mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 17:38:56 +07:00
d2396999c9
If a stripped binary is placed in the cache, the user is in a situation where there's a cached elf file present, but it doesn't have any symtab to use for name resolution. Grab the debuginfo for binaries that don't end in .ko. This yields a better chance of resolving symbols from older traces. Signed-off-by: Krister Johansen <kjlx@templeofstupid.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas-Mich Richter <tmricht@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/1499305693-1599-7-git-send-email-kjlx@templeofstupid.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1526 lines
34 KiB
C
1526 lines
34 KiB
C
#include <asm/bug.h>
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#include <linux/kernel.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <errno.h>
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#include "compress.h"
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#include "path.h"
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#include "symbol.h"
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#include "dso.h"
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#include "machine.h"
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#include "auxtrace.h"
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#include "util.h"
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#include "debug.h"
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#include "string2.h"
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#include "vdso.h"
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static const char * const debuglink_paths[] = {
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"%.0s%s",
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"%s/%s",
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"%s/.debug/%s",
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"/usr/lib/debug%s/%s"
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};
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char dso__symtab_origin(const struct dso *dso)
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{
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static const char origin[] = {
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[DSO_BINARY_TYPE__KALLSYMS] = 'k',
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[DSO_BINARY_TYPE__VMLINUX] = 'v',
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[DSO_BINARY_TYPE__JAVA_JIT] = 'j',
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[DSO_BINARY_TYPE__DEBUGLINK] = 'l',
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[DSO_BINARY_TYPE__BUILD_ID_CACHE] = 'B',
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[DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO] = 'D',
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[DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f',
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[DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u',
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[DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO] = 'o',
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[DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b',
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[DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd',
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[DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE] = 'K',
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[DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP] = 'm',
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[DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g',
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[DSO_BINARY_TYPE__GUEST_KMODULE] = 'G',
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[DSO_BINARY_TYPE__GUEST_KMODULE_COMP] = 'M',
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[DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V',
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};
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if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND)
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return '!';
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return origin[dso->symtab_type];
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}
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int dso__read_binary_type_filename(const struct dso *dso,
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enum dso_binary_type type,
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char *root_dir, char *filename, size_t size)
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{
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char build_id_hex[SBUILD_ID_SIZE];
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int ret = 0;
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size_t len;
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switch (type) {
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case DSO_BINARY_TYPE__DEBUGLINK:
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{
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const char *last_slash;
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char dso_dir[PATH_MAX];
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char symfile[PATH_MAX];
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unsigned int i;
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len = __symbol__join_symfs(filename, size, dso->long_name);
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last_slash = filename + len;
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while (last_slash != filename && *last_slash != '/')
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last_slash--;
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strncpy(dso_dir, filename, last_slash - filename);
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dso_dir[last_slash-filename] = '\0';
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if (!is_regular_file(filename)) {
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ret = -1;
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break;
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}
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ret = filename__read_debuglink(filename, symfile, PATH_MAX);
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if (ret)
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break;
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/* Check predefined locations where debug file might reside */
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ret = -1;
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for (i = 0; i < ARRAY_SIZE(debuglink_paths); i++) {
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snprintf(filename, size,
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debuglink_paths[i], dso_dir, symfile);
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if (is_regular_file(filename)) {
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ret = 0;
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break;
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}
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}
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break;
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}
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case DSO_BINARY_TYPE__BUILD_ID_CACHE:
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if (dso__build_id_filename(dso, filename, size, false) == NULL)
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ret = -1;
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break;
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case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO:
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if (dso__build_id_filename(dso, filename, size, true) == NULL)
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ret = -1;
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break;
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case DSO_BINARY_TYPE__FEDORA_DEBUGINFO:
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len = __symbol__join_symfs(filename, size, "/usr/lib/debug");
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snprintf(filename + len, size - len, "%s.debug", dso->long_name);
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break;
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case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO:
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len = __symbol__join_symfs(filename, size, "/usr/lib/debug");
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snprintf(filename + len, size - len, "%s", dso->long_name);
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break;
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case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO:
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{
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const char *last_slash;
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size_t dir_size;
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last_slash = dso->long_name + dso->long_name_len;
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while (last_slash != dso->long_name && *last_slash != '/')
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last_slash--;
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len = __symbol__join_symfs(filename, size, "");
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dir_size = last_slash - dso->long_name + 2;
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if (dir_size > (size - len)) {
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ret = -1;
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break;
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}
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len += scnprintf(filename + len, dir_size, "%s", dso->long_name);
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len += scnprintf(filename + len , size - len, ".debug%s",
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last_slash);
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break;
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}
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case DSO_BINARY_TYPE__BUILDID_DEBUGINFO:
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if (!dso->has_build_id) {
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ret = -1;
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break;
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}
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build_id__sprintf(dso->build_id,
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sizeof(dso->build_id),
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build_id_hex);
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len = __symbol__join_symfs(filename, size, "/usr/lib/debug/.build-id/");
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snprintf(filename + len, size - len, "%.2s/%s.debug",
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build_id_hex, build_id_hex + 2);
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break;
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case DSO_BINARY_TYPE__VMLINUX:
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case DSO_BINARY_TYPE__GUEST_VMLINUX:
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case DSO_BINARY_TYPE__SYSTEM_PATH_DSO:
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__symbol__join_symfs(filename, size, dso->long_name);
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break;
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case DSO_BINARY_TYPE__GUEST_KMODULE:
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case DSO_BINARY_TYPE__GUEST_KMODULE_COMP:
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path__join3(filename, size, symbol_conf.symfs,
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root_dir, dso->long_name);
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break;
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case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE:
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case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP:
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__symbol__join_symfs(filename, size, dso->long_name);
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break;
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case DSO_BINARY_TYPE__KCORE:
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case DSO_BINARY_TYPE__GUEST_KCORE:
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snprintf(filename, size, "%s", dso->long_name);
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break;
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default:
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case DSO_BINARY_TYPE__KALLSYMS:
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case DSO_BINARY_TYPE__GUEST_KALLSYMS:
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case DSO_BINARY_TYPE__JAVA_JIT:
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case DSO_BINARY_TYPE__NOT_FOUND:
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ret = -1;
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break;
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}
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return ret;
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}
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static const struct {
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const char *fmt;
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int (*decompress)(const char *input, int output);
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} compressions[] = {
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#ifdef HAVE_ZLIB_SUPPORT
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{ "gz", gzip_decompress_to_file },
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#endif
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#ifdef HAVE_LZMA_SUPPORT
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{ "xz", lzma_decompress_to_file },
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#endif
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{ NULL, NULL },
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};
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bool is_supported_compression(const char *ext)
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{
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unsigned i;
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for (i = 0; compressions[i].fmt; i++) {
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if (!strcmp(ext, compressions[i].fmt))
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return true;
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}
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return false;
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}
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bool is_kernel_module(const char *pathname, int cpumode)
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{
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struct kmod_path m;
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int mode = cpumode & PERF_RECORD_MISC_CPUMODE_MASK;
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WARN_ONCE(mode != cpumode,
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"Internal error: passing unmasked cpumode (%x) to is_kernel_module",
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cpumode);
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switch (mode) {
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case PERF_RECORD_MISC_USER:
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case PERF_RECORD_MISC_HYPERVISOR:
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case PERF_RECORD_MISC_GUEST_USER:
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return false;
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/* Treat PERF_RECORD_MISC_CPUMODE_UNKNOWN as kernel */
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default:
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if (kmod_path__parse(&m, pathname)) {
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pr_err("Failed to check whether %s is a kernel module or not. Assume it is.",
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pathname);
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return true;
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}
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}
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return m.kmod;
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}
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bool decompress_to_file(const char *ext, const char *filename, int output_fd)
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{
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unsigned i;
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for (i = 0; compressions[i].fmt; i++) {
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if (!strcmp(ext, compressions[i].fmt))
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return !compressions[i].decompress(filename,
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output_fd);
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}
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return false;
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}
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bool dso__needs_decompress(struct dso *dso)
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{
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return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP ||
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dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP;
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}
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static int decompress_kmodule(struct dso *dso, const char *name, char *tmpbuf)
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{
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int fd = -1;
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struct kmod_path m;
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if (!dso__needs_decompress(dso))
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return -1;
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if (kmod_path__parse_ext(&m, dso->long_name))
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return -1;
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if (!m.comp)
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goto out;
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fd = mkstemp(tmpbuf);
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if (fd < 0) {
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dso->load_errno = errno;
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goto out;
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}
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if (!decompress_to_file(m.ext, name, fd)) {
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dso->load_errno = DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE;
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close(fd);
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fd = -1;
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}
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out:
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free(m.ext);
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return fd;
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}
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int dso__decompress_kmodule_fd(struct dso *dso, const char *name)
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{
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char tmpbuf[] = KMOD_DECOMP_NAME;
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int fd;
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fd = decompress_kmodule(dso, name, tmpbuf);
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unlink(tmpbuf);
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return fd;
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}
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int dso__decompress_kmodule_path(struct dso *dso, const char *name,
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char *pathname, size_t len)
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{
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char tmpbuf[] = KMOD_DECOMP_NAME;
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int fd;
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fd = decompress_kmodule(dso, name, tmpbuf);
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if (fd < 0) {
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unlink(tmpbuf);
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return -1;
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}
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strncpy(pathname, tmpbuf, len);
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close(fd);
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return 0;
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}
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/*
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* Parses kernel module specified in @path and updates
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* @m argument like:
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*
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* @comp - true if @path contains supported compression suffix,
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* false otherwise
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* @kmod - true if @path contains '.ko' suffix in right position,
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* false otherwise
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* @name - if (@alloc_name && @kmod) is true, it contains strdup-ed base name
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* of the kernel module without suffixes, otherwise strudup-ed
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* base name of @path
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* @ext - if (@alloc_ext && @comp) is true, it contains strdup-ed string
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* the compression suffix
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*
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* Returns 0 if there's no strdup error, -ENOMEM otherwise.
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*/
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int __kmod_path__parse(struct kmod_path *m, const char *path,
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bool alloc_name, bool alloc_ext)
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{
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const char *name = strrchr(path, '/');
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const char *ext = strrchr(path, '.');
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bool is_simple_name = false;
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memset(m, 0x0, sizeof(*m));
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name = name ? name + 1 : path;
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/*
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* '.' is also a valid character for module name. For example:
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* [aaa.bbb] is a valid module name. '[' should have higher
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* priority than '.ko' suffix.
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*
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* The kernel names are from machine__mmap_name. Such
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* name should belong to kernel itself, not kernel module.
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*/
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if (name[0] == '[') {
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is_simple_name = true;
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if ((strncmp(name, "[kernel.kallsyms]", 17) == 0) ||
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(strncmp(name, "[guest.kernel.kallsyms", 22) == 0) ||
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(strncmp(name, "[vdso]", 6) == 0) ||
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(strncmp(name, "[vsyscall]", 10) == 0)) {
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m->kmod = false;
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} else
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m->kmod = true;
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}
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/* No extension, just return name. */
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if ((ext == NULL) || is_simple_name) {
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if (alloc_name) {
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m->name = strdup(name);
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return m->name ? 0 : -ENOMEM;
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}
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return 0;
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}
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if (is_supported_compression(ext + 1)) {
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m->comp = true;
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ext -= 3;
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}
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/* Check .ko extension only if there's enough name left. */
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if (ext > name)
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m->kmod = !strncmp(ext, ".ko", 3);
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if (alloc_name) {
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if (m->kmod) {
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if (asprintf(&m->name, "[%.*s]", (int) (ext - name), name) == -1)
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return -ENOMEM;
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} else {
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if (asprintf(&m->name, "%s", name) == -1)
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return -ENOMEM;
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}
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strxfrchar(m->name, '-', '_');
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}
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if (alloc_ext && m->comp) {
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m->ext = strdup(ext + 4);
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if (!m->ext) {
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free((void *) m->name);
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return -ENOMEM;
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}
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}
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return 0;
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}
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void dso__set_module_info(struct dso *dso, struct kmod_path *m,
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struct machine *machine)
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{
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if (machine__is_host(machine))
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dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE;
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else
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dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE;
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/* _KMODULE_COMP should be next to _KMODULE */
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if (m->kmod && m->comp)
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dso->symtab_type++;
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dso__set_short_name(dso, strdup(m->name), true);
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}
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|
|
/*
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* Global list of open DSOs and the counter.
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*/
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static LIST_HEAD(dso__data_open);
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static long dso__data_open_cnt;
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static pthread_mutex_t dso__data_open_lock = PTHREAD_MUTEX_INITIALIZER;
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|
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static void dso__list_add(struct dso *dso)
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|
{
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list_add_tail(&dso->data.open_entry, &dso__data_open);
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dso__data_open_cnt++;
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}
|
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|
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static void dso__list_del(struct dso *dso)
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|
{
|
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list_del(&dso->data.open_entry);
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WARN_ONCE(dso__data_open_cnt <= 0,
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"DSO data fd counter out of bounds.");
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dso__data_open_cnt--;
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}
|
|
|
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static void close_first_dso(void);
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|
|
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static int do_open(char *name)
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|
{
|
|
int fd;
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char sbuf[STRERR_BUFSIZE];
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|
|
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do {
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fd = open(name, O_RDONLY);
|
|
if (fd >= 0)
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return fd;
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|
|
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pr_debug("dso open failed: %s\n",
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str_error_r(errno, sbuf, sizeof(sbuf)));
|
|
if (!dso__data_open_cnt || errno != EMFILE)
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break;
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|
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close_first_dso();
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} while (1);
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|
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return -1;
|
|
}
|
|
|
|
static int __open_dso(struct dso *dso, struct machine *machine)
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|
{
|
|
int fd = -EINVAL;
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|
char *root_dir = (char *)"";
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|
char *name = malloc(PATH_MAX);
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|
|
|
if (!name)
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|
return -ENOMEM;
|
|
|
|
if (machine)
|
|
root_dir = machine->root_dir;
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|
|
|
if (dso__read_binary_type_filename(dso, dso->binary_type,
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|
root_dir, name, PATH_MAX))
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|
goto out;
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|
|
|
if (!is_regular_file(name))
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|
goto out;
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|
|
|
if (dso__needs_decompress(dso)) {
|
|
char newpath[KMOD_DECOMP_LEN];
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size_t len = sizeof(newpath);
|
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|
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if (dso__decompress_kmodule_path(dso, name, newpath, len) < 0) {
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fd = -dso->load_errno;
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goto out;
|
|
}
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|
|
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strcpy(name, newpath);
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|
}
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|
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fd = do_open(name);
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|
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if (dso__needs_decompress(dso))
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unlink(name);
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|
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out:
|
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free(name);
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return fd;
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}
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|
|
static void check_data_close(void);
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|
|
|
/**
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|
* dso_close - Open DSO data file
|
|
* @dso: dso object
|
|
*
|
|
* Open @dso's data file descriptor and updates
|
|
* list/count of open DSO objects.
|
|
*/
|
|
static int open_dso(struct dso *dso, struct machine *machine)
|
|
{
|
|
int fd;
|
|
struct nscookie nsc;
|
|
|
|
if (dso->binary_type != DSO_BINARY_TYPE__BUILD_ID_CACHE)
|
|
nsinfo__mountns_enter(dso->nsinfo, &nsc);
|
|
fd = __open_dso(dso, machine);
|
|
if (dso->binary_type != DSO_BINARY_TYPE__BUILD_ID_CACHE)
|
|
nsinfo__mountns_exit(&nsc);
|
|
|
|
if (fd >= 0) {
|
|
dso__list_add(dso);
|
|
/*
|
|
* Check if we crossed the allowed number
|
|
* of opened DSOs and close one if needed.
|
|
*/
|
|
check_data_close();
|
|
}
|
|
|
|
return fd;
|
|
}
|
|
|
|
static void close_data_fd(struct dso *dso)
|
|
{
|
|
if (dso->data.fd >= 0) {
|
|
close(dso->data.fd);
|
|
dso->data.fd = -1;
|
|
dso->data.file_size = 0;
|
|
dso__list_del(dso);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* dso_close - Close DSO data file
|
|
* @dso: dso object
|
|
*
|
|
* Close @dso's data file descriptor and updates
|
|
* list/count of open DSO objects.
|
|
*/
|
|
static void close_dso(struct dso *dso)
|
|
{
|
|
close_data_fd(dso);
|
|
}
|
|
|
|
static void close_first_dso(void)
|
|
{
|
|
struct dso *dso;
|
|
|
|
dso = list_first_entry(&dso__data_open, struct dso, data.open_entry);
|
|
close_dso(dso);
|
|
}
|
|
|
|
static rlim_t get_fd_limit(void)
|
|
{
|
|
struct rlimit l;
|
|
rlim_t limit = 0;
|
|
|
|
/* Allow half of the current open fd limit. */
|
|
if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
|
|
if (l.rlim_cur == RLIM_INFINITY)
|
|
limit = l.rlim_cur;
|
|
else
|
|
limit = l.rlim_cur / 2;
|
|
} else {
|
|
pr_err("failed to get fd limit\n");
|
|
limit = 1;
|
|
}
|
|
|
|
return limit;
|
|
}
|
|
|
|
static rlim_t fd_limit;
|
|
|
|
/*
|
|
* Used only by tests/dso-data.c to reset the environment
|
|
* for tests. I dont expect we should change this during
|
|
* standard runtime.
|
|
*/
|
|
void reset_fd_limit(void)
|
|
{
|
|
fd_limit = 0;
|
|
}
|
|
|
|
static bool may_cache_fd(void)
|
|
{
|
|
if (!fd_limit)
|
|
fd_limit = get_fd_limit();
|
|
|
|
if (fd_limit == RLIM_INFINITY)
|
|
return true;
|
|
|
|
return fd_limit > (rlim_t) dso__data_open_cnt;
|
|
}
|
|
|
|
/*
|
|
* Check and close LRU dso if we crossed allowed limit
|
|
* for opened dso file descriptors. The limit is half
|
|
* of the RLIMIT_NOFILE files opened.
|
|
*/
|
|
static void check_data_close(void)
|
|
{
|
|
bool cache_fd = may_cache_fd();
|
|
|
|
if (!cache_fd)
|
|
close_first_dso();
|
|
}
|
|
|
|
/**
|
|
* dso__data_close - Close DSO data file
|
|
* @dso: dso object
|
|
*
|
|
* External interface to close @dso's data file descriptor.
|
|
*/
|
|
void dso__data_close(struct dso *dso)
|
|
{
|
|
pthread_mutex_lock(&dso__data_open_lock);
|
|
close_dso(dso);
|
|
pthread_mutex_unlock(&dso__data_open_lock);
|
|
}
|
|
|
|
static void try_to_open_dso(struct dso *dso, struct machine *machine)
|
|
{
|
|
enum dso_binary_type binary_type_data[] = {
|
|
DSO_BINARY_TYPE__BUILD_ID_CACHE,
|
|
DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
|
|
DSO_BINARY_TYPE__NOT_FOUND,
|
|
};
|
|
int i = 0;
|
|
|
|
if (dso->data.fd >= 0)
|
|
return;
|
|
|
|
if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) {
|
|
dso->data.fd = open_dso(dso, machine);
|
|
goto out;
|
|
}
|
|
|
|
do {
|
|
dso->binary_type = binary_type_data[i++];
|
|
|
|
dso->data.fd = open_dso(dso, machine);
|
|
if (dso->data.fd >= 0)
|
|
goto out;
|
|
|
|
} while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND);
|
|
out:
|
|
if (dso->data.fd >= 0)
|
|
dso->data.status = DSO_DATA_STATUS_OK;
|
|
else
|
|
dso->data.status = DSO_DATA_STATUS_ERROR;
|
|
}
|
|
|
|
/**
|
|
* dso__data_get_fd - Get dso's data file descriptor
|
|
* @dso: dso object
|
|
* @machine: machine object
|
|
*
|
|
* External interface to find dso's file, open it and
|
|
* returns file descriptor. It should be paired with
|
|
* dso__data_put_fd() if it returns non-negative value.
|
|
*/
|
|
int dso__data_get_fd(struct dso *dso, struct machine *machine)
|
|
{
|
|
if (dso->data.status == DSO_DATA_STATUS_ERROR)
|
|
return -1;
|
|
|
|
if (pthread_mutex_lock(&dso__data_open_lock) < 0)
|
|
return -1;
|
|
|
|
try_to_open_dso(dso, machine);
|
|
|
|
if (dso->data.fd < 0)
|
|
pthread_mutex_unlock(&dso__data_open_lock);
|
|
|
|
return dso->data.fd;
|
|
}
|
|
|
|
void dso__data_put_fd(struct dso *dso __maybe_unused)
|
|
{
|
|
pthread_mutex_unlock(&dso__data_open_lock);
|
|
}
|
|
|
|
bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by)
|
|
{
|
|
u32 flag = 1 << by;
|
|
|
|
if (dso->data.status_seen & flag)
|
|
return true;
|
|
|
|
dso->data.status_seen |= flag;
|
|
|
|
return false;
|
|
}
|
|
|
|
static void
|
|
dso_cache__free(struct dso *dso)
|
|
{
|
|
struct rb_root *root = &dso->data.cache;
|
|
struct rb_node *next = rb_first(root);
|
|
|
|
pthread_mutex_lock(&dso->lock);
|
|
while (next) {
|
|
struct dso_cache *cache;
|
|
|
|
cache = rb_entry(next, struct dso_cache, rb_node);
|
|
next = rb_next(&cache->rb_node);
|
|
rb_erase(&cache->rb_node, root);
|
|
free(cache);
|
|
}
|
|
pthread_mutex_unlock(&dso->lock);
|
|
}
|
|
|
|
static struct dso_cache *dso_cache__find(struct dso *dso, u64 offset)
|
|
{
|
|
const struct rb_root *root = &dso->data.cache;
|
|
struct rb_node * const *p = &root->rb_node;
|
|
const struct rb_node *parent = NULL;
|
|
struct dso_cache *cache;
|
|
|
|
while (*p != NULL) {
|
|
u64 end;
|
|
|
|
parent = *p;
|
|
cache = rb_entry(parent, struct dso_cache, rb_node);
|
|
end = cache->offset + DSO__DATA_CACHE_SIZE;
|
|
|
|
if (offset < cache->offset)
|
|
p = &(*p)->rb_left;
|
|
else if (offset >= end)
|
|
p = &(*p)->rb_right;
|
|
else
|
|
return cache;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct dso_cache *
|
|
dso_cache__insert(struct dso *dso, struct dso_cache *new)
|
|
{
|
|
struct rb_root *root = &dso->data.cache;
|
|
struct rb_node **p = &root->rb_node;
|
|
struct rb_node *parent = NULL;
|
|
struct dso_cache *cache;
|
|
u64 offset = new->offset;
|
|
|
|
pthread_mutex_lock(&dso->lock);
|
|
while (*p != NULL) {
|
|
u64 end;
|
|
|
|
parent = *p;
|
|
cache = rb_entry(parent, struct dso_cache, rb_node);
|
|
end = cache->offset + DSO__DATA_CACHE_SIZE;
|
|
|
|
if (offset < cache->offset)
|
|
p = &(*p)->rb_left;
|
|
else if (offset >= end)
|
|
p = &(*p)->rb_right;
|
|
else
|
|
goto out;
|
|
}
|
|
|
|
rb_link_node(&new->rb_node, parent, p);
|
|
rb_insert_color(&new->rb_node, root);
|
|
|
|
cache = NULL;
|
|
out:
|
|
pthread_mutex_unlock(&dso->lock);
|
|
return cache;
|
|
}
|
|
|
|
static ssize_t
|
|
dso_cache__memcpy(struct dso_cache *cache, u64 offset,
|
|
u8 *data, u64 size)
|
|
{
|
|
u64 cache_offset = offset - cache->offset;
|
|
u64 cache_size = min(cache->size - cache_offset, size);
|
|
|
|
memcpy(data, cache->data + cache_offset, cache_size);
|
|
return cache_size;
|
|
}
|
|
|
|
static ssize_t
|
|
dso_cache__read(struct dso *dso, struct machine *machine,
|
|
u64 offset, u8 *data, ssize_t size)
|
|
{
|
|
struct dso_cache *cache;
|
|
struct dso_cache *old;
|
|
ssize_t ret;
|
|
|
|
do {
|
|
u64 cache_offset;
|
|
|
|
cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE);
|
|
if (!cache)
|
|
return -ENOMEM;
|
|
|
|
pthread_mutex_lock(&dso__data_open_lock);
|
|
|
|
/*
|
|
* dso->data.fd might be closed if other thread opened another
|
|
* file (dso) due to open file limit (RLIMIT_NOFILE).
|
|
*/
|
|
try_to_open_dso(dso, machine);
|
|
|
|
if (dso->data.fd < 0) {
|
|
ret = -errno;
|
|
dso->data.status = DSO_DATA_STATUS_ERROR;
|
|
break;
|
|
}
|
|
|
|
cache_offset = offset & DSO__DATA_CACHE_MASK;
|
|
|
|
ret = pread(dso->data.fd, cache->data, DSO__DATA_CACHE_SIZE, cache_offset);
|
|
if (ret <= 0)
|
|
break;
|
|
|
|
cache->offset = cache_offset;
|
|
cache->size = ret;
|
|
} while (0);
|
|
|
|
pthread_mutex_unlock(&dso__data_open_lock);
|
|
|
|
if (ret > 0) {
|
|
old = dso_cache__insert(dso, cache);
|
|
if (old) {
|
|
/* we lose the race */
|
|
free(cache);
|
|
cache = old;
|
|
}
|
|
|
|
ret = dso_cache__memcpy(cache, offset, data, size);
|
|
}
|
|
|
|
if (ret <= 0)
|
|
free(cache);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t dso_cache_read(struct dso *dso, struct machine *machine,
|
|
u64 offset, u8 *data, ssize_t size)
|
|
{
|
|
struct dso_cache *cache;
|
|
|
|
cache = dso_cache__find(dso, offset);
|
|
if (cache)
|
|
return dso_cache__memcpy(cache, offset, data, size);
|
|
else
|
|
return dso_cache__read(dso, machine, offset, data, size);
|
|
}
|
|
|
|
/*
|
|
* Reads and caches dso data DSO__DATA_CACHE_SIZE size chunks
|
|
* in the rb_tree. Any read to already cached data is served
|
|
* by cached data.
|
|
*/
|
|
static ssize_t cached_read(struct dso *dso, struct machine *machine,
|
|
u64 offset, u8 *data, ssize_t size)
|
|
{
|
|
ssize_t r = 0;
|
|
u8 *p = data;
|
|
|
|
do {
|
|
ssize_t ret;
|
|
|
|
ret = dso_cache_read(dso, machine, offset, p, size);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Reached EOF, return what we have. */
|
|
if (!ret)
|
|
break;
|
|
|
|
BUG_ON(ret > size);
|
|
|
|
r += ret;
|
|
p += ret;
|
|
offset += ret;
|
|
size -= ret;
|
|
|
|
} while (size);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int data_file_size(struct dso *dso, struct machine *machine)
|
|
{
|
|
int ret = 0;
|
|
struct stat st;
|
|
char sbuf[STRERR_BUFSIZE];
|
|
|
|
if (dso->data.file_size)
|
|
return 0;
|
|
|
|
if (dso->data.status == DSO_DATA_STATUS_ERROR)
|
|
return -1;
|
|
|
|
pthread_mutex_lock(&dso__data_open_lock);
|
|
|
|
/*
|
|
* dso->data.fd might be closed if other thread opened another
|
|
* file (dso) due to open file limit (RLIMIT_NOFILE).
|
|
*/
|
|
try_to_open_dso(dso, machine);
|
|
|
|
if (dso->data.fd < 0) {
|
|
ret = -errno;
|
|
dso->data.status = DSO_DATA_STATUS_ERROR;
|
|
goto out;
|
|
}
|
|
|
|
if (fstat(dso->data.fd, &st) < 0) {
|
|
ret = -errno;
|
|
pr_err("dso cache fstat failed: %s\n",
|
|
str_error_r(errno, sbuf, sizeof(sbuf)));
|
|
dso->data.status = DSO_DATA_STATUS_ERROR;
|
|
goto out;
|
|
}
|
|
dso->data.file_size = st.st_size;
|
|
|
|
out:
|
|
pthread_mutex_unlock(&dso__data_open_lock);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* dso__data_size - Return dso data size
|
|
* @dso: dso object
|
|
* @machine: machine object
|
|
*
|
|
* Return: dso data size
|
|
*/
|
|
off_t dso__data_size(struct dso *dso, struct machine *machine)
|
|
{
|
|
if (data_file_size(dso, machine))
|
|
return -1;
|
|
|
|
/* For now just estimate dso data size is close to file size */
|
|
return dso->data.file_size;
|
|
}
|
|
|
|
static ssize_t data_read_offset(struct dso *dso, struct machine *machine,
|
|
u64 offset, u8 *data, ssize_t size)
|
|
{
|
|
if (data_file_size(dso, machine))
|
|
return -1;
|
|
|
|
/* Check the offset sanity. */
|
|
if (offset > dso->data.file_size)
|
|
return -1;
|
|
|
|
if (offset + size < offset)
|
|
return -1;
|
|
|
|
return cached_read(dso, machine, offset, data, size);
|
|
}
|
|
|
|
/**
|
|
* dso__data_read_offset - Read data from dso file offset
|
|
* @dso: dso object
|
|
* @machine: machine object
|
|
* @offset: file offset
|
|
* @data: buffer to store data
|
|
* @size: size of the @data buffer
|
|
*
|
|
* External interface to read data from dso file offset. Open
|
|
* dso data file and use cached_read to get the data.
|
|
*/
|
|
ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
|
|
u64 offset, u8 *data, ssize_t size)
|
|
{
|
|
if (dso->data.status == DSO_DATA_STATUS_ERROR)
|
|
return -1;
|
|
|
|
return data_read_offset(dso, machine, offset, data, size);
|
|
}
|
|
|
|
/**
|
|
* dso__data_read_addr - Read data from dso address
|
|
* @dso: dso object
|
|
* @machine: machine object
|
|
* @add: virtual memory address
|
|
* @data: buffer to store data
|
|
* @size: size of the @data buffer
|
|
*
|
|
* External interface to read data from dso address.
|
|
*/
|
|
ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
|
|
struct machine *machine, u64 addr,
|
|
u8 *data, ssize_t size)
|
|
{
|
|
u64 offset = map->map_ip(map, addr);
|
|
return dso__data_read_offset(dso, machine, offset, data, size);
|
|
}
|
|
|
|
struct map *dso__new_map(const char *name)
|
|
{
|
|
struct map *map = NULL;
|
|
struct dso *dso = dso__new(name);
|
|
|
|
if (dso)
|
|
map = map__new2(0, dso, MAP__FUNCTION);
|
|
|
|
return map;
|
|
}
|
|
|
|
struct dso *machine__findnew_kernel(struct machine *machine, const char *name,
|
|
const char *short_name, int dso_type)
|
|
{
|
|
/*
|
|
* The kernel dso could be created by build_id processing.
|
|
*/
|
|
struct dso *dso = machine__findnew_dso(machine, name);
|
|
|
|
/*
|
|
* We need to run this in all cases, since during the build_id
|
|
* processing we had no idea this was the kernel dso.
|
|
*/
|
|
if (dso != NULL) {
|
|
dso__set_short_name(dso, short_name, false);
|
|
dso->kernel = dso_type;
|
|
}
|
|
|
|
return dso;
|
|
}
|
|
|
|
/*
|
|
* Find a matching entry and/or link current entry to RB tree.
|
|
* Either one of the dso or name parameter must be non-NULL or the
|
|
* function will not work.
|
|
*/
|
|
static struct dso *__dso__findlink_by_longname(struct rb_root *root,
|
|
struct dso *dso, const char *name)
|
|
{
|
|
struct rb_node **p = &root->rb_node;
|
|
struct rb_node *parent = NULL;
|
|
|
|
if (!name)
|
|
name = dso->long_name;
|
|
/*
|
|
* Find node with the matching name
|
|
*/
|
|
while (*p) {
|
|
struct dso *this = rb_entry(*p, struct dso, rb_node);
|
|
int rc = strcmp(name, this->long_name);
|
|
|
|
parent = *p;
|
|
if (rc == 0) {
|
|
/*
|
|
* In case the new DSO is a duplicate of an existing
|
|
* one, print a one-time warning & put the new entry
|
|
* at the end of the list of duplicates.
|
|
*/
|
|
if (!dso || (dso == this))
|
|
return this; /* Find matching dso */
|
|
/*
|
|
* The core kernel DSOs may have duplicated long name.
|
|
* In this case, the short name should be different.
|
|
* Comparing the short names to differentiate the DSOs.
|
|
*/
|
|
rc = strcmp(dso->short_name, this->short_name);
|
|
if (rc == 0) {
|
|
pr_err("Duplicated dso name: %s\n", name);
|
|
return NULL;
|
|
}
|
|
}
|
|
if (rc < 0)
|
|
p = &parent->rb_left;
|
|
else
|
|
p = &parent->rb_right;
|
|
}
|
|
if (dso) {
|
|
/* Add new node and rebalance tree */
|
|
rb_link_node(&dso->rb_node, parent, p);
|
|
rb_insert_color(&dso->rb_node, root);
|
|
dso->root = root;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct dso *__dso__find_by_longname(struct rb_root *root,
|
|
const char *name)
|
|
{
|
|
return __dso__findlink_by_longname(root, NULL, name);
|
|
}
|
|
|
|
void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated)
|
|
{
|
|
struct rb_root *root = dso->root;
|
|
|
|
if (name == NULL)
|
|
return;
|
|
|
|
if (dso->long_name_allocated)
|
|
free((char *)dso->long_name);
|
|
|
|
if (root) {
|
|
rb_erase(&dso->rb_node, root);
|
|
/*
|
|
* __dso__findlink_by_longname() isn't guaranteed to add it
|
|
* back, so a clean removal is required here.
|
|
*/
|
|
RB_CLEAR_NODE(&dso->rb_node);
|
|
dso->root = NULL;
|
|
}
|
|
|
|
dso->long_name = name;
|
|
dso->long_name_len = strlen(name);
|
|
dso->long_name_allocated = name_allocated;
|
|
|
|
if (root)
|
|
__dso__findlink_by_longname(root, dso, NULL);
|
|
}
|
|
|
|
void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated)
|
|
{
|
|
if (name == NULL)
|
|
return;
|
|
|
|
if (dso->short_name_allocated)
|
|
free((char *)dso->short_name);
|
|
|
|
dso->short_name = name;
|
|
dso->short_name_len = strlen(name);
|
|
dso->short_name_allocated = name_allocated;
|
|
}
|
|
|
|
static void dso__set_basename(struct dso *dso)
|
|
{
|
|
/*
|
|
* basename() may modify path buffer, so we must pass
|
|
* a copy.
|
|
*/
|
|
char *base, *lname = strdup(dso->long_name);
|
|
|
|
if (!lname)
|
|
return;
|
|
|
|
/*
|
|
* basename() may return a pointer to internal
|
|
* storage which is reused in subsequent calls
|
|
* so copy the result.
|
|
*/
|
|
base = strdup(basename(lname));
|
|
|
|
free(lname);
|
|
|
|
if (!base)
|
|
return;
|
|
|
|
dso__set_short_name(dso, base, true);
|
|
}
|
|
|
|
int dso__name_len(const struct dso *dso)
|
|
{
|
|
if (!dso)
|
|
return strlen("[unknown]");
|
|
if (verbose > 0)
|
|
return dso->long_name_len;
|
|
|
|
return dso->short_name_len;
|
|
}
|
|
|
|
bool dso__loaded(const struct dso *dso, enum map_type type)
|
|
{
|
|
return dso->loaded & (1 << type);
|
|
}
|
|
|
|
bool dso__sorted_by_name(const struct dso *dso, enum map_type type)
|
|
{
|
|
return dso->sorted_by_name & (1 << type);
|
|
}
|
|
|
|
void dso__set_sorted_by_name(struct dso *dso, enum map_type type)
|
|
{
|
|
dso->sorted_by_name |= (1 << type);
|
|
}
|
|
|
|
struct dso *dso__new(const char *name)
|
|
{
|
|
struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1);
|
|
|
|
if (dso != NULL) {
|
|
int i;
|
|
strcpy(dso->name, name);
|
|
dso__set_long_name(dso, dso->name, false);
|
|
dso__set_short_name(dso, dso->name, false);
|
|
for (i = 0; i < MAP__NR_TYPES; ++i)
|
|
dso->symbols[i] = dso->symbol_names[i] = RB_ROOT;
|
|
dso->data.cache = RB_ROOT;
|
|
dso->data.fd = -1;
|
|
dso->data.status = DSO_DATA_STATUS_UNKNOWN;
|
|
dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND;
|
|
dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND;
|
|
dso->is_64_bit = (sizeof(void *) == 8);
|
|
dso->loaded = 0;
|
|
dso->rel = 0;
|
|
dso->sorted_by_name = 0;
|
|
dso->has_build_id = 0;
|
|
dso->has_srcline = 1;
|
|
dso->a2l_fails = 1;
|
|
dso->kernel = DSO_TYPE_USER;
|
|
dso->needs_swap = DSO_SWAP__UNSET;
|
|
RB_CLEAR_NODE(&dso->rb_node);
|
|
dso->root = NULL;
|
|
INIT_LIST_HEAD(&dso->node);
|
|
INIT_LIST_HEAD(&dso->data.open_entry);
|
|
pthread_mutex_init(&dso->lock, NULL);
|
|
refcount_set(&dso->refcnt, 1);
|
|
}
|
|
|
|
return dso;
|
|
}
|
|
|
|
void dso__delete(struct dso *dso)
|
|
{
|
|
int i;
|
|
|
|
if (!RB_EMPTY_NODE(&dso->rb_node))
|
|
pr_err("DSO %s is still in rbtree when being deleted!\n",
|
|
dso->long_name);
|
|
for (i = 0; i < MAP__NR_TYPES; ++i)
|
|
symbols__delete(&dso->symbols[i]);
|
|
|
|
if (dso->short_name_allocated) {
|
|
zfree((char **)&dso->short_name);
|
|
dso->short_name_allocated = false;
|
|
}
|
|
|
|
if (dso->long_name_allocated) {
|
|
zfree((char **)&dso->long_name);
|
|
dso->long_name_allocated = false;
|
|
}
|
|
|
|
dso__data_close(dso);
|
|
auxtrace_cache__free(dso->auxtrace_cache);
|
|
dso_cache__free(dso);
|
|
dso__free_a2l(dso);
|
|
zfree(&dso->symsrc_filename);
|
|
nsinfo__zput(dso->nsinfo);
|
|
pthread_mutex_destroy(&dso->lock);
|
|
free(dso);
|
|
}
|
|
|
|
struct dso *dso__get(struct dso *dso)
|
|
{
|
|
if (dso)
|
|
refcount_inc(&dso->refcnt);
|
|
return dso;
|
|
}
|
|
|
|
void dso__put(struct dso *dso)
|
|
{
|
|
if (dso && refcount_dec_and_test(&dso->refcnt))
|
|
dso__delete(dso);
|
|
}
|
|
|
|
void dso__set_build_id(struct dso *dso, void *build_id)
|
|
{
|
|
memcpy(dso->build_id, build_id, sizeof(dso->build_id));
|
|
dso->has_build_id = 1;
|
|
}
|
|
|
|
bool dso__build_id_equal(const struct dso *dso, u8 *build_id)
|
|
{
|
|
return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0;
|
|
}
|
|
|
|
void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine)
|
|
{
|
|
char path[PATH_MAX];
|
|
|
|
if (machine__is_default_guest(machine))
|
|
return;
|
|
sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
|
|
if (sysfs__read_build_id(path, dso->build_id,
|
|
sizeof(dso->build_id)) == 0)
|
|
dso->has_build_id = true;
|
|
}
|
|
|
|
int dso__kernel_module_get_build_id(struct dso *dso,
|
|
const char *root_dir)
|
|
{
|
|
char filename[PATH_MAX];
|
|
/*
|
|
* kernel module short names are of the form "[module]" and
|
|
* we need just "module" here.
|
|
*/
|
|
const char *name = dso->short_name + 1;
|
|
|
|
snprintf(filename, sizeof(filename),
|
|
"%s/sys/module/%.*s/notes/.note.gnu.build-id",
|
|
root_dir, (int)strlen(name) - 1, name);
|
|
|
|
if (sysfs__read_build_id(filename, dso->build_id,
|
|
sizeof(dso->build_id)) == 0)
|
|
dso->has_build_id = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
|
|
{
|
|
bool have_build_id = false;
|
|
struct dso *pos;
|
|
struct nscookie nsc;
|
|
|
|
list_for_each_entry(pos, head, node) {
|
|
if (with_hits && !pos->hit && !dso__is_vdso(pos))
|
|
continue;
|
|
if (pos->has_build_id) {
|
|
have_build_id = true;
|
|
continue;
|
|
}
|
|
nsinfo__mountns_enter(pos->nsinfo, &nsc);
|
|
if (filename__read_build_id(pos->long_name, pos->build_id,
|
|
sizeof(pos->build_id)) > 0) {
|
|
have_build_id = true;
|
|
pos->has_build_id = true;
|
|
}
|
|
nsinfo__mountns_exit(&nsc);
|
|
}
|
|
|
|
return have_build_id;
|
|
}
|
|
|
|
void __dsos__add(struct dsos *dsos, struct dso *dso)
|
|
{
|
|
list_add_tail(&dso->node, &dsos->head);
|
|
__dso__findlink_by_longname(&dsos->root, dso, NULL);
|
|
/*
|
|
* It is now in the linked list, grab a reference, then garbage collect
|
|
* this when needing memory, by looking at LRU dso instances in the
|
|
* list with atomic_read(&dso->refcnt) == 1, i.e. no references
|
|
* anywhere besides the one for the list, do, under a lock for the
|
|
* list: remove it from the list, then a dso__put(), that probably will
|
|
* be the last and will then call dso__delete(), end of life.
|
|
*
|
|
* That, or at the end of the 'struct machine' lifetime, when all
|
|
* 'struct dso' instances will be removed from the list, in
|
|
* dsos__exit(), if they have no other reference from some other data
|
|
* structure.
|
|
*
|
|
* E.g.: after processing a 'perf.data' file and storing references
|
|
* to objects instantiated while processing events, we will have
|
|
* references to the 'thread', 'map', 'dso' structs all from 'struct
|
|
* hist_entry' instances, but we may not need anything not referenced,
|
|
* so we might as well call machines__exit()/machines__delete() and
|
|
* garbage collect it.
|
|
*/
|
|
dso__get(dso);
|
|
}
|
|
|
|
void dsos__add(struct dsos *dsos, struct dso *dso)
|
|
{
|
|
pthread_rwlock_wrlock(&dsos->lock);
|
|
__dsos__add(dsos, dso);
|
|
pthread_rwlock_unlock(&dsos->lock);
|
|
}
|
|
|
|
struct dso *__dsos__find(struct dsos *dsos, const char *name, bool cmp_short)
|
|
{
|
|
struct dso *pos;
|
|
|
|
if (cmp_short) {
|
|
list_for_each_entry(pos, &dsos->head, node)
|
|
if (strcmp(pos->short_name, name) == 0)
|
|
return pos;
|
|
return NULL;
|
|
}
|
|
return __dso__find_by_longname(&dsos->root, name);
|
|
}
|
|
|
|
struct dso *dsos__find(struct dsos *dsos, const char *name, bool cmp_short)
|
|
{
|
|
struct dso *dso;
|
|
pthread_rwlock_rdlock(&dsos->lock);
|
|
dso = __dsos__find(dsos, name, cmp_short);
|
|
pthread_rwlock_unlock(&dsos->lock);
|
|
return dso;
|
|
}
|
|
|
|
struct dso *__dsos__addnew(struct dsos *dsos, const char *name)
|
|
{
|
|
struct dso *dso = dso__new(name);
|
|
|
|
if (dso != NULL) {
|
|
__dsos__add(dsos, dso);
|
|
dso__set_basename(dso);
|
|
/* Put dso here because __dsos_add already got it */
|
|
dso__put(dso);
|
|
}
|
|
return dso;
|
|
}
|
|
|
|
struct dso *__dsos__findnew(struct dsos *dsos, const char *name)
|
|
{
|
|
struct dso *dso = __dsos__find(dsos, name, false);
|
|
|
|
return dso ? dso : __dsos__addnew(dsos, name);
|
|
}
|
|
|
|
struct dso *dsos__findnew(struct dsos *dsos, const char *name)
|
|
{
|
|
struct dso *dso;
|
|
pthread_rwlock_wrlock(&dsos->lock);
|
|
dso = dso__get(__dsos__findnew(dsos, name));
|
|
pthread_rwlock_unlock(&dsos->lock);
|
|
return dso;
|
|
}
|
|
|
|
size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
|
|
bool (skip)(struct dso *dso, int parm), int parm)
|
|
{
|
|
struct dso *pos;
|
|
size_t ret = 0;
|
|
|
|
list_for_each_entry(pos, head, node) {
|
|
if (skip && skip(pos, parm))
|
|
continue;
|
|
ret += dso__fprintf_buildid(pos, fp);
|
|
ret += fprintf(fp, " %s\n", pos->long_name);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
size_t __dsos__fprintf(struct list_head *head, FILE *fp)
|
|
{
|
|
struct dso *pos;
|
|
size_t ret = 0;
|
|
|
|
list_for_each_entry(pos, head, node) {
|
|
int i;
|
|
for (i = 0; i < MAP__NR_TYPES; ++i)
|
|
ret += dso__fprintf(pos, i, fp);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
size_t dso__fprintf_buildid(struct dso *dso, FILE *fp)
|
|
{
|
|
char sbuild_id[SBUILD_ID_SIZE];
|
|
|
|
build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
|
|
return fprintf(fp, "%s", sbuild_id);
|
|
}
|
|
|
|
size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp)
|
|
{
|
|
struct rb_node *nd;
|
|
size_t ret = fprintf(fp, "dso: %s (", dso->short_name);
|
|
|
|
if (dso->short_name != dso->long_name)
|
|
ret += fprintf(fp, "%s, ", dso->long_name);
|
|
ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type],
|
|
dso__loaded(dso, type) ? "" : "NOT ");
|
|
ret += dso__fprintf_buildid(dso, fp);
|
|
ret += fprintf(fp, ")\n");
|
|
for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) {
|
|
struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
|
|
ret += symbol__fprintf(pos, fp);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
enum dso_type dso__type(struct dso *dso, struct machine *machine)
|
|
{
|
|
int fd;
|
|
enum dso_type type = DSO__TYPE_UNKNOWN;
|
|
|
|
fd = dso__data_get_fd(dso, machine);
|
|
if (fd >= 0) {
|
|
type = dso__type_fd(fd);
|
|
dso__data_put_fd(dso);
|
|
}
|
|
|
|
return type;
|
|
}
|
|
|
|
int dso__strerror_load(struct dso *dso, char *buf, size_t buflen)
|
|
{
|
|
int idx, errnum = dso->load_errno;
|
|
/*
|
|
* This must have a same ordering as the enum dso_load_errno.
|
|
*/
|
|
static const char *dso_load__error_str[] = {
|
|
"Internal tools/perf/ library error",
|
|
"Invalid ELF file",
|
|
"Can not read build id",
|
|
"Mismatching build id",
|
|
"Decompression failure",
|
|
};
|
|
|
|
BUG_ON(buflen == 0);
|
|
|
|
if (errnum >= 0) {
|
|
const char *err = str_error_r(errnum, buf, buflen);
|
|
|
|
if (err != buf)
|
|
scnprintf(buf, buflen, "%s", err);
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (errnum < __DSO_LOAD_ERRNO__START || errnum >= __DSO_LOAD_ERRNO__END)
|
|
return -1;
|
|
|
|
idx = errnum - __DSO_LOAD_ERRNO__START;
|
|
scnprintf(buf, buflen, "%s", dso_load__error_str[idx]);
|
|
return 0;
|
|
}
|