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gcov-tool: Support file input from stdin

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	* gcov-io.cc (GCOV_MODE_STDIN): Define.
	(gcov_position): For gcov-tool, return calculated position if file is
	stdin.
	(gcov_open):  For gcov-tool, use stdin if filename is NULL.
	(gcov_close): For gcov-tool, do not close stdin.
	(gcov_read_bytes): For gcov-tool, update position if file is stdin.
	(gcov_sync): For gcov-tool, discard input if file is stdin.
This commit is contained in:
Sebastian Huber 2022-03-30 21:40:55 +02:00
parent 39d80300b3
commit e543d9d2cf
1 changed files with 38 additions and 0 deletions
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38
gcc/gcov-io.cc
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@ -35,8 +35,13 @@ struct gcov_var
int error; /* < 0 overflow, > 0 disk error. */
int mode; /* < 0 writing, > 0 reading. */
int endian; /* Swap endianness. */
#ifdef IN_GCOV_TOOL
gcov_position_t pos; /* File position for stdin support. */
#endif
} gcov_var;
#define GCOV_MODE_STDIN 2
/* Save the current position in the gcov file. */
/* We need to expose this function when compiling for gcov-tool. */
#ifndef IN_GCOV_TOOL
@ -45,6 +50,10 @@ static inline
gcov_position_t
gcov_position (void)
{
#ifdef IN_GCOV_TOOL
if (gcov_var.mode == GCOV_MODE_STDIN)
return gcov_var.pos;
#endif
return ftell (gcov_var.file);
}
@ -108,6 +117,16 @@ gcov_open (const char *name, int mode)
#if !IN_LIBGCOV || defined (IN_GCOV_TOOL)
gcov_var.endian = 0;
#endif
#ifdef IN_GCOV_TOOL
gcov_var.pos = 0;
if (!name)
{
gcov_nonruntime_assert (gcov_var.mode > 0);
gcov_var.file = stdin;
gcov_var.mode = GCOV_MODE_STDIN;
return 1;
}
#endif
#if GCOV_LOCKED
if (mode > 0)
{
@ -190,6 +209,11 @@ gcov_open (const char *name, int mode)
GCOV_LINKAGE int
gcov_close (void)
{
#ifdef IN_GCOV_TOOL
if (gcov_var.file == stdin)
gcov_var.file = 0;
else
#endif
if (gcov_var.file)
{
if (fclose (gcov_var.file))
@ -363,6 +387,9 @@ gcov_read_bytes (void *buffer, unsigned count)
if (read != 1)
return NULL;
#ifdef IN_GCOV_TOOL
gcov_var.pos += count;
#endif
return buffer;
}
@ -499,6 +526,17 @@ gcov_sync (gcov_position_t base, gcov_unsigned_t length)
{
gcov_nonruntime_assert (gcov_var.mode > 0);
base += length;
#ifdef IN_GCOV_TOOL
if (gcov_var.mode == GCOV_MODE_STDIN)
{
while (gcov_var.pos < base)
{
++gcov_var.pos;
(void)fgetc (gcov_var.file);
}
return;
}
#endif
fseek (gcov_var.file, base, SEEK_SET);
}
#endif