ae685e7aab
If unwind info is not available at the current IP, unw_get_proc_info should return a zero-filled structure rather than the info of the previous IP. This change also makes unw_get_proc_info return UNW_ENOINFO instead of UNW_ESUCCESS. Patch by Amanieu d'Antras! llvm-svn: 372407
64 lines
1.0 KiB
C++
64 lines
1.0 KiB
C++
#include <libunwind.h>
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#include <stdlib.h>
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void backtrace(int lower_bound) {
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unw_context_t context;
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unw_getcontext(&context);
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unw_cursor_t cursor;
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unw_init_local(&cursor, &context);
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int n = 0;
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do {
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++n;
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if (n > 100) {
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abort();
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}
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} while (unw_step(&cursor) > 0);
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if (n < lower_bound) {
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abort();
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}
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}
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void test1(int i) {
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backtrace(i);
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}
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void test2(int i, int j) {
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backtrace(i);
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test1(j);
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}
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void test3(int i, int j, int k) {
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backtrace(i);
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test2(j, k);
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}
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void test_no_info() {
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unw_context_t context;
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unw_getcontext(&context);
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unw_cursor_t cursor;
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unw_init_local(&cursor, &context);
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unw_proc_info_t info;
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int ret = unw_get_proc_info(&cursor, &info);
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if (ret != UNW_ESUCCESS)
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abort();
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// Set the IP to an address clearly outside any function.
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unw_set_reg(&cursor, UNW_REG_IP, (unw_word_t)&context);
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ret = unw_get_proc_info(&cursor, &info);
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if (ret != UNW_ENOINFO)
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abort();
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}
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int main() {
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test1(1);
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test2(1, 2);
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test3(1, 2, 3);
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test_no_info();
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}
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