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runtime: add explicit INT $3
at end of Darwin amd64 sigtramp
The omission of this instruction could confuse the traceback code if a SIGPROF occurred during a signal handler. The traceback code would trace up to sigtramp, but would then get confused because it would see a PC address that did not appear to be in the function. Fixes #16453. Change-Id: I2b3d53e0b272fb01d9c2cb8add22bad879d3eebc Reviewed-on: https://go-review.googlesource.com/25104 Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
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@ -244,6 +244,7 @@ TEXT runtime·sigtramp(SB),NOSPLIT,$32
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MOVQ R8, 24(SP) // ctx
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MOVQ $runtime·sigtrampgo(SB), AX
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CALL AX
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INT $3 // not reached (see issue 16453)
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TEXT runtime·mmap(SB),NOSPLIT,$0
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MOVQ addr+0(FP), DI // arg 1 addr
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