JvmTI agent problem

Question

My jvm agent as follows:
JNIEXPORT jint JNICALL
Agent_OnLoad(JavaVM *jvm, char *options, void *reserved)
  // simple code
printf("Test for jvm agent \n");
return 0;
JNIEXPORT void JNICALL
Agent_OnUnload(JavaVM *vm)
// nothing to do.
2. and my makefile:
AVA_HOME =C:\Dev_Tools\Java\jdk1.6.0_26
JDK_HOME = C:\Dev_Tools\Java\jdk1.6.0_26
C = gcc
CXX = gcc
OPT = -O2
DEBUG = -g
INCDIR = -I.
LIBDIR = -L.
CFLAGS = -fno-strict-aliasing -fPIC -fno-omit-frame-pointer -W -Wall -DSC_INCLUDE_FX -m32 -static-libgcc  -kill-at
LINKFLAGS = -D_JNI_IMPLEMENTATION_ -fno-omit-frame-pointer -m32 -static-libgcc -shared
JDK_INCL = -I$(JDK_HOME)/include -I$(JDK_HOME)/include/win32
DYLIB_FLAGS = -dynamiclib -flat_namespace -undefined suppress
CXXCOMPILE = $(CXX) -c $(CFLAGS) $(INCDIR) $(LIBDIR) $(JDK_INCL)
CXXLINK = $(CXX) $(LINKFLAGS) $(LIBDIR)
LIBS = -lm
EXEC = TraceAgent.dll
HEADS =
IMPLS = $(HEADS:.h=.c)
SRCS = main.c $(IMPLS)
OBJS = $(SRCS:.c=.o)
COMMON =
all: $(EXEC)
$(EXEC): $(OBJS)
  $(CXXLINK) -o $(EXEC) $(OBJS) $(LIBS)
main.o: main.c $(HEADS) $(COMMON)
  $(CXXCOMPILE) -o $@ $<
%.o: %.c %.h $(COMMON)
  $(CXXCOMPILE) -o $@ $<
clean:
  rm $(EXEC) $(OBJS) *~
cmd> make all
and gen a dll file named : TraceAgent.dll
And I copy this dll file to my fold
java code:  java -agentpath:E:\moaworksp\JvmTest\bin\TraceAgent.dll com.AgentSample
but eror as follows:
Error occurred during initialization of VM
Could not find Agent_OnLoad function in the agent library: E:\moaworksp\JvmTest\bin\TraceAgent.dll
How can I do?
By the way ,my Java source file AgentSamole is a simple main java for test.
Thanks in advance.

Answer 1

I got it.
Pls use visual C++ compile the code , and gen the DLL file ,and this will be  run OK.