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Merged
jbachorik merged 9 commits into from
Jul 15, 2025
Merged

Downport async-profiler no-allocation changes #245

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a51b652
v0
zhengyu123 Jul 10, 2025
324a5af
v1
zhengyu123 Jul 10, 2025
09afb2d
v2
zhengyu123 Jul 11, 2025
06c1d13
v3
zhengyu123 Jul 11, 2025
9563bab
v4
zhengyu123 Jul 11, 2025
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v5
zhengyu123 Jul 11, 2025
a043051
v6
zhengyu123 Jul 11, 2025
beeb8d2
Cleanup
zhengyu123 Jul 11, 2025
ec3cafc
Merge branch 'main' into zgu/backport-tcmalloc
zhengyu123 Jul 14, 2025
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v6
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@zhengyu123
zhengyu123 committed Jul 11, 2025
commit a043051a073a05427e7cfc73b89cd94b96cdf0d7
13 changes: 13 additions & 0 deletions ddprof-lib/src/main/cpp/symbols_linux.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/auxv.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
Expand Down Expand Up @@ -681,6 +682,18 @@ static bool verifyBaseAddress(const CodeCache* cc, void* lib_handle) {
return cc->imageBase() == (const char*)dl_info.dli_fbase;
}

static const void* getMainPhdr() {
void* main_phdr = NULL;
dl_iterate_phdr([](struct dl_phdr_info* info, size_t size, void* data) {
*(const void**)data = info->dlpi_phdr;
return 1;
}, &main_phdr);
return main_phdr;
}

static const void* _main_phdr = getMainPhdr();
static const char* _ld_base = (const char*)getauxval(AT_BASE);

static bool isMainExecutable(const char* image_base, const void* map_end) {
return _main_phdr != NULL && _main_phdr >= image_base && _main_phdr < map_end;
}
Expand Down