Jonas Devlieghere
59d60d0960
On WebAssembly clang only wires a 0- or 2-argument main to the program entry point: EmitMainVoidAlias emits the __main_void alias for a no-argument main, and the 2-argument form is mangled to __main_argc_argv. A 3-argument main(argc, argv, envp) matches neither, so main is never connected to the entry point and is left as an undefined-weak stub whose body is `unreachable`. The affected inferiors trap with "Exception: unreachable" before reaching main (even when run outside the debugger) so any test using them fails on wasm. Drop the unused third parameter, and where the environment is actually iterated read it from `environ` instead. The inferiors now run on WebAssembly and behave identically on other platforms.
65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#ifdef _WIN32
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#define environ _environ
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#else
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extern char **environ;
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#endif
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// This simple program is to test the lldb Python API SBTarget.
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//
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// When stopped on breakpoint 1, and then 2, we can get the line entries using
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// SBFrame API SBFrame.GetLineEntry(). We'll get the start addresses for the
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// two line entries; with the start address (of SBAddress type), we can then
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// resolve the symbol context using the SBTarget API
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// SBTarget.ResolveSymbolContextForAddress().
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//
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// The two symbol context should point to the same symbol, i.e., 'a' function.
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char my_global_var_of_char_type = 'X'; // Test SBTarget.FindGlobalVariables(...).
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int a(int);
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int b(int);
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int c(int);
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int a(int val)
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{
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if (val <= 1) // Find the line number for breakpoint 1 here.
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val = b(val);
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else if (val >= 3)
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val = c(val);
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return val; // Find the line number for breakpoint 2 here.
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}
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int b(int val)
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{
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return c(val);
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}
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int c(int val)
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{
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return val + 3;
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}
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int main(int argc, char const *argv[]) {
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// Set a break at entry to main.
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int A1 = a(1); // a(1) -> b(1) -> c(1)
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printf("a(1) returns %d\n", A1);
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int B2 = b(2); // b(2) -> c(2)
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printf("b(2) returns %d\n", B2);
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int A3 = a(3); // a(3) -> c(3)
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printf("a(3) returns %d\n", A3);
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for (int i = 1; i < argc; i++) {
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printf("arg: %s\n", argv[i]);
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}
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for (char **e = environ; *e; ++e)
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printf("env: %s\n", *e);
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return 0;
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}
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