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gdbserver: set IP_AGENT_EXPORT_FUNC to static when not building IPA, add declarations

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Fixing the -Wmissing-declarations errors in gdbserver's tracepoint.c is
a bit tricky, because some functions are compiled for both gdbserver, in
which case they should be static, since they are only used in that file,
and for libinproctrace.so, in which case they should be externally
visible, since they need to be looked up.  In the case where they are
externally visible, -Wmissing-declarations requires that a declaration
exists (that's the point of the warning).

I've reused the IP_AGENT_EXPORT_FUNC macro to mark the functions as
static when compiled for gdbserver.  Some seemingly unnecessary
declarations are added for when compiling libinproctrace.so (thanks to
Tom for the suggestion).

gdb/gdbserver/ChangeLog:

	* tracepoint.h (IP_AGENT_EXPORT_FUNC) [!IN_PROCESS_AGENT]:
	Define to static.
	* tracepoint.c (stop_tracing, flush_trace_buffer,
	about_to_request_buffer_space, get_trace_state_variable_value,
	set_trace_state_variable_value, gdb_collect): Add declaration.

Change-Id: If9c66151bd00c3b9c5caa27a7c21c5a3a952de2a
This commit is contained in:
Simon Marchi 2020-01-13 14:05:32 -05:00
parent df4a0200dc
commit 6e37c371af
3 changed files with 29 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
gdb/gdbserver/ChangeLog
View File

@ -1,3 +1,11 @@
2020-01-13 Simon Marchi <simon.marchi@efficios.com>
* tracepoint.h (IP_AGENT_EXPORT_FUNC) [!IN_PROCESS_AGENT]:
Define to static.
* tracepoint.c (stop_tracing, flush_trace_buffer,
about_to_request_buffer_space, get_trace_state_variable_value,
set_trace_state_variable_value, gdb_collect): Add declaration.
2020-01-13 Simon Marchi <simon.marchi@efficios.com>
* linux-x86-low.c (x86_linux_regs_info, amd64_emit_eq_goto,

20
gdb/gdbserver/tracepoint.c
View File

@ -370,6 +370,9 @@ read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
# define UNKNOWN_SIDE_EFFECTS() do {} while (0)
#endif
/* This is needed for -Wmissing-declarations. */
IP_AGENT_EXPORT_FUNC void stop_tracing (void);
IP_AGENT_EXPORT_FUNC void
stop_tracing (void)
{
@ -377,6 +380,9 @@ stop_tracing (void)
UNKNOWN_SIDE_EFFECTS();
}
/* This is needed for -Wmissing-declarations. */
IP_AGENT_EXPORT_FUNC void flush_trace_buffer (void);
IP_AGENT_EXPORT_FUNC void
flush_trace_buffer (void)
{
@ -1496,6 +1502,9 @@ init_trace_buffer (LONGEST bufsize)
#ifdef IN_PROCESS_AGENT
/* This is needed for -Wmissing-declarations. */
IP_AGENT_EXPORT_FUNC void about_to_request_buffer_space (void);
IP_AGENT_EXPORT_FUNC void
about_to_request_buffer_space (void)
{
@ -2091,6 +2100,9 @@ create_trace_state_variable (int num, int gdb)
return tsv;
}
/* This is needed for -Wmissing-declarations. */
IP_AGENT_EXPORT_FUNC LONGEST get_trace_state_variable_value (int num);
IP_AGENT_EXPORT_FUNC LONGEST
get_trace_state_variable_value (int num)
{
@ -2117,6 +2129,10 @@ get_trace_state_variable_value (int num)
return tsv->value;
}
/* This is needed for -Wmissing-declarations. */
IP_AGENT_EXPORT_FUNC void set_trace_state_variable_value (int num,
LONGEST val);
IP_AGENT_EXPORT_FUNC void
set_trace_state_variable_value (int num, LONGEST val)
{
@ -5786,6 +5802,10 @@ EXTERN_C_PUSH
IP_AGENT_EXPORT_VAR collecting_t *collecting;
EXTERN_C_POP
/* This is needed for -Wmissing-declarations. */
IP_AGENT_EXPORT_FUNC void gdb_collect (struct tracepoint *tpoint,
unsigned char *regs);
/* This routine, called from the jump pad (in asm) is designed to be
called from the jump pads of fast tracepoints, thus it is on the
critical path. */

2
gdb/gdbserver/tracepoint.h
View File

@ -62,7 +62,7 @@ void initialize_tracepoint (void);
# define IP_AGENT_EXPORT_VAR EXPORTED_SYMBOL ATTR_USED
# define IP_AGENT_EXPORT_VAR_DECL EXTERN_C EXPORTED_SYMBOL
#else
# define IP_AGENT_EXPORT_FUNC
# define IP_AGENT_EXPORT_FUNC static
# define IP_AGENT_EXPORT_VAR
# define IP_AGENT_EXPORT_VAR_DECL extern
#endif