From 9e6d35490a6542f9c97607f93c2ef8ca8e03cbcc Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Wed, 6 Jan 2016 20:12:03 +0000
Subject: Vendor import of lldb trunk r256945:
 https://llvm.org/svn/llvm-project/lldb/trunk@256945

---
 .../test/functionalities/signal/handle-segv/main.c | 58 ++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 packages/Python/lldbsuite/test/functionalities/signal/handle-segv/main.c

(limited to 'packages/Python/lldbsuite/test/functionalities/signal/handle-segv/main.c')

diff --git a/packages/Python/lldbsuite/test/functionalities/signal/handle-segv/main.c b/packages/Python/lldbsuite/test/functionalities/signal/handle-segv/main.c
new file mode 100644
index 000000000000..27d9b8e500ab
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/signal/handle-segv/main.c
@@ -0,0 +1,58 @@
+#include <sys/mman.h>
+#include <signal.h>
+#include <stdio.h>
+#include <unistd.h>
+
+enum {
+    kMmapSize = 0x1000,
+    kMagicValue = 47,
+};
+
+void *address;
+volatile sig_atomic_t signaled = 0;
+
+void handler(int sig)
+{
+    signaled = 1;
+    if (munmap(address, kMmapSize) != 0)
+    {
+        perror("munmap");
+        _exit(5);
+    }
+
+    void* newaddr = mmap(address, kMmapSize, PROT_READ | PROT_WRITE,
+            MAP_ANON | MAP_FIXED | MAP_PRIVATE, -1, 0);
+    if (newaddr != address)
+    {
+        fprintf(stderr, "Newly mmaped address (%p) does not equal old address (%p).\n",
+                newaddr, address);
+        _exit(6);
+    }
+    *(int*)newaddr = kMagicValue;
+}
+
+int main()
+{
+    if (signal(SIGSEGV, handler) == SIG_ERR)
+    {
+        perror("signal");
+        return 1;
+    }
+
+    address = mmap(NULL, kMmapSize, PROT_NONE, MAP_ANON | MAP_PRIVATE, -1, 0);
+    if (address == MAP_FAILED)
+    {
+        perror("mmap");
+        return 2;
+    }
+
+    // This should first trigger a segfault. Our handler will make the memory readable and write
+    // the magic value into memory.
+    if (*(int*)address != kMagicValue)
+        return 3;
+
+    if (! signaled)
+        return 4;
+
+    return 0;
+}
-- 
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