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gcov-tool: Flexible endian adjustment for merging coverage data

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gcc/ChangeLog:
2020-05-27  Dong JianQiang  <dongjianqiang2@huawei.com>

	PR gcov-profile/95332
	* gcov-io.c (gcov_var::endian): Move field.
	(from_file): Add IN_GCOV_TOOL check.
	* gcov-io.h (gcov_magic): Ditto.

libgcc/ChangeLog:
2020-05-27  Dong JianQiang  <dongjianqiang2@huawei.com>

	PR gcov-profile/95332
	* libgcov-util.c (read_gcda_file): Call gcov_magic.
	* libgcov.h (gcov_magic): Disable GCC poison.

(cherry picked from commit 17d1594bfe)
This commit is contained in:
Martin Liska 2020-05-28 08:16:58 +02:00
parent e2786fecd8
commit a243b63169
No known key found for this signature in database
GPG Key ID: 4DC182DC0FA73785
4 changed files with 9 additions and 7 deletions
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6
gcc/gcov-io.c
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@ -48,6 +48,7 @@ struct gcov_var
unsigned overread; /* Number of words overread. */
int error; /* < 0 overflow, > 0 disk error. */
int mode; /* < 0 writing, > 0 reading */
int endian; /* Swap endianness. */
#if IN_LIBGCOV
/* Holds one block plus 4 bytes, thus all coverage reads & writes
fit within this buffer and we always can transfer GCOV_BLOCK_SIZE
@ -55,7 +56,6 @@ struct gcov_var
or 8 byte objects. */
gcov_unsigned_t buffer[GCOV_BLOCK_SIZE + 1];
#else
int endian; /* Swap endianness. */
/* Holds a variable length block, as the compiler can write
strings and needs to backtrack. */
size_t alloc;
@ -100,7 +100,7 @@ gcov_rewrite (void)
static inline gcov_unsigned_t from_file (gcov_unsigned_t value)
{
#if !IN_LIBGCOV
#if !IN_LIBGCOV || defined (IN_GCOV_TOOL)
if (gcov_var.endian)
{
value = (value >> 16) | (value << 16);
@ -222,7 +222,7 @@ gcov_close (void)
return gcov_var.error;
}
#if !IN_LIBGCOV
#if !IN_LIBGCOV || defined (IN_GCOV_TOOL)
/* Check if MAGIC is EXPECTED. Use it to determine endianness of the
file. Returns +1 for same endian, -1 for other endian and zero for
not EXPECTED. */

3
gcc/gcov-io.h
View File

@ -326,6 +326,9 @@ struct gcov_summary
#if !IN_LIBGCOV
GCOV_LINKAGE int gcov_open (const char */*name*/, int /*direction*/);
#endif
#if !IN_LIBGCOV || defined (IN_GCOV_TOOL)
GCOV_LINKAGE int gcov_magic (gcov_unsigned_t, gcov_unsigned_t);
#endif

5
libgcc/libgcov-util.c
View File

@ -261,7 +261,7 @@ read_gcda_file (const char *filename)
{
unsigned tags[4];
unsigned depth = 0;
unsigned magic, version;
unsigned version;
struct gcov_info *obj_info;
int i;
@ -276,8 +276,7 @@ read_gcda_file (const char *filename)
}
/* Read magic. */
magic = gcov_read_unsigned ();
if (magic != GCOV_DATA_MAGIC)
if (!gcov_magic (gcov_read_unsigned (), GCOV_DATA_MAGIC))
{
fnotice (stderr, "%s:not a gcov data file\n", filename);
gcov_close ();

2
libgcc/libgcov.h
View File

@ -149,7 +149,7 @@ extern struct gcov_info *gcov_list;
/* Poison these, so they don't accidentally slip in. */
#pragma GCC poison gcov_write_string gcov_write_tag gcov_write_length
#pragma GCC poison gcov_time gcov_magic
#pragma GCC poison gcov_time
#ifdef HAVE_GAS_HIDDEN
#define ATTRIBUTE_HIDDEN __attribute__ ((__visibility__ ("hidden")))