ghc-9.6.0.20230302: The GHC API
Safe HaskellSafe-Inferred
LanguageHaskell2010

GHC.HsToCore.Coverage

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hpcInitCode :: Platform -> Module -> HpcInfo -> CStub Source #

Create HPC initialization C code for a module

Each module compiled with -fhpc declares an initialisation function of the form `hpc_init_module()`, which is emitted into the _stub.c file and annotated with attribute((constructor)) so that it gets executed at startup time.

The function's purpose is to call hs_hpc_module to register this module with the RTS, and it looks something like this:

static void hpc_init_Main(void) __attribute__((constructor));
static void hpc_init_Main(void)
{
  extern StgWord64 _hpc_tickboxes_Main_hpc[];
  hs_hpc_module("Main",8,1150288664,_hpc_tickboxes_Main_hpc);
}