @@ copyabletopsegment(G *gp)
Func *f;
FuncVal *fn;
StackMap *stackmap;
bool (*cb)(Stkframe*, void*);
if(gp->stackbase == 0)
runtime·throw("stackbase == 0");
@ -486,7 +487,8 @@ copyabletopsegment(G *gp)
// Check that each frame is copyable. As a side effect,
// count the frames.
runtime·gentraceback(~(uintptr)0, ~(uintptr)0, 0, gp, 0, nil, 0x7fffffff, checkframecopy, &cinfo, false);
cb = checkframecopy;
runtime·gentraceback(~(uintptr)0, ~(uintptr)0, 0, gp, 0, nil, 0x7fffffff, &cb, &cinfo, false);
if(StackDebug >= 1 && cinfo.frames != -1)
runtime·printf("copystack: %d copyable frames\n", cinfo.frames);
@ -680,8 +682,10 @@ adjustframe(Stkframe *frame, void *arg)
// adjust inargs and outargs
if(frame->arglen != 0) {
stackmap = runtime·funcdata(f, FUNCDATA_ArgsPointerMaps);
if(stackmap == nil)
if(stackmap == nil) {
runtime·printf("size %d\n", (int32)frame->arglen);
runtime·throw("no arg info");
}
bv = runtime·stackmapdata(stackmap, pcdata);
if(StackDebug >= 3)
runtime·printf(" args\n");
@ -773,6 +777,7 @@ copystack(G *gp, uintptr nframes, uintptr newsize)
AdjustInfo adjinfo;
Stktop *oldtop, *newtop;
uint32 oldstatus;
bool (*cb)(Stkframe*, void*);
if(gp->syscallstack != 0)
runtime·throw("can't handle stack copy in syscall yet");
@ -797,7 +802,8 @@ copystack(G *gp, uintptr nframes, uintptr newsize)
adjinfo.oldstk = oldstk;
adjinfo.oldbase = oldbase;
adjinfo.delta = newbase - oldbase;
runtime·gentraceback(~(uintptr)0, ~(uintptr)0, 0, gp, 0, nil, nframes, adjustframe, &adjinfo, false);
cb = adjustframe;
runtime·gentraceback(~(uintptr)0, ~(uintptr)0, 0, gp, 0, nil, nframes, &cb, &adjinfo, false);
// adjust other miscellaneous things that have pointers into stacks.
adjustctxt(gp, &adjinfo);