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8 Commits

Author SHA1 Message Date
Aaron Ballman 1de59c5d92 Improve diagnostic checking for va_start to also warn on other instances of undefined behavior, such as a parameter declared with the register keyword in C, or a parameter of a type that undergoes default argument promotion. 
This helps cover some more of the CERT secure coding rule EXP58-CPP. Pass an object of the correct type to va_start (https://www.securecoding.cert.org/confluence/display/cplusplus/EXP58-CPP.+Pass+an+object+of+the+correct+type+to+va_start).

llvm-svn: 267338
 2016-04-24 13:30:21 +00:00
Aaron Ballman 05164816f0 Clarifying the wording of this diagnostic; it confused parameter and argument. 
llvm-svn: 266644
 2016-04-18 18:10:53 +00:00
Charles Davis c7d5c94f78 Support __builtin_ms_va_list. 
Summary:
This change adds support for `__builtin_ms_va_list`, a GCC extension for
variadic `ms_abi` functions. The existing `__builtin_va_list` support is
inadequate for this because `va_list` is defined differently in the Win64
ABI vs. the System V/AMD64 ABI.

Depends on D1622.

Reviewers: rsmith, rnk, rjmccall

CC: cfe-commits

Differential Revision: http://reviews.llvm.org/D1623

llvm-svn: 247941
 2015-09-17 20:55:33 +00:00
Chris Lattner 9dd55103c1 print "const intptr_t" instead of "intptr_t const" 
llvm-svn: 113091
 2010-09-05 00:07:29 +00:00
Daniel Dunbar 8fbe78f6fc Update tests to use %clang_cc1 instead of 'clang-cc' or 'clang -cc1'. 
- This is designed to make it obvious that %clang_cc1 is a "test variable"
   which is substituted. It is '%clang_cc1' instead of '%clang -cc1' because it
   can be useful to redefine what gets run as 'clang -cc1' (for example, to set
   a default target).

llvm-svn: 91446
 2009-12-15 20:14:24 +00:00
Chris Lattner a8d2dbd181 Daniel convinced me that accepting "const va_list" arguments to va_arg is 
a really really bad idea.  Now that we emit an error about the unpromoted
type, users should be able to understand what is going on.

llvm-svn: 68447
 2009-04-06 17:07:34 +00:00
Chris Lattner 56382aa890 in va_arg diagnostics, print out the unpromoted type. This makes the 
diagnostic use the va_list typedef more often, see the difference in the 
changed testcase.

llvm-svn: 68441
 2009-04-05 15:49:53 +00:00
Chris Lattner 3f5cd77db2 Add a warning for questionable va_args usage. 
llvm-svn: 68435
 2009-04-05 00:59:53 +00:00