• Russ Cox's avatar
    ld: detect stack overflow due to NOSPLIT · d9fd1144
    Russ Cox authored
    Fix problems found.
    
    On amd64, various library routines had bigger
    stack frames than expected, because large function
    calls had been added.
    
    runtime.assertI2T: nosplit stack overflow
            120	assumed on entry to runtime.assertI2T
            8	after runtime.assertI2T uses 112
            0	on entry to runtime.newTypeAssertionError
            -8	on entry to runtime.morestack01
    
    runtime.assertE2E: nosplit stack overflow
            120	assumed on entry to runtime.assertE2E
            16	after runtime.assertE2E uses 104
            8	on entry to runtime.panic
            0	on entry to runtime.morestack16
            -8	after runtime.morestack16 uses 8
    
    runtime.assertE2T: nosplit stack overflow
            120	assumed on entry to runtime.assertE2T
            16	after runtime.assertE2T uses 104
            8	on entry to runtime.panic
            0	on entry to runtime.morestack16
            -8	after runtime.morestack16 uses 8
    
    runtime.newselect: nosplit stack overflow
            120	assumed on entry to runtime.newselect
            56	after runtime.newselect uses 64
            48	on entry to runtime.printf
            8	after runtime.printf uses 40
            0	on entry to vprintf
            -8	on entry to runtime.morestack16
    
    runtime.selectdefault: nosplit stack overflow
            120	assumed on entry to runtime.selectdefault
            56	after runtime.selectdefault uses 64
            48	on entry to runtime.printf
            8	after runtime.printf uses 40
            0	on entry to vprintf
            -8	on entry to runtime.morestack16
    
    runtime.selectgo: nosplit stack overflow
            120	assumed on entry to runtime.selectgo
            0	after runtime.selectgo uses 120
            -8	on entry to runtime.gosched
    
    On arm, 5c was tagging functions NOSPLIT that should
    not have been, like the recursive function printpanics:
    
    printpanics: nosplit stack overflow
            124	assumed on entry to printpanics
            112	after printpanics uses 12
            108	on entry to printpanics
            96	after printpanics uses 12
            92	on entry to printpanics
            80	after printpanics uses 12
            76	on entry to printpanics
            64	after printpanics uses 12
            60	on entry to printpanics
            48	after printpanics uses 12
            44	on entry to printpanics
            32	after printpanics uses 12
            28	on entry to printpanics
            16	after printpanics uses 12
            12	on entry to printpanics
            0	after printpanics uses 12
            -4	on entry to printpanics
    
    R=r, r2
    CC=golang-dev
    https://golang.org/cl/4188061
    d9fd1144
iface.c 13.9 KB