analyzer: fix ICE on realloc of non-heap [PR104417]

gcc/analyzer/ChangeLog:
	PR analyzer/104417
	* sm-taint.cc (tainted_allocation_size::tainted_allocation_size):
	Remove overzealous assertion.
	(tainted_allocation_size::emit): Likewise.
	(region_model::check_dynamic_size_for_taint): Likewise.

gcc/testsuite/ChangeLog:
	PR analyzer/104417
	* gcc.dg/analyzer/pr104417.c: New test.

Signed-off-by: David Malcolm <dmalcolm@redhat.com>

diff --git a/gcc/analyzer/sm-taint.cc b/gcc/analyzer/sm-taint.cc
index 573a912..57a0ac6 100644 (file)
--- a/gcc/analyzer/sm-taint.cc
+++ b/gcc/analyzer/sm-taint.cc
@@ -496,9 +496,6 @@ public:
   : taint_diagnostic (sm, arg, has_bounds),
     m_mem_space (mem_space)
   {
-    gcc_assert (mem_space == MEMSPACE_STACK
-               || mem_space == MEMSPACE_HEAP
-               || mem_space == MEMSPACE_UNKNOWN);
   }
 
   const char *get_kind () const FINAL OVERRIDE
@@ -511,9 +508,6 @@ public:
     diagnostic_metadata m;
     /* "CWE-789: Memory Allocation with Excessive Size Value".  */
     m.add_cwe (789);
-    gcc_assert (m_mem_space == MEMSPACE_STACK
-               || m_mem_space == MEMSPACE_HEAP
-               || m_mem_space == MEMSPACE_UNKNOWN);
     // TODO: make use of m_mem_space
     if (m_arg)
       switch (m_has_bounds)
@@ -1055,9 +1049,6 @@ region_model::check_dynamic_size_for_taint (enum memory_space mem_space,
                                            const svalue *size_in_bytes,
                                            region_model_context *ctxt) const
 {
-  gcc_assert (mem_space == MEMSPACE_STACK
-             || mem_space == MEMSPACE_HEAP
-             || mem_space == MEMSPACE_UNKNOWN);
   gcc_assert (size_in_bytes);
   gcc_assert (ctxt);
 

diff --git a/gcc/testsuite/gcc.dg/analyzer/pr104417.c b/gcc/testsuite/gcc.dg/analyzer/pr104417.c
new file mode 100644 (file)
index 0000000..41ea5db
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/analyzer/pr104417.c
@@ -0,0 +1,7 @@
+char eparr[1];
+
+void *
+warn_realloc_extern_ptrarr_offset (int i, int n)
+{
+  return __builtin_realloc (eparr + i, n); /* { dg-warning "'__builtin_realloc' called on unallocated object 'eparr'" } */
+}