<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/95644>95644</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [compiler-rt] [profile] __llvm_profile_get_size_for_buffer not contain the size of the value profile
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          dongjianqiang2
      </td>
    </tr>
</table>

<pre>
    test.c :
```
#include <stdint.h>
#include <stdlib.h>

#include <stdio.h>

int max(int a, int b) {
   return a>b?a:b;
}

int __llvm_profile_runtime = 0;
uint64_t __llvm_profile_get_size_for_buffer(void);
int __llvm_profile_write_buffer(char *);
int __llvm_profile_merge_from_buffer(const char *, uint64_t Size);

int write_buffer(uint64_t, const char *);
int main(int argc, const char *argv[]) {
  if (argc < 2)
    return 1;

  const uint64_t MaxSize = 10000;
  static char Buffer[MaxSize];

  int (*func)(int,int);
  func = max;
  int result=(*func)(1,2);

 uint64_t Size = __llvm_profile_get_size_for_buffer();
  if (Size > MaxSize)
    return 1;
  int Write = __llvm_profile_write_buffer(Buffer);
  if (Write)
    return Write;

  // Actually write it out so we can FileCheck the output.
 FILE *File = fopen(argv[1], "w");
  if (!File)
    return 1;
  if (fwrite(Buffer, 1, Size, File) != Size)
    return 1;
  return fclose(File);
}
```
clang test.c -fprofile-generate
./a.out 111.profdata
llvm-profdata merge 111.profdata -o merge.profdata
warning: 111.profdata: truncated profile data
error: no profile can be merged

</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJyMVU2PozgQ_TXFpRSEDaThwCEfHWml3dMe9hgZKIhnHTtrTDIzv35lIEmHZKZbanWAqvfqVb3CiK6TrSYqIF1Dug1E7w7GFrXR7Tcp9H9S6JYHpal_FI46F1YI8QqiLUQrWEbT33jLY6kr1deEEG86V0vtwgPE778IK1l-DP-CwzzlSO3wKL4Dz_yVAL5Bf1ECzxHe1mMSIlpyvdUoIH4vId4JiFclxFMc3rZzzv1eqfNxf7KmkYr2ttdOHr2OLUY3XC-1Wyb7p-yW3L6TP2nfGLsv-6YhCzw7G1kDz2_oF2UuVjq6I6qDsAh89QnqSLalfWPN8QPU6M7hnWCDN7F_y5_0kfHOOyt_RXj0nO9R0FFIfbXAttUzQNj2PO7UzBjZIPDMg7zHyD3z1bOraWwmFSfyW0d_ie--qcEdFkXR3SHEzgknq1HIeuwsXU8AL2dO7XsAngFfNb2uvJyhL-Cb4X_-gdonDDX9At4fewZLXa8cxNs5FQO-4c_Tf3RnIP3STj0KGoc5Mbxfx_L7kY56__HOvyo7W4lpgi-qDgyvSo2B-ZiB74DvcFW5Xij1Y1w9lA5N77AzeCGshMadVLQ5UPUvugP52Kl34cSx--PPd79bPmeQ3pgT6XGb_LKxYds2CJxfgPNXooEzj_50QkNycxlbvA1hg97N6X3a4MSEwJlX85XRT4-aSpnOM1_FPB9Mj6drpYRucTqCF81k1qIlTVY4GpNC4DsR-nkyxkKfUwsnxpj3eHF9hMMB8pCFCzM-neEuwmqpW4hXj6TxCp3tdSUc1TjJwTuMrDXWJ2lzi3p7Sxqr1GNaUBdxnce5CKhgbyxL4mWWZsGhSMqKNYIoanLKszJLM2JNviTW1BWrkmUgCx7xJFqyNHqLE5aFxFjOoiSuKU2zqmkgiegopAp956GxbSC7rqciT5dJEihRkuqGrx7nmi44BP3SpNvAFsO0yr7tIImU7Fx3Z3HSqeFzWZnjSSqyC-sg3SKk66lRf_f5u4zaOH-sOSH1sOs-jqYZrs9C9XQdXNBbVRycO3X-2zu8Rq10h74MK3MEvvOVph_v8DeqHPDd0FAHfDc2fC74_wEAAP__egdi8A">