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addr2line.c: Support DW_FORM_rnglistx

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This commit is contained in:
Yusuke Endoh 2022-12-22 22:41:10 +09:00
parent 53c82a6ce4
commit 95a1d1fde8
Notes: git 2022-12-22 15:32:54 +00:00 
Merged: https://github.com/ruby/ruby/pull/6993
1 changed files with 19 additions and 6 deletions
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25
addr2line.c
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@ -1521,14 +1521,14 @@ typedef struct {
} ranges_t;
static void
ranges_set(ranges_t *ptr, DebugInfoValue *v)
ranges_set(ranges_t *ptr, DebugInfoValue *v, addr_header_t *addr_header, uint64_t addr_base)
{
uint64_t n = 0;
if (v->type == VAL_uint) {
n = v->as.uint64;
}
else if (v->type == VAL_addr) {
n = 0; // Not implemented yet
n = read_addr(addr_header, addr_base, v->as.addr_idx);
}
switch (v->at) {
case DW_AT_low_pc:
@ -1567,7 +1567,7 @@ read_dw_form_addr(DebugInfoReader *reader, const char **ptr)
}
static uintptr_t
ranges_include(DebugInfoReader *reader, ranges_t *ptr, uint64_t addr)
ranges_include(DebugInfoReader *reader, ranges_t *ptr, uint64_t addr, rnglists_header_t *rnglists_header)
{
if (ptr->high_pc_set) {
if (ptr->ranges_set || !ptr->low_pc_set) {
@ -1583,7 +1583,20 @@ ranges_include(DebugInfoReader *reader, ranges_t *ptr, uint64_t addr)
uint64_t base = ptr->low_pc_set ? ptr->low_pc : reader->current_low_pc;
bool base_valid = true;
if (reader->current_version >= 5) {
p = reader->obj->debug_rnglists.ptr + ptr->ranges;
if (rnglists_header->offset_entry_count == 0) {
// DW_FORM_sec_offset
p = reader->obj->debug_rnglists.ptr + ptr->ranges + reader->current_rnglists_base;
}
else {
// DW_FORM_rnglistx
const char *offset_array = reader->obj->debug_rnglists.ptr + reader->current_rnglists_base;
if (rnglists_header->format == 4) {
p = offset_array + ((uint32_t *)offset_array)[ptr->ranges];
}
else {
p = offset_array + ((uint64_t *)offset_array)[ptr->ranges];
}
}
for (;;) {
uint8_t rle = read_uint8(&p);
uintptr_t from = 0, to = 0;
@ -1859,7 +1872,7 @@ debug_info_read(DebugInfoReader *reader, int num_traces, void **traces,
case DW_AT_low_pc:
case DW_AT_high_pc:
case DW_AT_ranges:
ranges_set(&ranges, &v);
ranges_set(&ranges, &v, &addr_header, reader->current_addr_base);
break;
case DW_AT_declaration:
goto skip_die;
@ -1876,7 +1889,7 @@ debug_info_read(DebugInfoReader *reader, int num_traces, void **traces,
for (int i=offset; i < num_traces; i++) {
uintptr_t addr = (uintptr_t)traces[i];
uintptr_t offset = addr - reader->obj->base_addr + reader->obj->vmaddr;
uintptr_t saddr = ranges_include(reader, &ranges, offset);
uintptr_t saddr = ranges_include(reader, &ranges, offset, &rnglists_header);
if (saddr) {
/* fprintf(stdout, "%d:%tx: %d %lx->%lx %x %s: %s/%s %d %s %s %s\n",__LINE__,die.pos, i,addr,offset, die.tag,line.sname,line.dirname,line.filename,line.line,reader->obj->path,line.sname,lines[i].sname); */
if (lines[i].sname) {