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Annotate ColoredPrintf with the format attribute and fix bugs.

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googletest doesn't currently build with clang's very aggressive
-Wformat-nonliteral warning. It requires that all non-literal format
strings come from the argument of a function annotated with a compatible
format attribute.

Fixing that reports that ColoredPrintf's callers weren't passing the
normal -Wformat warning. Some messages were passed directly into the
format string rather than via "%s".
This commit is contained in:
David Benjamin 2016-12-21 20:40:58 -05:00
parent 5e7fd50e17
commit 53c478d639
2 changed files with 21 additions and 3 deletions
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17
googletest/include/gtest/internal/gtest-port.h
View File

@ -874,6 +874,23 @@ using ::std::tuple_size;
# define GTEST_ATTRIBUTE_UNUSED_
#endif
// Use this annotation before a function that takes a printf format string.
#if defined(__GNUC__) && !defined(COMPILER_ICC)
# if defined(__MINGW_PRINTF_FORMAT)
// MinGW has two different printf implementations. Ensure the format macro
// matches the selected implementation. See
// https://sourceforge.net/p/mingw-w64/wiki2/gnu%20printf/.
# define GTEST_ATTRIBUTE_PRINTF_(string_index, first_to_check) \
__attribute__((__format__(__MINGW_PRINTF_FORMAT, string_index, \
first_to_check)))
# else
# define GTEST_ATTRIBUTE_PRINTF_(string_index, first_to_check) \
__attribute__((__format__(__printf__, string_index, first_to_check)))
# endif
#else
# define GTEST_ATTRIBUTE_PRINTF_(string_index, first_to_check)
#endif
// A macro to disallow operator=
// This should be used in the private: declarations for a class.
#define GTEST_DISALLOW_ASSIGN_(type)\

7
googletest/src/gtest.cc
View File

@ -2953,6 +2953,7 @@ bool ShouldUseColor(bool stdout_is_tty) {
// cannot simply emit special characters and have the terminal change colors.
// This routine must actually emit the characters rather than return a string
// that would be colored when printed, as can be done on Linux.
GTEST_ATTRIBUTE_PRINTF_(2, 3)
void ColoredPrintf(GTestColor color, const char* fmt, ...) {
va_list args;
va_start(args, fmt);
@ -4729,7 +4730,7 @@ bool ShouldShard(const char* total_shards_env,
<< "Invalid environment variables: you have "
<< kTestShardIndex << " = " << shard_index
<< ", but have left " << kTestTotalShards << " unset.\n";
ColoredPrintf(COLOR_RED, msg.GetString().c_str());
ColoredPrintf(COLOR_RED, "%s", msg.GetString().c_str());
fflush(stdout);
exit(EXIT_FAILURE);
} else if (total_shards != -1 && shard_index == -1) {
@ -4737,7 +4738,7 @@ bool ShouldShard(const char* total_shards_env,
<< "Invalid environment variables: you have "
<< kTestTotalShards << " = " << total_shards
<< ", but have left " << kTestShardIndex << " unset.\n";
ColoredPrintf(COLOR_RED, msg.GetString().c_str());
ColoredPrintf(COLOR_RED, "%s", msg.GetString().c_str());
fflush(stdout);
exit(EXIT_FAILURE);
} else if (shard_index < 0 || shard_index >= total_shards) {
@ -4746,7 +4747,7 @@ bool ShouldShard(const char* total_shards_env,
<< kTestShardIndex << " < " << kTestTotalShards
<< ", but you have " << kTestShardIndex << "=" << shard_index
<< ", " << kTestTotalShards << "=" << total_shards << ".\n";
ColoredPrintf(COLOR_RED, msg.GetString().c_str());
ColoredPrintf(COLOR_RED, "%s", msg.GetString().c_str());
fflush(stdout);
exit(EXIT_FAILURE);
}