mcinspect: vtop (in progress)
Change-Id: I09f487e96edc7c4f59c97e6fb6dde28baf84c1e5
This commit is contained in:
Balazs Gerofi
committed by
Masamichi Takagi
Masamichi Takagi
parent
91146acfe5
commit
5224551782
@ -22,6 +22,7 @@
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#include <libdwarf/libdwarf.h>
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#include <getopt.h>
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#include <libgen.h>
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#include <bfd.h>
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void usage(char **argv)
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{
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@ -32,22 +33,88 @@ void usage(char **argv)
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printf(" --help Display this help message.\n");
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printf(" --kernel PATH Path to kernel image.\n");
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printf(" --ps List processes running on LWK.\n");
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printf(" -v, --vtop [ADDR] Display page table corresponding to ADDR\n");
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printf(" or dump all page tables.\n");
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printf(" --vtop Dump page tables.\n");
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printf(" -v, --va ADDR Dump page tables for ADDR only.\n");
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printf(" -p, --pid PID Use process PID for vtop.\n");
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printf(" --debug Enable debug mode.\n");
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printf("\n");
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printf("Example: \n");
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printf("Examples: \n");
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printf(" %s --kernel=smp-x86/kernel/mckernel.img --ps\n", basename(argv[0]));
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printf(" %s --kernel=smp-x86/kernel/mckernel.img --vtop --pid 100 --va 0x3fffff800000\n",
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basename(argv[0]));
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}
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int debug;
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int mcfd;
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/*
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* BFD based symbol table
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*/
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bfd *symbfd = NULL;
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asymbol **symtab = NULL;
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ssize_t nsyms;
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#define NOSYMBOL (-1UL)
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unsigned long int lookup_bfd_symbol(char *name)
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{
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int i;
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for (i = 0; i < nsyms; ++i) {
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if (!strcmp(symtab[i]->name, name)) {
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return (symtab[i]->section->vma + symtab[i]->value);
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}
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}
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return NOSYMBOL;
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}
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int init_bfd_symbols(char *fname) {
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ssize_t needs;
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bfd_boolean ok;
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symbfd = bfd_openr(fname, NULL);
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if (!symbfd) {
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bfd_perror("bfd_openr");
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return -1;
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}
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ok = bfd_check_format(symbfd, bfd_object);
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if (!ok) {
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bfd_perror("bfd_check_format");
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return -1;
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}
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needs = bfd_get_symtab_upper_bound(symbfd);
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if (needs < 0) {
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bfd_perror("bfd_get_symtab_upper_bound");
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return -1;
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}
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if (!needs) {
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printf("no symbols\n");
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return -1;
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}
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symtab = malloc(needs);
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if (!symtab) {
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perror("malloc");
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return -1;
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}
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nsyms = bfd_canonicalize_symtab(symbfd, symtab);
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if (nsyms < 0) {
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bfd_perror("bfd_canonicalize_symtab");
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return -1;
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}
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return 0;
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}
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/*
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* Walk DWARF tree and call func with arg for each Die
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*/
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static int dwarf_walk_tree(Dwarf_Debug dbg,
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int dwarf_walk_tree(Dwarf_Debug dbg,
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int (*func)(Dwarf_Debug dbg, Dwarf_Die die, void *arg), void *arg)
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{
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Dwarf_Bool is_info;
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@ -191,7 +258,7 @@ static int dwarf_walk_tree(Dwarf_Debug dbg,
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return -1;
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}
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static int dwarf_get_size(Dwarf_Debug dbg,
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int dwarf_get_size(Dwarf_Debug dbg,
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Dwarf_Die die,
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unsigned long *psize,
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Dwarf_Error *perr)
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@ -345,7 +412,7 @@ out:
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})
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static int dwarf_get_offset(Dwarf_Debug dbg,
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int dwarf_get_offset(Dwarf_Debug dbg,
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Dwarf_Die die,
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unsigned long *poffset,
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Dwarf_Error *perr)
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@ -560,7 +627,7 @@ out:
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/*
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* Find the address of a global variable.
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*/
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static int dwarf_get_address(Dwarf_Debug dbg,
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int dwarf_get_address(Dwarf_Debug dbg,
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Dwarf_Die die,
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unsigned long *paddr,
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Dwarf_Error *perr)
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@ -611,6 +678,7 @@ static int dwarf_get_address(Dwarf_Debug dbg,
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if (attr_i != DW_AT_location) {
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continue;
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}
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printf("%s: DW_AT_location\n", __func__);
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rc = dwarf_whatform(attr, &form, perr);
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if (rc != DW_DLV_OK) {
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@ -779,8 +847,11 @@ int dwarf_global_var_addr(Dwarf_Debug dbg, Dwarf_Die die, void *arg)
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goto out;
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}
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printf("%s: inspecting %s\n", __func__, name);
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rc = dwarf_get_address(dbg, die, &addr, &err);
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if (rc == DW_DLV_NO_ENTRY) {
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printf("%s: inspecting %s -> DW_DLV_NO_ENTRY for addr?\n", __func__, name);
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goto out;
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}
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else if (rc != DW_DLV_OK) {
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@ -812,11 +883,14 @@ out:
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.variable = #__variable__, \
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.addrp = &addr, \
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}; \
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rc = dwarf_walk_tree(dbg, dwarf_global_var_addr, &gva); \
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if (rc != DW_DLV_OK) { \
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fprintf(stderr, "%s: error: finding addr of %s\n", \
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__func__, gva.variable); \
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exit(1); \
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addr = lookup_bfd_symbol(gva.variable); \
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if (addr == NOSYMBOL) { \
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rc = dwarf_walk_tree(dbg, dwarf_global_var_addr, &gva); \
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if (rc != DW_DLV_OK) { \
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fprintf(stderr, "%s: error: finding addr of %s\n", \
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__func__, gva.variable); \
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exit(1); \
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} \
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} \
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addr; \
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})
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@ -831,7 +905,7 @@ struct ihk_os_read_kaddr_desc {
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void *ubuf;
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};
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static void ihk_read_kernel(unsigned long addr,
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void ihk_read_kernel(unsigned long addr,
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unsigned long len, void *buf)
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{
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struct ihk_os_read_kaddr_desc desc;
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@ -850,6 +924,14 @@ static void ihk_read_kernel(unsigned long addr,
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#define ihk_read_val(addr, pval) \
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ihk_read_kernel(addr, sizeof(*pval), (void *)pval)
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#define get_pointer_symbol_val(__variable__, pval) \
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({ \
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unsigned long addr; \
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addr = DWARF_GET_VARIABLE_ADDRESS(__variable__); \
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ihk_read_kernel(addr, sizeof(*pval), (void *)pval); \
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})
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#define PS_RUNNING 0x1
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#define PS_INTERRUPTIBLE 0x2
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#define PS_UNINTERRUPTIBLE 0x4
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@ -857,6 +939,9 @@ static void ihk_read_kernel(unsigned long addr,
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#define PS_EXITED 0x10
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#define PS_STOPPED 0x20
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/*
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* Globals
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*/
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int nr_cpus;
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unsigned long clv;
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unsigned long clv_size;
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@ -868,10 +953,44 @@ unsigned long thread_sched_list_offset;
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unsigned long thread_proc_offset;
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unsigned long thread_status_offset;
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unsigned long process_pid_offset;
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unsigned long process_vm_offset;
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unsigned long process_saved_cmdline_offset;
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unsigned long process_saved_cmdline_len_offset;
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unsigned long vm_address_space_offset;
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unsigned long address_space_page_table_offset;
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static void print_thread(int cpu,
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void init_globals(Dwarf_Debug dbg)
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{
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unsigned long num_processors_addr;
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num_processors_addr = DWARF_GET_VARIABLE_ADDRESS(mck_num_processors);
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ihk_read_val(num_processors_addr, &num_processors_addr);
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ihk_read_val(num_processors_addr, &nr_cpus);
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ihk_read_val(DWARF_GET_VARIABLE_ADDRESS(clv), &clv);
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clv_size = DWARF_GET_SIZE(cpu_local_var);
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clv_runq_offset = DWARF_GET_OFFSET_IN_STRUCT(cpu_local_var, runq);
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clv_idle_offset = DWARF_GET_OFFSET_IN_STRUCT(cpu_local_var, idle);
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clv_current_offset = DWARF_GET_OFFSET_IN_STRUCT(cpu_local_var, current);
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thread_tid_offset = DWARF_GET_OFFSET_IN_STRUCT(thread, tid);
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thread_proc_offset = DWARF_GET_OFFSET_IN_STRUCT(thread, proc);
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thread_status_offset = DWARF_GET_OFFSET_IN_STRUCT(thread, status);
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thread_sched_list_offset =
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DWARF_GET_OFFSET_IN_STRUCT(thread, sched_list);
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process_pid_offset = DWARF_GET_OFFSET_IN_STRUCT(process, pid);
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process_saved_cmdline_offset =
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DWARF_GET_OFFSET_IN_STRUCT(process, saved_cmdline);
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process_saved_cmdline_len_offset =
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DWARF_GET_OFFSET_IN_STRUCT(process, saved_cmdline_len);
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process_vm_offset =
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DWARF_GET_OFFSET_IN_STRUCT(process, vm);
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vm_address_space_offset =
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DWARF_GET_OFFSET_IN_STRUCT(process_vm, address_space);
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address_space_page_table_offset =
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DWARF_GET_OFFSET_IN_STRUCT(address_space, page_table);
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}
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void print_thread(int cpu,
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unsigned long thread,
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unsigned long idle,
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int active)
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@ -925,31 +1044,9 @@ static void print_thread(int cpu,
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free(cmd_line);
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}
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static int mcps(Dwarf_Debug dbg)
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int mcps(Dwarf_Debug dbg)
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{
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int cpu;
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unsigned long num_processors_addr;
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num_processors_addr = DWARF_GET_VARIABLE_ADDRESS(mck_num_processors);
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ihk_read_val(num_processors_addr, &num_processors_addr);
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ihk_read_val(num_processors_addr, &nr_cpus);
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ihk_read_val(DWARF_GET_VARIABLE_ADDRESS(clv), &clv);
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clv_size = DWARF_GET_SIZE(cpu_local_var);
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clv_runq_offset = DWARF_GET_OFFSET_IN_STRUCT(cpu_local_var, runq);
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clv_idle_offset = DWARF_GET_OFFSET_IN_STRUCT(cpu_local_var, idle);
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clv_current_offset = DWARF_GET_OFFSET_IN_STRUCT(cpu_local_var, current);
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thread_tid_offset = DWARF_GET_OFFSET_IN_STRUCT(thread, tid);
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thread_proc_offset = DWARF_GET_OFFSET_IN_STRUCT(thread, proc);
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thread_status_offset = DWARF_GET_OFFSET_IN_STRUCT(thread, status);
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thread_sched_list_offset =
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DWARF_GET_OFFSET_IN_STRUCT(thread, sched_list);
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process_pid_offset = DWARF_GET_OFFSET_IN_STRUCT(process, pid);
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process_saved_cmdline_offset =
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DWARF_GET_OFFSET_IN_STRUCT(process, saved_cmdline);
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process_saved_cmdline_len_offset =
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DWARF_GET_OFFSET_IN_STRUCT(process, saved_cmdline_len);
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printf("%3s %s%6s %6s %18s %2s %s\n",
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"CPU", " ", "TID", "PID", "Thread", "ST", "exe");
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@ -991,12 +1088,107 @@ static int mcps(Dwarf_Debug dbg)
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return 0;
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}
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int find_proc(Dwarf_Debug dbg, int pid, unsigned long *rproc)
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{
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int cpu;
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/* Iterate CPUs */
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for (cpu = 0; cpu < nr_cpus; ++cpu) {
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unsigned long per_cpu;
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unsigned long runq;
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unsigned long thread;
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unsigned long thread_sched_list;
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int ipid;
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per_cpu = clv + (clv_size * cpu);
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runq = per_cpu + clv_runq_offset;
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ihk_read_val(per_cpu + clv_runq_offset, &thread_sched_list);
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/* Iterate threads */
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for (; thread_sched_list != runq;
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ihk_read_val(thread_sched_list, &thread_sched_list)) {
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unsigned long proc;
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thread = thread_sched_list - thread_sched_list_offset;
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ihk_read_val(thread + thread_proc_offset, &proc);
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ihk_read_val(proc + process_pid_offset, &ipid);
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if (pid == ipid) {
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*rproc = proc;
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return 0;
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}
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}
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}
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return -1;
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}
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#if 0
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void do_pte_walk_single(Dwarf_Debug dbg,
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unsigned long pt, int level, unsigned long va)
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{
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unsigned long pte;
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int idx = va >> ptl_shift(level);
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ihk_read_val(pt + idx * sizeof(pte), &pte);
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if (pte_is_type_page(pte, level)) {
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}
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if (level > 1) {
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pt =
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do_pte_walk_single();
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}
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}
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int print_pte_single(Dwarf_Debug dbg,
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unsigned long pt, unsigned long va)
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{
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int level = PGTABLE_LEVELS;
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printf("VA: 0x%lx -> \n", va);
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do_pte_walk_single(dbg, pt, PGTABLE_LEVELS, va);
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}
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#endif
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int mcvtop(Dwarf_Debug dbg, int pid, unsigned long vtop_addr)
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{
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unsigned long proc = 0;
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unsigned long init_pt;
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unsigned long vm, ap, pt = 0;
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if (pid != 0) {
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if (find_proc(dbg, pid, &proc) < 0) {
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fprintf(stderr, "%s: error: finding PID %d\n",
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__func__, pid);
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return -1;
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}
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}
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get_pointer_symbol_val(swapper_page_table, &init_pt);
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printf("%s: init_pt: 0x%lx\n", __func__, init_pt);
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if (proc) {
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ihk_read_val(proc + process_vm_offset, &vm);
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ihk_read_val(vm + vm_address_space_offset, &ap);
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ihk_read_val(ap + address_space_page_table_offset, &pt);
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}
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return 0;
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}
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int help;
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int ps;
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int vtop;
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int pid;
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unsigned long vtop_addr;
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static struct option mcinspect_options[] = {
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struct option mcinspect_options[] = {
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{
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.name = "kernel",
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.has_arg = required_argument,
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@ -1015,17 +1207,29 @@ static struct option mcinspect_options[] = {
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.flag = &help,
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.val = 1,
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},
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{
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.name = "debug",
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.has_arg = no_argument,
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.flag = &debug,
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.val = 1,
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},
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{
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.name = "vtop",
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.has_arg = no_argument,
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.flag = &vtop,
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.val = 1,
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},
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{
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.name = "va",
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.has_arg = required_argument,
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.flag = NULL,
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.val = 'v',
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},
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{
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.name = "debug",
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.has_arg = no_argument,
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.flag = &debug,
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.val = 1,
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.name = "pid",
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.has_arg = required_argument,
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.flag = NULL,
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.val = 'p',
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},
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/* end */
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{ NULL, 0, NULL, 0, },
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@ -1048,9 +1252,10 @@ int main(int argc, char **argv)
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help = 0;
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ps = 0;
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vtop = 0;
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vtop_addr = -1;
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vtop_addr = -1UL;
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pid = 0;
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while ((opt = getopt_long(argc, argv, "+k:v:",
|
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while ((opt = getopt_long(argc, argv, "+k:v:p:",
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mcinspect_options, NULL)) != -1) {
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switch (opt) {
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case 'k':
|
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@ -1058,7 +1263,17 @@ int main(int argc, char **argv)
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break;
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case 'v':
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vtop_addr = strtoul(optarg, 0, 0);
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vtop_addr = strtoul(optarg, 0, 16);
|
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if (vtop_addr == 0 ||
|
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errno == EINVAL || errno == ERANGE) {
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fprintf(stderr, "error: invalid VA? (expected format: 0xXXXX)\n\n");
|
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usage(argv);
|
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exit(1);
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}
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break;
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case 'p':
|
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pid = atoi(optarg);
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break;
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}
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}
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@ -1075,10 +1290,16 @@ int main(int argc, char **argv)
|
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}
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if (!ps && !vtop) {
|
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printf("PID: %d\n", pid);
|
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usage(argv);
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exit(1);
|
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}
|
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|
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if (init_bfd_symbols(kernel_path) < 0) {
|
||||
fprintf(stderr, "error: accessing ELF image %s\n", kernel_path);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
mcfd = open("/dev/mcos0", O_RDONLY);
|
||||
if (mcfd < 0) {
|
||||
fprintf(stderr, "error: opening IHK OS device file\n");
|
||||
@ -1097,12 +1318,13 @@ int main(int argc, char **argv)
|
||||
exit(1);
|
||||
}
|
||||
|
||||
init_globals(dbg);
|
||||
|
||||
if (ps)
|
||||
mcps(dbg);
|
||||
|
||||
if (vtop) {
|
||||
fprintf(stderr, "error: not implemented\n");
|
||||
exit(1);
|
||||
mcvtop(dbg, pid, vtop_addr);
|
||||
}
|
||||
|
||||
dwarf_finish(dbg, &error);
|
||||
|
||||
Reference in New Issue
Block a user