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InstrProf: Fix shared object profiling

Description

InstrProf: Fix shared object profiling

Change the API of the instrumented profiling library to work with shared
objects.

  • Most things are now declared hidden, so that each executable gets its own copy.
  • Initialization hooks up a linked list of writers.
  • The raw format with shared objects that are profiled consists of a concatenated series of profiles. llvm-profdata knows how to deal with that since r208938.

rdar://problem/16918688

Details

Committed
dexonsmithMay 15 2014, 6:30 PM
Parents
rL208939: InstrProf: Set profile data to visibility hidden
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