Mercurial > hg > truffle
diff src/os/linux/vm/os_linux.cpp @ 8812:14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
Summary: Call dlerror() in VM thread as necessary.
Reviewed-by: coleenp, dholmes
author | iklam |
---|---|
date | Thu, 21 Mar 2013 20:46:46 -0700 |
parents | 6b803ba47588 |
children | 15c04fe93c18 17bf4d428955 |
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--- a/src/os/linux/vm/os_linux.cpp Thu Mar 21 06:53:53 2013 -0700 +++ b/src/os/linux/vm/os_linux.cpp Thu Mar 21 20:46:46 2013 -0700 @@ -1811,13 +1811,15 @@ class VM_LinuxDllLoad: public VM_Operation { private: const char *_filename; + char *_ebuf; + int _ebuflen; void *_lib; public: - VM_LinuxDllLoad(const char *fn) : - _filename(fn), _lib(NULL) {} + VM_LinuxDllLoad(const char *fn, char *ebuf, int ebuflen) : + _filename(fn), _ebuf(ebuf), _ebuflen(ebuflen), _lib(NULL) {} VMOp_Type type() const { return VMOp_LinuxDllLoad; } void doit() { - _lib = os::Linux::dll_load_inner(_filename); + _lib = os::Linux::dll_load_in_vmthread(_filename, _ebuf, _ebuflen); os::Linux::_stack_is_executable = true; } void* loaded_library() { return _lib; } @@ -1865,13 +1867,13 @@ // This is for the case where the DLL has an static // constructor function that executes JNI code. We cannot // load such DLLs in the VMThread. - result = ::dlopen(filename, RTLD_LAZY); + result = os::Linux::dlopen_helper(filename, ebuf, ebuflen); } ThreadInVMfromNative tiv(jt); debug_only(VMNativeEntryWrapper vew;) - VM_LinuxDllLoad op(filename); + VM_LinuxDllLoad op(filename, ebuf, ebuflen); VMThread::execute(&op); if (LoadExecStackDllInVMThread) { result = op.loaded_library(); @@ -1883,7 +1885,7 @@ } if (!load_attempted) { - result = ::dlopen(filename, RTLD_LAZY); + result = os::Linux::dlopen_helper(filename, ebuf, ebuflen); } if (result != NULL) { @@ -1892,11 +1894,6 @@ } Elf32_Ehdr elf_head; - - // Read system error message into ebuf - // It may or may not be overwritten below - ::strncpy(ebuf, ::dlerror(), ebuflen-1); - ebuf[ebuflen-1]='\0'; int diag_msg_max_length=ebuflen-strlen(ebuf); char* diag_msg_buf=ebuf+strlen(ebuf); @@ -2039,10 +2036,19 @@ return NULL; } -void * os::Linux::dll_load_inner(const char *filename) { +void * os::Linux::dlopen_helper(const char *filename, char *ebuf, int ebuflen) { + void * result = ::dlopen(filename, RTLD_LAZY); + if (result == NULL) { + ::strncpy(ebuf, ::dlerror(), ebuflen - 1); + ebuf[ebuflen-1] = '\0'; + } + return result; +} + +void * os::Linux::dll_load_in_vmthread(const char *filename, char *ebuf, int ebuflen) { void * result = NULL; if (LoadExecStackDllInVMThread) { - result = ::dlopen(filename, RTLD_LAZY); + result = dlopen_helper(filename, ebuf, ebuflen); } // Since 7019808, libjvm.so is linked with -noexecstack. If the VM loads a