[LLVMbugs] [Bug 24294] New: gcda writer is not big-endian safe

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=24294

            Bug ID: 24294
           Summary: gcda writer is not big-endian safe
           Product: compiler-rt
           Version: unspecified
          Hardware: All
                OS: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P
         Component: compiler-rt
          Assignee: unassignedbugs at nondot.org
          Reporter: chmeeedalf at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

GCDAProfiling.c writes out magic numbers as little-endian byte strings, but
reads them back as native-endian integers.  For example, (r241824) line 371
has:

 val = read_32bit_value();

While line 398 has:

 write_bytes("\0\0\xa1\1", 4);

When reading on a big-endian platform, this would read back as 0x0000a101,
which would obviously fail the check on line 375.

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