Only use argv[0] as the main executable name if it exists.
Under some environments, argv[0] doesn't hold a valid file name, but
sys::fs::getMainExecutable will find the main executable properly.
This patch tweaks the logic to fall back to sys::fs::getMainExecutable
in more situations.
Differential Revision: https://reviews.llvm.org/D60730
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358455 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Signals.cpp b/lib/Support/Signals.cpp
index 570b18f..173a07f 100644
--- a/lib/Support/Signals.cpp
+++ b/lib/Support/Signals.cpp
@@ -131,8 +131,8 @@
// If we don't know argv0 or the address of main() at this point, try
// to guess it anyway (it's possible on some platforms).
std::string MainExecutableName =
- Argv0.empty() ? sys::fs::getMainExecutable(nullptr, nullptr)
- : (std::string)Argv0;
+ sys::fs::exists(Argv0) ? (std::string)Argv0
+ : sys::fs::getMainExecutable(nullptr, nullptr);
BumpPtrAllocator Allocator;
StringSaver StrPool(Allocator);
std::vector<const char *> Modules(Depth, nullptr);
