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yaml
---
r: 185908
b: refs/heads/master
c: 161a26b
h: refs/heads/master
v: v3
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Masami Hiramatsu authored and Ingo Molnar committed Feb 25, 2010
1 parent 0c86283 commit ba1a49e
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Showing 3 changed files with 54 additions and 24 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: e92b85e1ffaa0bd8e5d92e7c378a3909e7f23122
refs/heads/master: 161a26b0c231b5d2e60e9c132fa360cd9dac4720
74 changes: 53 additions & 21 deletions trunk/tools/perf/util/probe-finder.c
Original file line number Diff line number Diff line change
Expand Up @@ -161,6 +161,31 @@ static Dwarf_Die *die_get_real_subprogram(Dwarf_Die *cu_die, Dwarf_Addr addr,
return die_mem;
}

/* Similar to dwarf_getfuncs, but returns inlined_subroutine if exists. */
static Dwarf_Die *die_get_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr,
Dwarf_Die *die_mem)
{
Dwarf_Die child_die;
int ret;

ret = dwarf_child(sp_die, die_mem);
if (ret != 0)
return NULL;

do {
if (dwarf_tag(die_mem) == DW_TAG_inlined_subroutine &&
dwarf_haspc(die_mem, addr))
return die_mem;

if (die_get_inlinefunc(die_mem, addr, &child_die)) {
memcpy(die_mem, &child_die, sizeof(Dwarf_Die));
return die_mem;
}
} while (dwarf_siblingof(die_mem, die_mem) == 0);

return NULL;
}

/* Compare diename and tname */
static bool die_compare_name(Dwarf_Die *dw_die, const char *tname)
{
Expand Down Expand Up @@ -534,7 +559,7 @@ static void line_range_add_line(struct line_range *lr, unsigned int line)
}

/* Find line range from its line number */
static void find_line_range_by_line(struct line_finder *lf)
static void find_line_range_by_line(Dwarf_Die *sp_die, struct line_finder *lf)
{
Dwarf_Lines *lines;
Dwarf_Line *line;
Expand All @@ -543,29 +568,36 @@ static void find_line_range_by_line(struct line_finder *lf)
int lineno;
int ret;
const char *src;
Dwarf_Die die_mem;

INIT_LIST_HEAD(&lf->lr->line_list);
ret = dwarf_getsrclines(&lf->cu_die, &lines, &nlines);
DIE_IF(ret != 0);

for (i = 0; i < nlines; i++) {
line = dwarf_onesrcline(lines, i);
dwarf_lineno(line, &lineno);
ret = dwarf_lineno(line, &lineno);
DIE_IF(ret != 0);
if (lf->lno_s > lineno || lf->lno_e < lineno)
continue;

if (sp_die) {
/* Address filtering 1: does sp_die include addr? */
ret = dwarf_lineaddr(line, &addr);
DIE_IF(ret != 0);
if (!dwarf_haspc(sp_die, addr))
continue;

/* Address filtering 2: No child include addr? */
if (die_get_inlinefunc(sp_die, addr, &die_mem))
continue;
}

/* TODO: Get fileno from line, but how? */
src = dwarf_linesrc(line, NULL, NULL);
if (strtailcmp(src, lf->fname) != 0)
continue;

/* Filter line in the function address range */
if (lf->addr_s && lf->addr_e) {
ret = dwarf_lineaddr(line, &addr);
DIE_IF(ret != 0);
if (lf->addr_s > addr || lf->addr_e <= addr)
continue;
}
/* Copy real path */
if (!lf->lr->path)
lf->lr->path = strdup(src);
Expand All @@ -580,24 +612,20 @@ static void find_line_range_by_line(struct line_finder *lf)
}
}

static int line_range_inline_cb(Dwarf_Die *in_die, void *data)
{
find_line_range_by_line(in_die, (struct line_finder *)data);
return DWARF_CB_ABORT; /* No need to find other instances */
}

/* Search function from function name */
static int line_range_search_cb(Dwarf_Die *sp_die, void *data)
{
struct line_finder *lf = (struct line_finder *)data;
struct line_range *lr = lf->lr;
int ret;

if (dwarf_tag(sp_die) == DW_TAG_subprogram &&
die_compare_name(sp_die, lr->function) == 0) {
/* Get the address range of this function */
ret = dwarf_highpc(sp_die, &lf->addr_e);
if (ret == 0)
ret = dwarf_lowpc(sp_die, &lf->addr_s);
if (ret != 0) {
lf->addr_s = 0;
lf->addr_e = 0;
}

lf->fname = dwarf_decl_file(sp_die);
dwarf_decl_line(sp_die, &lr->offset);
pr_debug("fname: %s, lineno:%d\n", lf->fname, lr->offset);
Expand All @@ -608,7 +636,11 @@ static int line_range_search_cb(Dwarf_Die *sp_die, void *data)
lf->lno_e = lr->offset + lr->end;
lr->start = lf->lno_s;
lr->end = lf->lno_e;
find_line_range_by_line(lf);
if (dwarf_func_inline(sp_die))
dwarf_func_inline_instances(sp_die,
line_range_inline_cb, lf);
else
find_line_range_by_line(sp_die, lf);
return 1;
}
return 0;
Expand Down Expand Up @@ -660,7 +692,7 @@ int find_line_range(int fd, struct line_range *lr)
lf.lno_e = INT_MAX;
else
lf.lno_e = lr->end;
find_line_range_by_line(&lf);
find_line_range_by_line(NULL, &lf);
}
}
off = noff;
Expand Down
2 changes: 0 additions & 2 deletions trunk/tools/perf/util/probe-finder.h
Original file line number Diff line number Diff line change
Expand Up @@ -82,8 +82,6 @@ struct line_finder {
const char *fname; /* File name */
int lno_s; /* Start line number */
int lno_e; /* End line number */
Dwarf_Addr addr_s; /* Start address */
Dwarf_Addr addr_e; /* End address */
Dwarf_Die cu_die; /* Current CU */
int found;
};
Expand Down

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