[compiler-rt] r177578 - Create a coverage initialization function.

[Alexander Zinenko]

Hello, Bill!

I'm sorry, but this commit seems having break clang-x86_64-debian-fast
 buildbot.
(http://lab.llvm.org:8011/builders/clang-x86_64-debian-fast/builds/2934)
/home/llvmbb/llvm-build-dir/clang-x86_64-debian-fast/llvm.src/projects/compiler-rt/lib/profile/GCDAProfiling.c:398:5:
error: implicit declaration of function 'atexit' is invalid in C99
[-Werror,-Wimplicit-function-declaration]
    atexit(llvm_delete_flush_function_list);


On 20 March 2013 23:11, Bill Wendling <isanbard at gmail.com> wrote:

> Author: void
> Date: Wed Mar 20 16:11:47 2013
> New Revision: 177578
>
> URL: http://llvm.org/viewvc/llvm-project?rev=177578&view=rev
> Log:
> Create a coverage initialization function.
>
> This function replaces the call of `atexit' from being generated in the
> compile
> units. Basically, it registers the "writeout" and "flush" functions (if
> present). It will generate calls to the `atexit' function for cleanups and
> final
> writeout functions, but only once. This is better than checking for `main',
> because a library may not have a `main' function in it.
> <rdar://problem/12439551>
>
> Modified:
>     compiler-rt/trunk/SDKs/darwin/usr/include/stdlib.h
>     compiler-rt/trunk/lib/profile/GCDAProfiling.c
>
> Modified: compiler-rt/trunk/SDKs/darwin/usr/include/stdlib.h
> URL:
> http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/SDKs/darwin/usr/include/stdlib.h?rev=177578&r1=177577&r2=177578&view=diff
>
> ==============================================================================
> --- compiler-rt/trunk/SDKs/darwin/usr/include/stdlib.h (original)
> +++ compiler-rt/trunk/SDKs/darwin/usr/include/stdlib.h Wed Mar 20 16:11:47
> 2013
> @@ -22,6 +22,7 @@
>  typedef __SIZE_TYPE__ size_t;
>
>  void abort(void) __attribute__((__noreturn__));
> +int atexit(void (*)(void));
>  int atoi(const char *);
>  void free(void *);
>  char *getenv(const char *);
>
> Modified: compiler-rt/trunk/lib/profile/GCDAProfiling.c
> URL:
> http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/profile/GCDAProfiling.c?rev=177578&r1=177577&r2=177578&view=diff
>
> ==============================================================================
> --- compiler-rt/trunk/lib/profile/GCDAProfiling.c (original)
> +++ compiler-rt/trunk/lib/profile/GCDAProfiling.c Wed Mar 20 16:11:47 2013
> @@ -331,7 +331,7 @@ void llvm_register_writeout_function(wri
>    }
>  }
>
> -void __llvm_writeout_files() {
> +void llvm_writeout_files() {
>    struct writeout_fn_node *curr = writeout_fn_head;
>
>    while (curr) {
> @@ -381,3 +381,22 @@ void llvm_delete_flush_function_list() {
>
>    flush_fn_head = flush_fn_tail = NULL;
>  }
> +
> +void llvm_gcov_init(writeout_fn wfn, flush_fn ffn) {
> +  static int atexit_ran = 0;
> +
> +  if (wfn)
> +    llvm_register_writeout_function(wfn);
> +
> +  if (ffn)
> +    llvm_register_flush_function(ffn);
> +
> +  if (atexit_ran == 0) {
> +    atexit_ran = 1;
> +
> +    /* Make sure we write out the data and delete the data structures. */
> +    atexit(llvm_delete_flush_function_list);
> +    atexit(llvm_delete_writeout_function_list);
> +    atexit(llvm_writeout_files);
> +  }
> +}
>
>
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