diff options
Diffstat (limited to 'src/pkg/runtime/amd64')
| -rw-r--r-- | src/pkg/runtime/amd64/asm.s | 20 | ||||
| -rw-r--r-- | src/pkg/runtime/amd64/traceback.c | 23 |
2 files changed, 43 insertions, 0 deletions
diff --git a/src/pkg/runtime/amd64/asm.s b/src/pkg/runtime/amd64/asm.s index b6642c13c..cc05435f7 100644 --- a/src/pkg/runtime/amd64/asm.s +++ b/src/pkg/runtime/amd64/asm.s @@ -317,6 +317,26 @@ TEXT runtime·cas(SB), 7, $0 MOVL $1, AX RET +// bool casp(void **val, void *old, void *new) +// Atomically: +// if(*val == old){ +// *val = new; +// return 1; +// } else +// return 0; +TEXT runtime·casp(SB), 7, $0 + MOVQ 8(SP), BX + MOVQ 16(SP), AX + MOVQ 24(SP), CX + LOCK + CMPXCHGQ CX, 0(BX) + JZ 3(PC) + MOVL $0, AX + RET + MOVL $1, AX + RET + + // void jmpdefer(fn, sp); // called from deferreturn. // 1. pop the caller diff --git a/src/pkg/runtime/amd64/traceback.c b/src/pkg/runtime/amd64/traceback.c index d3aae0db9..0f6733c36 100644 --- a/src/pkg/runtime/amd64/traceback.c +++ b/src/pkg/runtime/amd64/traceback.c @@ -164,12 +164,35 @@ gentraceback(byte *pc0, byte *sp, G *g, int32 skip, uintptr *pcbuf, int32 max) continue; } + if(pcbuf == nil && f->entry == (uintptr)runtime·lessstack && g == m->g0) { + // Lessstack is running on scheduler stack. Switch to original goroutine. + runtime·printf("----- lessstack called from goroutine %d -----\n", m->curg->goid); + g = m->curg; + stk = (Stktop*)g->stackbase; + sp = stk->gobuf.sp; + pc = (uintptr)stk->gobuf.pc; + fp = nil; + lr = 0; + continue; + } + // Unwind to next frame. pc = lr; lr = 0; sp = fp; fp = nil; } + + if(pcbuf == nil && (pc = g->gopc) != 0 && (f = runtime·findfunc(pc)) != nil) { + runtime·printf("----- goroutine created by -----\n%S", f->name); + if(pc > f->entry) + runtime·printf("+%p", (uintptr)(pc - f->entry)); + tracepc = pc; // back up to CALL instruction for funcline. + if(n > 0 && pc > f->entry) + tracepc--; + runtime·printf(" %S:%d\n", f->src, runtime·funcline(f, tracepc)); + } + return n; } |