From 2d9da1c89778be1d6604cc1465b0dd50f241a352 Mon Sep 17 00:00:00 2001
From: Iain Sandoe <iain@sandoe.co.uk>
Date: Fri, 13 Aug 2021 20:20:04 +0100
Subject: [PATCH] Darwin: Reset section names table at the end of compile.
For a single use (typical compile) this vector will be reclaimed
as GGC. For JIT this is not sufficient since it does not reset
the pointer to NULL (and thus we think the the vector is already
allocated when a context is reused).
The clears the vector and sets the pointer to NULL at the end
of object output.
Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>
gcc/ChangeLog:
* config/darwin.c (darwin_file_end): Reset and reclaim the
section names table at the end of compile.
---
gcc/config/darwin.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/gcc/config/darwin.c b/gcc/config/darwin.c
index b160c23ea56c..5d1d13c80aaf 100644
--- a/gcc/config/darwin.c
+++ b/gcc/config/darwin.c
@@ -3129,6 +3129,14 @@ darwin_file_end (void)
re-arranging data. */
if (!DARWIN_SECTION_ANCHORS || !flag_section_anchors)
fprintf (asm_out_file, "\t.subsections_via_symbols\n");
+
+ /* We rely on this being NULL at the start of compilation; reset it here
+ so that JIT can reuse a context. */
+ if (dwarf_sect_names_table != NULL)
+ {
+ dwarf_sect_names_table->truncate (0);
+ dwarf_sect_names_table = NULL;
+ }
}
/* TODO: Add a language hook for identifying if a decl is a vtable. */
--
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