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fix: 用可移植的 dlopen 方案替换内部 _dl_sym 符号，修复 GLIBC_PRIVATE 错误 #175

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fix: 用可移植的 dlopen 方案替换内部 _dl_sym 符号，修复 GLIBC_PRIVATE 错误 #175

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2 changes: 0 additions & 2 deletions src/include/libvgpu.h
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Original file line number Diff line number Diff line change
Expand Up @@ -29,8 +29,6 @@ extern void load_cuda_libraries();

#define FUNC_OVERRIDE_NAME(fname) overrided_##fname

extern void* _dl_sym(void*, const char*, void*);

#if defined(DLSYM_HOOK_DEBUG)
#define DLSYM_HOOK_FUNC(f) \
if (0 == strcmp(symbol, #f)) { \
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14 changes: 10 additions & 4 deletions src/libvgpu.c
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Original file line number Diff line number Diff line change
Expand Up @@ -99,9 +99,12 @@ FUNC_ATTR_VISIBLE void* dlsym(void* handle, const char* symbol) {
}
if (real_dlsym == NULL) {
LOG_ERROR("real dlsym not found");
real_dlsym = _dl_sym(RTLD_NEXT, "dlsym", dlsym);
void *libc_handle = dlopen("libc.so.6", RTLD_LAZY);
if (libc_handle) {
real_dlsym = dlsym(libc_handle, "dlsym");
}
if (real_dlsym == NULL)
LOG_ERROR("real dlsym not found");
LOG_ERROR("real dlsym not found after trying libc.so.6");
}
}
if (handle == RTLD_NEXT) {
Expand Down Expand Up @@ -858,9 +861,12 @@ void preInit(){
real_dlsym = dlvsym(RTLD_NEXT,"dlsym","GLIBC_2.2.5");
if (real_dlsym == NULL) {
LOG_ERROR("real dlsym not found");
real_dlsym = _dl_sym(RTLD_NEXT, "dlsym", dlsym);
if (real_dlsym == NULL)
void *libc_handle = dlopen("libc.so.6", RTLD_LAZY);
if (libc_handle) {
real_dlsym = dlsym(libc_handle, "dlsym");
} else {
LOG_ERROR("real dlsym not found");
}
}
}
real_realpath = NULL;
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7 changes: 4 additions & 3 deletions src/nvml/hook.c
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Expand Up @@ -267,16 +267,17 @@ nvmlReturn_t nvmlDeviceGetIndex(nvmlDevice_t device, unsigned int *index) {
}


extern void* _dl_sym(void*, const char*, void*);

void load_nvml_libraries() {
void *table = NULL;
char driver_filename[FILENAME_MAX];

if (real_dlsym == NULL) {
real_dlsym = dlvsym(RTLD_NEXT,"dlsym","GLIBC_2.2.5");
if (real_dlsym == NULL) {
real_dlsym = _dl_sym(RTLD_NEXT, "dlsym", dlsym);
void *libc_handle = dlopen("libc.so.6", RTLD_LAZY);
if (libc_handle) {
real_dlsym = dlsym(libc_handle, "dlsym");
}
if (real_dlsym == NULL)
LOG_ERROR("real dlsym not found");
}
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