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authorSiddhesh Poyarekar <siddhesh@sourceware.org>2021-07-22 18:38:10 +0530
committerSiddhesh Poyarekar <siddhesh@sourceware.org>2021-07-22 18:38:10 +0530
commit0552fd2c7d4e8a570cb4fe4dfe65e96f6d24b0cd (patch)
treebaf150b3e1b728c6c13b95116241a61bff5f21ab /malloc/Makefile
parentb5bd5bfe88f496463ec9fab680a8edf64d7c2a42 (diff)
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Move malloc_{g,s}et_state to libc_malloc_debug
These deprecated functions are only safe to call from __malloc_initialize_hook and as a result, are not useful in the general case. Move the implementations to libc_malloc_debug so that existing binaries that need it will now have to preload the debug DSO to work correctly. This also allows simplification of the core malloc implementation by dropping all the undumping support code that was added to make malloc_set_state work. One known breakage is that of ancient emacs binaries that depend on this. They will now crash when running with this libc. With LD_BIND_NOW=1, it will terminate immediately because of not being able to find malloc_set_state but with lazy binding it will crash in unpredictable ways. It will need a preloaded libc_malloc_debug.so so that its initialization hook is executed to allow its malloc implementation to work properly. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
Diffstat (limited to 'malloc/Makefile')
-rw-r--r--malloc/Makefile5
1 files changed, 5 insertions, 0 deletions
diff --git a/malloc/Makefile b/malloc/Makefile
index b89af21..96328da 100644
--- a/malloc/Makefile
+++ b/malloc/Makefile
@@ -331,3 +331,8 @@ tst-compathooks-on-malloc-check-ENV = \
LD_PRELOAD=$(objpfx)libc_malloc_debug.so
tst-mallocstate-ENV = LD_PRELOAD=$(objpfx)libc_malloc_debug.so
tst-mallocstate-malloc-check-ENV = LD_PRELOAD=$(objpfx)libc_malloc_debug.so
+
+# The test needs malloc_get_state/malloc_set_state which is in
+# libc_malloc_debug.so.
+$(objpfx)tst-mallocstate: $(objpfx)libc_malloc_debug.so
+$(objpfx)tst-mallocstate-malloc-check: $(objpfx)libc_malloc_debug.so