From 07e7f39ffd43349e4e64f77c45199d865b6e7cff Mon Sep 17 00:00:00 2001 From: Jan Kratochvil Date: Mon, 22 Jun 2009 19:50:10 +0000 Subject: [PATCH] gdb/ PR gdb/9988: * buildsym.c (block_compar): New function. (end_symtab): Replace the bubble sort by a qsort based code. --- gdb/ChangeLog | 8 +++++++- gdb/buildsym.c | 55 +++++++++++++++++++++++++++++--------------------- 2 files changed, 39 insertions(+), 24 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 2067980bb42..ecb49bb6049 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,4 +1,10 @@ -2009-05-07 Sami Wagiaalla +2009-06-22 Jan Kratochvil + + PR gdb/9988: + * buildsym.c (block_compar): New function. + (end_symtab): Replace the bubble sort by a qsort based code. + +2009-06-22 Sami Wagiaalla * MAINTAINERS (Write After Approval): Add self. diff --git a/gdb/buildsym.c b/gdb/buildsym.c index e7c48fed4a2..f94c14dc551 100644 --- a/gdb/buildsym.c +++ b/gdb/buildsym.c @@ -899,6 +899,19 @@ watch_main_source_file_lossage (void) } } +/* Helper function for qsort. Parametes are `struct block *' pointers, + function sorts them in descending order by their BLOCK_START. */ + +static int +block_compar (const void *ap, const void *bp) +{ + const struct block *a = *(const struct block **) ap; + const struct block *b = *(const struct block **) bp; + + return ((BLOCK_START (b) > BLOCK_START (a)) + - (BLOCK_START (b) < BLOCK_START (a))); +} + /* Finish the symbol definitions for one main source file, close off all the lexical contexts for that file (creating struct block's for them), then make the struct symtab for that file and put it in the @@ -952,32 +965,28 @@ end_symtab (CORE_ADDR end_addr, struct objfile *objfile, int section) OBJF_REORDERED is true, then sort the pending blocks. */ if ((objfile->flags & OBJF_REORDERED) && pending_blocks) { - /* FIXME! Remove this horrid bubble sort and use merge sort!!! */ - int swapped; - do - { - struct pending_block *pb, *pbnext; + unsigned count = 0; + struct pending_block *pb; + struct block **barray, **bp; + struct cleanup *back_to; - pb = pending_blocks; - pbnext = pb->next; - swapped = 0; + for (pb = pending_blocks; pb != NULL; pb = pb->next) + count++; - while (pbnext) - { - /* swap blocks if unordered! */ + barray = xmalloc (sizeof (*barray) * count); + back_to = make_cleanup (xfree, barray); - if (BLOCK_START (pb->block) < BLOCK_START (pbnext->block)) - { - struct block *tmp = pb->block; - pb->block = pbnext->block; - pbnext->block = tmp; - swapped = 1; - } - pb = pbnext; - pbnext = pbnext->next; - } - } - while (swapped); + bp = barray; + for (pb = pending_blocks; pb != NULL; pb = pb->next) + *bp++ = pb->block; + + qsort (barray, count, sizeof (*barray), block_compar); + + bp = barray; + for (pb = pending_blocks; pb != NULL; pb = pb->next) + pb->block = *bp++; + + do_cleanups (back_to); } /* Cleanup any undefined types that have been left hanging around -- 2.30.2