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Inline fake snprintf to avoid linkage issues on Windows.

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Summary:
dllexport doesn't work if linking against a static library with its own
copy of snprintf.

Reviewers: zturner

Subscribers: zturner, lldb-commits

Differential Revision: http://reviews.llvm.org/D12206

llvm-svn: 245610
This commit is contained in:
Chaoren Lin 2015-08-20 20:53:15 +00:00
parent 419bb33b0b
commit ee3c206021
2 changed files with 18 additions and 8 deletions
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15
lldb/include/lldb/Host/windows/win32.h
View File

@ -65,8 +65,19 @@ int strcasecmp(const char* s1, const char* s2);
int strncasecmp(const char* s1, const char* s2, size_t n);
#if _MSC_VER < 1900
int __declspec(dllexport)
snprintf(char *buffer, size_t count, const char *format, ...);
namespace lldb_private {
int vsnprintf(char *buffer, size_t count, const char *format, va_list argptr);
}
// inline to avoid linkage conflicts
int inline snprintf(char *buffer, size_t count, const char *format, ...)
{
va_list argptr;
va_start(argptr, format);
int r = lldb_private::vsnprintf(buffer, count, format, argptr);
va_end(argptr);
return r;
}
#endif
#define STDIN_FILENO 0

11
lldb/source/Host/windows/Windows.cpp
View File

@ -203,18 +203,17 @@ int usleep(uint32_t useconds)
}
#if _MSC_VER < 1900
int snprintf(char *buffer, size_t count, const char *format, ...)
namespace lldb_private {
int vsnprintf(char *buffer, size_t count, const char *format, va_list argptr)
{
int old_errno = errno;
va_list argptr;
va_start(argptr, format);
int r = vsnprintf(buffer, count, format, argptr);
int r = ::vsnprintf(buffer, count, format, argptr);
int new_errno = errno;
buffer[count-1] = '\0';
if (r == -1 || r == count)
{
FILE *nul = fopen("nul", "w");
int bytes_written = vfprintf(nul, format, argptr);
int bytes_written = ::vfprintf(nul, format, argptr);
fclose(nul);
if (bytes_written < count)
errno = new_errno;
@ -224,9 +223,9 @@ int snprintf(char *buffer, size_t count, const char *format, ...)
r = bytes_written;
}
}
va_end(argptr);
return r;
}
} // namespace lldb_private
#endif
#endif // _MSC_VER