From: Kevin Buettner <kevinb@redhat.com>
To: gdb-patches@sourceware.org
Subject: [PATCH 6/8] Use BLOCK_ENTRY_PC to find function entry pc in infrun.c
Date: Tue, 26 Jun 2018 06:53:00 -0000 [thread overview]
Message-ID: <20180625235326.2aa421f2@pinnacle.lan> (raw)
In-Reply-To: <20180625233239.49dc52ea@pinnacle.lan>
find_pc_partial_function() still returns the lowest and highest address
of a function even when that function contains non-contiguous ranges.
In cases where greater discrimination is required, the BLOCK parameter
may be examined to determine the actual entry PC.
This patch uses the BLOCK return value from find_pc_partial_function()
to obtain the entry PC. If no block is found - which can happen when
only minimal symbols are available - then the start address provided
by find_pc_partial_function() will still be used (as before).
gdb/ChangeLog:
* infrun.c (fill_in_stop_func): Use BLOCK_ENTRY_PC to
determine stop_func_start in the execution control state.
---
gdb/infrun.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/gdb/infrun.c b/gdb/infrun.c
index f455af2..88d8fdc 100644
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -4297,10 +4297,20 @@ fill_in_stop_func (struct gdbarch *gdbarch,
{
if (!ecs->stop_func_filled_in)
{
+ const struct block *block;
+
/* Don't care about return value; stop_func_start and stop_func_name
will both be 0 if it doesn't work. */
find_pc_partial_function (stop_pc, &ecs->stop_func_name,
- &ecs->stop_func_start, &ecs->stop_func_end);
+ &ecs->stop_func_start, &ecs->stop_func_end,
+ &block);
+
+ /* If a block is returned, prefer the block's entry point instead of
+ the lowest address of the block - these aren't necessarily the
+ same. */
+ if (block)
+ ecs->stop_func_start = BLOCK_ENTRY_PC (block);
+
ecs->stop_func_start
+= gdbarch_deprecated_function_start_offset (gdbarch);
next prev parent reply other threads:[~2018-06-26 6:53 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-26 6:32 [PATCH 0/8] Non-contiguous address range support Kevin Buettner
2018-06-26 6:42 ` [PATCH 1/8] Add block range data structure for blocks with non-contiguous address ranges Kevin Buettner
2018-08-01 1:36 ` Simon Marchi
2018-08-01 23:57 ` Kevin Buettner
2018-08-01 1:40 ` Simon Marchi
2018-06-26 6:44 ` [PATCH 2/8] Record explicit block ranges from dwarf2read.c Kevin Buettner
2018-08-01 1:41 ` Simon Marchi
2018-06-26 6:47 ` [PATCH 3/8] Add support for non-contiguous blocks to find_pc_partial_function Kevin Buettner
2018-07-19 18:52 ` Kevin Buettner
2018-08-01 2:01 ` Simon Marchi
2018-08-01 23:40 ` Kevin Buettner
2018-06-26 6:49 ` [PATCH 4/8] Disassemble blocks with non-contiguous ranges Kevin Buettner
2018-08-01 2:08 ` Simon Marchi
2018-06-26 6:51 ` [PATCH 5/8] Use BLOCK_ENTRY_PC in place of most uses of BLOCK_START Kevin Buettner
2018-08-01 2:22 ` Simon Marchi
2018-08-02 0:07 ` Kevin Buettner
2018-06-26 6:53 ` Kevin Buettner [this message]
2018-08-01 2:28 ` [PATCH 6/8] Use BLOCK_ENTRY_PC to find function entry pc in infrun.c Simon Marchi
2018-06-26 6:55 ` [PATCH 7/8] Relocate block range start and end addresses Kevin Buettner
2018-08-01 2:30 ` Simon Marchi
2018-06-26 6:57 ` [PATCH 8/8] Test case for functions with non-contiguous ranges Kevin Buettner
2018-08-01 2:56 ` Simon Marchi
2018-07-11 15:27 ` [PATCH 0/8] Non-contiguous address range support Kevin Buettner
2018-07-11 15:32 ` Keith Seitz
2018-07-12 19:12 ` Simon Marchi
2018-07-17 2:00 ` Kevin Buettner
2018-07-19 15:55 ` Simon Marchi
2018-07-19 19:07 ` Kevin Buettner
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