std.GeneralPurposeAllocator: print leaked memory addresses

This helps when using it with other tools, such as memory watchpoints.

1 files changed, 7 insertions, 2 deletions

diff --git a/lib/std/heap/general_purpose_allocator.zig b/lib/std/heap/general_purpose_allocator.zig
index c731f22d66..c69b2799e1 100644
--- a/lib/std/heap/general_purpose_allocator.zig
+++ b/lib/std/heap/general_purpose_allocator.zig
@@ -317,7 +317,10 @@ pub fn GeneralPurposeAllocator(comptime config: Config) type {
                         if (is_used) {
                             const slot_index = @intCast(SlotIndex, used_bits_byte * 8 + bit_index);
                             const stack_trace = bucketStackTrace(bucket, size_class, slot_index, .alloc);
-                            log.err("Memory leak detected: {s}", .{stack_trace});
+                            const addr = bucket.page + slot_index * size_class;
+                            log.err("memory address 0x{x} leaked: {s}", .{
+                                @ptrToInt(addr), stack_trace,
+                            });
                             leaks = true;
                         }
                         if (bit_index == math.maxInt(u3))
@@ -345,7 +348,9 @@ pub fn GeneralPurposeAllocator(comptime config: Config) type {
             }
             var it = self.large_allocations.iterator();
             while (it.next()) |large_alloc| {
-                log.err("Memory leak detected: {s}", .{large_alloc.value.getStackTrace()});
+                log.err("memory address 0x{x} leaked: {s}", .{
+                    @ptrToInt(large_alloc.value.bytes.ptr), large_alloc.value.getStackTrace(),
+                });
                 leaks = true;
             }
             return leaks;