usdt: Have Context::addsem_probe() nop if pid not specified #2954
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This makes bcc_usdt_addsem*() more consistent with the bcc_usdt_enable*() interface where if a USDT::Context was not constructed with a pid the semaphore enablement nops.
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[buildbot, test this please] |
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This makes bcc_usdt_addsem*() more consistent with the bcc_usdt_enable*()
interface where if a USDT::Context was not constructed with a pid the
semaphore enablement nops.