The length in the .debug_addr unit header was calculated using the number of elements in the addr_index_table. This is wrong because the entries in the table are refcounted and only those with a refcount > 0 are actually put in the index. Add a helper function count_index_addrs to get the correct number of addresses in the index.
gcc/ChangeLog: * dwarf2out.c (count_index_addrs): New function. (dwarf2out_finish): Use count_index_addrs to calculate addrs_length. diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c index 9c1d7c4..c05bfe4 100644 --- a/gcc/dwarf2out.c +++ b/gcc/dwarf2out.c @@ -28898,6 +28898,19 @@ output_addr_table_entry (addr_table_entry **slot, unsigned int *cur_index) return 1; } +/* A helper function for dwarf2out_finish. Counts the number + of indexed addresses. Must match the logic of the functions + output_addr_table_entry above. */ +int +count_index_addrs (addr_table_entry **slot, unsigned int *last_idx) +{ + addr_table_entry *entry = *slot; + + if (entry->refcount > 0) + *last_idx += 1; + return 1; +} + /* Produce the .debug_addr section. */ static void @@ -31393,8 +31406,12 @@ dwarf2out_finish (const char *) DWARF5 specifies a small header when address tables are used. */ if (dwarf_version >= 5) { - unsigned long addrs_length - = addr_index_table->elements () * DWARF2_ADDR_SIZE + 4; + unsigned int last_idx = 0; + unsigned long addrs_length; + + addr_index_table->traverse_noresize + <unsigned int *, count_index_addrs> (&last_idx); + addrs_length = last_idx * DWARF2_ADDR_SIZE + 4; if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4) dw2_asm_output_data (4, 0xffffffff,