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Add a comment briefly explaining partial symbols

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Based on an explanation by tromey on IRC.

gdb/ChangeLog:

2019-08-05  Christian Biesinger  <cbiesinger@google.com>

	* objfiles.h (objfile): Add a comment describing partial symbols.
This commit is contained in:
Christian Biesinger
2019-07-31 17:10:50 -05:00
parent 276cbbdf99
commit 4ee94178af
2 changed files with 11 additions and 1 deletions
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8
gdb/objfiles.h
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@ -382,7 +382,13 @@ private:
2. Additional symbol files added by the add-symbol-file command,
3. Shared library objfiles, added by ADD_SOLIB, 4. symbol files
for modules that were loaded when GDB attached to a remote system
(see remote-vx.c). */
(see remote-vx.c).
GDB typically reads symbols twice -- first an initial scan which just
reads "partial symbols"; these are partial information for the
static/global symbols in a symbol file. When later looking up symbols,
objfile->sf->qf->lookup_symbol is used to check if we only have a partial
symbol and if so, read and expand the full compunit. */
struct objfile
{