a22bd3dc73
Currently, when instrumenting for the race detector, the compiler inserts racefuncentry/racefuncentryfp at the entry of instrumented functions. racefuncentry takes the caller's PC. On AMD64, we synthesize a node which points to -8(FP) which is where the return address is stored. Later this node turns to a special Arg in SSA that is not really an argument. This causes problems in the new ABI work so that special node has to be special-cased. This CL changes the special node to a call to getcallerpc, which lowers to an intrinsic in SSA. This also unifies AMD64 code path and LR machine code path, as getcallerpc works on all platforms. Change-Id: I1377e140b91e0473cfcadfda221f26870c1b124d Reviewed-on: https://go-review.googlesource.com/c/go/+/297929 Trust: Cherry Zhang <cherryyz@google.com> Reviewed-by: David Chase <drchase@google.com> |
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README.md
The Go Programming Language
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