Kevin Kadooka / mbed-dev

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Revision 47:e32b5dd8af6d, committed 2016-01-11

Comitter:
mbed_official
Date:
Mon Jan 11 17:00:10 2016 +0000
Parent:
46:cb4f85f96d35
Child:
48:b854a29e778d
Commit message:
Synchronized with git revision 42ceddf229b846d16879773feded31713dc9d5e9

Full URL: https://github.com/mbedmicro/mbed/commit/42ceddf229b846d16879773feded31713dc9d5e9/

Fix m7core

Changed in this revision

common/RawSerial.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/common/RawSerial.cpp	Mon Jan 11 09:45:10 2016 +0000
+++ b/common/RawSerial.cpp	Mon Jan 11 17:00:10 2016 +0000
@@ -47,7 +47,10 @@
 int RawSerial::printf(const char *format, ...) {
     std::va_list arg;
     va_start(arg, format);
-    int len = vsnprintf(NULL, 0, format, arg);
+    // ARMCC microlib does not properly handle a size of 0.
+    // As a workaround supply a dummy buffer with a size of 1.
+    char dummy_buf[1];
+    int len = vsnprintf(dummy_buf, sizeof(dummy_buf), format, arg);
     if (len < STRING_STACK_LIMIT) {
         char temp[STRING_STACK_LIMIT];
         vsprintf(temp, format, arg);