mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-07-27 19:09:50 -04:00
979e87ab1f
A problem with putting bitfields into struct symbol is that other bits in the symbol could be updated concurrently and only one update to the underlying storage unit happen, leading to lost updates. To avoid this, use atomics to atomically read or set part of 16-bits of flags in the symbol. Add accessors to simplify this. The idle value has 3 values in preparation for a later change that will lazily update it. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Honglei Wang <jameshongleiwang@126.com> Cc: Jan Polensky <japo@linux.ibm.com> Cc: Sumanth Korikkar <sumanthk@linux.ibm.com> Cc: Thomas Richter <tmricht@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
137 lines
3.4 KiB
C
137 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <elf.h>
|
|
#include <inttypes.h>
|
|
#include <sys/ttydefaults.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <linux/bitops.h>
|
|
#include "../../util/debug.h"
|
|
#include "../../util/map.h"
|
|
#include "../../util/dso.h"
|
|
#include "../../util/symbol.h"
|
|
#include "../browser.h"
|
|
#include "../helpline.h"
|
|
#include "../keysyms.h"
|
|
#include "map.h"
|
|
|
|
#include <linux/ctype.h>
|
|
|
|
struct map_browser {
|
|
struct ui_browser b;
|
|
struct map *map;
|
|
u8 addrlen;
|
|
};
|
|
|
|
static void map_browser__write(struct ui_browser *browser, void *nd, int row)
|
|
{
|
|
struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
|
|
struct map_browser *mb = container_of(browser, struct map_browser, b);
|
|
bool current_entry = ui_browser__is_current_entry(browser, row);
|
|
int width;
|
|
|
|
ui_browser__set_percent_color(browser, 0, current_entry);
|
|
ui_browser__printf(browser, "%*" PRIx64 " %*" PRIx64 " %c ",
|
|
mb->addrlen, sym->start, mb->addrlen, sym->end,
|
|
symbol__binding(sym) == STB_GLOBAL ? 'g' :
|
|
symbol__binding(sym) == STB_LOCAL ? 'l' : 'w');
|
|
width = browser->width - ((mb->addrlen * 2) + 4);
|
|
if (width > 0)
|
|
ui_browser__write_nstring(browser, sym->name, width);
|
|
}
|
|
|
|
/* FIXME uber-kludgy, see comment on cmd_report... */
|
|
static u32 *symbol__browser_index(struct symbol *browser)
|
|
{
|
|
return ((void *)browser) - sizeof(struct rb_node) - sizeof(u32);
|
|
}
|
|
|
|
static int map_browser__search(struct map_browser *browser)
|
|
{
|
|
char target[512];
|
|
struct symbol *sym;
|
|
int err = ui_browser__input_window("Search by name/addr",
|
|
"Prefix with 0x to search by address",
|
|
target, "ENTER: OK, ESC: Cancel", 0);
|
|
if (err != K_ENTER)
|
|
return -1;
|
|
|
|
if (target[0] == '0' && tolower(target[1]) == 'x') {
|
|
u64 addr = strtoull(target, NULL, 16);
|
|
sym = map__find_symbol(browser->map, addr);
|
|
} else
|
|
sym = map__find_symbol_by_name(browser->map, target);
|
|
|
|
if (sym != NULL) {
|
|
u32 *idx = symbol__browser_index(sym);
|
|
|
|
browser->b.top = &sym->rb_node;
|
|
browser->b.index = browser->b.top_idx = *idx;
|
|
} else
|
|
ui_helpline__fpush("%s not found!", target);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int map_browser__run(struct map_browser *browser)
|
|
{
|
|
int key;
|
|
|
|
if (ui_browser__show(&browser->b, dso__long_name(map__dso(browser->map)),
|
|
"Press ESC to exit, %s / to search",
|
|
verbose > 0 ? "" : "restart with -v to use") < 0)
|
|
return -1;
|
|
|
|
while (1) {
|
|
key = ui_browser__run(&browser->b, 0);
|
|
|
|
switch (key) {
|
|
case '/':
|
|
if (verbose > 0)
|
|
map_browser__search(browser);
|
|
/* fall thru */
|
|
default:
|
|
ui_browser__warn_unhandled_hotkey(&browser->b, key, 0, NULL);
|
|
continue;
|
|
case K_LEFT:
|
|
case K_ESC:
|
|
case 'q':
|
|
case CTRL('c'):
|
|
goto out;
|
|
}
|
|
}
|
|
out:
|
|
ui_browser__hide(&browser->b);
|
|
return key;
|
|
}
|
|
|
|
int map__browse(struct map *map)
|
|
{
|
|
struct map_browser mb = {
|
|
.b = {
|
|
.entries = dso__symbols(map__dso(map)),
|
|
.refresh = ui_browser__rb_tree_refresh,
|
|
.seek = ui_browser__rb_tree_seek,
|
|
.write = map_browser__write,
|
|
},
|
|
.map = map,
|
|
};
|
|
struct rb_node *nd;
|
|
char tmp[BITS_PER_LONG / 4];
|
|
u64 maxaddr = 0;
|
|
|
|
for (nd = rb_first(mb.b.entries); nd; nd = rb_next(nd)) {
|
|
struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
|
|
|
|
if (maxaddr < pos->end)
|
|
maxaddr = pos->end;
|
|
if (verbose > 0) {
|
|
u32 *idx = symbol__browser_index(pos);
|
|
*idx = mb.b.nr_entries;
|
|
}
|
|
++mb.b.nr_entries;
|
|
}
|
|
|
|
mb.addrlen = snprintf(tmp, sizeof(tmp), "%" PRIx64, maxaddr);
|
|
return map_browser__run(&mb);
|
|
}
|