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authorDan Liew <dan@su-root.co.uk>2016-06-07 23:32:50 +0000
committerDan Liew <dan@su-root.co.uk>2016-06-07 23:32:50 +0000
commit1873a496e20a391633fc29665d6620c1ca3191f7 (patch)
treeabb6a28df749fed5b9e653269cdcd941af9d7bb1 /llvm/lib/Fuzzer/FuzzerExtFunctions.h
parent32c940de377ec87a072e3d7c3f3200beec6fe90e (diff)
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[LibFuzzer] Declare and use sanitizer functions in ``fuzzer::ExternalFunctions``
This fixes linking problems on OSX. Unfortunately it turns out we need to use an instance of the ``fuzzer::ExternalFunctions`` object in several places so this commit also replaces all instances with a single global instance. It also turns out initializing a global ``fuzzer::ExternalFunctions`` before main is entered (i.e. letting the object be initialised by the global initializers) is not safe (on OSX the call to ``Printf()`` in the CTOR crashes if it is called from a global initializer) so we instead have a global ``fuzzer::ExternalFunctions*`` and initialize it inside ``FuzzerDriver()``. Multiple unit tests depend also depend on the ``fuzzer::ExternalFunctions*`` global so a ``main()`` function has been added that initializes it before running any tests. Differential Revision: http://reviews.llvm.org/D20943 llvm-svn: 272072
Diffstat (limited to 'llvm/lib/Fuzzer/FuzzerExtFunctions.h')
-rw-r--r--llvm/lib/Fuzzer/FuzzerExtFunctions.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/llvm/lib/Fuzzer/FuzzerExtFunctions.h b/llvm/lib/Fuzzer/FuzzerExtFunctions.h
index 95b5240..2ec86cb 100644
--- a/llvm/lib/Fuzzer/FuzzerExtFunctions.h
+++ b/llvm/lib/Fuzzer/FuzzerExtFunctions.h
@@ -17,8 +17,9 @@
namespace fuzzer {
struct ExternalFunctions {
- // Initialize function pointers. Functions that are not available
- // will be set to nullptr.
+ // Initialize function pointers. Functions that are not available will be set
+ // to nullptr. Do not call this constructor before ``main()`` has been
+ // entered.
ExternalFunctions();
#define EXT_FUNC(NAME, RETURN_TYPE, FUNC_SIG, WARN) \